Extensional Results Show Brolga Zone Plunge Potential
ASX:De Grey Mining Limited (ASX: DEG) has confirmed a developing plunge at the Brolga Zone within its exciting Hemi gold discovery,60km south of Port Hedland in Western Australia.
Brolga is the largest gold zone discovered at Hemi to date. Recent drilling has targeted down dip and strike extensions to the main Brolga zone, in addition to resource infill drilling.
Extensional drilling is being conducted to the west and south of the main Brolga zone. Drilling has demonstrated that the Brolga mineralised system is open at depth and along strike to the west and south.
The areas between Brolga and Brolga South and between Brolga and Falcon are currently being tested. Anomalous gold in aircore drilling between Brolga and Falcon provides further encouragement to conduct follow up RC drilling to the west of Brolga.
A very wide zone of mineralisation has been intersected in the south-west of Brolga in HERC392D. The west looking section is aligned with the drill trace of HERC392D and demonstrates the interpreted plunge of mineralisation in this area of Brolga.
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 and
Managing Director, Glenn Jardine, said DeGrey believes there is potential to extend Brolga mineralisation to the south west with further drilling. Strong mineralisation in the north west of Brolga has been intersected in HERC399 including: 57m @ 1.5g/t Au from 91m including 10m @ 6.4g/t Au from 138m
No drilling has been conducted at 40m line spacing to the east or west of HERC399 and only limited drilling at 80m line spacing has been conducted to the west of HERC399. There is potential to extend Brolga mineralisation along strike to the south, west and at depth with further drilling, which is ongoing.
The infill programme is designed to provide sufficient drill density to enable a significant portion of the maiden resource estimate to meet JORC 2012 Indicated classification. This program will continue throughout the various zones in parallel with extensional and exploration drilling programs.
Intercepts received to date have been successful in demonstrating continuity of the previous wide spaced drilling (80m x 80m). Results continue to show broad zones of consistent gold mineralisation and strong correlations between adjacent holes. Infill drilling on section 30320, 80m to east of HERC392D, include HERC387D which intersected: 40m @ 1.5g/t Au from 168m including 10m @ 5.3g/t Au from 183m Other significant infill drilling results at Brolga include:
- 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
“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,” Mr Jardine said.
“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.”
