Mamba Exploration Limited’s (ASX:M24) second drill hole (21BHRC002) drilled at the Black Hills priority target in Western Australia has intersected multiple zones of disseminated to blebby sulphide mineralisation.
Managing Director, Mike Dunbar said, visual logging has been completed on the second hole, which intersected a mafic / ultramafic intrusion and metagranite.
“After intersecting sulphides in the first hole, it is pleasing to be able to announce the discovery of multiple zones of sulphide mineralisation within the second hole drilled at the Black Hills priority EM and magnetic target,” Mr Dunbar said.
“It is encouraging that we have intersected poly-phased (mixed) sulphides which appear to be magmatic in origin. There are multiple zones with interstitial disseminated to blebby sulphides within a mafic / ultramafic intrusion, which is an indication of a fertile intrusion with magmatic sulphides. As a result of the intersections in the first two holes, we have decided to drill the last hole as a diamond hole to gather more geological and structural data on the system.
“As I mentioned in the announcement of sulphides being intersected in the first hole, the significance of the mineralisation is yet to be fully understood, however with the samples already submitted into the laboratory for analysis and the downhole EM that has been completed and is currently being processed, the significance will be better understood in the next few weeks.”
The zones of mineralisation are within zones of predominantly gabbronorite and contain poly phase (mixed) magmatic sulphides of pyrrhotite and minor chalcopyrite. Samples from the second hole have been submitted to the laboratory in Perth for analysis, and results are expected in around four weeks.
Given the success of the first two holes, the third hole is going to be completed using a diamond core tail after a RC pre-collar of 61 metres was completed. The decision to change drilling type has been as a result of the initial holes intersecting sulphides and needing to better understand the geological and structural system that is hosting the sulphide mineralisation. Drilling will be undertaken early in 2022.
In addition to the drilling, the downhole EM on the first two holes was completed yesterday, with processing of the data underway. It is expected that the processing will be finalised in the next few weeks, which will assist with planning the diamond drilling of hole three and any further drilling targeting any downhole EM conductors identified.
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