Wolfe Basin covers 780km² of unexplored ground in the Kimberley region, Western Australia. Sipa has identified sediment-hosted base metal and intrusive-hosted nickel targets, with the initial focus being sediment-hosted base metals.
A comprehensive mineralisation model has been used in the hunt for sediment hosted base metals based on the movement of metal bearing fluids, driven against basement highs by east-west tectonic compression. Transported metals are subsequently deposited into suitable chemical (e.g. carbonaceous shales, carbonate units) and structural (fault and fold dilatancy) traps and is broadly similar to that underpinning copper mineralization found in the African Copper Belt.
The Wolfe Basin project contains all the expected elements for this model (Table 1), and it was on the basis of these elements that the project area was originally targeted. Some elements such as evaporitic sequences as a precursor to saline fluid development have not been identified specifically within the project area but are present regionally or immediately adjacent to the project.
At Wolfe Basin, the prospective horizon has a strike length of more than 80km, with anomalous base metals observed in soil sampling for at least 20km and two outcropping gossanous ironstones along the target horizon the logical targets for initial investigations. Prior to Sipa’s work, the area had not been the focus of any previous documented exploration or drilling.
Sipa recently completed a dipole-dipole induced polarisation (DDIP) survey over the Romulus prospect where Sipa completed an RC drill program in late 2020.The DDIP detailed a distinct, chargeable feature at approximately 150-200m below surface immediately to the east of previous drilling, which is also visible on the DDIP lines to the north and south of where drilling was completed.
The goal of the DDIP survey was to provide a cross-sectional view of any electrically chargeable bodies such as sulphide accumulations, and assist in refining the next drill program at Wolfe Basin, which will target both base metal sulphides that may exist down-dip below the weathered zone encountered in the 2020 program as well as the newly identified DDIP targets.