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Book Chapter

Petrology of Volcanic Rocks, Gough Island, South Atlantic

By
R. W. Le Maitre
R. W. Le Maitre
Dept. Mineralogy, British Museum (Natural History), Cromwell Road, London, S.W. 7, England
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Published:
January 01, 1976

Abstract

Gough Island, one of the most southerly islands on the Slid-Atlantic Ridge, consists of rocks of the alkali basalt → trachyte association. Representative rock types, ranging from picrite-basalt, olivine basalt, trachybasalt, trachyandesite to trachyte have been analyzed for major and minor constituents. Crystallization trends have been determined lor the olivines, pyroxenes, feldspars, and iron-titanium ores using optical, chemical and X-ray methods. Strong evidence is given for differentiation by crystal fractionation.

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GSA Microform Publications

Mid-Atlantic Ridge

Peter A. Rona
Peter A. Rona
National Oceanic and Atmospheric Administration Atlantic Oceanographic and Meteorological Laboratories 15 Rickenbacker Causeway Miami, Florida 33149
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Geological Society of America
Volume
5
ISBN electronic:
9780813759050
Publication date:
January 01, 1976

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