De Grey Mining Limited (ASX: DEG) has returned “encouraging” aircore drilling results from the Mallina deposit in the Pilbara region of WA, including the discovery of several new gold lodes.
The company’s Technical Director, Andy Beckwith, said the new lodes include highly encouraging wide and high grade gold mineralisation well outside the current resource areas. He said the new lodes demonstrate the potential for Mallina to host multiple sub-parallel lodes within a 700m wide corridor.
They also provide the potential to substantially increase resources. In many cases, the new aircore intersections are open for at least several hundred metres along strike.
Results for four metre composite sampling of the aircore drilling include:
40m @ 3.9g/t Au from 8m incl 8m @ 9.2g/t Au and 12m @ 5.6g/t Au; 28m @ 2.6g/t Au from 40m incl 4m @ 5.4g/t Au; 32m @ 1.6/t Au from 16m incl 4m @ 5.8g/t Au; 20m @ 1.7g/t Au from 4m incl 8m @ 3.4g/t Au; and 24m @ 0.9g/t Au from 0m.
“The new aircore drilling results are very encouraging and support our aggressive drilling campaign aiming to substantially increase resources,” Mr Beckwith said.
“These new gold zones represent wide zones of new mineralisation well outside of the existing resource and importantly at shallow depths. The along strike potential remains open and follow-up aircore and RC drilling programs are already underway at Mallina, as they have the capacity to materially increase resources.
Drilling for the remainder of 2019 will focus on resource extensions at Mallina, Withnell and Toweranna as our highest priority, together with a substantial aircore drilling programme targeting new discoveries along the major highly prospective shear zones and intrusive targets in our large Pilbara Gold Province land position.”
The recently completed programme of widely spaced aircore drilling at Mallina comprised 104 holes, totalling 6,305m.
Drilling was undertaken on lines 200-400m apart, with holes spaced 40m on section. The drilling targeted new SAM geophysical targets and structural interpretation beneath the thin veneer of transported cover. Two sections were drilled 1.8km and 3.0km west of the Mallina resource area with holes at 80m intervals, along an interpreted extension of the Mallina Shear Zone corridor based on aeromagnetics.
A fence of aircore drilling 1.8km west and along strike of all previous drilling intersected 8m @ 1.1g/t Au. This is interpreted to be an extension of the Mallina mineralised corridor.
This result is complimented by other anomalous intercepts (4m @ 0.53g/t Au from 16m and 8m @ 0.64g/t Au from 52m in MLAC098) on the same section, in addition to 4m @ 0.3g/t a further 1.2km to the west again.
These new results extend gold mineralisation an additional 3km to the west, increasing the prospective mineralised corridor to 7km long x 700m wide and remains open along strike.