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The key role of mica during igneous concentration of tantalum

Stepanov, Aleksandr; Mavrogenes, John; Meffre, Sebastien; Davidson, Paul


Igneous rocks with high Ta concentrations share a number of similarities such as high Ta/Nb, low Ti, LREE and Zr concentrations and granitic compositions. These features can be traced through fractionated granitic series. Formation of Ta-rich melts begins with anatexis in the presence of residual biotite, followed by magmatic crystallization of biotite and muscovite. Crystallization of biotite and muscovite increases Ta/Nb and reduces the Ti content of the melt. Titanium-bearing oxides such as...[Show more]

CollectionsANU Research Publications
Date published: 2014
Type: Journal article
Source: Contributions to Mineralogy and Petrology
DOI: 10.1007/s00410-014-1009-3


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