Over 110 new datasets available.

Spectral scanning of drill core in October and November 2022 has seen another 5,380 m of drill core added to South Australia’s National Virtual Core Library (NVCL) node. These range from Geological Survey of South Australia (GSSA) GP2: next generation minerals systems mapping and Source to Sink projects to rare minerals donated by Keith Johns (former director general) and family including laumontite (a rare zeolite) from Arkaroola, kyanite (unknown source) and willemite from Beltana.

GSSA Discovery Day 2022 provided an opportunity for Alicia Caruso to present some of her latest work on thermal infrared data. Watch the video: Seeing in the dark: mafic rock mineralogy revealed by thermal infrared HyLogger analysis.

To view and download the latest spectral geoscience data visit either:

Figure 1

The sulfide index, a parameter collected during HyLogging, uses the thermal infrared offset to measure bright features in drill core or in core trays. It can be used as a relative measure of the presence of sulfides. Here it is applied to drillhole ACEDD003, Acacia East prospect, 50 km east of Challenger gold mine. The sulfide index is coloured by a simplified lithology log with company sulfur assay results overlain in blue demonstrating the close relationship between the higher values of the sulfide index and the geochemistry. The core imagery shows the different proportions of sulfides identified.

– Georgina Gordon and Alicia Caruso, December 2022

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