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Petrology of Volcanic Rocks, Gough Island, South Atlantic

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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January 01, 1976


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
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Publication date:
January 01, 1976




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