Highlights

  • Drilling at Lone Sister confirms new high-grade mineralisation beyond existing resource estimate.
  • Two distinct gold mineralisation styles identified, including intrusive-related gold zones.
  • Further drilling underway at Twin Hills’ 309 deposit with assays pending.

GBM Resources Limited (ASX:GBZ) has reported encouraging assay results from its initial drilling program at the Lone Sister deposit, part of the Twin Hills Gold Project located in Queensland’s Drummond Basin. The company received results from two of three drillholes, revealing significant gold intercepts outside the existing 1.0Moz Mineral Resource Estimate (MRE).

The drilling follows GBM’s corporate restructuring in August 2025 and forms part of a broader campaign aimed at expanding the current resource and exploring high-priority extensions across the Twin Hills project, including the 309 and Lone Sister deposits.

Significant Gold Intercepts Outside Current Resource

Drillhole LSDH002 returned multiple notable intersections, including:

  • 52m @ 2.77g/t Au from 299m,
  • 14m @ 1.19g/t Au from 60m (including 2m @ 4.71g/t Au from 67m), and
  • a peak interval of 1m @ 43.04g/t Au from 300m.

These results form part of a broader zone of 181.7m @ 1.55g/t Au from 189m, including 89m @ 1.28g/t Au from 189m, which lies beyond the existing MRE boundary.

Additionally, LSDH001A recorded 10m @ 4.33g/t Au from 442m, including 5m @ 6.18g/t Au from 446m. Both holes also confirmed a newly interpreted east-west structure associated with high-grade mineralisation, which had not been previously identified or targeted.

Two Styles of Gold Mineralisation Identified

The company’s first-ever north-to-south (LSDH001A) and south-to-north (LSDH002) drill orientations at Lone Sister provided new geological insights. Results indicate two distinct styles of high-grade gold mineralisation:

  1. Quartz vein low sulphidation epithermal type, and
  2. A newly identified mineralised rhyolite, characteristic of intrusive-related gold systems.

This discovery enhances geological understanding and supports the potential for resource expansion within and beyond the existing MRE.

Next Steps in Exploration

GBM has completed approximately 1,500m of its planned 6,550m drilling program at the 309 deposit, with assay results currently awaited. The company has also planned an additional hole at Lone Sister to further assess the continuity of the newly identified high-grade east-west structure.

Share Performance of GBZ

GBZ was trading 9.756% lower at AUD 0.037 per share as of 12 November 2025 at the time of writing.