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Some chemical data on members of the shoshonite association

Published online by Cambridge University Press:  05 July 2018

Germaine A. Joplin
Affiliation:
Department of Geophysics and Geochemistry, Australian National University, Canberra, A.C.T., Australia
E. Kiss
Affiliation:
Department of Geophysics and Geochemistry, Australian National University, Canberra, A.C.T., Australia
N. G. Ware
Affiliation:
Department of Geophysics and Geochemistry, Australian National University, Canberra, A.C.T., Australia
Jennifer R. Widdowson
Affiliation:
Department of Geophysics and Geochemistry, Australian National University, Canberra, A.C.T., Australia

Summary

A number of minerals and residual glasses from absarokites, shoshonites, and latites have been analysed by electron probe.

Clinopyroxenes show very little iron-enrichment and these rocks are thus distinguished from tholeiites and alkali basalts.

Glasses from this group are also distinct from tholeiites and alkali basalts and occupy a separate field on a CaO-Na2O-K2O diagram.

Type
Research Article
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1972

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