Metamorphic evolution and geochronology of the tectonic melange of the Dongbatu and Mogutai blocks, middle Dunhuang orogenic belt, northwestern China

doi:10.1130/GES01514.1

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 岩石圈演化国家重点实验室

	Metamorphic evolution and geochronology of the tectonic melange of the Dongbatu and Mogutai blocks, middle Dunhuang orogenic belt, northwestern China
	Wang, Hao Y. C.1,2; Zhang, Qian W. L.2; Lu, Jun-Sheng 2,3; Chen, Hong-Xu 2; Liu, Jia-Hui 2; Zhang, Hui C. G.2; Van Tho Pham 2; Peng, Tao 2; Wu, Chun-Ming 2
刊名	GEOSPHERE
	2018-04-01
卷号	14 期号:2 页码:883-906
ISSN号	1553-040X
DOI	10.1130/GES01514.1
文献子类	Article
英文摘要	Mafic granulite and amphibolite in the Dongbatu and Mogutai blocks, middle Dunhuang orogenic belt, northwest China, southernmost Central Asian orogenic belt, occur as lenses within the matrix of metapelite and marble, exhibiting typical block-in-matrix fabrics of tectonic melange. Three stages of metamorphic mineral assemblages were identified in these lenses. Clockwise metamorphic pressure-temperature (P-T) paths were obtained through geothermobarometry and thermodynamic pseudosection modeling, passing from 656 degrees C and 10.9 kbar through 830 degrees C and 16.5 kbar to 657 degrees C and 4.9 kbar for the mafic granulite, and from 564-645 degrees C and 3.2-9.6 kbar through 634727 degrees C and 6.1-14.2 kbar to 615-664 degrees C and 3.2-4.2 kbar for the amphibolites, respectively. Metamorphic peak P-T conditions in the metapelitic country rocks were estimated to be 635-675 degrees C and 6.0-6.9 kbar. The metamorphic peak of the mafic granulite approaches the high P-T facies series, indicative of a subduction zone. Secondary-ion mass spectrometry and laser ablationinductively coupled plasma-mass spectrometry U-Pb dating of metamorphic zircons suggests that the metamorphic event occurred between ca. 420 and 372 Ma. These data further certify that the subduction of the continental margin and subsequent uplift of the Dunhuang orogenic belt represent a long-lived tectono-metamorphic event in the Paleozoic.
WOS关键词	ZIRCON U-PB ; GARNET-BIOTITE GEOTHERMOMETER ; CONSISTENT THERMODYNAMIC DATA ; HIGH-PRESSURE GRANULITES ; TEMPERATURE TIME PATHS ; EASTERN TARIM CRATON ; NW CHINA ; ACCRETIONARY OROGENESIS ; EMPIRICAL CALIBRATION ; REGIONAL METAMORPHISM
WOS研究方向	Geology
语种	英语
出版者	GEOLOGICAL SOC AMER, INC
WOS记录号	WOS:000433391400025
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/132A11/88250]
专题	地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者	Wu, Chun-Ming
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Coll Earth Sci, POB 4588, Beijing 100049, Peoples R China 3.Northwest Univ, Dept Geol, State Key Lab Continental Dynam, 229 North Taibai St, Xian 710069, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Wang, Hao Y. C.,Zhang, Qian W. L.,Lu, Jun-Sheng,et al. Metamorphic evolution and geochronology of the tectonic melange of the Dongbatu and Mogutai blocks, middle Dunhuang orogenic belt, northwestern China[J]. GEOSPHERE,2018,14(2):883-906.
APA	Wang, Hao Y. C..,Zhang, Qian W. L..,Lu, Jun-Sheng.,Chen, Hong-Xu.,Liu, Jia-Hui.,...&Wu, Chun-Ming.(2018).Metamorphic evolution and geochronology of the tectonic melange of the Dongbatu and Mogutai blocks, middle Dunhuang orogenic belt, northwestern China.GEOSPHERE,14(2),883-906.
MLA	Wang, Hao Y. C.,et al."Metamorphic evolution and geochronology of the tectonic melange of the Dongbatu and Mogutai blocks, middle Dunhuang orogenic belt, northwestern China".GEOSPHERE 14.2(2018):883-906.