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Potassium pargasite from Einstödingen, Lützow-Holm Bay, East Antarctica

Published online by Cambridge University Press:  05 July 2018

S. Matsubara  and
Y. Motoyosh
S. Matsubara
Affiliation:
Department of Geology, National Science Museum, 3-23-1 Hyakunin-cho, Shinjuku, Tokyo 160, Japan
Y. Motoyosh
Affiliation:
Department of Geology, National Science Museum, 3-23-1 Hyakunin-cho, Shinjuku, Tokyo 160, Japan
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Abstract

Potassium pargasite containing 3.19 wt. % K2O was found in a skarn from the islet of Einstödingen, Lützow-Holm Bay, East Antarctica, together with some high potassium pargasitic amphiboles. A positive correlation is shown between Fe2+/(Mg+Fe2+) and K/(K + Na(A)) ratios in pargasitic amphiboles suggesting that the increase of Fe2+ serve to stabilize high-K pargasites under the metamorphic conditions of the granulite facies.

Keywords

amphibolespargasiteEinstödingenAntarctica
Type
Research Article
Information
Mineralogical Magazine , Volume 49 , Issue 354 , December 1985 , pp. 703 - 707
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1985

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