COMPOSITION OF CHROMITE AND COEXISTING PT-FE ALLOY AT MAGMATIC TEMPERATURES

被引：14
|
作者：
ROEDER, PL
JAMIESON, HE
机构：
[1] Geological Sciences, Queen’s University, Kingston, ON
来源：
AUSTRALIAN JOURNAL OF EARTH SCIENCES | 1992年 / 39卷 / 03期
关键词：
ALLOY; BASALT; CHROMITE; EXPERIMENTS; OXYGEN FUGACITY; PT-FE;
D O I：
10.1080/08120099208728034
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
The composition of Pt - Fe alloy in equilibrium with chromite and basaltic mett has been determined in experiments under controlled oxygen fugacities at temperatures of 1200-1400-degrees-C. The composition of the alloy found in the experiments is on average 0.02 higher in Fe/(Fe+Pt) than the alloy composition calculated from the composition of chromite and the f(o2) of the experiments using published thermodynamic data and solid solution models of alloy and chromite. The composition of Pt Fe alloy in equilibrium with the composition of chromite found associated with alloy in layered intrusions was calculated assuming a temperature of 1200-degrees-C and a log f(o2) of -8.41 (FMQ). The calculated composition of alloy under these conditions was found to be Fe/(Fe+Pt) = 0.20-0.25.
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页码：419 / 426
页数：8
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