DeSoto Resources Advances 1,105-Point Soil Sampling Across 687km² Siguiri Gold Portfolio in Guinea

Aditi Sarkar

04 November 2026 10:15 AM AEDT

DeSoto Resources Advances 1,105-Point Soil Sampling Across 687km² Siguiri Gold Portfolio in Guinea

Image Source: Krish Capital Pty Ltd

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DeSoto Resources (ASX:DES) has disclosed that regional exploration is progressing across its 687km² southwest Siguiri portfolio in Guinea, with 1,105 sampling points completed as part of a planned 2,239-point soil sampling program designed to refine previously identified gold anomalies across eight near-contiguous projects.

Key Points

1,105 of a planned 2,239 soil sampling points have been completed, including 466 points at the Yarakoura Project.
Previous BLEG sampling programs identified anomalous gold values ranging from 6.62 ppb to 56.20 ppb Au across all eight projects.
596 of a planned 1,195 power auger holes have been completed at Timbakouna, with more than 2,500 samples currently in the laboratory awaiting results.
A regional field office has been established at Yarakoura to support access, logistics and exploration across the southwest Siguiri project portfolio.
Since February 2025, the company has acquired approximately 1,300km² of gold tenure across more than 23 Reconnaissance Authorisations and Exploration Permits in the Siguiri Basin.

Soil Sampling Program Design and Grid Parameters

The planned 2,239-point soil sampling program uses 200m × 200m grids at Yarakoura, Branama and Woussoubadou, and 800m × 100m grids at Moiko and Alamakono. The program is designed to refine regional anomalies identified during previous bulk leach extractable gold (BLEG) sampling conducted during 2025 and 2026. A total of 202 BLEG samples, including 20 duplicates, were collected across all eight projects during those earlier programs, with the sampling of drainage systems intended to identify gold anomalism and guide follow-up exploration towards potential mineralised sources upstream.

Yarakoura Priority Area and Regional Structural Setting

The Yarakoura Project is located immediately south of Asara Resources' Kada Project, which carries a reported 2.1 million ounce Indicated and Inferred Mineral Resource. DeSoto describes Yarakoura as a priority area for testing potential southern extensions of favourable host rocks and regional structures. The eight projects lie within the interpreted Siguiri Gold Mineralisation Trend, a regional geological and structural corridor. Regional interpretation identifies multiple prospective structural settings, including north–south sedimentary belts containing interpreted Tarkwaian conglomerates, granitoid contacts and cross-cutting northeast–southwest faults.

Timbakouna Power Auger Program Progress

At the Timbakouna project, 596 of a planned 1,195 power auger holes have been completed, according to the filing. More than 2,500 samples are currently held at the laboratory with results pending. The company also disclosed that its western permits are located 40km east of ASX:PDI's exploration permits, which include the 5.4 million ounce Bankan Deposit, originally discovered by DeSoto Chairman Paul Roberts in April 2020. Follow-up soil sampling, geological mapping and regolith assessment are planned to determine whether BLEG anomalies relate to favourable bedrock sources and to identify priorities for subsequent auger sampling and deeper drilling where warranted.

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