# Inside the Grade Gap Between Brimstone and Vortex

Canonical Atlas analysis: https://atlas-staging.minestarters.com/news/inside-the-grade-gap-between-brimstone-and-vortex--ffa4bf90-7f8d-456d-a7ff-fed3da7d4567

Original source: https://www.cruxinvestor.com/posts/inside-the-grade-gap-between-brimstone-and-vortex

Publisher: cruxinvestor

Original announcement: 2026-08-14T00:00:00.000Z

Analysis by Minestarters Atlas

Atlas analysis published: Unknown date

Atlas analysis updated: Unknown date

- Company: Hycroft Mining Holding Corporation

- Ticker: HYMC

- Exchange: Unavailable

- Region: Nevada

- Primary commodity: Silver

- Secondary commodities: Gold

- Document categories: Resource update

- Extracted: 2026-08-20 17:37:40 UTC

Narrative sentiment: 0.40 · Bullish

## Minestarters Atlas summary

Hycroft Mining's northern Nevada deposit contains two high-grade silver systems, Brimstone and Vortex, which sit within a larger 1.53 billion tonne gold-silver resource. Brimstone is characterized by higher silver grades and depth-related exploration potential, while Vortex offers higher gold grades and lateral expansion opportunities to the west.

Reasoning: The document details a significant high-grade silver resource split into two domains \(Brimstone and Vortex\) within a much larger low-grade system, highlighting high-grade potential but noting exploration risks.

- Positive factor: high-grade silver domains

- Positive factor: significant contained metal

- Positive factor: expansion potential

- Negative factor: large inferred component in broader resource

- Negative factor: depth and lateral exploration risks

Facts used in scoring: 9

## Classification and evidence

**Maiden Resource**

Polarity: neutral

Definition: First formal MRE for the project — establishes baseline but typically exploration-stage with high Inferred component.

Why it applies: The article discusses the 2026 resource estimate as a key driver, though it doesn't explicitly call it 'maiden', it establishes the baseline for the high-grade domains.

Evidence · text

> its 2026 resource estimate, effective January 21, 2026

**Inferred Resource**

Polarity: negative

Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.

Why it applies: Significant portions of the resource, including the Vortex expansion and the broader envelope, are classified as Inferred.

Evidence · text

> with a further 5.0 million ounces of gold and 132.8 million ounces of silver classified as 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: The high-grade domains are reported at a specific cutoff of 68.57 g/t silver.

Evidence · text

> isolates the high-grade silver-bearing domains at a cutoff of 68.57 g/t silver.

## Extracted facts

Stored fact records: 9. Some facts used in scoring do not have a stored record.

## Resource Estimates (9)

### indicated

[Link to this fact](https://atlas-staging.minestarters.com/news/inside-the-grade-gap-between-brimstone-and-vortex--ffa4bf90-7f8d-456d-a7ff-fed3da7d4567#fact-resource-facts-0)

silver

#### Identity

- Commodity: silver
- Ticker: HYMC

#### Resource Data

- Category: indicated
- Tonnes: 3200000
- Grade: 269.54
- Grade Unit: g/t

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-08-14T00:00:00.000Z

Reasoning: High-grade silver intercept within the Brimstone domain.

- Positive factor: exceptional silver grade

Evidence · text

> Brimstone holds 3.2 million tonnes measured and indicated, grading 269.54 grams per tonne \(g/t\) silver.

### indicated

[Link to this fact](https://atlas-staging.minestarters.com/news/inside-the-grade-gap-between-brimstone-and-vortex--ffa4bf90-7f8d-456d-a7ff-fed3da7d4567#fact-resource-facts-1)

gold

#### Identity

- Commodity: gold
- Ticker: HYMC

#### Resource Data

- Category: indicated
- Tonnes: 3200000
- Grade: 0.368
- Grade Unit: g/t

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-08-14T00:00:00.000Z

Reasoning: Gold grade associated with the Brimstone silver domain.

Evidence · text

> Brimstone carries 3.2 million tonnes measured and indicated , grading 0.368 g/t gold and 269.54 g/t silver

### indicated

[Link to this fact](https://atlas-staging.minestarters.com/news/inside-the-grade-gap-between-brimstone-and-vortex--ffa4bf90-7f8d-456d-a7ff-fed3da7d4567#fact-resource-facts-2)

silver

#### Identity

- Commodity: silver
- Ticker: HYMC

#### Resource Data

- Category: indicated
- Tonnes: 14900000
- Grade: 130.14
- Grade Unit: g/t

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-08-14T00:00:00.000Z

Reasoning: Silver grade for the Vortex domain.

- Positive factor: strong silver grade

Evidence · text

> Vortex holds 14.9 million tonnes on the same basis, grading 130.14 g/t silver and 0.543 g/t gold.

### indicated

[Link to this fact](https://atlas-staging.minestarters.com/news/inside-the-grade-gap-between-brimstone-and-vortex--ffa4bf90-7f8d-456d-a7ff-fed3da7d4567#fact-resource-facts-3)

gold

#### Identity

- Commodity: gold
- Ticker: HYMC

#### Resource Data

- Category: indicated
- Tonnes: 14900000
- Grade: 0.543
- Grade Unit: g/t

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-08-14T00:00:00.000Z

Reasoning: Gold grade for the Vortex domain.

Evidence · text

> Vortex holds 14.9 million tonnes on the same basis, grading 130.14 g/t silver and 0.543 g/t gold.

### inferred

[Link to this fact](https://atlas-staging.minestarters.com/news/inside-the-grade-gap-between-brimstone-and-vortex--ffa4bf90-7f8d-456d-a7ff-fed3da7d4567#fact-resource-facts-4)

silver

#### Identity

- Commodity: silver
- Ticker: HYMC

#### Resource Data

- Category: inferred
- Tonnes: 3300000
- Grade: 125.2
- Grade Unit: g/t

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-08-14T00:00:00.000Z

Reasoning: Inferred silver resource for Vortex.

- Negative factor: inferred category

Evidence · text

> Vortex adds 3.3 million tonnes of inferred material grading 0.475 g/t gold and 125.20 g/t silver.

### inferred

[Link to this fact](https://atlas-staging.minestarters.com/news/inside-the-grade-gap-between-brimstone-and-vortex--ffa4bf90-7f8d-456d-a7ff-fed3da7d4567#fact-resource-facts-5)

gold

#### Identity

- Commodity: gold
- Ticker: HYMC

#### Resource Data

- Category: inferred
- Tonnes: 3300000
- Grade: 0.475
- Grade Unit: g/t

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-08-14T00:00:00.000Z

Reasoning: Inferred gold resource for Vortex.

- Negative factor: inferred category

Evidence · text

> Vortex adds 3.3 million tonnes of inferred material grading 0.475 g/t gold and 125.20 g/t silver.

### inferred

[Link to this fact](https://atlas-staging.minestarters.com/news/inside-the-grade-gap-between-brimstone-and-vortex--ffa4bf90-7f8d-456d-a7ff-fed3da7d4567#fact-resource-facts-6)

silver

#### Identity

- Commodity: silver
- Ticker: HYMC

#### Resource Data

- Category: inferred
- Tonnes: 13000

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-08-14T00:00:00.000Z

Reasoning: Inferred tonnage for Brimstone mentioned without specific grade.

Evidence · text

> Brimstone adds 13,000 tonnes.

### indicated

[Link to this fact](https://atlas-staging.minestarters.com/news/inside-the-grade-gap-between-brimstone-and-vortex--ffa4bf90-7f8d-456d-a7ff-fed3da7d4567#fact-resource-facts-7)

gold

#### Identity

- Commodity: gold
- Ticker: HYMC

#### Resource Data

- Category: indicated
- Tonnes: 1530000000
- Grade: 0.333
- Grade Unit: g/t

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-08-14T00:00:00.000Z

Reasoning: Broad low-grade gold resource.

Evidence · text

> carries 1.53 billion tonnes at 0.333 grams per tonne \(g/t\) gold

### indicated

[Link to this fact](https://atlas-staging.minestarters.com/news/inside-the-grade-gap-between-brimstone-and-vortex--ffa4bf90-7f8d-456d-a7ff-fed3da7d4567#fact-resource-facts-8)

silver

#### Identity

- Commodity: silver
- Ticker: HYMC

#### Resource Data

- Category: indicated
- Tonnes: 1530000000
- Grade: 11.42
- Grade Unit: g/t

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-08-14T00:00:00.000Z

Reasoning: Broad low-grade silver resource.

Evidence · text

> 1.53 billion tonnes at 0.333 grams per tonne \(g/t\) gold and 11.42 g/t silver

## 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.