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Awaruite, iridian awaruite, and a new Ru-Os-Ir-Ni-Fe alloy from the Sakhakot-Qila complex, Malakand Agency, Pakistan

Published online by Cambridge University Press:  05 July 2018

Zulfiqar Ahmed  and
J. C. Bevan
Zulfiqar Ahmed
Affiliation:
Department of Geology, King's College, Strand, London, WC2R 2LS
J. C. Bevan
Affiliation:
Department of Mineralogy, British Museum (Natural History), Cromwell Road, London, SW7 5BD
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Abstract

The authors report the first occurrence of awaruite in Pakistan, in the Sakhakot-Qila ultramafites. Electron-microprobe analysis reveals a considerable variation in the compositions of awaruites from different parts of the complex. The presence of copper in awaruite, in amounts up to 5 atomic percent, is also reported for the first time. In one chromitite body, an iridian awaruite with up to 27 wt% of iridium occurs in association with ‘normal’ awaruite and a new Ru-Os-Ir-Ni-Fe alloy. The awaruites are discussed in relation to those from other localities.

Type
Research Article
Information
Mineralogical Magazine , Volume 44 , Issue 334 , June 1981 , pp. 225 - 230
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1981

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