The Higginsville Joint Venture is managed by Argonaut Resources NL (51% earn in up to 80%) with Loded Dog Prospecting and covers a large tenement package in the Eastern Goldfields of Western Australia.
The Higginsville Joint Venture is exploring for gold and nickel within the Norseman-Wiluna Belt, a belt of ancient rocks endowed with nickel mineralisation that lies within the broader Yilgarn Craton.
Argonaut has investigated the nickel potential of the Higginsville Project following the high-grade nickel intercepts and developing operations at the nearby Cassini deposit (Figure 1).
Figure 1. Nickel prospects and bedrock geology
The mineralisation model is typical of Kambalda-style komatiitic nickel sulfide deposits, comprising Ni-Cu-PGE ores identified using geochemistry, geophysical and stratigraphic analysis. Published mapping, interpretation of the aeromagnetics and review of existing drill logs shows that an ultramafic trend continues through the Higginsville Joint Venture tenement package.
Nickel targets are located south of Higginsville near the western shoreline of Lake Cowan and have been defined by shallow auger drilling and are coincident with magnetic signatures typical of nickel-bearing geological units. Some of these ultramafics are concealed by Lake Cowan and represent an obvious target for future testing.
Field mapping and sampling is planned over the outcropping ultramafics with follow-up aircore drilling on the target zone under the edge of Lake Cowan to assist in identifying priority areas for follow-up geophysical (EM) surveys and deeper drilling.
Hayes Hill Prospect
Historic mapping of the Hayes Hill area has delineated a sequence of serpentinites, high-Mg basalt, spinifex textured talc-chlorite komatiite and gabbro intruded by minor volumes of quartz-feldspar porphyry and pegmatite or quartz aplite.
North-south trending, variably magnetic ultramafic units may be the southern continuation of the nickel-hosting Widgiemooltha ultramafics.
Historic exploration results include:
- Soil anomaly >500ppm nickel anomaly approximately one kilometre long with two discrete >1,000ppm nickel zones.
- Rock chip samples over the area contain up to 2,300ppm nickel, 735ppm copper, 2,800ppm zinc and 1,000ppm chromium within serpentinite rock units.
The Green Bananas prospect features a nickel geochemistry anomaly with auger samples returning between 0.1% ad 0.2% nickel.