eCite Digital Repository
The key role of mica during igneous concentration of tantalum
Citation
Stepanov, A and Mavrogenes, JA and Meffre, S and Davidson, P, The key role of mica during igneous concentration of tantalum, Contributions to Mineralogy and Petrology, 167, (6) Article 1009. ISSN 0010-7999 (2014) [Refereed Article]
Copyright Statement
Copyright 2014 Springer-Verlag Berlin Heidelberg
DOI: doi:10.1007/s00410-014-1009-3
Abstract
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 rutile and titanite are
enriched in Ta and have the potential to deplete Ta at early
stages of fractionation. However, mica crystallization suppresses
their saturation and allows Ta to increase in the melt.
Saturation with respect to Ta and Nb minerals occurs at the
latest stages of magmatic crystallization, and columbite can
originate from recrystallization of mica. We propose a model
for prediction of intrusion fertility for Ta.
Item Details
Item Type: | Refereed Article |
---|---|
Keywords: | rare metal, deposit, biotite, muscovite, granite fractionation, anatexis, granite classification |
Research Division: | Earth Sciences |
Research Group: | Geology |
Research Field: | Igneous and metamorphic petrology |
Objective Division: | Expanding Knowledge |
Objective Group: | Expanding knowledge |
Objective Field: | Expanding knowledge in the earth sciences |
UTAS Author: | Stepanov, A (Mr Sasha Stepanov) |
UTAS Author: | Meffre, S (Dr Sebastien Meffre) |
UTAS Author: | Davidson, P (Dr Paul Davidson) |
ID Code: | 94714 |
Year Published: | 2014 |
Web of Science® Times Cited: | 97 |
Deposited By: | Centre for Ore Deposit Research - CODES CoE |
Deposited On: | 2014-09-16 |
Last Modified: | 2017-11-02 |
Downloads: | 0 |
Repository Staff Only: item control page