# Corvus Gold Makes New NW Sierra Blanca Zone Discovery 700 Metres West of YellowJacket Deposit, North Bullfrog Project, NV Canonical Atlas analysis: https://atlas-extractions.minestarters.com/news/corvus-gold-makes-new-nw-sierra-blanca-zone-discovery-700-metres-west-of-yellowj--4003eb1a-1e7e-41bb-951b-f9c2feec4280 Original source: https://money.tmx.com/en/quote/KOR/news/69485318/corvus-gold-makes-new-nw-sierra-blanca-zone-discovery-700-metres-west-of-yellowj Publisher: tmx Original announcement: 2015-11-03T08:00:00.000Z Analysis by Minestarters Atlas Atlas analysis published: Unknown date Atlas analysis updated: Unknown date - Company: Corvus Gold Inc. - Ticker: KOR - Exchange: TSX - Region: Nevada - Primary commodity: Gold - Secondary commodities: Silver - Document categories: Drill results, Resource update - Extracted: 2026-09-16 07:47:28 UTC Narrative sentiment: 0.80 · Bullish ## Minestarters Atlas summary Corvus Gold announced a new gold-silver discovery at its NW Sierra Blanca Zone, 700 metres west of the YellowJacket Deposit, within the North Bullfrog Project in Nevada. Initial drill results from this blind discovery include 19.82 metres at 1.28 g/t gold and 1.8 g/t silver, indicating expansion potential. The company also detailed its existing NI 43-101 compliant resources, which include significant Measured and Indicated gold and silver for both mill and heap leach processing. Reasoning: Corvus Gold announced a new gold-silver discovery at the NW Sierra Blanca Zone with encouraging initial drill results, expanding the known mineralization at the North Bullfrog Project. The project also hosts substantial NI 43-101 compliant resources, though the heap leach portion is largely inferred. - Positive factor: New blind discovery at NW Sierra Blanca Zone - Positive factor: Encouraging initial gold-silver drill intercepts, including 19.82m at 1.28 g/t Au - Positive factor: Expansion potential for the North Bullfrog Project - Positive factor: Existing significant NI 43-101 compliant gold-silver resources - Positive factor: High Measured and Indicated confidence for the mill processing resource - Positive factor: Comprehensive QA/QC disclosure and QP sign-off - Negative factor: Drill intercepts are reported as apparent width only, true width not disclosed - Negative factor: Heap leach resource has a high proportion of Inferred category \(82.8%\) Low confidence — this extraction should be reviewed alongside the original source. Facts used in scoring: 36 ## Classification and evidence **Step-Out Extension** Polarity: positive Definition: Mineralization extended beyond the previously known limit. Why it applies: The document describes a 'newly identified structural zone' and 'blind discovery' in an 'unexplored part of the property', indicating mineralization extended beyond previously known limits. Evidence · text > Corvus Gold Makes New NW Sierra Blanca Zone Discovery 700 Metres West of YellowJacket Deposit, North Bullfrog Project, NV **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: The release details QA/QC procedures including certified laboratory \(ALS Chemex, ISO 17025\), insertion of blanks and standards, and duplicate samples, with QP sign-off. Evidence · text > ALS Chemex's quality system complies with the requirements for the International Standards ISO 9001:2000 and ISO 17025:1999. Analytical accuracy and precision are monitored by the analysis of reagent blanks, reference material and replicate samples. Finally, representative blind duplicate samples are forwarded to ALS Chemex and an ISO compliant third party laboratory for additional quality control. **Compositing Transparent** Polarity: positive Definition: Cut-off grade and internal dilution rules are clearly stated for reported intervals. Why it applies: The document clearly states the cut-off grades used for calculating mineralized thickness and internal vein/stockwork intervals. Evidence · text > Mineralized thickness calculated @ 0.10 g/t Au cutoff with internal vein/stockwork intervals calculated @ 1.0 g/t Au cutoff **Apparent Width Only** Polarity: negative Definition: Interval given as downhole width with no true width or drill orientation — apparent width may overstate true thickness. Why it applies: The drill results table explicitly states that 'Reported drill intercepts are not true widths' and there is 'insufficient data... to calculate its true orientation'. Evidence · table > Reported drill intercepts are not true widths. At this time, there is insufficient data with respect to the shape of the mineralization to calculate its true orientation in space. **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: The resource estimates are explicitly stated to be prepared in accordance with NI 43-101. Evidence · text > all resource estimates contained in or incorporated by reference in this press release have been prepared in accordance with NI 43-101 **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: Jeffrey A. Pontius and Carl E. Brechtel are named as Qualified Persons who have supervised and approved the disclosure. Evidence · text > Jeffrey A. Pontius \(CPG 11044\), a qualified person as defined by National Instrument 43-101, has supervised the preparation of the scientific and technical information that forms the basis for this news release and has approved the disclosure herein. Mr. Pontius is not independent of Corvus, as he is the CEO & President and holds common shares and incentive stock options. Carl E. Brechtel , \(Nevada PE 008744 and Registered Member 353000 of SME\), a qualified person as defined by National Instrument 43-101, has coordinated execution of the work outlined in this news release and has approved the disclosure herein. **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: A significant portion of the reported resource, particularly for heap leach processing, is in the Inferred category. Evidence · text > inferred mineral resource of 176.3 Mt at an average grade of 0.19 g/t gold and 0.67 g/t silver, containing 1,077.4k ounces of gold and 3,799.2k ounces of silver for oxide, heap leach processing. **All Inferred** Polarity: negative Definition: M&I share below the weak bound — very early stage, no engineering confidence. Why it applies: The heap leach resource has a very high proportion of Inferred material \(176.3 Mt Inferred vs 22.86 Mt Indicated and 0.3 Mt Measured\). Evidence · text > an inferred mineral resource of 176.3 Mt at an average grade of 0.19 g/t gold and 0.67 g/t silver, containing 1,077.4k ounces of gold and 3,799.2k ounces of silver for oxide, heap leach processing. **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: The document provides updated mineral resource estimates for the North Bullfrog project. Evidence · text > The North Bullfrog project includes numerous prospective gold targets at various stages of exploration with four having NI 43-101 compliant mineral resources \(Sierra Blanca, Jolly Jane, Mayflower and YellowJacket\). ## Extracted facts Stored fact records: 36. Some facts used in scoring do not have a stored record. ## Drill Results (24) ### NB-15-268 [Link to this fact](https://atlas-extractions.minestarters.com/news/corvus-gold-makes-new-nw-sierra-blanca-zone-discovery-700-metres-west-of-yellowj--4003eb1a-1e7e-41bb-951b-f9c2feec4280#fact-drill-facts-0) North Bullfrog · gold #### Identity - Hole ID: NB-15-268 - Project: North Bullfrog - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: KOR #### Geometry - Grade: 0.27 - Grade Unit: g/t - Intercept: 9.15 m - From: 39.62 m - To: 48.77 m - Intercept Depth: 39.62 m #### Classification - Program: exploration - Sample Type: drill - Group ID: NB-15-268:39.62-48.77 - Mining Method: open\_pit #### Location - Location: NW Sierra Blanca Zone - Loc. Source: document #### QA/QC - Laboratory: ALS Chemex - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Deleterious - Deleterious Flag: No #### Metal Equivalent - Assumptions Disclosed: No #### Compositing - Cutoff Grade: 0.1 - Cutoff Unit: g/t Au #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2015-11-03T00:00:00.000Z Reasoning: This intercept is part of a new discovery but shows a low gold grade, making it less material on its own. - Positive factor: Part of a new discovery in an unexplored area - Negative factor: Low gold grade for an exploration intercept - Negative factor: Apparent width only Evidence · table > 0.27 Context: 9.15 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is true **Nearology Play** Polarity: neutral Definition: Value premise rests on proximity to a known deposit rather than own results. Why it applies: proximity is offered as the value premise: "The project has excellent infrastructure, being adjacent to a major highway and power corridor as well as a large water " ### NB-15-268 [Link to this fact](https://atlas-extractions.minestarters.com/news/corvus-gold-makes-new-nw-sierra-blanca-zone-discovery-700-metres-west-of-yellowj--4003eb1a-1e7e-41bb-951b-f9c2feec4280#fact-drill-facts-1) North Bullfrog · silver #### Identity - Hole ID: NB-15-268 - Project: North Bullfrog - Commodity: silver - Region: usa\_nv - Reported Region: usa\_nv - Ticker: KOR #### Geometry - Grade: 0.45 - Grade Unit: g/t - Intercept: 9.15 m - From: 39.62 m - To: 48.77 m - Intercept Depth: 39.62 m #### Classification - Program: exploration - Sample Type: drill - Group ID: NB-15-268:39.62-48.77 - Mining Method: open\_pit #### Location - Location: NW Sierra Blanca Zone - Loc. Source: document #### QA/QC - Laboratory: ALS Chemex - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Deleterious - Deleterious Flag: No #### Metal Equivalent - Assumptions Disclosed: No #### Compositing - Cutoff Grade: 0.1 - Cutoff Unit: g/t Au #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2015-11-03T00:00:00.000Z Reasoning: This intercept is part of a new discovery but shows a low silver grade, contributing minimally to overall materiality. - Positive factor: Part of a new discovery in an unexplored area - Negative factor: Low silver grade - Negative factor: Apparent width only Evidence · table > 0.45 Context: 9.15 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is true **Nearology Play** Polarity: neutral Definition: Value premise rests on proximity to a known deposit rather than own results. Why it applies: proximity is offered as the value premise: "The project has excellent infrastructure, being adjacent to a major highway and power corridor as well as a large water " ### NB-15-268 [Link to this fact](https://atlas-extractions.minestarters.com/news/corvus-gold-makes-new-nw-sierra-blanca-zone-discovery-700-metres-west-of-yellowj--4003eb1a-1e7e-41bb-951b-f9c2feec4280#fact-drill-facts-2) North Bullfrog · gold #### Identity - Hole ID: NB-15-268 - Project: North Bullfrog - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: KOR #### Geometry - Grade: 0.45 - Grade Unit: g/t - Intercept: 42.67 m - From: 53.34 m - To: 96.01 m - Intercept Depth: 39.62 m #### Classification - Program: exploration - Sample Type: drill - Group ID: NB-15-268:53.34-96.01 - Mining Method: open\_pit #### Location - Location: NW Sierra Blanca Zone - Loc. Source: document #### QA/QC - Laboratory: ALS Chemex - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Deleterious - Deleterious Flag: No #### Metal Equivalent - Assumptions Disclosed: No #### Compositing - Cutoff Grade: 0.1 - Cutoff Unit: g/t Au #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2015-11-03T00:00:00.000Z Reasoning: This intercept shows a good length but a weak gold grade, contributing to the overall discovery but not a high-grade highlight. - Positive factor: Part of a new discovery in an unexplored area - Positive factor: Good intercept length \(42.67m\) - Negative factor: Weak gold grade for an exploration intercept - Negative factor: Apparent width only Evidence · table > 0.45 Context: 42.67 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is true **Nearology Play** Polarity: neutral Definition: Value premise rests on proximity to a known deposit rather than own results. Why it applies: proximity is offered as the value premise: "The project has excellent infrastructure, being adjacent to a major highway and power corridor as well as a large water " ### NB-15-268 [Link to this fact](https://atlas-extractions.minestarters.com/news/corvus-gold-makes-new-nw-sierra-blanca-zone-discovery-700-metres-west-of-yellowj--4003eb1a-1e7e-41bb-951b-f9c2feec4280#fact-drill-facts-3) North Bullfrog · silver #### Identity - Hole ID: NB-15-268 - Project: North Bullfrog - Commodity: silver - Region: usa\_nv - Reported Region: usa\_nv - Ticker: KOR #### Geometry - Grade: 0.61 - Grade Unit: g/t - Intercept: 42.67 m - From: 53.34 m - To: 96.01 m - Intercept Depth: 39.62 m #### Classification - Program: exploration - Sample Type: drill - Group ID: NB-15-268:53.34-96.01 - Mining Method: open\_pit #### Location - Location: NW Sierra Blanca Zone - Loc. Source: document #### QA/QC - Laboratory: ALS Chemex - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Deleterious - Deleterious Flag: No #### Metal Equivalent - Assumptions Disclosed: No #### Compositing - Cutoff Grade: 0.1 - Cutoff Unit: g/t Au #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2015-11-03T00:00:00.000Z Reasoning: This intercept shows a good length but a low silver grade, contributing to the overall discovery but not a high-grade highlight. - Positive factor: Part of a new discovery in an unexplored area - Positive factor: Good intercept length \(42.67m\) - Negative factor: Low silver grade - Negative factor: Apparent width only Evidence · table > 0.61 Context: 42.67 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is true **Nearology Play** Polarity: neutral Definition: Value premise rests on proximity to a known deposit rather than own results. Why it applies: proximity is offered as the value premise: "The project has excellent infrastructure, being adjacent to a major highway and power corridor as well as a large water " ### NB-15-268 [Link to this fact](https://atlas-extractions.minestarters.com/news/corvus-gold-makes-new-nw-sierra-blanca-zone-discovery-700-metres-west-of-yellowj--4003eb1a-1e7e-41bb-951b-f9c2feec4280#fact-drill-facts-4) North Bullfrog · gold #### Identity - Hole ID: NB-15-268 - Project: North Bullfrog - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: KOR #### Geometry - Grade: 1.15 - Grade Unit: g/t - Intercept: 1.52 m - From: 86.87 m - To: 88.39 m - Intercept Depth: 39.62 m #### Classification - Program: exploration - Sample Type: drill - Group ID: NB-15-268:86.87-88.39 - Mining Method: open\_pit #### Location - Location: NW Sierra Blanca Zone - Loc. Source: document #### QA/QC - Laboratory: ALS Chemex - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Deleterious - Deleterious Flag: No #### Metal Equivalent - Assumptions Disclosed: No #### Compositing - Cutoff Grade: 1 - Cutoff Unit: g/t Au #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2015-11-03T00:00:00.000Z Reasoning: This sub-interval shows a moderate gold grade but is very narrow, limiting its individual materiality despite being part of a new discovery. - Positive factor: Part of a new discovery in an unexplored area - Positive factor: Moderate gold grade for an open pit target - Negative factor: Narrow intercept length - Negative factor: Apparent width only Evidence · table > 1.15 Context: 1.52 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is true **Nearology Play** Polarity: neutral Definition: Value premise rests on proximity to a known deposit rather than own results. Why it applies: proximity is offered as the value premise: "The project has excellent infrastructure, being adjacent to a major highway and power corridor as well as a large water " ### NB-15-268 [Link to this fact](https://atlas-extractions.minestarters.com/news/corvus-gold-makes-new-nw-sierra-blanca-zone-discovery-700-metres-west-of-yellowj--4003eb1a-1e7e-41bb-951b-f9c2feec4280#fact-drill-facts-5) North Bullfrog · silver #### Identity - Hole ID: NB-15-268 - Project: North Bullfrog - Commodity: silver - Region: usa\_nv - Reported Region: usa\_nv - Ticker: KOR #### Geometry - Grade: 1.51 - Grade Unit: g/t - Intercept: 1.52 m - From: 86.87 m - To: 88.39 m - Intercept Depth: 39.62 m #### Classification - Program: exploration - Sample Type: drill - Group ID: NB-15-268:86.87-88.39 - Mining Method: open\_pit #### Location - Location: NW Sierra Blanca Zone - Loc. Source: document #### QA/QC - Laboratory: ALS Chemex - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Deleterious - Deleterious Flag: No #### Metal Equivalent - Assumptions Disclosed: No #### Compositing - Cutoff Grade: 1 - Cutoff Unit: g/t Au #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2015-11-03T00:00:00.000Z Reasoning: This sub-interval shows a low silver grade over a narrow width, contributing minimally to overall materiality. - Positive factor: Part of a new discovery in an unexplored area - Negative factor: Low silver grade - Negative factor: Narrow intercept length - Negative factor: Apparent width only Evidence · table > 1.51 Context: 1.52 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is true **Nearology Play** Polarity: neutral Definition: Value premise rests on proximity to a known deposit rather than own results. Why it applies: proximity is offered as the value premise: "The project has excellent infrastructure, being adjacent to a major highway and power corridor as well as a large water " ### NB-15-268 [Link to this fact](https://atlas-extractions.minestarters.com/news/corvus-gold-makes-new-nw-sierra-blanca-zone-discovery-700-metres-west-of-yellowj--4003eb1a-1e7e-41bb-951b-f9c2feec4280#fact-drill-facts-6) North Bullfrog · gold #### Identity - Hole ID: NB-15-268 - Project: North Bullfrog - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: KOR #### Geometry - Grade: 0.21 - Grade Unit: g/t - Intercept: 4.58 m - From: 108.2 m - To: 112.78 m - Intercept Depth: 39.62 m #### Classification - Program: exploration - Sample Type: drill - Group ID: NB-15-268:108.2-112.78 - Mining Method: open\_pit #### Location - Location: NW Sierra Blanca Zone - Loc. Source: document #### QA/QC - Laboratory: ALS Chemex - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Deleterious - Deleterious Flag: No #### Metal Equivalent - Assumptions Disclosed: No #### Compositing - Cutoff Grade: 0.1 - Cutoff Unit: g/t Au #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2015-11-03T00:00:00.000Z Reasoning: This intercept shows a very low gold grade, contributing minimally to overall materiality despite being part of a new discovery. - Positive factor: Part of a new discovery in an unexplored area - Negative factor: Very low gold grade - Negative factor: Apparent width only Evidence · table > 0.21 Context: 4.58 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is true **Nearology Play** Polarity: neutral Definition: Value premise rests on proximity to a known deposit rather than own results. Why it applies: proximity is offered as the value premise: "The project has excellent infrastructure, being adjacent to a major highway and power corridor as well as a large water " ### NB-15-268 [Link to this fact](https://atlas-extractions.minestarters.com/news/corvus-gold-makes-new-nw-sierra-blanca-zone-discovery-700-metres-west-of-yellowj--4003eb1a-1e7e-41bb-951b-f9c2feec4280#fact-drill-facts-7) North Bullfrog · silver #### Identity - Hole ID: NB-15-268 - Project: North Bullfrog - Commodity: silver - Region: usa\_nv - Reported Region: usa\_nv - Ticker: KOR #### Geometry - Grade: 0.04 - Grade Unit: g/t - Intercept: 4.58 m - From: 108.2 m - To: 112.78 m - Intercept Depth: 39.62 m #### Classification - Program: exploration - Sample Type: drill - Group ID: NB-15-268:108.2-112.78 - Mining Method: open\_pit #### Location - Location: NW Sierra Blanca Zone - Loc. Source: document #### QA/QC - Laboratory: ALS Chemex - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Deleterious - Deleterious Flag: No #### Metal Equivalent - Assumptions Disclosed: No #### Compositing - Cutoff Grade: 0.1 - Cutoff Unit: g/t Au #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2015-11-03T00:00:00.000Z Reasoning: This intercept shows an extremely low silver grade, contributing negligibly to overall materiality despite being part of a new discovery. - Positive factor: Part of a new discovery in an unexplored area - Negative factor: Extremely low silver grade - Negative factor: Apparent width only Evidence · table > 0.04 Context: 4.58 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is true **Nearology Play** Polarity: neutral Definition: Value premise rests on proximity to a known deposit rather than own results. Why it applies: proximity is offered as the value premise: "The project has excellent infrastructure, being adjacent to a major highway and power corridor as well as a large water " ### NB-15-269 [Link to this fact](https://atlas-extractions.minestarters.com/news/corvus-gold-makes-new-nw-sierra-blanca-zone-discovery-700-metres-west-of-yellowj--4003eb1a-1e7e-41bb-951b-f9c2feec4280#fact-drill-facts-8) North Bullfrog · gold #### Identity - Hole ID: NB-15-269 - Project: North Bullfrog - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: KOR #### Geometry - Grade: 0.64 - Grade Unit: g/t - Intercept: 6.09 m - From: 13.72 m - To: 19.81 m - Intercept Depth: 13.72 m #### Classification - Program: exploration - Sample Type: drill - Group ID: NB-15-269:13.72-19.81 - Mining Method: open\_pit #### Location - Location: NW Sierra Blanca Zone - Loc. Source: document #### QA/QC - Laboratory: ALS Chemex - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Deleterious - Deleterious Flag: No #### Metal Equivalent - Assumptions Disclosed: No #### Compositing - Cutoff Grade: 0.1 - Cutoff Unit: g/t Au #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2015-11-03T00:00:00.000Z Reasoning: This intercept shows a weak gold grade over a moderate length, contributing to the overall discovery. - Positive factor: Part of a new discovery in an unexplored area - Positive factor: Weak gold grade for an open pit target - Negative factor: Apparent width only Evidence · table > 0.64 Context: 6.09 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is true **Nearology Play** Polarity: neutral Definition: Value premise rests on proximity to a known deposit rather than own results. Why it applies: proximity is offered as the value premise: "The project has excellent infrastructure, being adjacent to a major highway and power corridor as well as a large water " ### NB-15-269 [Link to this fact](https://atlas-extractions.minestarters.com/news/corvus-gold-makes-new-nw-sierra-blanca-zone-discovery-700-metres-west-of-yellowj--4003eb1a-1e7e-41bb-951b-f9c2feec4280#fact-drill-facts-9) North Bullfrog · silver #### Identity - Hole ID: NB-15-269 - Project: North Bullfrog - Commodity: silver - Region: usa\_nv - Reported Region: usa\_nv - Ticker: KOR #### Geometry - Grade: 0.77 - Grade Unit: g/t - Intercept: 6.09 m - From: 13.72 m - To: 19.81 m - Intercept Depth: 13.72 m #### Classification - Program: exploration - Sample Type: drill - Group ID: NB-15-269:13.72-19.81 - Mining Method: open\_pit #### Location - Location: NW Sierra Blanca Zone - Loc. Source: document #### QA/QC - Laboratory: ALS Chemex - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Deleterious - Deleterious Flag: No #### Metal Equivalent - Assumptions Disclosed: No #### Compositing - Cutoff Grade: 0.1 - Cutoff Unit: g/t Au #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2015-11-03T00:00:00.000Z Reasoning: This intercept shows a low silver grade over a moderate length, contributing to the overall discovery. - Positive factor: Part of a new discovery in an unexplored area - Negative factor: Low silver grade - Negative factor: Apparent width only Evidence · table > 0.77 Context: 6.09 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is true **Nearology Play** Polarity: neutral Definition: Value premise rests on proximity to a known deposit rather than own results. Why it applies: proximity is offered as the value premise: "The project has excellent infrastructure, being adjacent to a major highway and power corridor as well as a large water " ### NB-15-269 [Link to this fact](https://atlas-extractions.minestarters.com/news/corvus-gold-makes-new-nw-sierra-blanca-zone-discovery-700-metres-west-of-yellowj--4003eb1a-1e7e-41bb-951b-f9c2feec4280#fact-drill-facts-10) North Bullfrog · gold #### Identity - Hole ID: NB-15-269 - Project: North Bullfrog - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: KOR #### Geometry - Grade: 0.37 - Grade Unit: g/t - Intercept: 7.62 m - From: 54.86 m - To: 62.48 m - Intercept Depth: 13.72 m #### Classification - Program: exploration - Sample Type: drill - Group ID: NB-15-269:54.86-62.48 - Mining Method: open\_pit #### Location - Location: NW Sierra Blanca Zone - Loc. Source: document #### QA/QC - Laboratory: ALS Chemex - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Deleterious - Deleterious Flag: No #### Metal Equivalent - Assumptions Disclosed: No #### Compositing - Cutoff Grade: 0.1 - Cutoff Unit: g/t Au #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2015-11-03T00:00:00.000Z Reasoning: This intercept shows a low gold grade, contributing to the overall discovery but not a high-grade highlight. - Positive factor: Part of a new discovery in an unexplored area - Negative factor: Low gold grade - Negative factor: Apparent width only Evidence · table > 0.37 Context: 7.62 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is true **Nearology Play** Polarity: neutral Definition: Value premise rests on proximity to a known deposit rather than own results. Why it applies: proximity is offered as the value premise: "The project has excellent infrastructure, being adjacent to a major highway and power corridor as well as a large water " ### NB-15-269 [Link to this fact](https://atlas-extractions.minestarters.com/news/corvus-gold-makes-new-nw-sierra-blanca-zone-discovery-700-metres-west-of-yellowj--4003eb1a-1e7e-41bb-951b-f9c2feec4280#fact-drill-facts-11) North Bullfrog · silver #### Identity - Hole ID: NB-15-269 - Project: North Bullfrog - Commodity: silver - Region: usa\_nv - Reported Region: usa\_nv - Ticker: KOR #### Geometry - Grade: 1.1 - Grade Unit: g/t - Intercept: 7.62 m - From: 54.86 m - To: 62.48 m - Intercept Depth: 13.72 m #### Classification - Program: exploration - Sample Type: drill - Group ID: NB-15-269:54.86-62.48 - Mining Method: open\_pit #### Location - Location: NW Sierra Blanca Zone - Loc. Source: document #### QA/QC - Laboratory: ALS Chemex - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Deleterious - Deleterious Flag: No #### Metal Equivalent - Assumptions Disclosed: No #### Compositing - Cutoff Grade: 0.1 - Cutoff Unit: g/t Au #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2015-11-03T00:00:00.000Z Reasoning: This intercept shows a low silver grade, contributing to the overall discovery but not a high-grade highlight. - Positive factor: Part of a new discovery in an unexplored area - Negative factor: Low silver grade - Negative factor: Apparent width only Evidence · table > 1.1 Context: 7.62 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is true **Nearology Play** Polarity: neutral Definition: Value premise rests on proximity to a known deposit rather than own results. Why it applies: proximity is offered as the value premise: "The project has excellent infrastructure, being adjacent to a major highway and power corridor as well as a large water " ### NB-15-269 [Link to this fact](https://atlas-extractions.minestarters.com/news/corvus-gold-makes-new-nw-sierra-blanca-zone-discovery-700-metres-west-of-yellowj--4003eb1a-1e7e-41bb-951b-f9c2feec4280#fact-drill-facts-12) North Bullfrog · gold #### Identity - Hole ID: NB-15-269 - Project: North Bullfrog - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: KOR #### Geometry - Grade: 1.28 - Grade Unit: g/t - Intercept: 19.82 m - From: 92.96 m - To: 112.78 m - Intercept Depth: 13.72 m #### Classification - Program: exploration - Sample Type: drill - Group ID: NB-15-269:92.96-112.78 - Mining Method: open\_pit #### Location - Location: NW Sierra Blanca Zone - Loc. Source: document #### QA/QC - Laboratory: ALS Chemex - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Deleterious - Deleterious Flag: No #### Metal Equivalent - Assumptions Disclosed: No #### Compositing - Cutoff Grade: 0.1 - Cutoff Unit: g/t Au #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2015-11-03T00:00:00.000Z Reasoning: This is a significant intercept with a moderate gold grade over a good length, representing a key highlight of the new discovery. - Positive factor: Part of a new discovery in an unexplored area - Positive factor: Moderate gold grade for an open pit target - Positive factor: Good intercept length \(19.82m\) - Negative factor: Apparent width only Evidence · table > 1.28 Context: 19.82 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is true **Nearology Play** Polarity: neutral Definition: Value premise rests on proximity to a known deposit rather than own results. Why it applies: proximity is offered as the value premise: "The project has excellent infrastructure, being adjacent to a major highway and power corridor as well as a large water " ### NB-15-269 [Link to this fact](https://atlas-extractions.minestarters.com/news/corvus-gold-makes-new-nw-sierra-blanca-zone-discovery-700-metres-west-of-yellowj--4003eb1a-1e7e-41bb-951b-f9c2feec4280#fact-drill-facts-13) North Bullfrog · silver #### Identity - Hole ID: NB-15-269 - Project: North Bullfrog - Commodity: silver - Region: usa\_nv - Reported Region: usa\_nv - Ticker: KOR #### Geometry - Grade: 1.8 - Grade Unit: g/t - Intercept: 19.82 m - From: 92.96 m - To: 112.78 m - Intercept Depth: 13.72 m #### Classification - Program: exploration - Sample Type: drill - Group ID: NB-15-269:92.96-112.78 - Mining Method: open\_pit #### Location - Location: NW Sierra Blanca Zone - Loc. Source: document #### QA/QC - Laboratory: ALS Chemex - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Deleterious - Deleterious Flag: No #### Metal Equivalent - Assumptions Disclosed: No #### Compositing - Cutoff Grade: 0.1 - Cutoff Unit: g/t Au #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2015-11-03T00:00:00.000Z Reasoning: This intercept shows a low silver grade over a good length, contributing to the overall discovery. - Positive factor: Part of a new discovery in an unexplored area - Positive factor: Good intercept length \(19.82m\) - Negative factor: Low silver grade - Negative factor: Apparent width only Evidence · table > 1.8 Context: 19.82 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is true **Nearology Play** Polarity: neutral Definition: Value premise rests on proximity to a known deposit rather than own results. Why it applies: proximity is offered as the value premise: "The project has excellent infrastructure, being adjacent to a major highway and power corridor as well as a large water " ### NB-15-269 [Link to this fact](https://atlas-extractions.minestarters.com/news/corvus-gold-makes-new-nw-sierra-blanca-zone-discovery-700-metres-west-of-yellowj--4003eb1a-1e7e-41bb-951b-f9c2feec4280#fact-drill-facts-14) North Bullfrog · gold #### Identity - Hole ID: NB-15-269 - Project: North Bullfrog - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: KOR #### Geometry - Grade: 0.23 - Grade Unit: g/t - Intercept: 4.57 m - From: 167.64 m - To: 172.21 m - Intercept Depth: 13.72 m #### Classification - Program: exploration - Sample Type: drill - Group ID: NB-15-269:167.64-172.21 - Mining Method: open\_pit #### Location - Location: NW Sierra Blanca Zone - Loc. Source: document #### QA/QC - Laboratory: ALS Chemex - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Deleterious - Deleterious Flag: No #### Metal Equivalent - Assumptions Disclosed: No #### Compositing - Cutoff Grade: 0.1 - Cutoff Unit: g/t Au #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2015-11-03T00:00:00.000Z Reasoning: This intercept shows a very low gold grade, contributing minimally to overall materiality despite being part of a new discovery. - Positive factor: Part of a new discovery in an unexplored area - Negative factor: Very low gold grade - Negative factor: Apparent width only Evidence · table > 0.23 Context: 4.57 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is true **Nearology Play** Polarity: neutral Definition: Value premise rests on proximity to a known deposit rather than own results. Why it applies: proximity is offered as the value premise: "The project has excellent infrastructure, being adjacent to a major highway and power corridor as well as a large water " ### NB-15-269 [Link to this fact](https://atlas-extractions.minestarters.com/news/corvus-gold-makes-new-nw-sierra-blanca-zone-discovery-700-metres-west-of-yellowj--4003eb1a-1e7e-41bb-951b-f9c2feec4280#fact-drill-facts-15) North Bullfrog · silver #### Identity - Hole ID: NB-15-269 - Project: North Bullfrog - Commodity: silver - Region: usa\_nv - Reported Region: usa\_nv - Ticker: KOR #### Geometry - Grade: 0.5 - Grade Unit: g/t - Intercept: 4.57 m - From: 167.64 m - To: 172.21 m - Intercept Depth: 13.72 m #### Classification - Program: exploration - Sample Type: drill - Group ID: NB-15-269:167.64-172.21 - Mining Method: open\_pit #### Location - Location: NW Sierra Blanca Zone - Loc. Source: document #### QA/QC - Laboratory: ALS Chemex - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Deleterious - Deleterious Flag: No #### Metal Equivalent - Assumptions Disclosed: No #### Compositing - Cutoff Grade: 0.1 - Cutoff Unit: g/t Au #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2015-11-03T00:00:00.000Z Reasoning: This intercept shows a very low silver grade, contributing minimally to overall materiality despite being part of a new discovery. - Positive factor: Part of a new discovery in an unexplored area - Negative factor: Very low silver grade - Negative factor: Apparent width only Evidence · table > 0.5 Context: 4.57 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is true **Nearology Play** Polarity: neutral Definition: Value premise rests on proximity to a known deposit rather than own results. Why it applies: proximity is offered as the value premise: "The project has excellent infrastructure, being adjacent to a major highway and power corridor as well as a large water " ### NB-15-270 [Link to this fact](https://atlas-extractions.minestarters.com/news/corvus-gold-makes-new-nw-sierra-blanca-zone-discovery-700-metres-west-of-yellowj--4003eb1a-1e7e-41bb-951b-f9c2feec4280#fact-drill-facts-16) North Bullfrog · gold #### Identity - Hole ID: NB-15-270 - Project: North Bullfrog - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: KOR #### Geometry - Grade: 0.35 - Grade Unit: g/t - Intercept: 9.14 m - From: 45.72 m - To: 54.86 m - Intercept Depth: 45.72 m #### Classification - Program: exploration - Sample Type: drill - Group ID: NB-15-270:45.72-54.86 - Mining Method: open\_pit #### Location - Location: NW Sierra Blanca Zone - Loc. Source: document #### QA/QC - Laboratory: ALS Chemex - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Deleterious - Deleterious Flag: No #### Metal Equivalent - Assumptions Disclosed: No #### Compositing - Cutoff Grade: 0.1 - Cutoff Unit: g/t Au #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2015-11-03T00:00:00.000Z Reasoning: This intercept shows a low gold grade, contributing to the overall discovery but not a high-grade highlight. - Positive factor: Part of a new discovery in an unexplored area - Negative factor: Low gold grade - Negative factor: Apparent width only Evidence · table > 0.35 Context: 9.14 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is true **Nearology Play** Polarity: neutral Definition: Value premise rests on proximity to a known deposit rather than own results. Why it applies: proximity is offered as the value premise: "The project has excellent infrastructure, being adjacent to a major highway and power corridor as well as a large water " ### NB-15-270 [Link to this fact](https://atlas-extractions.minestarters.com/news/corvus-gold-makes-new-nw-sierra-blanca-zone-discovery-700-metres-west-of-yellowj--4003eb1a-1e7e-41bb-951b-f9c2feec4280#fact-drill-facts-17) North Bullfrog · silver #### Identity - Hole ID: NB-15-270 - Project: North Bullfrog - Commodity: silver - Region: usa\_nv - Reported Region: usa\_nv - Ticker: KOR #### Geometry - Grade: 0.58 - Grade Unit: g/t - Intercept: 9.14 m - From: 45.72 m - To: 54.86 m - Intercept Depth: 45.72 m #### Classification - Program: exploration - Sample Type: drill - Group ID: NB-15-270:45.72-54.86 - Mining Method: open\_pit #### Location - Location: NW Sierra Blanca Zone - Loc. Source: document #### QA/QC - Laboratory: ALS Chemex - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Deleterious - Deleterious Flag: No #### Metal Equivalent - Assumptions Disclosed: No #### Compositing - Cutoff Grade: 0.1 - Cutoff Unit: g/t Au #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2015-11-03T00:00:00.000Z Reasoning: This intercept shows a low silver grade, contributing to the overall discovery but not a high-grade highlight. - Positive factor: Part of a new discovery in an unexplored area - Negative factor: Low silver grade - Negative factor: Apparent width only Evidence · table > 0.58 Context: 9.14 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is true **Nearology Play** Polarity: neutral Definition: Value premise rests on proximity to a known deposit rather than own results. Why it applies: proximity is offered as the value premise: "The project has excellent infrastructure, being adjacent to a major highway and power corridor as well as a large water " ### NB-15-270 [Link to this fact](https://atlas-extractions.minestarters.com/news/corvus-gold-makes-new-nw-sierra-blanca-zone-discovery-700-metres-west-of-yellowj--4003eb1a-1e7e-41bb-951b-f9c2feec4280#fact-drill-facts-18) North Bullfrog · gold #### Identity - Hole ID: NB-15-270 - Project: North Bullfrog - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: KOR #### Geometry - Grade: 0.43 - Grade Unit: g/t - Intercept: 27.43 m - From: 82.3 m - To: 109.73 m - Intercept Depth: 45.72 m #### Classification - Program: exploration - Sample Type: drill - Group ID: NB-15-270:82.3-109.73 - Mining Method: open\_pit #### Location - Location: NW Sierra Blanca Zone - Loc. Source: document #### QA/QC - Laboratory: ALS Chemex - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Deleterious - Deleterious Flag: No #### Metal Equivalent - Assumptions Disclosed: No #### Compositing - Cutoff Grade: 0.1 - Cutoff Unit: g/t Au #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2015-11-03T00:00:00.000Z Reasoning: This intercept shows a good length but a weak gold grade, contributing to the overall discovery but not a high-grade highlight. - Positive factor: Part of a new discovery in an unexplored area - Positive factor: Good intercept length \(27.43m\) - Negative factor: Weak gold grade for an exploration intercept - Negative factor: Apparent width only Evidence · table > 0.43 Context: 27.43 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is true **Nearology Play** Polarity: neutral Definition: Value premise rests on proximity to a known deposit rather than own results. Why it applies: proximity is offered as the value premise: "The project has excellent infrastructure, being adjacent to a major highway and power corridor as well as a large water " ### NB-15-270 [Link to this fact](https://atlas-extractions.minestarters.com/news/corvus-gold-makes-new-nw-sierra-blanca-zone-discovery-700-metres-west-of-yellowj--4003eb1a-1e7e-41bb-951b-f9c2feec4280#fact-drill-facts-19) North Bullfrog · silver #### Identity - Hole ID: NB-15-270 - Project: North Bullfrog - Commodity: silver - Region: usa\_nv - Reported Region: usa\_nv - Ticker: KOR #### Geometry - Grade: 1.47 - Grade Unit: g/t - Intercept: 27.43 m - From: 82.3 m - To: 109.73 m - Intercept Depth: 45.72 m #### Classification - Program: exploration - Sample Type: drill - Group ID: NB-15-270:82.3-109.73 - Mining Method: open\_pit #### Location - Location: NW Sierra Blanca Zone - Loc. Source: document #### QA/QC - Laboratory: ALS Chemex - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Deleterious - Deleterious Flag: No #### Metal Equivalent - Assumptions Disclosed: No #### Compositing - Cutoff Grade: 0.1 - Cutoff Unit: g/t Au #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2015-11-03T00:00:00.000Z Reasoning: This intercept shows a low silver grade over a good length, contributing to the overall discovery but not a high-grade highlight. - Positive factor: Part of a new discovery in an unexplored area - Positive factor: Good intercept length \(27.43m\) - Negative factor: Low silver grade - Negative factor: Apparent width only Evidence · table > 1.47 Context: 27.43 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is true **Nearology Play** Polarity: neutral Definition: Value premise rests on proximity to a known deposit rather than own results. Why it applies: proximity is offered as the value premise: "The project has excellent infrastructure, being adjacent to a major highway and power corridor as well as a large water " ### NB-15-270 [Link to this fact](https://atlas-extractions.minestarters.com/news/corvus-gold-makes-new-nw-sierra-blanca-zone-discovery-700-metres-west-of-yellowj--4003eb1a-1e7e-41bb-951b-f9c2feec4280#fact-drill-facts-20) North Bullfrog · gold #### Identity - Hole ID: NB-15-270 - Project: North Bullfrog - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: KOR #### Geometry - Grade: 1.05 - Grade Unit: g/t - Intercept: 1.52 m - From: 85.34 m - To: 86.86 m - Intercept Depth: 45.72 m #### Classification - Program: exploration - Sample Type: drill - Group ID: NB-15-270:85.34-86.86 - Mining Method: open\_pit #### Location - Location: NW Sierra Blanca Zone - Loc. Source: document #### QA/QC - Laboratory: ALS Chemex - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Deleterious - Deleterious Flag: No #### Metal Equivalent - Assumptions Disclosed: No #### Compositing - Cutoff Grade: 1 - Cutoff Unit: g/t Au #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2015-11-03T00:00:00.000Z Reasoning: This sub-interval shows a moderate gold grade but is very narrow, limiting its individual materiality despite being part of a new discovery. - Positive factor: Part of a new discovery in an unexplored area - Positive factor: Moderate gold grade for an open pit target - Negative factor: Narrow intercept length - Negative factor: Apparent width only Evidence · table > 1.05 Context: 1.52 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is true **Nearology Play** Polarity: neutral Definition: Value premise rests on proximity to a known deposit rather than own results. Why it applies: proximity is offered as the value premise: "The project has excellent infrastructure, being adjacent to a major highway and power corridor as well as a large water " ### NB-15-270 [Link to this fact](https://atlas-extractions.minestarters.com/news/corvus-gold-makes-new-nw-sierra-blanca-zone-discovery-700-metres-west-of-yellowj--4003eb1a-1e7e-41bb-951b-f9c2feec4280#fact-drill-facts-21) North Bullfrog · silver #### Identity - Hole ID: NB-15-270 - Project: North Bullfrog - Commodity: silver - Region: usa\_nv - Reported Region: usa\_nv - Ticker: KOR #### Geometry - Grade: 1.02 - Grade Unit: g/t - Intercept: 1.52 m - From: 85.34 m - To: 86.86 m - Intercept Depth: 45.72 m #### Classification - Program: exploration - Sample Type: drill - Group ID: NB-15-270:85.34-86.86 - Mining Method: open\_pit #### Location - Location: NW Sierra Blanca Zone - Loc. Source: document #### QA/QC - Laboratory: ALS Chemex - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Deleterious - Deleterious Flag: No #### Metal Equivalent - Assumptions Disclosed: No #### Compositing - Cutoff Grade: 1 - Cutoff Unit: g/t Au #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2015-11-03T00:00:00.000Z Reasoning: This sub-interval shows a low silver grade over a narrow width, contributing minimally to overall materiality. - Positive factor: Part of a new discovery in an unexplored area - Negative factor: Low silver grade - Negative factor: Narrow intercept length - Negative factor: Apparent width only Evidence · table > 1.02 Context: 1.52 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is true **Nearology Play** Polarity: neutral Definition: Value premise rests on proximity to a known deposit rather than own results. Why it applies: proximity is offered as the value premise: "The project has excellent infrastructure, being adjacent to a major highway and power corridor as well as a large water " ### NB-15-270 [Link to this fact](https://atlas-extractions.minestarters.com/news/corvus-gold-makes-new-nw-sierra-blanca-zone-discovery-700-metres-west-of-yellowj--4003eb1a-1e7e-41bb-951b-f9c2feec4280#fact-drill-facts-22) North Bullfrog · gold #### Identity - Hole ID: NB-15-270 - Project: North Bullfrog - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: KOR #### Geometry - Grade: 0.29 - Grade Unit: g/t - Intercept: 25.91 m - From: 118.87 m - To: 144.78 m - Intercept Depth: 45.72 m #### Classification - Program: exploration - Sample Type: drill - Group ID: NB-15-270:118.87-144.78 - Mining Method: open\_pit #### Location - Location: NW Sierra Blanca Zone - Loc. Source: document #### QA/QC - Laboratory: ALS Chemex - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Deleterious - Deleterious Flag: No #### Metal Equivalent - Assumptions Disclosed: No #### Compositing - Cutoff Grade: 0.1 - Cutoff Unit: g/t Au #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2015-11-03T00:00:00.000Z Reasoning: This intercept shows a good length but a low gold grade, contributing to the overall discovery but not a high-grade highlight. - Positive factor: Part of a new discovery in an unexplored area - Positive factor: Good intercept length \(25.91m\) - Negative factor: Low gold grade - Negative factor: Apparent width only Evidence · table > 0.29 Context: 25.91 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is true **Nearology Play** Polarity: neutral Definition: Value premise rests on proximity to a known deposit rather than own results. Why it applies: proximity is offered as the value premise: "The project has excellent infrastructure, being adjacent to a major highway and power corridor as well as a large water " ### NB-15-270 [Link to this fact](https://atlas-extractions.minestarters.com/news/corvus-gold-makes-new-nw-sierra-blanca-zone-discovery-700-metres-west-of-yellowj--4003eb1a-1e7e-41bb-951b-f9c2feec4280#fact-drill-facts-23) North Bullfrog · silver #### Identity - Hole ID: NB-15-270 - Project: North Bullfrog - Commodity: silver - Region: usa\_nv - Reported Region: usa\_nv - Ticker: KOR #### Geometry - Grade: 0.59 - Grade Unit: g/t - Intercept: 25.91 m - From: 118.87 m - To: 144.78 m - Intercept Depth: 45.72 m #### Classification - Program: exploration - Sample Type: drill - Group ID: NB-15-270:118.87-144.78 - Mining Method: open\_pit #### Location - Location: NW Sierra Blanca Zone - Loc. Source: document #### QA/QC - Laboratory: ALS Chemex - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Deleterious - Deleterious Flag: No #### Metal Equivalent - Assumptions Disclosed: No #### Compositing - Cutoff Grade: 0.1 - Cutoff Unit: g/t Au #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2015-11-03T00:00:00.000Z Reasoning: This intercept shows a low silver grade over a good length, contributing to the overall discovery but not a high-grade highlight. - Positive factor: Part of a new discovery in an unexplored area - Positive factor: Good intercept length \(25.91m\) - Negative factor: Low silver grade - Negative factor: Apparent width only Evidence · table > 0.59 Context: 25.91 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is true **Nearology Play** Polarity: neutral Definition: Value premise rests on proximity to a known deposit rather than own results. Why it applies: proximity is offered as the value premise: "The project has excellent infrastructure, being adjacent to a major highway and power corridor as well as a large water " ## Resource Estimates (12) ### measured [Link to this fact](https://atlas-extractions.minestarters.com/news/corvus-gold-makes-new-nw-sierra-blanca-zone-discovery-700-metres-west-of-yellowj--4003eb1a-1e7e-41bb-951b-f9c2feec4280#fact-resource-facts-24) North Bullfrog Project · gold #### Identity - Project: North Bullfrog Project - Commodity: gold - Region: usa\_nv - Reported Region: Nevada - Ticker: KOR #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Jeffrey A. Pontius, Carl E. Brechtel - Resource group id: resource:887e56c52d3411a2ecdf - Material type: oxide - Ownership percent: 100 % - Resource basis: gross #### Resource Data - Category: measured - Tonnes: 3860000 - Grade: 2.55 - Grade Unit: g/t - Contained Metal: 316.5 - Contained Unit: koz - Cutoff Grade: 0.52 - Cutoff Unit: g/t Au #### Prior Estimate - Resource Date: 2015-06-16 #### Metal Equivalent - Assumptions Disclosed: No #### Lab - Laboratory: ALS Chemex #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2015-11-03T00:00:00.000Z Reasoning: This Measured resource for mill processing shows high confidence and a strong gold grade, contributing significantly to the project's overall value. - Positive factor: High confidence Measured category - Positive factor: High gold grade for open pit - Positive factor: NI 43-101 compliant - Positive factor: QP signed Evidence · text > measured mineral resource of 3.86 Mt at an average grade of 2.55 g/t gold and 19.70 g/t silver, containing 316.5k ounces of gold #### Tags used in scoring **Measured Resource** Polarity: positive Definition: Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves. Why it applies: category is "measured" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **PEA-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study. Why it applies: the release names the study this estimate supports **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### measured [Link to this fact](https://atlas-extractions.minestarters.com/news/corvus-gold-makes-new-nw-sierra-blanca-zone-discovery-700-metres-west-of-yellowj--4003eb1a-1e7e-41bb-951b-f9c2feec4280#fact-resource-facts-25) North Bullfrog Project · silver #### Identity - Project: North Bullfrog Project - Commodity: silver - Region: usa\_nv - Reported Region: Nevada - Ticker: KOR #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Jeffrey A. Pontius, Carl E. Brechtel - Resource group id: resource:887e56c52d3411a2ecdf - Material type: oxide - Ownership percent: 100 % - Resource basis: gross #### Resource Data - Category: measured - Tonnes: 3860000 - Grade: 19.7 - Grade Unit: g/t - Contained Metal: 2445 - Contained Unit: koz - Cutoff Grade: 0.52 - Cutoff Unit: g/t Au #### Prior Estimate - Resource Date: 2015-06-16 #### Metal Equivalent - Assumptions Disclosed: No #### Lab - Laboratory: ALS Chemex #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2015-11-03T00:00:00.000Z Reasoning: This Measured resource for mill processing includes a substantial silver component, adding to the project's overall value. - Positive factor: High confidence Measured category - Positive factor: NI 43-101 compliant - Positive factor: QP signed Evidence · text > 19.70 g/t silver, containing 2,445k ounces of silver #### Tags used in scoring **Measured Resource** Polarity: positive Definition: Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves. Why it applies: category is "measured" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **PEA-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study. Why it applies: the release names the study this estimate supports **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### indicated [Link to this fact](https://atlas-extractions.minestarters.com/news/corvus-gold-makes-new-nw-sierra-blanca-zone-discovery-700-metres-west-of-yellowj--4003eb1a-1e7e-41bb-951b-f9c2feec4280#fact-resource-facts-26) North Bullfrog Project · gold #### Identity - Project: North Bullfrog Project - Commodity: gold - Region: usa\_nv - Reported Region: Nevada - Ticker: KOR #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Jeffrey A. Pontius, Carl E. Brechtel - Resource group id: resource:7f3838bc63f684bc656c - Material type: oxide - Ownership percent: 100 % - Resource basis: gross #### Resource Data - Category: indicated - Tonnes: 1810000 - Grade: 1.53 - Grade Unit: g/t - Contained Metal: 89.1 - Contained Unit: koz - Cutoff Grade: 0.52 - Cutoff Unit: g/t Au #### Prior Estimate - Resource Date: 2015-06-16 #### Metal Equivalent - Assumptions Disclosed: No #### Lab - Laboratory: ALS Chemex #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2015-11-03T00:00:00.000Z Reasoning: This Indicated resource for mill processing shows good confidence and a strong gold grade, contributing significantly to the project's overall value. - Positive factor: Indicated category provides good confidence - Positive factor: Strong gold grade for open pit - Positive factor: NI 43-101 compliant - Positive factor: QP signed Evidence · text > indicated mineral resource of 1.81 Mt at an average grade of 1.53 g/t gold, and 10.20 g/t silver, containing 89.1k ounces of gold #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **PEA-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study. Why it applies: the release names the study this estimate supports **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### indicated [Link to this fact](https://atlas-extractions.minestarters.com/news/corvus-gold-makes-new-nw-sierra-blanca-zone-discovery-700-metres-west-of-yellowj--4003eb1a-1e7e-41bb-951b-f9c2feec4280#fact-resource-facts-27) North Bullfrog Project · silver #### Identity - Project: North Bullfrog Project - Commodity: silver - Region: usa\_nv - Reported Region: Nevada - Ticker: KOR #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Jeffrey A. Pontius, Carl E. Brechtel - Resource group id: resource:7f3838bc63f684bc656c - Material type: oxide - Ownership percent: 100 % - Resource basis: gross #### Resource Data - Category: indicated - Tonnes: 1810000 - Grade: 10.2 - Grade Unit: g/t - Contained Metal: 593.6 - Contained Unit: koz - Cutoff Grade: 0.52 - Cutoff Unit: g/t Au #### Prior Estimate - Resource Date: 2015-06-16 #### Metal Equivalent - Assumptions Disclosed: No #### Lab - Laboratory: ALS Chemex #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2015-11-03T00:00:00.000Z Reasoning: This Indicated resource for mill processing includes a notable silver component, adding to the project's overall value. - Positive factor: Indicated category provides good confidence - Positive factor: NI 43-101 compliant - Positive factor: QP signed Evidence · text > 10.20 g/t silver, containing 593.6k ounces of silver #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **PEA-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study. Why it applies: the release names the study this estimate supports **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### inferred [Link to this fact](https://atlas-extractions.minestarters.com/news/corvus-gold-makes-new-nw-sierra-blanca-zone-discovery-700-metres-west-of-yellowj--4003eb1a-1e7e-41bb-951b-f9c2feec4280#fact-resource-facts-28) North Bullfrog Project · gold #### Identity - Project: North Bullfrog Project - Commodity: gold - Region: usa\_nv - Reported Region: Nevada - Ticker: KOR #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Jeffrey A. Pontius, Carl E. Brechtel - Resource group id: resource:a52e374d48449116ee00 - Material type: oxide - Ownership percent: 100 % - Resource basis: gross #### Resource Data - Category: inferred - Tonnes: 1480000 - Grade: 0.83 - Grade Unit: g/t - Contained Metal: 39.5 - Contained Unit: koz - Cutoff Grade: 0.52 - Cutoff Unit: g/t Au #### Prior Estimate - Resource Date: 2015-06-16 #### Metal Equivalent - Assumptions Disclosed: No #### Lab - Laboratory: ALS Chemex #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2015-11-03T00:00:00.000Z Reasoning: This Inferred resource for mill processing provides exploration upside but has lower confidence due to its category. - Positive factor: NI 43-101 compliant - Positive factor: QP signed - Negative factor: Inferred category has lower confidence - Negative factor: Moderate gold grade for open pit Evidence · text > inferred resource of 1.48 Mt at an average grade of 0.83 g/t gold and 4.26 g/t silver, containing 39.5k ounces of gold #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **PEA-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study. Why it applies: the release names the study this estimate supports **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### inferred [Link to this fact](https://atlas-extractions.minestarters.com/news/corvus-gold-makes-new-nw-sierra-blanca-zone-discovery-700-metres-west-of-yellowj--4003eb1a-1e7e-41bb-951b-f9c2feec4280#fact-resource-facts-29) North Bullfrog Project · silver #### Identity - Project: North Bullfrog Project - Commodity: silver - Region: usa\_nv - Reported Region: Nevada - Ticker: KOR #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Jeffrey A. Pontius, Carl E. Brechtel - Resource group id: resource:a52e374d48449116ee00 - Material type: oxide - Ownership percent: 100 % - Resource basis: gross #### Resource Data - Category: inferred - Tonnes: 1480000 - Grade: 4.26 - Grade Unit: g/t - Contained Metal: 202.7 - Contained Unit: koz - Cutoff Grade: 0.52 - Cutoff Unit: g/t Au #### Prior Estimate - Resource Date: 2015-06-16 #### Metal Equivalent - Assumptions Disclosed: No #### Lab - Laboratory: ALS Chemex #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2015-11-03T00:00:00.000Z Reasoning: This Inferred resource for mill processing includes a silver component but has lower confidence due to its category and low grade. - Positive factor: NI 43-101 compliant - Positive factor: QP signed - Negative factor: Inferred category has lower confidence - Negative factor: Low silver grade Evidence · text > 4.26 g/t silver, containing 202.7k ounces of silver #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **PEA-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study. Why it applies: the release names the study this estimate supports **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### measured [Link to this fact](https://atlas-extractions.minestarters.com/news/corvus-gold-makes-new-nw-sierra-blanca-zone-discovery-700-metres-west-of-yellowj--4003eb1a-1e7e-41bb-951b-f9c2feec4280#fact-resource-facts-30) North Bullfrog Project · gold #### Identity - Project: North Bullfrog Project - Commodity: gold - Region: usa\_nv - Reported Region: Nevada - Ticker: KOR #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Jeffrey A. Pontius, Carl E. Brechtel - Resource group id: resource:29a91c844ecc413c082d - Material type: oxide - Ownership percent: 100 % - Resource basis: gross #### Resource Data - Category: measured - Tonnes: 300000 - Grade: 0.25 - Grade Unit: g/t - Contained Metal: 2.4 - Contained Unit: koz - Cutoff Grade: 0.15 - Cutoff Unit: g/t #### Prior Estimate - Resource Date: 2015-06-16 #### Metal Equivalent - Assumptions Disclosed: No #### Lab - Laboratory: ALS Chemex #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2015-11-03T00:00:00.000Z Reasoning: This Measured resource for heap leach processing has high confidence but a small tonnage and marginal gold grade. - Positive factor: High confidence Measured category - Positive factor: NI 43-101 compliant - Positive factor: QP signed - Negative factor: Marginal gold grade for open pit heap leach - Negative factor: Small tonnage Evidence · text > measured mineral resource of 0.3 Mt at an average grade of 0.25 g/t gold and 2.76 g/t silver, containing 2.4k ounces of gold #### Tags used in scoring **Measured Resource** Polarity: positive Definition: Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves. Why it applies: category is "measured" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **PEA-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study. Why it applies: the release names the study this estimate supports **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### measured [Link to this fact](https://atlas-extractions.minestarters.com/news/corvus-gold-makes-new-nw-sierra-blanca-zone-discovery-700-metres-west-of-yellowj--4003eb1a-1e7e-41bb-951b-f9c2feec4280#fact-resource-facts-31) North Bullfrog Project · silver #### Identity - Project: North Bullfrog Project - Commodity: silver - Region: usa\_nv - Reported Region: Nevada - Ticker: KOR #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Jeffrey A. Pontius, Carl E. Brechtel - Resource group id: resource:29a91c844ecc413c082d - Material type: oxide - Ownership percent: 100 % - Resource basis: gross #### Resource Data - Category: measured - Tonnes: 300000 - Grade: 2.76 - Grade Unit: g/t - Contained Metal: 26.6 - Contained Unit: koz - Cutoff Grade: 0.15 - Cutoff Unit: g/t #### Prior Estimate - Resource Date: 2015-06-16 #### Metal Equivalent - Assumptions Disclosed: No #### Lab - Laboratory: ALS Chemex #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2015-11-03T00:00:00.000Z Reasoning: This Measured resource for heap leach processing includes a silver component but has a small tonnage and low grade. - Positive factor: High confidence Measured category - Positive factor: NI 43-101 compliant - Positive factor: QP signed - Negative factor: Low silver grade - Negative factor: Small tonnage Evidence · text > 2.76 g/t silver, containing 26.6k ounces of silver #### Tags used in scoring **Measured Resource** Polarity: positive Definition: Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves. Why it applies: category is "measured" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **PEA-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study. Why it applies: the release names the study this estimate supports **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### indicated [Link to this fact](https://atlas-extractions.minestarters.com/news/corvus-gold-makes-new-nw-sierra-blanca-zone-discovery-700-metres-west-of-yellowj--4003eb1a-1e7e-41bb-951b-f9c2feec4280#fact-resource-facts-32) North Bullfrog Project · gold #### Identity - Project: North Bullfrog Project - Commodity: gold - Region: usa\_nv - Reported Region: Nevada - Ticker: KOR #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Jeffrey A. Pontius, Carl E. Brechtel - Resource group id: resource:8ea52fc71cc575c91c7e - Material type: oxide - Ownership percent: 100 % - Resource basis: gross #### Resource Data - Category: indicated - Tonnes: 22860000 - Grade: 0.3 - Grade Unit: g/t - Contained Metal: 220.5 - Contained Unit: koz - Cutoff Grade: 0.15 - Cutoff Unit: g/t #### Prior Estimate - Resource Date: 2015-06-16 #### Metal Equivalent - Assumptions Disclosed: No #### Lab - Laboratory: ALS Chemex #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2015-11-03T00:00:00.000Z Reasoning: This Indicated resource for heap leach processing provides good confidence but has a weak gold grade. - Positive factor: Indicated category provides good confidence - Positive factor: NI 43-101 compliant - Positive factor: QP signed - Negative factor: Weak gold grade for open pit heap leach Evidence · text > indicated mineral resource of 22.86 Mt at an average grade of 0.30 g/t gold and 0.43 g/t silver, containing 220.5k ounces of gold #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **PEA-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study. Why it applies: the release names the study this estimate supports **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### indicated [Link to this fact](https://atlas-extractions.minestarters.com/news/corvus-gold-makes-new-nw-sierra-blanca-zone-discovery-700-metres-west-of-yellowj--4003eb1a-1e7e-41bb-951b-f9c2feec4280#fact-resource-facts-33) North Bullfrog Project · silver #### Identity - Project: North Bullfrog Project - Commodity: silver - Region: usa\_nv - Reported Region: Nevada - Ticker: KOR #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Jeffrey A. Pontius, Carl E. Brechtel - Resource group id: resource:8ea52fc71cc575c91c7e - Material type: oxide - Ownership percent: 100 % - Resource basis: gross #### Resource Data - Category: indicated - Tonnes: 22860000 - Grade: 0.43 - Grade Unit: g/t - Contained Metal: 316.1 - Contained Unit: koz - Cutoff Grade: 0.15 - Cutoff Unit: g/t #### Prior Estimate - Resource Date: 2015-06-16 #### Metal Equivalent - Assumptions Disclosed: No #### Lab - Laboratory: ALS Chemex #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2015-11-03T00:00:00.000Z Reasoning: This Indicated resource for heap leach processing includes a silver component but has a very low grade. - Positive factor: Indicated category provides good confidence - Positive factor: NI 43-101 compliant - Positive factor: QP signed - Negative factor: Very low silver grade Evidence · text > 0.43 g/t silver, containing 316.1k ounces of silver #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **PEA-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study. Why it applies: the release names the study this estimate supports **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### inferred [Link to this fact](https://atlas-extractions.minestarters.com/news/corvus-gold-makes-new-nw-sierra-blanca-zone-discovery-700-metres-west-of-yellowj--4003eb1a-1e7e-41bb-951b-f9c2feec4280#fact-resource-facts-34) North Bullfrog Project · gold #### Identity - Project: North Bullfrog Project - Commodity: gold - Region: usa\_nv - Reported Region: Nevada - Ticker: KOR #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Jeffrey A. Pontius, Carl E. Brechtel - Resource group id: resource:a9dc80dcbf3b9e9af88c - Material type: oxide - Ownership percent: 100 % - Resource basis: gross #### Resource Data - Category: inferred - Tonnes: 176300000 - Grade: 0.19 - Grade Unit: g/t - Contained Metal: 1077.4 - Contained Unit: koz - Cutoff Grade: 0.15 - Cutoff Unit: g/t #### Prior Estimate - Resource Date: 2015-06-16 #### Metal Equivalent - Assumptions Disclosed: No #### Lab - Laboratory: ALS Chemex #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2015-11-03T00:00:00.000Z Reasoning: This large Inferred resource for heap leach processing provides significant exploration upside but has lower confidence and marginal gold grade. - Positive factor: Large tonnage - Positive factor: NI 43-101 compliant - Positive factor: QP signed - Negative factor: Inferred category has lower confidence - Negative factor: Marginal gold grade for open pit heap leach Evidence · text > inferred mineral resource of 176.3 Mt at an average grade of 0.19 g/t gold and 0.67 g/t silver, containing 1,077.4k ounces of gold #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **PEA-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study. Why it applies: the release names the study this estimate supports **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### inferred [Link to this fact](https://atlas-extractions.minestarters.com/news/corvus-gold-makes-new-nw-sierra-blanca-zone-discovery-700-metres-west-of-yellowj--4003eb1a-1e7e-41bb-951b-f9c2feec4280#fact-resource-facts-35) North Bullfrog Project · silver #### Identity - Project: North Bullfrog Project - Commodity: silver - Region: usa\_nv - Reported Region: Nevada - Ticker: KOR #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Jeffrey A. Pontius, Carl E. Brechtel - Resource group id: resource:a9dc80dcbf3b9e9af88c - Material type: oxide - Ownership percent: 100 % - Resource basis: gross #### Resource Data - Category: inferred - Tonnes: 176300000 - Grade: 0.67 - Grade Unit: g/t - Contained Metal: 3799.2 - Contained Unit: koz - Cutoff Grade: 0.15 - Cutoff Unit: g/t #### Prior Estimate - Resource Date: 2015-06-16 #### Metal Equivalent - Assumptions Disclosed: No #### Lab - Laboratory: ALS Chemex #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2015-11-03T00:00:00.000Z Reasoning: This large Inferred resource for heap leach processing includes a silver component but has lower confidence and a very low grade. - Positive factor: Large tonnage - Positive factor: NI 43-101 compliant - Positive factor: QP signed - Negative factor: Inferred category has lower confidence - Negative factor: Very low silver grade Evidence · text > 0.67 g/t silver, containing 3,799.2k ounces of silver #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **PEA-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study. Why it applies: the release names the study this estimate supports **PFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ## How Atlas produces this analysis Minestarters Atlas uses automated extraction to summarize mining announcements, identify reported measurements, and classify supporting evidence. Sentiment reflects the extracted narrative and classification rules; it is an interpretation, not a reported measurement. Evidence quotes and context are provided where available. Missing data, low-confidence results, and review flags indicate limitations. Check the original publisher announcement before relying on an interpretation.