Petrology of acid xenoliths from Surtsey
- 1 October 1968
- journal article
- Published by Cambridge University Press (CUP) in Geological Magazine
- Vol. 105 (5) , 440-453
- https://doi.org/10.1017/s0016756800054820
Abstract
SUMMARY: A number of acid plutonic xenoliths from the volcano Surtsey are described, along with fine-grained rock fragments, consisting chiefly of anorthitic plagioclase and tridymite. The chemistry of the xenoliths indicates a compositional pattern from tonalitic to pyrometamorphic types. A hypothesis is put forward that the tonalitic xenoliths have undergone partial fusion during transport to the surface in the basaltic magma, and the removal of a salic liquid from granitic xenolith into the magma has resulted in the formation of a residue of anorthitic plagioclase and tridymite. Granitic xenoliths from other parts of Iceland, and their fusion products, are also described.Keywords
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