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Wollastonite from hydrothermally altered basaltic rocks in Iceland

Published online by Cambridge University Press:  05 July 2018

H. Kristmannsdóttir
H. Kristmannsdóttir*
Affiliation:
National Energy Authority, Hydrothermal Div., Grensásvegur 9, Reykjavik, Iceland
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Abstract

Wollastonite is reported, for the first time in Iceland, in hydrothermally altered basaltic rocks in the Krafla high-temperature geothermal area, northern Iceland. Two possible modes of origin are suggested: (1) A contact metamorphic origin at the expense of hydrothermal quartz and calcite near the margins of dykes. (2) A hydrothermal origin at depths below 1000 m where fluid temperatures exceed 300°C.

Type
Research Article
Information
Mineralogical Magazine , Volume 44 , Issue 333 , March 1981 , pp. 95 - 99
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1981

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