# RDM: Sybella Six Metre Columns Leach Tests Underway

Canonical Atlas analysis: https://atlas-staging.minestarters.com/news/rdm-sybella-six-metre-columns-leach-tests-underway--51a9482d-c83d-4138-88e6-27806cb0434c

Original source: https://www.asx.com.au/asx/v2/statistics/displayAnnouncement.do?display=pdf&idsId=03155095

Publisher: asx

Original announcement: 2026-10-20T23:03:00.000Z

Analysis by Minestarters Atlas

Atlas analysis published: 2026-10-21T00:10:56.242Z

Atlas analysis updated: 2026-10-21T00:10:56.242Z

- Company: Red Metal Limited

- Ticker: RDM

- Exchange: ASX

- Region: Unavailable

- Primary commodity: Rare earths

- Secondary commodities: Neodymium, Praseodymium

- Document categories: Metallurgy, Other

- Extracted: 2026-10-21 00:10:56 UTC

Narrative sentiment: 0.40 · Bullish

## Minestarters Atlas summary

Red Metal Limited has commenced large-diameter, six-metre tall column leach tests on Saprock and Transitional ore from the Sybella Kary Zone. These tests aim to simulate full-scale commercial heap conditions to de-risk future Definitive Feasibility Study \(DFS\) design assumptions. Parallel tests are also underway using a coarser -30mm crush size to evaluate potential cost reductions.

Reasoning: The commencement of larger-scale column leach tests is a significant de-risking milestone for the upcoming DFS, moving from lab-scale to more realistic heap simulations.

- Positive factor: Scaling up to larger 6m columns provides more representative simulation of commercial heap

- Positive factor: Testing coarser crush sizes to potentially lower OPEX and CAPEX

- Positive factor: Building on previous successful 2m column leach results

Facts used in scoring: 2

## Classification and evidence

**Bench Scale Only**

Polarity: negative

Definition: Only preliminary bench tests completed — no locked-cycle or pilot work.

Why it applies: The current 6m tests are scaling up from previous 2m tests, but are still column-scale rather than full-scale heap leach plant tests.

Evidence · text

> The program is designed to bridge the gap between laboratory-scale testing and full-scale heap leaching

**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/rdm-sybella-six-metre-columns-leach-tests-underway--51a9482d-c83d-4138-88e6-27806cb0434c#fact-metallurgical-facts-0)

neodymium

Historical result

Needs review: historical\_restatement

#### Identity

- Commodity: neodymium
- Ticker: RDM

#### Test Work

- Sample: Transitional ore from 2m column leach test \(reported 18 June 2026\)

#### Recovery

- Recovery: 76 %
- Recovery Basis: actual\_test

#### Review

- Needs Review: Yes
- Review Reason: historical\_restatement
- Historical: Yes
- Historical Source Date: 2026-06-18T00:00:00.000Z

#### Dates

- Event date: 2026-10-20T00:00:00.000Z

Reasoning: Historical result reported for comparison; shows strong recovery for neodymium.

- Positive factor: Strong extraction result of 76%

Evidence · text

> Neodymium extraction of up to 76%

### Fact 2

[Link to this fact](https://atlas-staging.minestarters.com/news/rdm-sybella-six-metre-columns-leach-tests-underway--51a9482d-c83d-4138-88e6-27806cb0434c#fact-metallurgical-facts-1)

praseodymium

Historical result

Needs review: historical\_restatement

#### Identity

- Commodity: praseodymium
- Ticker: RDM

#### Test Work

- Sample: Transitional ore from 2m column leach test \(reported 18 June 2026\)

#### Recovery

- Recovery: 78 %
- Recovery Basis: actual\_test

#### Review

- Needs Review: Yes
- Review Reason: historical\_restatement
- Historical: Yes
- Historical Source Date: 2026-06-18T00:00:00.000Z

#### Dates

- Event date: 2026-10-20T00:00:00.000Z

Reasoning: Historical result reported for comparison; shows strong recovery for praseodymium.

- Positive factor: Strong extraction result of 78%

Evidence · text

> Praseodymium extraction of up to 78%

## 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.