A Sapphirine-Cordierite-Bronzite-Phlogopite Paragenesis from Namaqualand, South Africa

T. N. Clifford1, E. F. Stumpfl2 and J. R. McIver1
1 Department of Geology, University of the Witwatersrand, Johannesburg, South Africa
2 Montanistische Hochschule, Leoben, Austria (formerly Mineralogisch-Petrographisches Institut, Universität Hamburg, Germany)

Summary: The rock composition and electron microprobe analyses of the five constituent minerals are presented for a sapphirine-cordierite-bronzite-phlogopite-spinel rock from Namaqualand, South Africa. These data are considered in relation to experimental data and the mineralogy of certain associated rock types, and it is suggested that the sapphirine-bearing rock represents a metamorphic residuum (restite) after extraction of anatectic granitic liquid from an original argillaceous sediment.

Mineralogical Magazine; December 1975 v. 40; no. 312; p. 347-356; DOI: 10.1180/minmag.1975.040.312.03
© 1975, The Mineralogical Society
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