10/12/2021
South Australia’s National Virtual Core Library node continues to grow.
The Geological Survey of South Australia has added more than 45 km of new spectral data from the South Australian HyLogger™ 3 to the National Virtual Core Library in the last financial year despite some downtime due to COVID-19 and sourcing of HyLogger replacement parts.
The second half of 2021 has seen over 3,600 m of core scanned for a range of projects including:
- About 300 m of historical cores from Kapunda looking at the alteration mineralogy associated with copper mineralisation.
- About 600 m from Menninnie Dam using the spectral mineralogy to characterise the deposit and understand the distribution and cause of bimodal white mica wavelengths.
- About 650 m for the National Drilling Initiative testing the prospectivity of the basement underlying the Murray Basin. The focus was around the Meninge area searching for further copper mineralisation in Kanmantoo Group sediments.
- About 2,240 m from co-funded drilling (PACE) from several areas across the state:
- 5 drill cores from the Musgrave Province testing the prospectivity for base metals in the Giles and Birksgate complexes
- several holes located northeast of the Peak and Denison Ranges targeting Broken Hill style mineralisation
- 4 cores located to the north of Lambina testing conductive structures in the search for sulfide mineralisation.
- Characterising sediments from the Officer Basin with the aim of modelling the spectral results from the drill cores in the coming months.
- Rescanning of drillhole SR13/2 (SA Geodata drillhole 16794) in the Adelaide Rift Complex to provide thermal infrared data (originally scanned with HyLogger 1).
- The imagery and spectral data for 24 drillholes has also been replaced using the latest software. Standard batch scalars (white mica wavelengths, hematite–goethite ratios and chlorite wavelengths) were applied.
Core tray image from DD12COP014 (284465), Tray14, displaying the distribution of metamorphic minerals identified in the thermal infrared (6,000–14,500 nm) range. Minerals are dominantly pyroxene (augite) and garnet (almandine) with plagioclase (orthoclase) and biotite. (Photo 418468)
To view and download the latest spectral geoscience data visit either:
– Georgina Gordon, December 2021
