De Grey Mining Limited (ASX: DEG) has reported high-grade results including 256.0m @ 0.9 g/t Au from 287m from the drilling at the Brolga gone zone within its Hemi Gold Discovery in Western Australia. The company said that the drilling also confirmed a developing plunge that remains open to the south-west.
Significant intersections from HERC392D included 256.0m @ 0.9 g/t Au from 287m, including 14.9m @ 2.2g/t Au from 294m, and 15m @ 1.1 g/t Au from 528m.
The company also reported that strong extensions were intersected in the north west of Brolga, with significant intercepts of 57m @ 1.5g/t Au from 91m, including 10m @ 6.4g/t Au from 138m in HERC399.
DEG said that anomalous gold in aircore drilling between Brolga and Falcon will require follow up RC drilling.
The company said that infill results at Brolga show strong correlations between adjacent drill holes. Highlights included 40m @ 1.4g/t Au from 57m, including 10m @ 4.8g/t Au from 57m in HERC397; and 30m @ 1.5g/t Au from 95m, including 16m @ 2.8g/t Au from 109m in HERC395.
Drilling at Brolga zone
The company had recently commenced drilling at Brolga zone within the Hemi Gold Discovery. The drilling targeted down dip and strike extensions to the main Brolga zone, in addition to resource infill drilling.
DEG said that extensional drilling was conducted to the west and south of the main Brolga zone. The company said that the infill program was designed to provide sufficient drill density to enable a significant portion of the maiden resource estimate to meet JORC 2012 Indicated classification.
High-grade results from extensional drilling
The company said that the extensional drilling demonstrated that the Brolga mineralised system is open at depth and along strike to the west and south.
DEG said that a very wide zone of mineralisation was intersected in the south-west of Brolga in HERC392D. The company said that the west looking section is aligned with the drill trace of HERC392D and demonstrates the interpreted plunge of mineralisation in this area of Brolga.
DEG reported that HERC392D intersected 256.0m @ 0.9 g/t Au (0.3g/t Au cut-off) from 294m including 14.9m @ 2.2g/t Au from 294m, 50.0m @ 1.1g/t Au from 412m, 18.0m @ 1.5g/t Au from 468m, 9.0m @ 3.1g/t Au from 497m, and 15m @ 1.1 g/t Au from 528m.
The company said that there is potential to extend Brolga mineralisation to the south west with further drilling.
The company said that the areas between Brolga and Brolga South and between Brolga and Falcon are currently being tested. DEG noted that anomalous gold in aircore drilling between Brolga and Falcon provides further encouragement to conduct follow up RC drilling to the west of Brolga.
Encouraging results from infill drilling
The company reported that intercepts received to date from infill drilling have been successful in demonstrating continuity of the previous wide spaced drilling. DEG said that results continue to show broad zones of consistent gold mineralisation and strong correlations between adjacent holes.
DEG said that HERC387D intersected 40m @ 1.5g/t Au from 168m including 10m @ 5.3g/t Au from 183m. Other significant infill drilling results at Brolga included 116m @ 0.8g/t from 144m, including 11m @ 1.0g/t Au from 174m, 6m @ 1.3g/t Au from 191m and 25m @ 1.8g/t Au from 235m in HERC600; and 30m @ 1.5g/t Au from 95m, including 16m @ 2.8g/t Au from 109m in HERC395.
Latest updates and next steps
The company said that follow up aircore drilling will be undertaken to test for strike extensions to mineralisation. DEG said that programs of follow up RC and diamond drilling aimed at extending resources at depth and laterally are underway.
De Grey Managing Director Glenn Jardine said: “Recent extensional RC and diamond drilling has been successful in identifying wide zones of mineralisation along in the west of the large Brolga mineralised system and remains open to the south, west and at depth. Higher grade intervals within the larger mineralised system have also been intersected. RC drilling is in progress to extend mineralisation further between Brolga and Brolga South and between Brolga and Falcon.
Results of infill drilling continue to show broad zones of consistent gold mineralisation and strong correlations between adjacent drill holes. The infill program is designed to provide sufficient drill density to enable a significant portion of the maiden resource estimate to meet JORC 2012 Indicated classification.”
*Image Source: De Grey Mining Limited