Journal of Earth System Science

, Volume 110, Issue 4, pp 287–291 | Cite as

Partial melting of metavolcanics in amphibolite facies regional metamorphism

  • Alan Bruce Thompson


Metavolcanic rocks containing low-Ca amphiboles (gedrite, cummingtonite) and biotite can undergo substantial dehydration-melting. This is likely to be most prominent in Barrovian Facies Series (kyanite-sillimanite) and occurs at the same time as widespread metapelite dehydrationmelting. In lower pressure facies series, metavolcanics will be represented by granulites rich in orthopyroxene when dehydration occurs at much lower temperatures than melting. In higher pressure facies series it is not well known whether metavolcanic rocks dehydrate or melt at temperatures lower or similar to that of metapelites.

Key words

Metavolcanics gedrite cummingtonite biotite dehydration-melting granulites orthopyroxene experimental studies amphibolite Metapelite 


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Copyright information

© Printed in India 2001

Authors and Affiliations

  • Alan Bruce Thompson
    • 1
  1. 1.Department of Earth SciencesETH ZürichSwitzerland

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