Moho narrows down search for nickel sulphides at Black Swan

Moho is closing in on the nickel sulphide prize at its Black Swan South project with assays from recent drilling pointing the way to a prospective mineralised corridor.

The 1,914m reverse circulation drill program, which tested an underexplored komatiite sequence less than 5km south of the Silver Swan-Black Swan nickel mine, identified a depression at the southern part of the prospect that could potentially develop at depth into a channel hosting nickel sulphide mineralisation.

Moho Resources (ASX:MOH) notes that while the komatiite sequence is closed off to the northwest, it remains open at depth and plunges steeply to the southeast.

Top results are 16m grading 3,828 parts per million (ppm) nickel and 75ppm copper in the saprolite zone from a down-hole depth of 32m (BSSMRC010) and 4m at 1,490ppm nickel and 31ppm copper in fresh rock from 80m in BSSNRC003.

Assays have also defined three different ultramafic units within the Black Swan South komatiite sequence while four subtle coincident nickel-copper anomalies are found to align in a discrete horizon about 45m above the footwall contact depression.

Adding further interest, passive seismic surveying has further delineated the deep weathering zone, showing the deepest weathering to be 100m west northwest of BSSMRC002 which intersected a very deeply weathered profile with 150m of saprolite.

“Moho’s exploration team has successfully defined the Black Swan South komatiite complex and outlined the topography of the footwall contact,” managing director Ralph Winter said.

“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.”

Future activity

Moho plans to carry out aircore drilling to test the deep weathering zone and footwall lithologies for komatiites below the Black Swan South complex.

It will also carry out a 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.

This article was developed in collaboration with Moho Resources, a Stockhead advertiser at the time of publishing.

This article does not constitute financial product advice. You should consider obtaining independent advice before making any financial decisions.