# SONORO FILES UPDATED PRELIMINARY ECONOMIC ASSESSMENT FOR THE CERRO CALICHE PROJECT Canonical Atlas analysis: https://atlas-extractions.minestarters.com/news/sonoro-files-updated-preliminary-economic-assessment-for-the-cerro-caliche-proje--fd91bb26-080d-4d47-9524-c5b135f59040 Original source: https://money.tmx.com/en/quote/SGO/news/7108977748587335/sonoro-files-updated-preliminary-economic-assessment-for-the-cerro-caliche-proje Publisher: tmx Original announcement: 2026-04-15T12:00:00.000Z Analysis by Minestarters Atlas Atlas analysis published: Unknown date Atlas analysis updated: Unknown date - Company: Sonoro Gold Corp. - Ticker: SGO - Exchange: TSX - Region: Sonora, Mexico - Primary commodity: Gold - Secondary commodities: Silver - Document categories: Metallurgy, Resource update - Extracted: 2026-09-14 22:51:25 UTC Narrative sentiment: 0.60 · Bullish ## Minestarters Atlas summary Sonoro Gold Corp. has released an updated Preliminary Economic Assessment \(PEA\) for the Cerro Caliche Gold Project in Mexico. The PEA indicates a 10-year open pit heap leach operation with a pre-tax NPV8 of $360 million and an IRR of 65%, based on 459 koz of gold equivalent production. Reasoning: The updated PEA presents a robust economic case for the Cerro Caliche project with high IRR and NPV, but the geological confidence is limited by the reliance on Inferred resources. - Positive factor: Strong economic indicators with $360M Pre-Tax NPV8 and 65% IRR - Positive factor: Short payback period of 1.7 years - Positive factor: Significant gold equivalent production of 459 koz over 10 years - Negative factor: Resource is primarily Inferred, which is considered too speculative for reserves - Negative factor: Gold recovery \(72%\) is relatively low for a mill route, though consistent with heap leach - Negative factor: Silver recovery is quite low at 27% Facts used in scoring: 2 ## Classification and evidence **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: The PEA explicitly states that it includes Inferred Mineral Resources that are considered too speculative for reserves. Evidence · text > includes Inferred Mineral Resources that are considered too speculative to have the economic considerations applied to them **Heap Leach Route** Polarity: neutral Definition: Processing via heap leach — lower CAPEX and OPEX, lower recovery expected. Why it applies: The PEA outlines an open pit, heap leach mining operation. Evidence · text > open pit, heap leach mining operation **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: The technical report was prepared in accordance with NI 43-101 requirements. Evidence · text > prepared in accordance with the requirements of National Instrument 43-101 **Single Domain Only** Polarity: negative Definition: Testing limited to one composite or domain — representativeness not established. Why it applies: only one composite was tested ## Extracted facts Stored fact records: 2. Some facts used in scoring do not have a stored record. ## Metallurgical Results (2) ### Fact 1 [Link to this fact](https://atlas-extractions.minestarters.com/news/sonoro-files-updated-preliminary-economic-assessment-for-the-cerro-caliche-proje--fd91bb26-080d-4d47-9524-c5b135f59040#fact-metallurgical-facts-0) Cerro Caliche · gold #### Identity - Project: Cerro Caliche - Commodity: gold - Region: mexico - Reported Region: Sonora, Mexico - Ticker: SGO #### Test Work - Program Status: preliminary - Sample: PEA Gold recovery #### Recovery - Recovery: 72 % - Recovery Basis: unspecified #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-15T00:00:00.000Z Reasoning: 72% recovery is typical for heap leach operations. Evidence · text > Gold recovery of 72% #### Tags used in scoring **Low Recovery** Polarity: negative Definition: Recovery below the weak band for the commodity and processing route. Why it applies: 72% is below the weak band \(80%\) ### Fact 2 [Link to this fact](https://atlas-extractions.minestarters.com/news/sonoro-files-updated-preliminary-economic-assessment-for-the-cerro-caliche-proje--fd91bb26-080d-4d47-9524-c5b135f59040#fact-metallurgical-facts-1) Cerro Caliche · silver #### Identity - Project: Cerro Caliche - Commodity: silver - Region: mexico - Reported Region: Sonora, Mexico - Ticker: SGO #### Test Work - Program Status: preliminary - Sample: PEA Silver recovery #### Recovery - Recovery: 27 % - Recovery Basis: unspecified #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-04-15T00:00:00.000Z Reasoning: 27% recovery is relatively low. - Negative factor: Low silver recovery Evidence · text > silver recovery of 27% #### Tags used in scoring **Low Recovery** Polarity: negative Definition: Recovery below the weak band for the commodity and processing route. Why it applies: 27% is below the weak band \(75%\) ## 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.