0.1 GPa块状榴辉岩脱水部分熔融: 局部熔融体系和温度的影响

姜杨; 周汉文; 杨启军; 徐学纯; 马瑞

Volume 31 Issue 1

Jan. 2006

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Article Navigation > Earth Science > 2006 > 31(1): 121-128

JIANG Yang, ZHOU Han-wen, YANG Qi-jun, XU Xue-chun, MA Rui, 2006. Dehydration Partial Melting Experiment on Solid Eclogite at 0.1 GPa: The Influence of Localized Melting System and Temperature. Earth Science, 31(1): 121-128.

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Dehydration Partial Melting Experiment on Solid Eclogite at 0.1 GPa: The Influence of Localized Melting System and Temperature

JIANG Yang^{1, 2
,},
ZHOU Han-wen^{1, 2},
YANG Qi-jun¹,
XU Xue-chun³,
MA Rui³

1.
Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, China
2.
State Key Laboratory of Grealogical Processes and Mineral Resources, China Urirersiry of Geosciences, Wuhan 430074, Chima
3.
College of Eurih Sriences, Jilin University, Changchun 130061, China

Received Date: 2005-08-12
Publish Date: 2006-01-25

Abstract

Abstract

This study presents the open and dehydration melting experiments on solid retrograde eclogite from Dongchonghe in Yingshan, Hubei Province. The sample contains hydraous hornblende and biotite. The experiments are at 0. 1 GPa and 750, 800, 850 and 900℃. The duration time for heating is 4 h. The initial melting commences from dehydration melting of hydrous minerals, and melts appear at 850℃. Melts are mainly in the three localized melting systems: they are the grain boundaries of symplectite, one side of sample on which is higher melting degree, and the grain boundaries and cracks of quartz. Because of different compositions of minerals in different localized melting systems, chemical compositions of melts range from basic to acid at the same temperature. And it runs to acid at the same localized melting system as increase of temperature. This study implies, at the same pressure, temperature and different compositions of minerals in different localized melting systems are the two main factors that influence compositions of melts. And it provides experimental evidences to understand dehydration melting behavior of eclogite and to contrast with other basic metamorphic rocks.
- localized melting system,
- temperature,
- dehydration partial melting,
- solid sample,
- retrograde eclogite,
- Dong-chonghe in Yingshan.

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References(33)

References

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