De Grey Mining has expanded its drilling activities at the Hemi discovery in Western Australia.
Gold mineralisation at Hemi is hosted in a series of intrusions associated with stringer and disseminated sulphide rich zones, a style that’s new to the Pilbara region.
De Grey has increased its number of aircore and reverse circulation (RC) rigs on site, with three operating between Aquila, Brolga and Crow zones now.
The company is looking to expand aircore drilling coverage immediately around Hemi and at nearby intrusions such as Scooby, Shaggy and Antwerp.
De Grey is also testing for extensions of the gold mineralisation with a second RC due shortly.
Drilling extension at Aquila had produced results including 41 metres at 6.8 grams a tonne of gold from 181 metres, and 16 metres at 1.6 grams a tonne from 144 metres.
Its significant depth extensions include 69.5 metres at 1.3 grams a tonne of gold from 80 metres.
This builds on De Grey’s major extension on aircore drilling at the Brolga intrusion, with results of initial shallow aircore holes including 16 metres at 2.4 grams a tonne from 40 metres, and eight metres at 2.2 grams a tonne from 52 metres.
De Grey stated that the extension enhanced the potential to expand near surface open pit resources.
“At Aquila, we still have not reached the limits of mineralisation,” De Grey technical director Andy Beckwith said.
“Step out drilling shows we are still in strong broad and high grade mineralisation along the length of the deposit.
“Deeper RC and diamond drilling is planned to target approximately 100 metres below mineralisation as well as further extensions along strike.”
De Grey plans to dispatch samples from the aircore holes for assaying this week.