# Thunder Mountain Gold, Inc. Updated 43-101 Mineral Resource Estimate at South Mountain Shows Significant Increase

Canonical Atlas analysis: https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df

Original source: https://money.tmx.com/en/quote/THM/news/7475487017530621/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun

Publisher: tmx

Original announcement: 2023-12-21T14:01:00.000Z

Analysis by Minestarters Atlas

Atlas analysis published: Unknown date

Atlas analysis updated: Unknown date

- Company: Thunder Mountain Gold, Inc.

- Ticker: THM

- Exchange: TSX

- Region: Idaho, U.S.A.

- Primary commodity: Zinc

- Secondary commodities: Silver, Gold, Copper, Lead

- Document categories: Resource update

- Extracted: 2026-08-22 15:10:09 UTC

Narrative sentiment: 0.80 · Bullish

## Minestarters Atlas summary

Thunder Mountain Gold, Inc. has announced an updated NI 43-101 Mineral Resource Estimate for its South Mountain Project in Idaho, effective October 16, 2023. The update shows a 7.7% increase in Measured & Indicated tonnage and a 15.1% increase in Inferred tonnage, incorporating new drilling results from 2021. The resource maintains high-grade mineralization across multiple commodities, with detailed assumptions for metallurgical recoveries and an underground mining cut-off grade.

Reasoning: Thunder Mountain Gold has reported a significant update to its South Mountain Mineral Resource Estimate, showing a 7.7% increase in Measured & Indicated tonnage and a 15.1% increase in Inferred tonnage, with corresponding increases in contained metal for zinc, silver, gold, and copper. The estimate is NI 43-101 compliant and includes detailed metallurgical and economic assumptions.

- Positive factor: significant\_tonnage\_increase

- Positive factor: category\_upgrade

- Positive factor: contained\_metal\_growth

- Positive factor: high\_confidence\_reporting

Facts used in scoring: 54

## Classification and evidence

**NI 43-101 Compliant**

Polarity: positive

Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard.

Why it applies: The updated 43-101 MRE was prepared in accordance with National Instrument 43-101 Standards of Disclosure for Mineral Projects.

Evidence · text

> prepared in accordance with National Instrument 43-101 Standards of Disclosure for Mineral Projects \("NI-43-101"\)

**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: Mr. Richard A. Schwering, SME-RM, P.G., of Hard Rock Consulting, LLC. is identified as the Qualified Person for the estimate.

Evidence · text

> The QP for the estimate Mr. Richard A. Schwering, SME-RM, P.G., of Hard Rock Consulting, LLC. is independent of South Mountain Mining, LLC.

**Category Upgrade**

Polarity: positive

Definition: Resource confidence improved — Inferred upgraded to Indicated, or Indicated to Measured. De-risking signal.

Why it applies: The Measured & Indicated tonnage increased by 7.7% from the previous estimate.

Evidence · text

> 7.7% increase to the Measured & Indicated tonnage

**Tonnage Growth**

Polarity: positive

Definition: Significant tonnage increase \(≥15%\) vs prior estimate with grade maintained or improved.

Why it applies: The Inferred tonnage increased by 15.1% from the previous estimate.

Evidence · text

> 15.1% increase in the Inferred tonnage

**Contained Metal Growth**

Polarity: positive

Definition: True scale improvement — contained metal ounces/tonnes increased vs prior, accounting for both tonnage and grade changes.

Why it applies: The update includes a significant increase in contained zinc, silver, gold, and copper.

Evidence · text

> significant increase in zinc, silver, gold, and copper.

**Resource Update**

Polarity: neutral

Definition: Revised estimate for an existing resource — compare to prior to assess progress.

Why it applies: The document reports an 'Updated 43-101 Mineral Resource Estimate'.

Evidence · text

> Updated 43-101 Mineral Resource Estimate

**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 mineral resource is reported at an underground mining cut-off of $97.50 U.S. Net Smelter Return \('NSR'\).

Evidence · text

> The mineral resource is reported at an underground mining cut-off of $97.50 U.S. Net Smelter Return \("NSR"\)

**Inferred Resource**

Polarity: negative

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

Why it applies: A substantial portion of the resource, 959,000 tons, is classified as Inferred.

Evidence · table

> 959,000

Context: Short Tons

## Extracted facts

Stored fact records: 54. Some facts used in scoring do not have a stored record.

## Resource Estimates (54)

### measured

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-0)

South Mountain Project · zinc

#### Identity

- Project: South Mountain Project
- Commodity: zinc
- Ticker: THM

#### Resource Data

- Category: measured
- Tonnes: 48987.99
- Grade: 11.51
- Grade Unit: %
- Contained Metal: 5579.19
- Contained Unit: tonnes
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: High-grade zinc in the Measured category for the Massive Sulfide domain, contributing to overall resource growth.

- Positive factor: high\_grade

- Positive factor: measured\_resource

Evidence · table

> 11.51

Context: 54,000

### measured

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-1)

South Mountain Project · silver

#### Identity

- Project: South Mountain Project
- Commodity: silver
- Ticker: THM

#### Resource Data

- Category: measured
- Tonnes: 48987.99
- Grade: 3.62
- Grade Unit: t. oz/ sh. Ton
- Contained Metal: 194000
- Contained Unit: oz
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: Significant silver grade and contained metal in the Measured category for the Massive Sulfide domain.

- Positive factor: measured\_resource

Evidence · table

> 3.62

Context: 54,000

### measured

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-2)

South Mountain Project · gold

#### Identity

- Project: South Mountain Project
- Commodity: gold
- Ticker: THM

#### Resource Data

- Category: measured
- Tonnes: 48987.99
- Grade: 0.07
- Grade Unit: t. oz/ sh. Ton
- Contained Metal: 3800
- Contained Unit: oz
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: Gold grade and contained metal in the Measured category for the Massive Sulfide domain.

- Positive factor: measured\_resource

Evidence · table

> 0.070

Context: 54,000

### measured

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-3)

South Mountain Project · copper

#### Identity

- Project: South Mountain Project
- Commodity: copper
- Ticker: THM

#### Resource Data

- Category: measured
- Tonnes: 48987.99
- Grade: 0.45
- Grade Unit: %
- Contained Metal: 226.796
- Contained Unit: tonnes
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: Copper grade and contained metal in the Measured category for the Massive Sulfide domain.

- Positive factor: measured\_resource

Evidence · table

> 0.45

Context: 54,000

### measured

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-4)

South Mountain Project · lead

#### Identity

- Project: South Mountain Project
- Commodity: lead
- Ticker: THM

#### Resource Data

- Category: measured
- Tonnes: 48987.99
- Grade: 0.79
- Grade Unit: %
- Contained Metal: 385.55
- Contained Unit: tonnes
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: Lead grade and contained metal in the Measured category for the Massive Sulfide domain.

- Positive factor: measured\_resource

Evidence · table

> 0.79

Context: 54,000

### measured

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-5)

South Mountain Project · zinc

#### Identity

- Project: South Mountain Project
- Commodity: zinc
- Ticker: THM

#### Resource Data

- Category: measured
- Tonnes: 48987.99
- Grade: 19.54
- Grade Unit: ZnEq \(%\)
- Contained Metal: 9480.07
- Contained Unit: tonnes
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: High zinc equivalent grade in the Measured category for the Massive Sulfide domain, with disclosed assumptions.

- Positive factor: high\_grade

- Positive factor: measured\_resource

Evidence · table

> 19.54

Context: 54,000

### indicated

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-6)

South Mountain Project · zinc

#### Identity

- Project: South Mountain Project
- Commodity: zinc
- Ticker: THM

#### Resource Data

- Category: indicated
- Tonnes: 110654.57
- Grade: 11.15
- Grade Unit: %
- Contained Metal: 12383.07
- Contained Unit: tonnes
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: High-grade zinc in the Indicated category for the Massive Sulfide domain, contributing to overall resource growth.

- Positive factor: high\_grade

- Positive factor: indicated\_resource

Evidence · table

> 11.15

Context: 122,000

### indicated

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-7)

South Mountain Project · silver

#### Identity

- Project: South Mountain Project
- Commodity: silver
- Ticker: THM

#### Resource Data

- Category: indicated
- Tonnes: 110654.57
- Grade: 4.74
- Grade Unit: t. oz/ sh. Ton
- Contained Metal: 580000
- Contained Unit: oz
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: Significant silver grade and contained metal in the Indicated category for the Massive Sulfide domain.

- Positive factor: indicated\_resource

Evidence · table

> 4.74

Context: 122,000

### indicated

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-8)

South Mountain Project · gold

#### Identity

- Project: South Mountain Project
- Commodity: gold
- Ticker: THM

#### Resource Data

- Category: indicated
- Tonnes: 110654.57
- Grade: 0.074
- Grade Unit: t. oz/ sh. Ton
- Contained Metal: 9100
- Contained Unit: oz
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: Gold grade and contained metal in the Indicated category for the Massive Sulfide domain.

- Positive factor: indicated\_resource

Evidence · table

> 0.074

Context: 122,000

### indicated

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-9)

South Mountain Project · copper

#### Identity

- Project: South Mountain Project
- Commodity: copper
- Ticker: THM

#### Resource Data

- Category: indicated
- Tonnes: 110654.57
- Grade: 0.55
- Grade Unit: %
- Contained Metal: 589.67
- Contained Unit: tonnes
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: Copper grade and contained metal in the Indicated category for the Massive Sulfide domain.

- Positive factor: indicated\_resource

Evidence · table

> 0.55

Context: 122,000

### indicated

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-10)

South Mountain Project · lead

#### Identity

- Project: South Mountain Project
- Commodity: lead
- Ticker: THM

#### Resource Data

- Category: indicated
- Tonnes: 110654.57
- Grade: 1.32
- Grade Unit: %
- Contained Metal: 1469.64
- Contained Unit: tonnes
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: Lead grade and contained metal in the Indicated category for the Massive Sulfide domain.

- Positive factor: indicated\_resource

Evidence · table

> 1.32

Context: 122,000

### indicated

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-11)

South Mountain Project · zinc

#### Identity

- Project: South Mountain Project
- Commodity: zinc
- Ticker: THM

#### Resource Data

- Category: indicated
- Tonnes: 110654.57
- Grade: 20.93
- Grade Unit: ZnEq \(%\)
- Contained Metal: 23224.38
- Contained Unit: tonnes
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: High zinc equivalent grade in the Indicated category for the Massive Sulfide domain, with disclosed assumptions.

- Positive factor: high\_grade

- Positive factor: indicated\_resource

Evidence · table

> 20.93

Context: 122,000

### inferred

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-12)

South Mountain Project · zinc

#### Identity

- Project: South Mountain Project
- Commodity: zinc
- Ticker: THM

#### Resource Data

- Category: inferred
- Tonnes: 787570.8
- Grade: 8.25
- Grade Unit: %
- Contained Metal: 64954.8
- Contained Unit: tonnes
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: Significant zinc grade and contained metal in the Inferred category for the Massive Sulfide domain, showing tonnage growth.

- Positive factor: high\_grade

- Positive factor: tonnage\_growth

- Negative factor: inferred\_resource

Evidence · table

> 8.25

Context: 868,000

### inferred

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-13)

South Mountain Project · silver

#### Identity

- Project: South Mountain Project
- Commodity: silver
- Ticker: THM

#### Resource Data

- Category: inferred
- Tonnes: 787570.8
- Grade: 5.96
- Grade Unit: t. oz/ sh. Ton
- Contained Metal: 5177000
- Contained Unit: oz
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: Significant silver grade and contained metal in the Inferred category for the Massive Sulfide domain, showing tonnage growth.

- Positive factor: tonnage\_growth

- Negative factor: inferred\_resource

Evidence · table

> 5.96

Context: 868,000

### inferred

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-14)

South Mountain Project · gold

#### Identity

- Project: South Mountain Project
- Commodity: gold
- Ticker: THM

#### Resource Data

- Category: inferred
- Tonnes: 787570.8
- Grade: 0.04
- Grade Unit: t. oz/ sh. Ton
- Contained Metal: 34700
- Contained Unit: oz
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: Gold grade and contained metal in the Inferred category for the Massive Sulfide domain, showing tonnage growth.

- Positive factor: tonnage\_growth

- Negative factor: inferred\_resource

Evidence · table

> 0.040

Context: 868,000

### inferred

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-15)

South Mountain Project · copper

#### Identity

- Project: South Mountain Project
- Commodity: copper
- Ticker: THM

#### Resource Data

- Category: inferred
- Tonnes: 787570.8
- Grade: 0.74
- Grade Unit: %
- Contained Metal: 5805.98
- Contained Unit: tonnes
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: Copper grade and contained metal in the Inferred category for the Massive Sulfide domain, showing tonnage growth.

- Positive factor: tonnage\_growth

- Negative factor: inferred\_resource

Evidence · table

> 0.74

Context: 868,000

### inferred

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-16)

South Mountain Project · lead

#### Identity

- Project: South Mountain Project
- Commodity: lead
- Ticker: THM

#### Resource Data

- Category: inferred
- Tonnes: 787570.8
- Grade: 1.16
- Grade Unit: %
- Contained Metal: 9162.56
- Contained Unit: tonnes
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: Lead grade and contained metal in the Inferred category for the Massive Sulfide domain, showing tonnage growth.

- Positive factor: tonnage\_growth

- Negative factor: inferred\_resource

Evidence · table

> 1.16

Context: 868,000

### inferred

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-17)

South Mountain Project · zinc

#### Identity

- Project: South Mountain Project
- Commodity: zinc
- Ticker: THM

#### Resource Data

- Category: inferred
- Tonnes: 787570.8
- Grade: 17.69
- Grade Unit: ZnEq \(%\)
- Contained Metal: 139344.3
- Contained Unit: tonnes
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: High zinc equivalent grade in the Inferred category for the Massive Sulfide domain, showing tonnage growth with disclosed assumptions.

- Positive factor: high\_grade

- Positive factor: tonnage\_growth

- Negative factor: inferred\_resource

Evidence · table

> 17.69

Context: 868,000

### measured

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-18)

South Mountain Project · zinc

#### Identity

- Project: South Mountain Project
- Commodity: zinc
- Ticker: THM

#### Resource Data

- Category: measured
- Tonnes: 13607.78
- Grade: 0.99
- Grade Unit: %
- Contained Metal: 136.08
- Contained Unit: tonnes
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: Zinc grade in the Measured category for the Skarn domain.

- Positive factor: measured\_resource

Evidence · table

> 0.99

Context: 15,000

### measured

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-19)

South Mountain Project · silver

#### Identity

- Project: South Mountain Project
- Commodity: silver
- Ticker: THM

#### Resource Data

- Category: measured
- Tonnes: 13607.78
- Grade: 4.61
- Grade Unit: t. oz/ sh. Ton
- Contained Metal: 70000
- Contained Unit: oz
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: Silver grade and contained metal in the Measured category for the Skarn domain.

- Positive factor: measured\_resource

Evidence · table

> 4.61

Context: 15,000

### measured

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-20)

South Mountain Project · gold

#### Identity

- Project: South Mountain Project
- Commodity: gold
- Ticker: THM

#### Resource Data

- Category: measured
- Tonnes: 13607.78
- Grade: 0.017
- Grade Unit: t. oz/ sh. Ton
- Contained Metal: 300
- Contained Unit: oz
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: Gold grade and contained metal in the Measured category for the Skarn domain.

- Positive factor: measured\_resource

Evidence · table

> 0.017

Context: 15,000

### measured

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-21)

South Mountain Project · copper

#### Identity

- Project: South Mountain Project
- Commodity: copper
- Ticker: THM

#### Resource Data

- Category: measured
- Tonnes: 13607.78
- Grade: 1.12
- Grade Unit: %
- Contained Metal: 136.08
- Contained Unit: tonnes
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: High-grade copper in the Measured category for the Skarn domain.

- Positive factor: high\_grade

- Positive factor: measured\_resource

Evidence · table

> 1.12

Context: 15,000

### measured

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-22)

South Mountain Project · lead

#### Identity

- Project: South Mountain Project
- Commodity: lead
- Ticker: THM

#### Resource Data

- Category: measured
- Tonnes: 13607.78
- Grade: 0.27
- Grade Unit: %
- Contained Metal: 36.287
- Contained Unit: tonnes
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: Lead grade and contained metal in the Measured category for the Skarn domain.

- Positive factor: measured\_resource

Evidence · table

> 0.27

Context: 15,000

### measured

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-23)

South Mountain Project · zinc

#### Identity

- Project: South Mountain Project
- Commodity: zinc
- Ticker: THM

#### Resource Data

- Category: measured
- Tonnes: 13607.78
- Grade: 14.83
- Grade Unit: ZnEq \(%\)
- Contained Metal: 2041.17
- Contained Unit: tonnes
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: High zinc equivalent grade in the Measured category for the Skarn domain, with disclosed assumptions.

- Positive factor: high\_grade

- Positive factor: measured\_resource

Evidence · table

> 14.83

Context: 15,000

### indicated

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-24)

South Mountain Project · zinc

#### Identity

- Project: South Mountain Project
- Commodity: zinc
- Ticker: THM

#### Resource Data

- Category: indicated
- Tonnes: 29030.08
- Grade: 0.44
- Grade Unit: %
- Contained Metal: 136.08
- Contained Unit: tonnes
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: Zinc grade in the Indicated category for the Skarn domain.

- Positive factor: indicated\_resource

Evidence · table

> 0.44

Context: 32,000

### indicated

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-25)

South Mountain Project · silver

#### Identity

- Project: South Mountain Project
- Commodity: silver
- Ticker: THM

#### Resource Data

- Category: indicated
- Tonnes: 29030.08
- Grade: 3.44
- Grade Unit: t. oz/ sh. Ton
- Contained Metal: 109000
- Contained Unit: oz
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: Silver grade and contained metal in the Indicated category for the Skarn domain.

- Positive factor: indicated\_resource

Evidence · table

> 3.44

Context: 32,000

### indicated

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-26)

South Mountain Project · gold

#### Identity

- Project: South Mountain Project
- Commodity: gold
- Ticker: THM

#### Resource Data

- Category: indicated
- Tonnes: 29030.08
- Grade: 0.005
- Grade Unit: t. oz/ sh. Ton
- Contained Metal: 100
- Contained Unit: oz
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: Gold grade and contained metal in the Indicated category for the Skarn domain.

- Positive factor: indicated\_resource

Evidence · table

> 0.005

Context: 32,000

### indicated

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-27)

South Mountain Project · copper

#### Identity

- Project: South Mountain Project
- Commodity: copper
- Ticker: THM

#### Resource Data

- Category: indicated
- Tonnes: 29030.08
- Grade: 1.12
- Grade Unit: %
- Contained Metal: 317.51
- Contained Unit: tonnes
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: High-grade copper in the Indicated category for the Skarn domain.

- Positive factor: high\_grade

- Positive factor: indicated\_resource

Evidence · table

> 1.12

Context: 32,000

### indicated

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-28)

South Mountain Project · lead

#### Identity

- Project: South Mountain Project
- Commodity: lead
- Ticker: THM

#### Resource Data

- Category: indicated
- Tonnes: 29030.08
- Grade: 0.07
- Grade Unit: %
- Contained Metal: 18.14
- Contained Unit: tonnes
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: Lead grade and contained metal in the Indicated category for the Skarn domain.

- Positive factor: indicated\_resource

Evidence · table

> 0.07

Context: 32,000

### indicated

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-29)

South Mountain Project · zinc

#### Identity

- Project: South Mountain Project
- Commodity: zinc
- Ticker: THM

#### Resource Data

- Category: indicated
- Tonnes: 29030.08
- Grade: 11.38
- Grade Unit: ZnEq \(%\)
- Contained Metal: 3265.87
- Contained Unit: tonnes
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: High zinc equivalent grade in the Indicated category for the Skarn domain, with disclosed assumptions.

- Positive factor: high\_grade

- Positive factor: indicated\_resource

Evidence · table

> 11.38

Context: 32,000

### inferred

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-30)

South Mountain Project · zinc

#### Identity

- Project: South Mountain Project
- Commodity: zinc
- Ticker: THM

#### Resource Data

- Category: inferred
- Tonnes: 82553.84
- Grade: 1.02
- Grade Unit: %
- Contained Metal: 861.82
- Contained Unit: tonnes
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: Zinc grade and contained metal in the Inferred category for the Skarn domain, showing tonnage growth.

- Positive factor: tonnage\_growth

- Negative factor: inferred\_resource

Evidence · table

> 1.02

Context: 91,000

### inferred

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-31)

South Mountain Project · silver

#### Identity

- Project: South Mountain Project
- Commodity: silver
- Ticker: THM

#### Resource Data

- Category: inferred
- Tonnes: 82553.84
- Grade: 2.86
- Grade Unit: t. oz/ sh. Ton
- Contained Metal: 261000
- Contained Unit: oz
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: Silver grade and contained metal in the Inferred category for the Skarn domain, showing tonnage growth.

- Positive factor: tonnage\_growth

- Negative factor: inferred\_resource

Evidence · table

> 2.86

Context: 91,000

### inferred

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-32)

South Mountain Project · gold

#### Identity

- Project: South Mountain Project
- Commodity: gold
- Ticker: THM

#### Resource Data

- Category: inferred
- Tonnes: 82553.84
- Grade: 0.005
- Grade Unit: t. oz/ sh. Ton
- Contained Metal: 400
- Contained Unit: oz
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: Gold grade and contained metal in the Inferred category for the Skarn domain, showing tonnage growth.

- Positive factor: tonnage\_growth

- Negative factor: inferred\_resource

Evidence · table

> 0.005

Context: 91,000

### inferred

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-33)

South Mountain Project · copper

#### Identity

- Project: South Mountain Project
- Commodity: copper
- Ticker: THM

#### Resource Data

- Category: inferred
- Tonnes: 82553.84
- Grade: 1.41
- Grade Unit: %
- Contained Metal: 1179.34
- Contained Unit: tonnes
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: High-grade copper in the Inferred category for the Skarn domain, showing tonnage growth.

- Positive factor: high\_grade

- Positive factor: tonnage\_growth

- Negative factor: inferred\_resource

Evidence · table

> 1.41

Context: 91,000

### inferred

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-34)

South Mountain Project · lead

#### Identity

- Project: South Mountain Project
- Commodity: lead
- Ticker: THM

#### Resource Data

- Category: inferred
- Tonnes: 82553.84
- Grade: 0.04
- Grade Unit: %
- Contained Metal: 31.75
- Contained Unit: tonnes
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: Lead grade and contained metal in the Inferred category for the Skarn domain, showing tonnage growth.

- Positive factor: tonnage\_growth

- Negative factor: inferred\_resource

Evidence · table

> 0.04

Context: 91,000

### inferred

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-35)

South Mountain Project · zinc

#### Identity

- Project: South Mountain Project
- Commodity: zinc
- Ticker: THM

#### Resource Data

- Category: inferred
- Tonnes: 82553.84
- Grade: 12.65
- Grade Unit: ZnEq \(%\)
- Contained Metal: 10478.01
- Contained Unit: tonnes
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: High zinc equivalent grade in the Inferred category for the Skarn domain, showing tonnage growth with disclosed assumptions.

- Positive factor: high\_grade

- Positive factor: tonnage\_growth

- Negative factor: inferred\_resource

Evidence · table

> 12.65

Context: 91,000

### measured

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-36)

South Mountain Project · zinc

#### Identity

- Project: South Mountain Project
- Commodity: zinc
- Ticker: THM

#### Resource Data

- Category: measured
- Tonnes: 62585.77
- Grade: 9.18
- Grade Unit: %
- Contained Metal: 5715.26
- Contained Unit: tonnes
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: High-grade zinc in the Measured category for the total resource, contributing to overall resource growth.

- Positive factor: high\_grade

- Positive factor: measured\_resource

Evidence · table

> 9.18

Context: 69,000

### measured

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-37)

South Mountain Project · silver

#### Identity

- Project: South Mountain Project
- Commodity: silver
- Ticker: THM

#### Resource Data

- Category: measured
- Tonnes: 62585.77
- Grade: 3.84
- Grade Unit: t. oz/ sh. Ton
- Contained Metal: 264000
- Contained Unit: oz
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: Significant silver grade and contained metal in the Measured category for the total resource.

- Positive factor: measured\_resource

Evidence · table

> 3.84

Context: 69,000

### measured

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-38)

South Mountain Project · gold

#### Identity

- Project: South Mountain Project
- Commodity: gold
- Ticker: THM

#### Resource Data

- Category: measured
- Tonnes: 62585.77
- Grade: 0.058
- Grade Unit: t. oz/ sh. Ton
- Contained Metal: 4000
- Contained Unit: oz
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: Gold grade and contained metal in the Measured category for the total resource.

- Positive factor: measured\_resource

Evidence · table

> 0.058

Context: 69,000

### measured

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-39)

South Mountain Project · copper

#### Identity

- Project: South Mountain Project
- Commodity: copper
- Ticker: THM

#### Resource Data

- Category: measured
- Tonnes: 62585.77
- Grade: 0.6
- Grade Unit: %
- Contained Metal: 362.87
- Contained Unit: tonnes
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: Copper grade and contained metal in the Measured category for the total resource.

- Positive factor: measured\_resource

Evidence · table

> 0.60

Context: 69,000

### measured

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-40)

South Mountain Project · lead

#### Identity

- Project: South Mountain Project
- Commodity: lead
- Ticker: THM

#### Resource Data

- Category: measured
- Tonnes: 62585.77
- Grade: 0.67
- Grade Unit: %
- Contained Metal: 421.84
- Contained Unit: tonnes
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: Lead grade and contained metal in the Measured category for the total resource.

- Positive factor: measured\_resource

Evidence · table

> 0.67

Context: 69,000

### measured

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-41)

South Mountain Project · zinc

#### Identity

- Project: South Mountain Project
- Commodity: zinc
- Ticker: THM

#### Resource Data

- Category: measured
- Tonnes: 62585.77
- Grade: 18.5
- Grade Unit: ZnEq \(%\)
- Contained Metal: 11566.6
- Contained Unit: tonnes
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: High zinc equivalent grade in the Measured category for the total resource, with disclosed assumptions.

- Positive factor: high\_grade

- Positive factor: measured\_resource

Evidence · table

> 18.50

Context: 69,000

### indicated

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-42)

South Mountain Project · zinc

#### Identity

- Project: South Mountain Project
- Commodity: zinc
- Ticker: THM

#### Resource Data

- Category: indicated
- Tonnes: 139625.49
- Grade: 8.95
- Grade Unit: %
- Contained Metal: 12519.15
- Contained Unit: tonnes
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: High-grade zinc in the Indicated category for the total resource, contributing to overall resource growth.

- Positive factor: high\_grade

- Positive factor: indicated\_resource

Evidence · table

> 8.95

Context: 154,000

### indicated

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-43)

South Mountain Project · silver

#### Identity

- Project: South Mountain Project
- Commodity: silver
- Ticker: THM

#### Resource Data

- Category: indicated
- Tonnes: 139625.49
- Grade: 4.47
- Grade Unit: t. oz/ sh. Ton
- Contained Metal: 688000
- Contained Unit: oz
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: Significant silver grade and contained metal in the Indicated category for the total resource.

- Positive factor: indicated\_resource

Evidence · table

> 4.47

Context: 154,000

### indicated

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-44)

South Mountain Project · gold

#### Identity

- Project: South Mountain Project
- Commodity: gold
- Ticker: THM

#### Resource Data

- Category: indicated
- Tonnes: 139625.49
- Grade: 0.06
- Grade Unit: t. oz/ sh. Ton
- Contained Metal: 9300
- Contained Unit: oz
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: Gold grade and contained metal in the Indicated category for the total resource.

- Positive factor: indicated\_resource

Evidence · table

> 0.060

Context: 154,000

### indicated

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-45)

South Mountain Project · copper

#### Identity

- Project: South Mountain Project
- Commodity: copper
- Ticker: THM

#### Resource Data

- Category: indicated
- Tonnes: 139625.49
- Grade: 0.66
- Grade Unit: %
- Contained Metal: 907.185
- Contained Unit: tonnes
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: Copper grade and contained metal in the Indicated category for the total resource.

- Positive factor: indicated\_resource

Evidence · table

> 0.66

Context: 154,000

### indicated

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-46)

South Mountain Project · lead

#### Identity

- Project: South Mountain Project
- Commodity: lead
- Ticker: THM

#### Resource Data

- Category: indicated
- Tonnes: 139625.49
- Grade: 1.06
- Grade Unit: %
- Contained Metal: 1487.78
- Contained Unit: tonnes
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: Lead grade and contained metal in the Indicated category for the total resource.

- Positive factor: indicated\_resource

Evidence · table

> 1.06

Context: 154,000

### indicated

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-47)

South Mountain Project · zinc

#### Identity

- Project: South Mountain Project
- Commodity: zinc
- Ticker: THM

#### Resource Data

- Category: indicated
- Tonnes: 139625.49
- Grade: 18.97
- Grade Unit: ZnEq \(%\)
- Contained Metal: 26489.9
- Contained Unit: tonnes
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: High zinc equivalent grade in the Indicated category for the total resource, with disclosed assumptions.

- Positive factor: high\_grade

- Positive factor: indicated\_resource

Evidence · table

> 18.97

Context: 154,000

### inferred

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-48)

South Mountain Project · zinc

#### Identity

- Project: South Mountain Project
- Commodity: zinc
- Ticker: THM

#### Resource Data

- Category: inferred
- Tonnes: 869900.4
- Grade: 7.56
- Grade Unit: %
- Contained Metal: 65770.9
- Contained Unit: tonnes
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: Significant zinc grade and contained metal in the Inferred category for the total resource, showing tonnage growth.

- Positive factor: high\_grade

- Positive factor: tonnage\_growth

- Negative factor: inferred\_resource

Evidence · table

> 7.56

Context: 959,000

### inferred

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-49)

South Mountain Project · silver

#### Identity

- Project: South Mountain Project
- Commodity: silver
- Ticker: THM

#### Resource Data

- Category: inferred
- Tonnes: 869900.4
- Grade: 5.67
- Grade Unit: t. oz/ sh. Ton
- Contained Metal: 5438000
- Contained Unit: oz
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: Significant silver grade and contained metal in the Inferred category for the total resource, showing tonnage growth.

- Positive factor: tonnage\_growth

- Negative factor: inferred\_resource

Evidence · table

> 5.67

Context: 959,000

### inferred

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-50)

South Mountain Project · gold

#### Identity

- Project: South Mountain Project
- Commodity: gold
- Ticker: THM

#### Resource Data

- Category: inferred
- Tonnes: 869900.4
- Grade: 0.037
- Grade Unit: t. oz/ sh. Ton
- Contained Metal: 35200
- Contained Unit: oz
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: Gold grade and contained metal in the Inferred category for the total resource, showing tonnage growth.

- Positive factor: tonnage\_growth

- Negative factor: inferred\_resource

Evidence · table

> 0.037

Context: 959,000

### inferred

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-51)

South Mountain Project · copper

#### Identity

- Project: South Mountain Project
- Commodity: copper
- Ticker: THM

#### Resource Data

- Category: inferred
- Tonnes: 869900.4
- Grade: 0.8
- Grade Unit: %
- Contained Metal: 6985.35
- Contained Unit: tonnes
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: Copper grade and contained metal in the Inferred category for the total resource, showing tonnage growth.

- Positive factor: tonnage\_growth

- Negative factor: inferred\_resource

Evidence · table

> 0.80

Context: 959,000

### inferred

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-52)

South Mountain Project · lead

#### Identity

- Project: South Mountain Project
- Commodity: lead
- Ticker: THM

#### Resource Data

- Category: inferred
- Tonnes: 869900.4
- Grade: 1.06
- Grade Unit: %
- Contained Metal: 9194.3
- Contained Unit: tonnes
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: Lead grade and contained metal in the Inferred category for the total resource, showing tonnage growth.

- Positive factor: tonnage\_growth

- Negative factor: inferred\_resource

Evidence · table

> 1.06

Context: 959,000

### inferred

[Link to this fact](https://atlas-staging.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--4f8e446f-a2a6-4158-ad7b-33355277b3df#fact-resource-facts-53)

South Mountain Project · zinc

#### Identity

- Project: South Mountain Project
- Commodity: zinc
- Ticker: THM

#### Resource Data

- Category: inferred
- Tonnes: 869900.4
- Grade: 17.21
- Grade Unit: ZnEq \(%\)
- Contained Metal: 149820.9
- Contained Unit: tonnes
- Cutoff Grade: 97.5

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-12-21T00:00:00.000Z

Reasoning: High zinc equivalent grade in the Inferred category for the total resource, showing tonnage growth with disclosed assumptions.

- Positive factor: high\_grade

- Positive factor: tonnage\_growth

- Negative factor: inferred\_resource

Evidence · table

> 17.21

Context: 959,000

## 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.