# Rockhaven Announces Improved Metallurgical Test Work Results on its Klaza Project, Yukon

Canonical Atlas analysis: https://atlas-extractions.minestarters.com/news/rockhaven-announces-improved-metallurgical-test-work-results-on-its-klaza-projec--57928f79-43d9-45fc-967d-c04c3a90c73d

Original source: https://money.tmx.com/en/quote/RK/news/5481264308661905/rockhaven-announces-improved-metallurgical-test-work-results-on-its-klaza-projec

Publisher: tmx

Original announcement: 2024-05-06T12:05:00.000Z

Analysis by Minestarters Atlas

Atlas analysis published: Unknown date

Atlas analysis updated: Unknown date

- Company: Rockhaven Resources Ltd.

- Ticker: RK

- Exchange: TSX

- Region: Yukon

- Primary commodity: Gold

- Secondary commodities: Silver, Lead, Zinc, Arsenic

- Document categories: Metallurgy

- Extracted: 2026-09-18 19:06:26 UTC

Narrative sentiment: 0.80 · Bullish

## Minestarters Atlas summary

Rockhaven has reported improved metallurgical results for the Klaza Project, demonstrating that a conventional flotation flowsheet can produce marketable concentrates for gold, silver, lead, zinc, and arsenopyrite. This optimized flowsheet eliminates the need for costly on-site pressure oxidation and is supported by successful dense media separation \(DMS\) pre-concentration test work.

Reasoning: The results demonstrate a significant flowsheet optimization that moves the project from a high-cost hydrometallurgical route to a conventional flotation route, substantially de-risking the economics.

- Positive factor: Elimination of on-site pressure oxidation \(POX\) reduces CAPEX/OPEX/permitting risk

- Positive factor: High metal recoveries achieved via conventional flotation

- Positive factor: DMS pre-concentration offers potential for lower cut-off grades and reduced tailings

- Positive factor: Marketable arsenopyrite concentrate identified for refractory gold

- Negative factor: Arsenic-rich concentrate attracts smelter penalties/fees

Facts used in scoring: 8

## Classification and evidence

**Mill Route**

Polarity: neutral

Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\).

Why it applies: Test work utilized conventional flotation and dense media separation \(DMS\).

Evidence · text

> Gold recoveries of 82% and silver recoveries of 85% were obtained using conventional flotation

**High Recovery**

Polarity: positive

Definition: Recovery at or above the exceptional band for the commodity and processing route.

Why it applies: Gold and silver recoveries in DMS and flotation are in the strong to exceptional bands for the respective routes.

Evidence · text

> Gold recoveries of 82% and silver recoveries of 85% were obtained using conventional flotation

**Refractory Ore**

Polarity: negative

Definition: Ore requires oxidation/pressure treatment before recovery — a processing and recovery risk.

Why it applies: The presence of refractory gold in arsenopyrite is explicitly noted, though a marketable concentrate was found.

Evidence · text

> Refractory Gold Flotation... high-grade and marketable arsenopyrite concentrate containing most of the refractory gold.

**QA/QC Disclosed**

Polarity: positive

Story-specific tag

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: Technical information was approved by independent Qualified Persons \(Chris Martin and Matthew R. Dumala\).

Evidence · text

> Technical information related to the metallurgical test program were provided and approved by Chris Martin, C.Eng. an independent consultant and qualified person

**Gravity Route**

Polarity: neutral

Definition: Gravity separation forms a material part of the flowsheet.

Why it applies: the document describes a gravity route \("gravity"\)

**POX/BIOX Route**

Polarity: neutral

Definition: Pressure or bio-oxidation for refractory ore — high CAPEX and OPEX.

Why it applies: the document describes a pox\_biox route \("pressure oxidation"\)

**Multi-Domain Tested**

Polarity: positive

Definition: Variability across ore domains \(oxide, transition, fresh\) has been addressed.

Why it applies: 3 distinct composites were tested

## Extracted facts

Stored fact records: 8. Some facts used in scoring do not have a stored record.

## Metallurgical Results (8)

### Fact 1

[Link to this fact](https://atlas-extractions.minestarters.com/news/rockhaven-announces-improved-metallurgical-test-work-results-on-its-klaza-projec--57928f79-43d9-45fc-967d-c04c3a90c73d#fact-metallurgical-facts-0)

gold

#### Identity

- Commodity: gold
- Region: canada\_yt
- Reported Region: Yukon
- Ticker: RK

#### Test Work

- Sample: Master Composite-1 \(MC-1\) cleaned lead concentrate

#### Recovery

- Recovery: 32 %
- Conc. Grade: 210
- Conc. Grade Unit: g/t

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2024-05-06T00:00:00.000Z

Reasoning: High grade gold in lead concentrate.

- Positive factor: High grade concentrate

Evidence · table

> 210

Context: 0.9

#### Tags used in scoring

**Low Recovery**

Polarity: negative

Definition: Recovery below the weak band for the commodity and processing route.

Why it applies: 32% is below the weak band \(80%\)

### Fact 2

[Link to this fact](https://atlas-extractions.minestarters.com/news/rockhaven-announces-improved-metallurgical-test-work-results-on-its-klaza-projec--57928f79-43d9-45fc-967d-c04c3a90c73d#fact-metallurgical-facts-1)

silver

#### Identity

- Commodity: silver
- Region: canada\_yt
- Reported Region: Yukon
- Ticker: RK

#### Test Work

- Sample: Master Composite-1 \(MC-1\) cleaned lead concentrate

#### Recovery

- Recovery: 57 %
- Conc. Grade: 4997
- Conc. Grade Unit: g/t

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2024-05-06T00:00:00.000Z

Reasoning: Exceptional silver grade in lead concentrate.

- Positive factor: Very high silver grade

Evidence · table

> 4,997

Context: 0.9

#### Tags used in scoring

**Low Recovery**

Polarity: negative

Definition: Recovery below the weak band for the commodity and processing route.

Why it applies: 57% is below the weak band \(75%\)

### Fact 3

[Link to this fact](https://atlas-extractions.minestarters.com/news/rockhaven-announces-improved-metallurgical-test-work-results-on-its-klaza-projec--57928f79-43d9-45fc-967d-c04c3a90c73d#fact-metallurgical-facts-2)

lead

#### Identity

- Commodity: lead
- Region: canada\_yt
- Reported Region: Yukon
- Ticker: RK

#### Test Work

- Sample: Master Composite-1 \(MC-1\) cleaned lead concentrate

#### Recovery

- Recovery: 83 %
- Conc. Grade: 61.6
- Conc. Grade Unit: %

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2024-05-06T00:00:00.000Z

Reasoning: Strong lead grade in concentrate.

- Positive factor: Strong lead grade

Evidence · table

> 61.6

Context: 0.9

### Fact 4

[Link to this fact](https://atlas-extractions.minestarters.com/news/rockhaven-announces-improved-metallurgical-test-work-results-on-its-klaza-projec--57928f79-43d9-45fc-967d-c04c3a90c73d#fact-metallurgical-facts-3)

gold

#### Identity

- Commodity: gold
- Region: canada\_yt
- Reported Region: Yukon
- Ticker: RK

#### Test Work

- Sample: Master Composite-1 \(MC-1\) cleaned arsenopyrite concentrate

#### Recovery

- Recovery: 44 %
- Conc. Grade: 112
- Conc. Grade Unit: g/t

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2024-05-06T00:00:00.000Z

Reasoning: High grade gold in arsenopyrite concentrate provides a way to avoid POX.

- Positive factor: High grade arsenopyrite concentrate

- Negative factor: Arsenic penalties

Evidence · table

> 112

Context: 2.2

#### Tags used in scoring

**Low Recovery**

Polarity: negative

Definition: Recovery below the weak band for the commodity and processing route.

Why it applies: 44% is below the weak band \(80%\)

### Fact 5

[Link to this fact](https://atlas-extractions.minestarters.com/news/rockhaven-announces-improved-metallurgical-test-work-results-on-its-klaza-projec--57928f79-43d9-45fc-967d-c04c3a90c73d#fact-metallurgical-facts-4)

gold

#### Identity

- Commodity: gold
- Region: canada\_yt
- Reported Region: Yukon
- Ticker: RK

#### Test Work

- Sample: Western BRX DMS test

#### Recovery

- Recovery: 99 %
- Head Grade: 7.9
- Head Grade Unit: g/t
- Mass Pull: 50 %

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2024-05-06T00:00:00.000Z

Reasoning: Very high gold recovery via DMS.

- Positive factor: Exceptional recovery

Evidence · table

> 99.0

Context: 32

#### Tags used in scoring

**High Recovery**

Polarity: positive

Definition: Recovery at or above the exceptional band for the commodity and processing route.

Why it applies: 99% is at or above the exceptional band \(95%\)

### Fact 6

[Link to this fact](https://atlas-extractions.minestarters.com/news/rockhaven-announces-improved-metallurgical-test-work-results-on-its-klaza-projec--57928f79-43d9-45fc-967d-c04c3a90c73d#fact-metallurgical-facts-5)

silver

#### Identity

- Commodity: silver
- Region: canada\_yt
- Reported Region: Yukon
- Ticker: RK

#### Test Work

- Sample: Western BRX DMS test

#### Recovery

- Recovery: 98.4 %
- Head Grade: 92.2
- Head Grade Unit: g/t
- Mass Pull: 50 %

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2024-05-06T00:00:00.000Z

Reasoning: High silver recovery via DMS.

- Positive factor: High silver recovery

Evidence · table

> 98.4

Context: 32

#### Tags used in scoring

**High Recovery**

Polarity: positive

Definition: Recovery at or above the exceptional band for the commodity and processing route.

Why it applies: 98.4% is at or above the exceptional band \(90%\)

### Fact 7

[Link to this fact](https://atlas-extractions.minestarters.com/news/rockhaven-announces-improved-metallurgical-test-work-results-on-its-klaza-projec--57928f79-43d9-45fc-967d-c04c3a90c73d#fact-metallurgical-facts-6)

gold

#### Identity

- Commodity: gold
- Region: canada\_yt
- Reported Region: Yukon
- Ticker: RK

#### Test Work

- Sample: Central Klaza DMS test

#### Recovery

- Recovery: 97.7 %
- Head Grade: 5
- Head Grade Unit: g/t
- Mass Pull: 50 %

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2024-05-06T00:00:00.000Z

Reasoning: High gold recovery via DMS.

- Positive factor: High gold recovery

Evidence · table

> 97.7

Context: 38

#### Tags used in scoring

**High Recovery**

Polarity: positive

Definition: Recovery at or above the exceptional band for the commodity and processing route.

Why it applies: 97.7% is at or above the exceptional band \(95%\)

### Fact 8

[Link to this fact](https://atlas-extractions.minestarters.com/news/rockhaven-announces-improved-metallurgical-test-work-results-on-its-klaza-projec--57928f79-43d9-45fc-967d-c04c3a90c73d#fact-metallurgical-facts-7)

gold

#### Identity

- Commodity: gold
- Region: canada\_yt
- Reported Region: Yukon
- Ticker: RK

#### Test Work

- Sample: Western Klaza DMS test

#### Recovery

- Recovery: 78.9 %
- Head Grade: 1.7
- Head Grade Unit: g/t
- Mass Pull: 32.8 %

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2024-05-06T00:00:00.000Z

Reasoning: Lower gold recovery in Western Klaza zone.

- Negative factor: Lower recovery compared to other zones

Evidence · table

> 78.9

Context: 11

#### Tags used in scoring

**Low Recovery**

Polarity: negative

Definition: Recovery below the weak band for the commodity and processing route.

Why it applies: 78.9% is below the weak band \(80%\)

## 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.