Moho Resources Ltd (ASX:MOH) has made strong nickel sulphide exploration progress at Black Swan South nickel prospect, 40 kilometres northeast of Kalgoorlie in Western Australia.
The company’s exploration program has aimed to test an under-explored komatiite sequence less than five kilometres south of Poseidon Nickel Ltd (ASX:POS, OTC:PSDNF)'s Silver Swan-Black Swan nickel operations.
During the program, the topography of komatiite footwall contact was intersected by 10 drill holes which show a depression at the southern part of the prospect that could potentially develop at depth into a channel hosting nickel sulphide mineralisation.
Notably, assays define three different ultramafic units within the Black Swan South komatiite sequence, although little nickel sulphides were intersected in this program.
The depression in the footwall contact with the overlying coincidental nickel-copper horizon has the potential to develop into a channel hosting nickel sulphide mineralisation.
"Encouraging development"
Moho managing director Ralph Winter said: “Moho’s exploration team has successfully defined the Black Swan South komatiite complex and outlined the topography of the footwall contact.
“The definition of a very deeply weathered profile not unlike the deep weathering overlaying the nearby Silver Swan massive nickel sulphide deposit is also an encouraging development.
“Further investigations will be aimed at defining the depth constraints of the nickel sulphide potential at Black Swan South and testing the potential of the area west of the current completed program.”
Drill hole location plan.
Drill program
Moho has completed 1,914 metres of reverse circulation (RC) drilling across 12 drill holes during its latest exploration program.
The komatiite sequence closed off to the northwest but remains open at depth and plunges steeply to the southeast.
Notably, the four subtle coincident nickel-copper anomalies align in a discrete horizon about 45 metres above the footwall contact depression.
Best assays include:
- BSSMRC010: 32-48 metres averaging at 3,828ppm nickel and 75ppm copper (saprolite zone); and
- BSSNRC003: 80-84 metres at 1,490ppm nickel and 31ppm copper.
The passive seismic survey has further delineated the deep weathering zone, showing the deepest weathering to be 100 metres west-northwest of BSSMRC002.
Forward plan
Moho is planning an aircore drill program to test the deep weathering zone and footwall lithologies for komatiites below the Black Swan South complex.
The program of works (POW) is submitted to DMIRS for approval.
Further review of available data on prospective depression in footwall contact with the overlying coincidental nickel-copper horizon prior to further geophysical surveys and drilling