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Lower Tertiary Tholeiitic Basalts from Southern New Caledonia

Published online by Cambridge University Press:  05 July 2018

K. A. Rodgers
K. A. Rodgers*
Affiliation:
Department of Geology, University of Auckland, Auckland I, New Zealand
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Summary

Eocene tholeiitic basalts occur throughout the length of New Caledonia where their emplacement preceded that of the peridotite massifs. In the south, two areas of basaltic rocks are intimately associated with Eocene sediments, which have been overridden by the peridotites. The aphyric, holocrystalline basalts consist of plagioclase, clinopyroxene, titanomagnetite, and minor quartz together with their abundant alteration products, which include epidote and uralite. The chemical compositions of these rocks fail to show agreement with oceanic tholeiitites, as suggested by earlier writers, although strong similarities exist with the basalts of the Papuan Ultramafic Belt.

Type
Research Article
Information
Mineralogical Magazine , Volume 40 , Issue 309 , March 1975 , pp. 25 - 32
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1975

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