CORE Geophysics and Drilling Collaborations Round 9 2016 Berjaya NW EL 26831

Abstract

Drillhole NB16DD018 was drilled between September 1st and September 6th by MMG Ltd as part of Round 9 of the Northern Territory Geophysics and Drilling Collaborations program. The target rationale was to test an untested area on the northern fringe of the 'HYC camp' along strike from sub-economic Zn mineralisation drilled historically within the Barney Creek Formation at the Berjaya Prospect located 16km west of the McArthur River Mine. The hole aimed to ascertain the style of mineralisation (as historical drill core cannot be located) and to test if the mineralised system improves northward which has the potential to open up a prospective exploration area. The 404.4 m deep diamond drillhole was collared in the Hot Springs Member of the Lynott Formation, intersected the entire thickness of the target stratigraphy, i.e. the Caranbirini Member of the Lynott Formation, the Reward Dolomite and the Barney Creek Formation, and was terminated in the Teena Dolomite (including the Coxco Dolomite Member). A 33.2 m thick interval of weak zinc mineralisation averaging 2359 ppm Zn was intersected from 180 m depth and can be correlated with mineralisation intersected in historical holes at the Berjaya Prospect further south. The mineralisation was dominantly sphalerite and pyrite with traces of galena and occurred as disseminations, aggregates, thin deformed bands and as breccia infill. The mineralised interval included a 5.9 m thick interval assaying at 0.47 % Zn. Lithological logging, downhole assays and subsequent 3D modelling from NB16DD018 indicate that the thickness and grade of the weakly mineralised interval both decrease to the north when compared to historical drilling at the Berjaya prospect. This finding, in conjunction with the target horizon becoming gradually deeper to the north downgrades the prospectivity of the area to the north.