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Deposit Synonyms
Dovetail; Red Tail; Yellow Tail
Mineral District
Deposit Summary
Deposit Description
Work completed by Australian Rare Earths on the Koppamurra Project has confirmed the presence of laterally extensive REE mineralisation at Koppamurra. The ionic clay hosted REE mineralisation at Koppamurra is hosted by clayey sediments interpreted to have been deposited onto a limestone base (Gambier Limestone) and accumulated in an interdunal, lagoonal or estuarine environment which has been extensively mapped east of the Kanawinka fault in south-east South Australia. A dedicated post-doctoral research program investigating the source of the REE at Koppamurra is ongoing, with no definitive source of the REE confirmed to date although preliminary results of this study have ruled out the alkali volcanics in south-eastern Australia which was originally considered as a potential source. Mineralogical test work conducted on clay samples from the project area established that the dominant clay minerals
are smectite and kaolin, and that the few REE-rich minerals detected during the scanning electron microscope (SEM) investigation were not considered inconsistent with the suggestion that a significant proportion of REE are distributed in the material as adsorbed elements on clay and iron oxide surfaces.
Total Measured + Indicated + Inferred resource is 236 Mt @ 748 ppm TREO with a cut-off grade of 325 ppm
Discovery Year
~ 2020
Commodities
Rare Earths
Ore Minerals
Gangue Minerals
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