Paleozoic subduction of the southern Dunhuang Orogenic Belt, northwest China: metamorphism and geochronology of the Shuixiakou area

doi:10.1080/09853111.2018.1427407

	Paleozoic subduction of the southern Dunhuang Orogenic Belt, northwest China: metamorphism and geochronology of the Shuixiakou area
	Wang, Hao Y. C.1,2; Zhang, Qian W. L.1; Chen, Hong-Xu 1; Liu, Jia-Hui 1; Zhang, Hui C. G.1; Van Tho Pham 1; Peng, Tao 1; Wu, Chun-Ming 1,2
刊名	GEODINAMICA ACTA
	2018-01-19
卷号	30 期号:1 页码:63-83
关键词	Dunhuang Orogenic Belt tectonic melange Geothermobarometry U-Pb dating P-T-t path
ISSN号	0985-3111
DOI	10.1080/09853111.2018.1427407
文献子类	Article
英文摘要	Amphibolites in the Shuixiakou area of the southern Dunhuang Orogenic Belt, southernmost Central Asian Orogenic Belt (CAOB), occur as lenses within hornblende-biotite-plagioclase gneiss or pelitic schist, exhibiting block-in-matrix feature of tectonic melange. Three generations of metamorphic mineral assemblages (M1, M2, and M3) have been recognized in the garnet-bearing amphibolite lenses. The metamorphic prograde assemblage (M1) is documented with inclusion trails (hornblende+plagioclase+quartz) within garnet porphyroblasts, and are estimated to be formed under 610-690 degrees C and 6.5-10.2 kbar. The metamorphic peak assemblage (M2) consists of garnet+hornblende+clinopyroxene+plagioclase+quartz in the matrix and records metamorphic peak P-T conditions of 720-750 degrees C and 13.4-14.7 kbar. The retrograde assemblage (M3) is represented by the symplectic assemblage (hornblende+plagioclase+quartz +/- biotite +/- magnetite) rimming the garnet porphyroblast, formed in the decompression stage under P-T conditions of 630-730 degrees C and 3.8-7.2 kbar. The derived metamorphic P-T paths show similar tight clockwise loops including nearly isothermal decompression processes, typical of orogenic metamorphism. SIMS dating of metamorphic zircons from the amphibolites confirm that the high-pressure metamorphism (M2) occurred at ca. 438-398Ma.
WOS关键词	GRANULITE-FACIES METAMORPHISM ; HIGH-PRESSURE GRANULITES ; TEMPERATURE TIME PATHS ; EASTERN TARIM CRATON ; U-PB GEOCHRONOLOGY ; NW CHINA ; TECTONIC IMPLICATIONS ; ACCRETIONARY OROGENESIS ; REGIONAL METAMORPHISM ; ZIRCON GEOCHRONOLOGY
WOS研究方向	Geology
语种	英语
出版者	TAYLOR & FRANCIS LTD
WOS记录号	WOS:000427853200001
资助机构	National Natural Science Foundation of China(41730215) ; National Natural Science Foundation of China(41730215) ; National Natural Science Foundation of China(41730215) ; National Natural Science Foundation of China(41730215) ; Chinese Academy of Sciences(QYZDJ-SSW-DQC036) ; Chinese Academy of Sciences(QYZDJ-SSW-DQC036) ; Chinese Academy of Sciences(QYZDJ-SSW-DQC036) ; Chinese Academy of Sciences(QYZDJ-SSW-DQC036) ; National Postdoctoral Program for Innovative Talents(BX201700240) ; National Postdoctoral Program for Innovative Talents(BX201700240) ; National Postdoctoral Program for Innovative Talents(BX201700240) ; National Postdoctoral Program for Innovative Talents(BX201700240) ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(Kai201605) ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(Kai201605) ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(Kai201605) ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(Kai201605) ; National Natural Science Foundation of China(41730215) ; National Natural Science Foundation of China(41730215) ; National Natural Science Foundation of China(41730215) ; National Natural Science Foundation of China(41730215) ; Chinese Academy of Sciences(QYZDJ-SSW-DQC036) ; Chinese Academy of Sciences(QYZDJ-SSW-DQC036) ; Chinese Academy of Sciences(QYZDJ-SSW-DQC036) ; Chinese Academy of Sciences(QYZDJ-SSW-DQC036) ; National Postdoctoral Program for Innovative Talents(BX201700240) ; National Postdoctoral Program for Innovative Talents(BX201700240) ; National Postdoctoral Program for Innovative Talents(BX201700240) ; National Postdoctoral Program for Innovative Talents(BX201700240) ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(Kai201605) ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(Kai201605) ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(Kai201605) ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(Kai201605) ; National Natural Science Foundation of China(41730215) ; National Natural Science Foundation of China(41730215) ; National Natural Science Foundation of China(41730215) ; National Natural Science Foundation of China(41730215) ; Chinese Academy of Sciences(QYZDJ-SSW-DQC036) ; Chinese Academy of Sciences(QYZDJ-SSW-DQC036) ; Chinese Academy of Sciences(QYZDJ-SSW-DQC036) ; Chinese Academy of Sciences(QYZDJ-SSW-DQC036) ; National Postdoctoral Program for Innovative Talents(BX201700240) ; National Postdoctoral Program for Innovative Talents(BX201700240) ; National Postdoctoral Program for Innovative Talents(BX201700240) ; National Postdoctoral Program for Innovative Talents(BX201700240) ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(Kai201605) ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(Kai201605) ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(Kai201605) ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(Kai201605) ; National Natural Science Foundation of China(41730215) ; National Natural Science Foundation of China(41730215) ; National Natural Science Foundation of China(41730215) ; National Natural Science Foundation of China(41730215) ; Chinese Academy of Sciences(QYZDJ-SSW-DQC036) ; Chinese Academy of Sciences(QYZDJ-SSW-DQC036) ; Chinese Academy of Sciences(QYZDJ-SSW-DQC036) ; Chinese Academy of Sciences(QYZDJ-SSW-DQC036) ; National Postdoctoral Program for Innovative Talents(BX201700240) ; National Postdoctoral Program for Innovative Talents(BX201700240) ; National Postdoctoral Program for Innovative Talents(BX201700240) ; National Postdoctoral Program for Innovative Talents(BX201700240) ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(Kai201605) ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(Kai201605) ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(Kai201605) ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences(Kai201605)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/83036]
专题	中国科学院地质与地球物理研究所
通讯作者	Wu, Chun-Ming
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Coll Earth Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Wang, Hao Y. C.,Zhang, Qian W. L.,Chen, Hong-Xu,et al. Paleozoic subduction of the southern Dunhuang Orogenic Belt, northwest China: metamorphism and geochronology of the Shuixiakou area[J]. GEODINAMICA ACTA,2018,30(1):63-83.
APA	Wang, Hao Y. C..,Zhang, Qian W. L..,Chen, Hong-Xu.,Liu, Jia-Hui.,Zhang, Hui C. G..,...&Wu, Chun-Ming.(2018).Paleozoic subduction of the southern Dunhuang Orogenic Belt, northwest China: metamorphism and geochronology of the Shuixiakou area.GEODINAMICA ACTA,30(1),63-83.
MLA	Wang, Hao Y. C.,et al."Paleozoic subduction of the southern Dunhuang Orogenic Belt, northwest China: metamorphism and geochronology of the Shuixiakou area".GEODINAMICA ACTA 30.1(2018):63-83.