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Discovery and thermodynamic characteristics of high-grade metamorphic rock series along the south of Yantan fault in Beishan, Xinjiang and its tectonic significance
Li YongShou1,2; Yang XingKe3; Ma HaiZhou1
2016-06-01
发表期刊ACTA PETROLOGICA SINICA
卷号32期号:6页码:1688-1698
文章类型Article
摘要The high-grade metamorphic rock series, representing metamorphic product in the middle-lower crust, was first found in south of Yantan fault of Beishan, Xinjiang. It is consisted of plagioclase-gneiss, migmatites, amphibolites and a small quantity of granulites. Through detailed field survey, petrography mineral-chemical study, find that the basic granulite is consisted of diopsides, hypersthenes, brown homblendes and labradmites. It has an evolution from the granulite facies rocks into amphibolite facies rocks by retrograde metamorphic reactions. Research shows that, the clinopyroxenes and homblendes of those granulites in this area have metamorphic genetic, the clinopyroxene is formed in high pressure environment and the hornblendes formed in the middle and low-pressure environment. Based on mineral geothermobaromemter, the metamorphism P-T conditions of the granulite facies is 1. 25GPa (42km depth), the temperature is about 841 degrees C, and the range of retrograde metamorphism temperature of amphibolite facies should be 650 similar to 657 degrees C, the pressure is 0.460 similar to 0. 495GPa ( middle and low-pressure, 16. 5km depth). The discovery of the granulite-facies stratum in this area has an important significance on further study of formation and structure of deeper crust in the area and continental geodynamic mechanism in Xinjiang, China.
关键词High-grade Metamorphic Rock Series Middle And Low-pressure Mafic Granulites Geneticmineralogy P-t Condition Beishan Xinjiang
WOS标题词Science & Technology ; Physical Sciences
关键词[WOS]HIGH-PRESSURE GRANULITES ; GEOLOGICAL SIGNIFICANCE ; MOLDANUBIAN ZONE ; MAFIC GRANULITES ; EAST ANTARCTICA ; BOHEMIAN MASSIF ; GROVE MOUNTAINS ; OROGENIC BELT ; T PATH ; CHINA
收录类别SCI
语种英语
WOS研究方向Geology
WOS类目Geology
WOS记录号WOS:000379796600009
引用统计
文献类型期刊论文
条目标识符http://ir.isl.ac.cn/handle/363002/6339
专题青海盐湖研究所知识仓储
盐湖地质与环境实验室
作者单位1.Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Salt Lake Resources & Chem, Xining 810008, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Changan Univ, MOE Key Lab Western Chinas Mineral Resources & Ge, Earth Sci & Resources Coll, Xian 710054, Peoples R China
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GB/T 7714
Li YongShou,Yang XingKe,Ma HaiZhou. Discovery and thermodynamic characteristics of high-grade metamorphic rock series along the south of Yantan fault in Beishan, Xinjiang and its tectonic significance[J]. ACTA PETROLOGICA SINICA,2016,32(6):1688-1698.
APA Li YongShou,Yang XingKe,&Ma HaiZhou.(2016).Discovery and thermodynamic characteristics of high-grade metamorphic rock series along the south of Yantan fault in Beishan, Xinjiang and its tectonic significance.ACTA PETROLOGICA SINICA,32(6),1688-1698.
MLA Li YongShou,et al."Discovery and thermodynamic characteristics of high-grade metamorphic rock series along the south of Yantan fault in Beishan, Xinjiang and its tectonic significance".ACTA PETROLOGICA SINICA 32.6(2016):1688-1698.
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