内蒙古喀喇沁地区早中生代闪长岩中麻粒岩捕虏体矿物化学及变质温压条件

韩庆军; 邵济安

Volume 25 Issue 1

Jan. 2000

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Article Navigation > Earth Science > 2000 > 25(1): 21-27

HAN Qing-jun, SHAO Ji-an, 2000. MINERAL CHEMISTRY AND METAMORPHIC p-t CONDITIONS OF GRANULITE XENOLITHS IN EARLY MESOZOIC DIORITE IN HARKIN REGION, EASTERN INNER MONGOLIA AUTONOMOUS REGION, CHINA. Earth Science, 25(1): 21-27.

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MINERAL CHEMISTRY AND METAMORPHIC p-t CONDITIONS OF GRANULITE XENOLITHS IN EARLY MESOZOIC DIORITE IN HARKIN REGION, EASTERN INNER MONGOLIA AUTONOMOUS REGION, CHINA

HAN Qing-jun¹,
SHAO Ji-an²

1.
Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
2.
Department of Geology, Peking University, Beijing 100871, China

Received Date: 1999-06-15
Publish Date: 2000-01-25

Abstract

Abstract

The mafic granulite xenolith was first reported to have occurred in Early Mesozoic diorite in Harkin region, Eastern Inner Mongolia Autonomous Region, China. The preliminary research indicates that the basic granulite xenoliths are different from the Precambrian granulite exposed on the earth surface of the North China craton. The electron microprobe analysis was performed of the four main rock-forming minerals: orthopyroxene, clinopyroxene, biotite and plagioclase, in comparison with those of Precambrian granulite terrain. The major focus is on the research into the chemical composition of various major rock-forming minerals. In addition, the metamorphic p-t conditions for the granulite xenoliths are discussed. The research results show that the metamorphism of the xenoliths had reached the granulite facies at the metamorphic temperatures ranging from 850 ℃ to 900 ℃ and at the metamorphic pressures ranging from 0.6 GPa to 1.0 GPa. These mafic granulite xenoliths reflect the component features of the Early Mesozoic continental lower crust of the research region, providing some evidence for the reconstruction of the Early Mesozoic deep crustal structure.
- granulite,
- xenolith,
- mineral chemistry,
- Early Mesozoic,
- Eastern Inner Mongolia Autonomous Region

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References(32)

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