(various percentages of contiguous tenements)
The Arunta West Project is located 600 kilometres west of Alice Springs in Western Australia and is strategically positioned between the Pokali copper prospect to the west and Independence Group Limited’s (ASX:IGO) Lake MacKay project hosting several copper-gold and nickel-cobalt prospect discoverie to the east.
The project is in joint venture with Jervois Mining Limited (ASX:JRV 49%) (ASX:NWM 51%-manager, earning 80%), and takes in three tenements covering 345km² of the prospective Lake Mackay district of Western Australia. Norwest also holds 100% interest in two tenements adjoining the Arunta West JV area covering an additional 1,100 square kilometres and the Company has recently acquired 85% of a 250km² tenement located immediately south of the North Dovers anomaly.
In May of 2019, three diamond holes totalling 1,524 metres were drilled into the North Dovers iron-oxide-copper-gold (IOCG) target. The HQ and NQ drill core show encouraging signs of IOCG potential including hematite altered granites located adjacent to highly magnetic diorite units plus minor amounts of chalcopyrite (primary copper mineralisation), sphalerite (primary zinc mineralisation), and pyrite (iron sulphide)1.
Norwest followed-up the North Dovers diamond drilling with RC drilling which was spaced to cover the entire North Dovers target zone using a 1000m x 500m grid pattern. In September 2019, Norwest commenced RC drilling and in December received the final multi-element assay results from the 82 hole, 12,330m programme covering the large 8 x 4 kilometre magnetic-gravity anomaly.
Multi-element assaying of the RC samples identified anomalous copper values including 2m @ 1966 ppm copper from 57 metres in hole NDR1950 located at the northwest corner of the drilling grid. Hole NDRC1949, located at the most southern edge of the grid, intersected anomalous values of copper and zinc within 70m of surface as displayed on the maps below.
Although the RC drilling encounter significant hematite altered granites, large structures and anomalous copper & zinc mineralisation, it did not intersect the brecciation and massive sulphides critical for hosting an IOCG deposit. Nevertheless, the widely spaced (1000 x 500 metre) drill pattern leaves significant area between the drill centres to host a substantial IOCG system.
Norwest is currently merging the new drilling information with existing geological and geophysical data to enhance the technical information to be use in drill targeting IOCG and other styles of gold & base metal mineralisation at North Dovers.
Low Level Gold-in-Soils Sampling
In 2019 the Company collected 3,330 soil samples across a 400 x 400 metre grid and analysed by XRF in the field for base metal anomalism. These samples were later reanalysed by Genalysis laboratories for low level (part per billion-ppb) gold.
The ppb gold-in-soil analysis has identified several significant anomalies including a large 3 x 6-kilometre target area located west along strike of the new Arcee gold prospect discovered by the Independence Group JV (IGO) from their low-level gold-in-soil work.
In 2020 Norwest plans to conduct a 200m x 50m infill soil sampling programme across the new (3 x 6-km) gold anomaly to identify potential drill targets.
Independence Group (IGO) along with their smaller joint venture partners hold a 19,000km² ground position immediately east of Norwest’s Arunta West project with their western tenements surrounding the North Dover IOCG anomaly. The IGO joint venture has reported multiple strikes of gold (Au), copper (Cu), lead (Pb) and zinc (Zn) as well as nickel (Ni)-cobalt (Co) at prospects along strike of Norwest’s Arunta West project tenements2. The IGO JV recently announced the identification of the Arcee gold prospect from low level gold-in-soil sampling with follow-up RC drilling intersecting 12m @ 3.5g/t gold from 112 metres.
1. ASX Announcement NWM 18 June 2019: “Drilling reaffirms Arunta West Project’s iron-oxide-copper-gold (IOGC) potential”
2. ASX:PRX – Quarterly Report for the 3 months ended 30 June 2019