# SONORO FILES UPDATED PRELIMINARY ECONOMIC ASSESSMENT FOR THE CERRO CALICHE PROJECT

Canonical Atlas analysis: https://atlas-staging.minestarters.com/news/sonoro-files-updated-preliminary-economic-assessment-for-the-cerro-caliche-proje--33133c9e-b2b4-40ec-af14-3f049affd992

Original source: https://orestocks.com/company/SGO.V/press-releases/7108977748587335

Publisher: orestocks

Original announcement: 2026-04-15T16:00:00.000Z

Analysis by Minestarters Atlas

Atlas analysis published: 2026-10-01T04:18:22.793Z

Atlas analysis updated: 2026-10-01T04:18:22.793Z

- Company: Sonoro Gold Corp.

- Ticker: SGO

- Exchange: TSXV

- Region: Sonora, Mexico

- Primary commodity: Gold

- Secondary commodities: Silver

- Document categories: Metallurgy, Resource update

- Extracted: 2026-10-01 04:18:23 UTC

Narrative sentiment: 0.60 · Bullish

## Minestarters Atlas summary

Sonoro Gold Corp. has filed an updated Preliminary Economic Assessment \(PEA\) for the Cerro Caliche Gold Project in Sonora, Mexico. The PEA indicates a potential 10-year open pit, heap leach operation with a pre-tax NPV8 of $360 million and an IRR of 65%.

Reasoning: The updated PEA presents strong economic metrics \(NPV, IRR, Payback\) for the Cerro Caliche project, though it remains at a preliminary stage with significant inferred resources.

- Positive factor: Strong economic indicators with $360M Pre-Tax NPV8

- Positive factor: High IRR of 65% Pre-Tax

- Positive factor: Short payback period of 1.7 years

- Positive factor: PEA-supporting technical report filed

- Negative factor: PEA is preliminary in nature

- Negative factor: Includes Inferred resources which are speculative

- Negative factor: Gold recovery of 72% is relatively low for a mill route \(though heap leach is stated\)

Facts used in scoring: 2

## Classification and evidence

**PEA-Supporting**

Polarity: neutral

Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study.

Why it applies: The document reports the filing of an updated Preliminary Economic Assessment \(PEA\).

Evidence · text

> SONORO FILES UPDATED PRELIMINARY ECONOMIC ASSESSMENT

**NI 43-101 Compliant**

Polarity: positive

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

Why it applies: The PEA was prepared in accordance with NI 43-101 requirements.

Evidence · text

> prepared in accordance with the requirements of National Instrument 43-101

**Heap Leach Route**

Polarity: neutral

Definition: Processing via heap leach — lower CAPEX and OPEX, lower recovery expected.

Why it applies: the document describes a heap\_leach route \("heap leach"\)

**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-staging.minestarters.com/news/sonoro-files-updated-preliminary-economic-assessment-for-the-cerro-caliche-proje--33133c9e-b2b4-40ec-af14-3f049affd992#fact-metallurgical-facts-0)

Cerro Caliche Gold Project · gold

#### Identity

- Project: Cerro Caliche Gold Project
- Commodity: gold
- Region: mexico
- Reported Region: Sonora, Mexico
- Ticker: SGO

#### Test Work

- Program Status: preliminary
- Sample: LOM average production

#### Recovery

- Recovery: 72 %
- Recovery Basis: unspecified

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-04-15T00:00:00.000Z

Reasoning: 72% gold recovery reported for the LOM heap leach operation.

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-staging.minestarters.com/news/sonoro-files-updated-preliminary-economic-assessment-for-the-cerro-caliche-proje--33133c9e-b2b4-40ec-af14-3f049affd992#fact-metallurgical-facts-1)

Cerro Caliche Gold Project · silver

#### Identity

- Project: Cerro Caliche Gold Project
- Commodity: silver
- Region: mexico
- Reported Region: Sonora, Mexico
- Ticker: SGO

#### Test Work

- Program Status: preliminary
- Sample: LOM average production

#### Recovery

- Recovery: 27 %
- Recovery Basis: unspecified

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-04-15T00:00:00.000Z

Reasoning: Silver recovery is reported at 27%.

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.