徐—淮地区早侏罗世侵入杂岩中单斜辉石岩捕虏体的矿物组合及演化

许文良; 王清海; 刘晓春; 林景仟; 王冬艳

Volume 28 Issue 2

Mar. 2003

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Article Navigation > Earth Science > 2003 > 28(2): 173-178

XU Wen-liang, WANG Qing-hai, LIU Xiao-chun, LIN Jing-qian, WANG Dong-yan, 2003. Mineral Assemblages and Their Evolution of Clinopyroxenite Xenolith in Early Jurassic Intrusive Complex from Xu-Huai Region, Central China. Earth Science, 28(2): 173-178.

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Mineral Assemblages and Their Evolution of Clinopyroxenite Xenolith in Early Jurassic Intrusive Complex from Xu-Huai Region, Central China

1.
College of Earth Sciences, Jilin University, Changchun 130061, China
2.
Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100871, China

Received Date: 2002-05-18
Publish Date: 2003-03-25

Abstract

Abstract

Petrology and mineralogy of spinel-clinopyroxenite xenolith in Early Jurassic intrusive complex from Xu-Huai region, central China indicate that Mg-Fe spinel and Al-clinopyroxene assemblage could be present as the cumulate of the underplating magma in the lower crust or the most upper mantle, which were formed under 0.90 GPa and 835 ℃; that the mineral assemblage (Ⅱ) represented by spinel-garnet transition and clinopyroxene (Cpx) +garnet (Grt) +corundum (Co) assemblage could reflect that the spinel-clinopyroxenite was subjected to high pressure metamorphism with 1.40-1.65 GPa and 900-1 000 ℃; and that the occurrence of retrogressive amphibole implies that the spinel-clinopyroxenite could undergo the amphibolite facies retrogressive metamorphism with 0.70 GPa and 670-740 ℃. The discovery of the xenolith is of important implication for us to recognize the deep subduction direction and the scale of the Dabie-Sulu ultrahigh-pressure (UHP) metamorphic belt.
- Xu-Huai region,
- Early Jurassic intrusive complex,
- clinopyroxenite xenolith,
- mineral assemblage,
- evolution

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References(25)

References

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