MIXING PROPERTIES AND STABILITY OF JADEITE-ACMITE PYROXENE IN THE PRESENCE OF ALBITE AND QUARTZ

被引：31

作者：

LIU, J ^{[1
]}

BOHLEN, SR ^{[1
]}

机构：

[1] US GEOL SURVEY,MS 910,MENLO PK,CA 94025

来源：

CONTRIBUTIONS TO MINERALOGY AND PETROLOGY | 1995年 / 119卷 / 04期

关键词：

D O I：

10.1007/s004100050053

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

The stability of synthetic jadeite-acmite pyroxene coexisting with albite and quartz has been determined at 600, 700, and 900 degrees C. The end-member reaction: albite = jadeite + quartz has been determined to lie between 1.67 and 1.70 GPa at 600 degrees C, 1.88 and 1.90 GPa at 700 degrees C, and 2.44 and 2.48 GPa at 900 degrees C. Jd(78)Acm(22) + quartz is stable above 1.58, 1.78, and 2.33 GPa at 600, 700, and 900 degrees C, respectively. Jd(61)Acm(39) + quartz is stable above 1.47, 1.67, and 2.18 GPa at 600, 700, and 900 degrees C, respectively. Addition of as much as 40% of acmite component in jadeite extends pyroxene stability by less than 300 MPa at 900 degrees C. Unit-cell parameters measured for synthetic jadeite-acmite pyroxenes indicate linear volume-composition relations. The data are consistent with ideal mixing in jadeite-acmite solutions.

引用

页码：433 / 440

页数：8

共 26 条

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