# Marimaca grows Marimaca oxide resource

Canonical Atlas analysis: https://atlas-staging.minestarters.com/news/marimaca-grows-marimaca-oxide-resource--e4842eb8-d8e0-4751-8d54-587874d3cf05

Original source: https://www.mining-journal.com/base-metals/news/1453111/marimaca-grows-marimaca-oxide-resource

Publisher: miningjournal

Original announcement: 2023-05-19T08:56:41.000Z

Analysis by Minestarters Atlas

Atlas analysis published: Unknown date

Atlas analysis updated: Unknown date

- Company: Marimaca

- Ticker: Unavailable

- Exchange: Unavailable

- Region: Chile

- Primary commodity: Copper

- Secondary commodities: None reported

- Document categories: Resource update

- Extracted: 2026-08-28 18:04:10 UTC

Narrative sentiment: 0.60 · Bullish

## Minestarters Atlas summary

Marimaca has reported an expanded oxide copper resource, now totaling 200.3Mt of Measured and Indicated resources at 0.45% Cu, plus an additional 37.3Mt of Inferred resources at 0.38% Cu. The update suggests a larger project potential as it moves toward feasibility.

Reasoning: The announcement reports a substantial copper resource expansion with a significant portion in higher-confidence M&I categories.

- Positive factor: Significant copper resource scale

- Positive factor: Presence of Measured and Indicated categories

Facts used in scoring: 2

## Classification and evidence

**Indicated Resource**

Polarity: positive

Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves.

Why it applies: The resource includes a measured and indicated component.

Evidence · text

> Marimaca now hosts a measured and indicated resource

**Inferred Resource**

Polarity: negative

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

Why it applies: The report includes an inferred resource component.

Evidence · text

> with an inferred resource of 37.3Mt

## Extracted facts

Stored fact records: 2. Some facts used in scoring do not have a stored record.

## Resource Estimates (2)

### indicated

[Link to this fact](https://atlas-staging.minestarters.com/news/marimaca-grows-marimaca-oxide-resource--e4842eb8-d8e0-4751-8d54-587874d3cf05#fact-resource-facts-0)

copper

#### Identity

- Commodity: copper

#### Resource Data

- Category: indicated
- Tonnes: 200300000
- Grade: 0.45
- Grade Unit: %
- Contained Metal: 900000
- Contained Unit: t

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-05-19T00:00:00.000Z

Reasoning: Significant copper resource reported in M&I category.

- Positive factor: Large tonnage

Evidence · text

> measured and indicated resource of 200.3Mt grading 0.45% copper for 900,000t of contained copper

### inferred

[Link to this fact](https://atlas-staging.minestarters.com/news/marimaca-grows-marimaca-oxide-resource--e4842eb8-d8e0-4751-8d54-587874d3cf05#fact-resource-facts-1)

copper

#### Identity

- Commodity: copper

#### Resource Data

- Category: inferred
- Tonnes: 37300000
- Grade: 0.38
- Grade Unit: %
- Contained Metal: 141000
- Contained Unit: t

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2023-05-19T00:00:00.000Z

Reasoning: Inferred resource adds volume but carries higher geological risk.

- Positive factor: Additional resource volume

- Negative factor: Lower confidence category

Evidence · text

> inferred resource of 37.3Mt grading 0.38% copper for 141,000t of copper

## 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.