Discovery and thermodynamic characteristics of high-grade metamorphic rock series along the south of Yantan fault in Beishan, Xinjiang and its tectonic significance

ISL OpenIR > 青海盐湖研究所知识仓储

	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 XingKe 3; Ma HaiZhou1
	2016-06-01
发表期刊	ACTA PETROLOGICA SINICA
卷号	32 期号:6 页码:1688-1698
关键词	High-grade Metamorphic Rock Series Middle And Low-pressure Mafic Granulites Geneticmineralogy P-t Condition Beishan Xinjiang
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.
语种	英语
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
推荐引用方式 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.