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Dufrenite in iron-formation on the Kangnas farm, Aggeneys district, Bushmanland, South Africa

Published online by Cambridge University Press:  05 July 2018

W. A. Van Der Westhuizen ,
H. de Bruiyn ,
G. J. Beukes  and
D. Strydom
W. A. Van Der Westhuizen
Affiliation:
Department of Geology, University of the Orange Free State, P.O. Box 339, Bloemfontein, 9300, Republic of South Africa
H. de Bruiyn
Affiliation:
Department of Geology, University of the Orange Free State, P.O. Box 339, Bloemfontein, 9300, Republic of South Africa
G. J. Beukes
Affiliation:
Department of Geology, University of the Orange Free State, P.O. Box 339, Bloemfontein, 9300, Republic of South Africa
D. Strydom
Affiliation:
Department of Geology, University of Natal, Pietermaritzburg, Republic of South Africa
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Abstract

An occurrence of yellowish green to green dufrenite in iron-formation from Proterozoic metamorphites on Kangnas farm near Aggeneys, Bushmanland, South Africa is described. The mineral formed by reaction between iron oxides and hydroxides and a phosphate, probably apatite. It was identified by its characteristic X-ray diffraction pattern, but microprobe analyses presented here indicate that the chemical compositions are extremely variable.

Keywords

dufreniteEMP analysesProterozoic metamorphitesiron-formation
Type
Non-silicate Mineralogy
Information
Mineralogical Magazine , Volume 54 , Issue 376 , September 1990 , pp. 419 - 424
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1990

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