Comalco Ltd took up EL1/71 over Cape Sorell in 1971, to explore the potential of the Rocky Cape Group quartzite as a source of silica for silicon metal manufacture. Diamond drilling atseveral sites showed that the quartzites were indeed of high purity, and produced a resource estimate of
2.78 Mt at 99.13% SiO2, 0.34% Al2O3, 0.05% Fe2O3
1. 71_0787 - Cape Sorell Quartzite Project, Cape Sorell Peninsula - Western Tasmania, Geological Report.
2. 75_1083 - Proposals and `Indicated` Quartzite Ore (Not Reserves) - Cape Sorell, Western Tasmania.
3. 75_1092 - Silicon Smelter at Cape Sorell, Tasmania, Technical Description
4. 78_1252 - Final Report Tasmanian Exploration Licence No. 1/71 at Cape Sorell.
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