Constraining the presence of amphibole and mica in metasomatized mantle sources through halogen partitioning experiments

We present experimentally determined partition coefficients (Dmin/melt) for F and Cl between pargasite (amphibole), phlogopite (mica), clinopyroxene and basanitic melts. All experiments were performed at 1.4 GPa and temperatures between 1015 °C and 1250 °C to simulate fractionation of halogens durin...

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Bibliographic Details
Published in:Lithos 2021-01, Vol.380-381, p.105859, Article 105859
Main Authors: Flemetakis, Stamatis, Klemme, Stephan, Stracke, Andreas, Genske, Felix, Berndt, Jasper, Rohrbach, Arno
Format: Article
Language:English
Subjects:
Amphibole
Fluorine
Halogens
Mantle metasomatism
Mica
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Summary:We present experimentally determined partition coefficients (Dmin/melt) for F and Cl between pargasite (amphibole), phlogopite (mica), clinopyroxene and basanitic melts. All experiments were performed at 1.4 GPa and temperatures between 1015 °C and 1250 °C to simulate fractionation of halogens during melting of metasomatized mantle. The water content of all starting materials was 16 wt% to promote crystallization of amphibole and mica. The halogen content of all starting mixtures was 0.45 wt% for F and 0.61 wt% for Cl. Our data show that F is compatible (D > 1) in pargasite and phlogopite, while Cl is strongly incompatible (D 
ISSN:0024-4937
1872-6143
DOI:10.1016/j.lithos.2020.105859