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Composition of chromites in cordierite-and mica-bearing Cr-Ni ores from Málaga Province, Spain

Published online by Cambridge University Press:  05 July 2018

I. S. Oen ,
C. Kieft  and
A. B. Westerhof
I. S. Oen
Affiliation:
Geologisch Instituut der Universiteit van Amsterdam
C. Kieft
Affiliation:
Netherlands Organisation for the Advancement of Pure Research (ZWO)
A. B. Westerhof
Affiliation:
Geologisch Instituut der Universiteit van Amsterdam
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Summary

An unusual paragenesis of chromite, nickeline, cordierite, and red-brown mica occurs in veins, pods, and schlieren in serpentinized ultramafic rocks at La Gallega and Los Jarales in Máilaga province, Spain. The chromites in this paragenesis are low-ferric, ferrous-rich aluminous chromites with exceptionally high vanadium content ranging between 1·8 and 2·9 wt % V2O3 and high zinc content ranging between 0·5 and 1·0 wt % ZnO. A comparison of chromite composition with available experimental data, together with paragenetical and textural evidence, suggests that the chromite, cordierite, and red-brown mica crystallized at magmatic temperatures between approximately 1300° and 1000°C at low oxygen fugacities and maximum pressures below 10 kb, probably near 5 kb.

Type
Research Article
Information
Mineralogical Magazine , Volume 39 , Issue 302 , June 1973 , pp. 193 - 203
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1973

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