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Kimba Gap (Stony Hill)
Kimba Gap
The Stony Hill Project is located on the western side of the Middleback Ranges within the Middleback Subdomain and contains scattered BIF outcrops surrounded by Lincoln Complex granite gneiss. Exposure of Hutchison Group rocks is poor.
BIFs are associated with other Hutchison Group units including the Katunga Dolomite, calcsilicate gneisses similar to Menninnie Dam and a pyritic sulphide-rich iron formation at the base of the Lower Middleback BIF sequence in the Middleback Ranges. There is potential for gold and/or base metals within these units but, to date, there has been little recorded gold or base metal exploration within these tenements.
A detailed low-level combined aeromagnetic and radiometric survey was flown in early 2007 and identified significant radiometric uranium-only anomalies in the Kimba Gap area on the western edge of local salt pans. These anomalies will form the focus of early exploration in this project area.
The Stony Hill project is located in northern Eyre Peninsula, immediately west of the Middleback Ranges within the Middleback Subdomain. It contains scattered banded iron formation (BIF), marble and calcsilicate gneiss similar to the Menninnie Dam lead-zinc-silver deposit surrounded by Lincoln Complex granite gneiss. BIF, marble and gneiss are overlain by extensive sand and sandy clay with local playa lakes.
Granite gneiss in the region is locally uraniferous with numerous mylonitic shear zones similar to southern Eyre Peninsula. There is potential for uranium mineralisation within the granite gneiss, particularly within shear zones, and in palaeodrainage channels that drain from the gneisses.
A low-level (50m above ground level), close-spaced (100m) aerial magnetic and radiometric survey was completed over the Stony Hill project area by UTS Geophysics in late February 2007. Detailed processing and enhancement of the aeromagnetic and radiometric data has identified several uranium and uranium/thorium anomalies, the best being on the margins of salt lakes west of Kimba Gap.
Reconnaissance field checking with a hand-held spectrometer around the margins of one of the lakes with high U/Th ratios located two significant zones of uranium anomalism that are interpreted to represent the points where palaeodrainage channels enter the lake.
Follow-up surface sampling, geophysical surveys and RAB or auger drilling will be undertaken over the Kimba Gap target.