Granulite facies spinel-cordierite assemblages from the Kerala Khondalite Belt, Southern India

被引：13
|
作者：
Bindu, RS [1 ]
机构：
[1] Osaka City Univ, Fac Sci, Dept Geosci, Osaka 558, Japan
来源：
GONDWANA RESEARCH | 1997年 / 1卷 / 01期
关键词：
petrology; P-T conditions; mineral reactions; metapelite; Southern India;
D O I：
10.1016/S1342-937X(05)70010-1
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
Granulite facies metapelites at Koliacode in the Kerala Khondalite Belt show compositional bands of cordierite, spinel, sillimanite and biotite alternating with quartz-feldspar rich bands. Reaction textures involving cordierite and garnet show evidence for decompression. Mineral phase equilibria computations provide temperatures of ca. 700-750 degrees C and pressures of 4.5-5.0 kbar. Spinel in these rocks is remarkably enriched in Zn (ZnO up to 9.4 wt. %). The metamorphic P-T conditions and mineral reactions indicate that the terrain underwent rapid and near isothermal decompression.
引用
收藏
页码：121 / 128
页数：8
相关论文
共 50 条
12345