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Nb-Ta fractionation in peraluminous granites: a marker of the magmatic-hydrothermal transition


Stepanov, AS and Meffre, S and Mavrogenes, J and Steadman, J, Nb-Ta fractionation in peraluminous granites: a marker of the magmatic-hydrothermal transition, Geology, 44 pp. e394. ISSN 0091-7613 (2016) [Letter or Note in Journal]

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DOI: doi:10.1130/G38086C.1


On the basis of geochemical and mineralogical features, Ballouard et al. (2016) argue that magmatic fractionation alone cannot explain the formation of leucogranites with low Nb/Ta ratios. Instead, they propose that low ratios are better explained by post-magmatic interaction with F-bearing fluids. Although fluids may certainly play an important role in the formation of rare metal leucogranites, the model proposed by Ballouard et al. lacks key details. We contend that the principal features they attribute to magmatic-hydrothermal processes are better explained by the magmatic fractionation model.

Item Details

Item Type:Letter or Note in Journal
Keywords:niobium, tantalum, fractionation, granites, melt
Research Division:Earth Sciences
Research Group:Geochemistry
Research Field:Exploration geochemistry
Objective Division:Mineral Resources (Excl. Energy Resources)
Objective Group:Other mineral resources (excl. energy resources)
Objective Field:Other mineral resources (excl. energy resources) not elsewhere classified
UTAS Author:Stepanov, AS (Mr Sasha Stepanov)
UTAS Author:Meffre, S (Dr Sebastien Meffre)
UTAS Author:Steadman, J (Dr Jeffrey Steadman)
ID Code:110150
Year Published:2016
Web of Science® Times Cited:11
Deposited By:CODES ARC
Deposited On:2016-07-15
Last Modified:2016-07-18

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