The Mt. Cattlin spodumene pegmatite group is located on the southernmost edge of the Archean Yilgarn Craton in Western Australia. These pegmatites intrude the Neoarchean Manyutup Tonalite and adjoining Annabelle Volcanics. Locally, the Annabelle Volcanics are dominated by a sequence of interlayered metabasalt and metadolerite. The host rocks are metamorphosed to amphibolite facies. These pegmatites are located within the hinge zone of the major regional Beulah Synform, with local terranes comprised of metavolcanics and metasediments folded around the synform.

Recent dating by Dittrich et al. (2016) of white micas by an Ar-Ar method and Sn-Ta-Nb minerals by U-Pb isotopic...

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