适用于尖晶石相橄榄岩的第一个定量地质压力计

doi:10.11867/j.issn.1001-8166.1994.06.0088

地球科学进展 ›› 1994, Vol. 9 ›› Issue (6): 88 -91. doi: 10.11867/j.issn.1001-8166.1994.06.0088

支霞臣,陈道公

中国科学技术大学合肥 230026

收稿日期:1993-08-19 修回日期:1993-12-03 出版日期:1994-11-01
通讯作者: 支霞臣
基金资助:
国家自然科学基金项目“皖苏地区岩石圈的热状态和化学结构”（编号：49173167）资助.

THE FIRST GEOBAROMETER FOR SPINEL LHERZOLITE

Zhi Xiachen,Chen Daogong

University of Science and Technology of China, Hefei 230026

Received:1993-08-19 Revised:1993-12-03 Online:1994-11-01 Published:1994-11-01

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正确测定尖晶石相橄榄岩的T-P关系，对于了解岩石圈地幔的许多基本性质和过程具有重要意义。介绍了根据Ca在共存的橄榄石和辉石之间的分配而建立的适用于尖晶石相橄榄岩的第一个定量地质压力计，叙述了该地质压力计的研究历史、现状和使用中的注意事项。

关键词: Ga的分配, 地质压力计, 尖晶石相橄榄岩

The historic development of the first geobarometer for spinel lherzolite based on the distribution of calcium between existing olivine and clinopyroxene is reported here.
Kohler and Brey(1990) suggested the geobarometer as follows:
P(10⁸Pa)=(−TlnD_Ca−11982+361T)/56.2 for T≥ (1275.25+2.827P) (K),
P(10⁸Pa)=( −TlnD_Ca−5792−1.25T)/42.5 for T≤(1275.25+2.827P) (K).
Based on their calibrated experiments for calcium exchange between olivine and clinopyroxene from wide temperature-pressure range.

Key words: Ca distribution, Geobarometer, Spinel lherzolite.

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