Assimilation of Crustal Material by Basaltic Magma: Strontium Isotopic and Trace Element Data from the Edgecumbe Volcanic Field, SE Alaska
- 1 February 1984
- journal article
- Published by Oxford University Press (OUP) in Journal of Petrology
- Vol. 25 (1) , 1-26
- https://doi.org/10.1093/petrology/25.1.1
Abstract
Textures in the blueschist metabasic rocks of the island of Syros, Greece, indicate a reaction forming omphacite and garnet from earlier glaucophane and epidote. A balanced ‘whole rock’ reaction can be written using the phase compositions and modal mineralogy of the products observed. This reaction is continuous in P-T space if Mg and Fe2+ are independent components. The available thermodynamic data suggest that the ‘eclogite’ (garnet plus omphacite) assemblage is favoured by higher temperatures.Keywords
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