Henrietta Nickel Project

The Henrietta Nickel Project is a newly identified nickel-sulphide target located within the Hibbs Ultramafic Belt in the northern part of EL6/2013. Historically the Hibbs Belt has been found to contain anomalous, nickel, chrome, osmiridium and gold. Reconnaissance mapping in the 1970’s by BHP identified visible pentlandite (nickel sulphide) in ultramafic outcrops in an area 2 kilometres south-southwest of the Henrietta target. Highly anomalous stream sediment geochemistry surrounding the Hibbs Ultramafic Belt has been reported, and in the early part of the 19th century, osmirdium (a rare platinum group ore) and gold was panned from outwash areas associated with the ultramafic outcrops. 

Reprocessing of recent airborne electromagnetic (EM) data by Sherlock identified a strong, late-time conductivity anomaly with a strike length in excess of 1.3 km, the Henrietta Prospect. Due to the complex signal response of this anomaly this feature, had not been identified or ground checked by the previous explorer who commissioned the airborne electromagnetic survey.

Typical EM profile and magnetic response for the Henrietta Prospect.

Sherlock has undertaken a single reconnaissance traverse out to the approximate centre of the 1.3 km long Henrietta target and located highly weathered gossanous float coincident with the peak of the EM response. The float material comprised massive secondary iron oxides, partially silicified, and some quartz vein material with box work textures. Laboratory analysis of this material returned assays of 0.11 % nickel and 52 ppb platinum.

Ground EM geophysics are planned to precisely model the target conductor in the sub-surface ahead of drill testing.

Geological map with priority 1 EM targets (red circles).
Deeply weathered (leached?) iron oxide and quartz gossan samples which assayed 0.11% Ni & 52ppb Pt, Henrietta Prospect.