Drill Results Confirm Significant Gold System
Great Northern Minerals Limited (ASX: GNM) believes it has unlocked the potential for a large gold resource at its Big Rush Project in Queensland with gold mineralisation confirmed and extended by its latest drilling programme there.
The company is now in receipt of all of the final one metre resplit samples from a Reverse Circulation (RC) drilling programme at the Big Rush Gold Project in Northern Queensland.
The total recent drilling at Big Rush comprised 22 RC holes for 3,634 metres spread over approximately 900m of strike underneath the southern, central and northern previously mined shallow open pits. Drill hole depths ranged from 110 to 250 metres depth and averaged 165 metres.
Managing Director, Cameron Mclean, said the one metre results have highlighted higher grade gold zones lying within a number of the larger lower grade mineralised zones and provides a clear focus for targeted deeper diamond drilling designed to test at depth these higher-grade intersections.
“The one metre results have confirmed the potential for very high grades to extend to significant vertical depth, particularly underneath the Central Pit,” Mr Mclean said.
“Results from underneath the Northern Pit are pointing to excellent further potential in this area and the planned deeper diamond drilling programme which is about to commence is designed to test for extensions of the higher grade gold results.
“Anomalous gold mineralisation at Big Rush is now documented to occur over at least one kilometre of strike, with additional strike extensions apparent.”
Mr Mclean said a number of high grade gold results have been returned including 1m @ 81.68 g/t Au, 3m @ 21.73 g/t Au and 2m @ 17.16 g/t Au, all located within larger lower grade mineralised zones which are planned to be followed up with a diamond drilling program due to commence shortly.
Planning for a deeper diamond programme is well underway and due to commence in the second week of October. Initially four diamond holes (and precollars) to an approximate depth of 260m are planned underneath the central pit and one diamond hole to a similar depth is planned underneath the northern pit. Mr Mclean said this will allow detailed interpretation of the diamond core, provide representative samples for metallurgical testwork and allow for greater knowledge leading to an updated JORC 2012 estimate for the Big Rush gold deposit early in 2021.
