Norwest’s down-hole electromagnetic surveys point the way for future Bali drilling

Oct 27, 2022 | News

Norwest has started the down-hole electromagnetic surveys of five selected drill holes at its Bali copper project in Western Australia to help guide planning for future drilling.

This is aimed at collecting data from EM conductors near the five test holes with subsequent modelling used to define location, extent, and orientation of potential hosts to copper and other base metal mineralisation for future drilling.

Laboratory assaying of the selected DHEM holes has also been given priority to coincide with the completion of the DHEM modelling study expected in mid-November.

It comes after handheld portable XRF readings, which are in no way a replacement for laboratory assays, indicated that Norwest Minerals’ (ASX:NWM) 33 hole reverse circulation drill program had intersected broad intervals of copper mineralisation in all four tested targets.

Additionally, the pXRF analyser detected significant levels of lead and zinc in addition to copper at the Bali High prospect.

Chief executive officer Charles Schaus said the information from drill holes and DHEM will be used to plan drill hole targeting of zones along the Bali shear which have the potential to host economic copper mineralisation.

DHEM survey and other work

Holes BRC004, BRC016, BRC018, BRC022, and BRC025 have been cased for DHEM work, which will provide a better understanding of the location, extent, and orientation of the conductors which may be host to base metal mineralisation.

Additionally, continued surface exploration across the Deep South area has located two additional veins reporting high copper values from the pXRF analyser, taking the total number of copper-rich veins up to seven.

Vein V6 is exposed for about 200m on surface where six widely spaced samples were collected and reported pXRF copper grades ranging from 4% to 44%.

Separately, while Vein V7 has limited exposure, its lone rock chip registered 56% copper.

The copper-gold quartz veins are associated with near vertical dipping, laterally extensive, narrow shears zones striking northwest-southeast parallel to the main Bali Shear.

Norwest is currently evaluating geophysical techniques to determine which will best suit detecting and analysing the subsurface characteristics of the narrow Deep South structures.

Also being considered is sub audio magnetics to investigate the Deep South area.


This article was developed in collaboration with Norwest Minerals, a Stockhead advertiser at the time of publishing.