GBM Resources Limited (ASX:GBM) has commenced exploration drilling across multiple high-priority gold targets at its Twin Hills Gold Project in Queensland's Drummond Basin, targeting the Powerline, Flying Fox, Airstrip, L7, Stella and Feilwella prospects as part of an expanded regional exploration program.

Key Points

  • Exploration drilling is underway at six prospects — Powerline, Flying Fox, Airstrip, L7, Stella and Feilwella — at the Twin Hills Gold Project in Queensland's Drummond Basin.
  • A portable PPB's detectORE™ mobile laboratory has been commissioned onsite for rapid assay test work covering reverse circulation drilling, soils and rock chips.
  • A project-wide airborne electromagnetic survey over Twin Hills has commenced, partially funded by the Queensland government.
  • Several targets are supported by historical gold intersections, including 11m @ 1.70g/t Au and 14m @ 1.75g/t Au at Powerline, and 1m @ 43.9g/t Au from 116m at the same prospect.

Regional Exploration Strategy at Twin Hills

According to the filing, the current drilling program represents an expansion of GBM's exploration strategy beyond the established 309 and Lone Sister deposits at Twin Hills. The company said the program targets prospective mineralised systems identified through the integration of historical gold intersections, recently acquired high-resolution geophysics, geochemistry and an evolving geological model. A large pipeline of prospective gold targets has been identified across Twin Hills, with numerous targets located within major structural corridors and magnetic lows interpreted to represent significant hydrothermal alteration systems.

Historical Gold Intersections at Priority Prospects

The filing disclosed several significant historical intersections at the targeted prospects, all drilled initially pre-2000 and not followed up since. At Powerline, historical drilling returned 11m @ 1.70g/t Au from 24m including 2m @ 3.38g/t Au from 25m, and 14m @ 1.75g/t Au from 19m including 10m @ 2.18g/t Au from 19m. At Airstrip, results included 1m @ 10.0g/t Au from 154m. At Feilwella, drilling returned 2m @ 2.52g/t Au from 44m, while at Stella, intersections included 2m @ 2.18g/t Au from 96m within the same structural corridor and volcanic-sedimentary basin as the 309 deposit.

Geophysical Survey and Exploration Model Development

The filing states that a project-wide airborne electromagnetic survey over Twin Hills has commenced, partially funded by the Queensland government, with historical airborne EM surveys having previously delineated both the 309 and Lone Sister deposits. Geochemical work has identified arsenic and antimony as pathfinder elements above low-sulphidation epithermal gold mineralisation, while uranium, lanthanum, cerium and zirconium are being assessed as indicators of prospective rhyolitic magmatism. The company said ongoing interpretation of high-resolution magnetic, radiometric, IP data and surface geochemistry will continue to be used to generate, rank and prioritise additional targets across Twin Hills.