Some Chemical Data on Members of the Shoshonite Association

Germaine A. Joplin, E. Kiss, N. G. Ware and Jennifer R. Widdowson

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.

Mineralogical Magazine; December 1972 v. 38; no. 300; p. 936-945; DOI: 10.1180/minmag.1972.038.300.04
© 1972, The Mineralogical Society
Mineralogical Society (www.minersoc.org)