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Two Contrasting Exhumation Scenarios of Deeply Subducted Continental Crust in North Pakistan

文献类型：期刊论文

作者Zhang, Dingding1,2; Ding, Lin1,2; Chen, Yi2,3; Schertl, Hans-Peter4,5; Qasim, Muhammad6; Jadoon, Umair Khan1,2; Wang, Houqi1; Li, Jinxiang1; Zhang, Liyun1; Yue, Yahui1
刊名GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
出版日期2022-02-01
卷号23期号:2页码:21
关键词UHP eclogite metamorphism U-Pb dating exhumation western Himalayan syntaxis
DOI10.1029/2021GC010193
英文摘要In Western Himalayan Syntaxis, the India-Asia continental collision occurred at ca. 50 Ma, while its uplift history and exhumation mechanism are still in dispute despite decades of studies. A new type of eclogite was found in Naran, located ca. 30 km southwest of the Upper Kaghan Valley. Phase equilibrium calculations and thermobarometer performed on the Naran eclogite documented the peak-P metamorphic condition of 720-780 degrees C at 2.4-2.8 GPa. Two further exhumation stages were identified with the first one at high-P granulite-facies conditions of 750-800 degrees C at 1.6-1.9 GPa, and the second at amphibolite-facies conditions of 550-630 degrees C at 0.5-0.8 GPa. SIMS U-Pb dating of metamorphic zircons yielded an age of 46 +/- 2 Ma, which is interpreted to constrain the high-P metamorphism age along the northwestern margin of the Indian plate. SIMS U-Pb dating of rutile yielded a cooling age of 26 +/- 3 Ma, which is interpreted as cooling age in the amphibolite facies. The average speculated exhumation rate of the Naran massif (similar to 3 mm a(-1)) was much lower than that recovered from the Upper Kaghan Valley massif (86-143 mm a(-1)). The tectonic and metamorphic evolution of the whole Western Himalayan Syntaxis shows the difference in temporal and spatial change within the Paleogene era, indicating the inconsistent exhumation histories of the continental slices. Such a multi-slice exhumation process was probably related to the closure of the Neo-Tethys ocean and the break-off of the Indian lithospheric slab.
WOS关键词MINERAL EQUILIBRIA CALCULATIONS ; HIGH-PRESSURE METAMORPHISM ; PARTIAL MELTING EQUILIBRIA ; FORELAND BASIN EVOLUTION ; MAIN MANTLE THRUST ; ZIRCON U-PB ; TECTONIC EVOLUTION ; KAGHAN VALLEY ; ROCK EXHUMATION ; SOUTHERN TIBET
资助项目Young Scientists Fund of the National Natural Science Foundation of China[41702060] ; Chinese Academy of Sciences, Strategic Priority Research Program[XDA20070301] ; National Natural Science Foundation of China BSCTPES project[41988101] ; Second Tibetan Plateau Scientific Expedition and Research Program[2019QZKK0708]
WOS研究方向Geochemistry & Geophysics
语种英语
出版者AMER GEOPHYSICAL UNION
WOS记录号WOS:000765651700011
资助机构Young Scientists Fund of the National Natural Science Foundation of China ; Young Scientists Fund of the National Natural Science Foundation of China ; Chinese Academy of Sciences, Strategic Priority Research Program ; Chinese Academy of Sciences, Strategic Priority Research Program ; National Natural Science Foundation of China BSCTPES project ; National Natural Science Foundation of China BSCTPES project ; Second Tibetan Plateau Scientific Expedition and Research Program ; Second Tibetan Plateau Scientific Expedition and Research Program ; Young Scientists Fund of the National Natural Science Foundation of China ; Young Scientists Fund of the National Natural Science Foundation of China ; Chinese Academy of Sciences, Strategic Priority Research Program ; Chinese Academy of Sciences, Strategic Priority Research Program ; National Natural Science Foundation of China BSCTPES project ; National Natural Science Foundation of China BSCTPES project ; Second Tibetan Plateau Scientific Expedition and Research Program ; Second Tibetan Plateau Scientific Expedition and Research Program ; Young Scientists Fund of the National Natural Science Foundation of China ; Young Scientists Fund of the National Natural Science Foundation of China ; Chinese Academy of Sciences, Strategic Priority Research Program ; Chinese Academy of Sciences, Strategic Priority Research Program ; National Natural Science Foundation of China BSCTPES project ; National Natural Science Foundation of China BSCTPES project ; Second Tibetan Plateau Scientific Expedition and Research Program ; Second Tibetan Plateau Scientific Expedition and Research Program ; Young Scientists Fund of the National Natural Science Foundation of China ; Young Scientists Fund of the National Natural Science Foundation of China ; Chinese Academy of Sciences, Strategic Priority Research Program ; Chinese Academy of Sciences, Strategic Priority Research Program ; National Natural Science Foundation of China BSCTPES project ; National Natural Science Foundation of China BSCTPES project ; Second Tibetan Plateau Scientific Expedition and Research Program ; Second Tibetan Plateau Scientific Expedition and Research Program
源URL[http://ir.iggcas.ac.cn/handle/132A11/104985]  
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Ding, Lin
作者单位1.Chinese Acad Sci, State Key Lab Tibetan Plateau Earth Syst Resource, Inst Tibetan Plateau Res, Beijing, Peoples R China
2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China
4.Ruhr Univ Bochum, Fac Geosci, Inst Geol, Bochum, Germany
5.Shandong Univ Sci & Technol, Shandong Prov Key Lab Deposit Mineralizat & Sedim, Qingdao, Peoples R China
6.Univ Islamabad, Dept Earth Sci, Abbottabad Campus, Abbottabad, Pakistan
推荐引用方式
GB/T 7714		 Zhang, Dingding,Ding, Lin,Chen, Yi,et al. Two Contrasting Exhumation Scenarios of Deeply Subducted Continental Crust in North Pakistan[J]. GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,2022,23(2):21.
APA Zhang, Dingding.,Ding, Lin.,Chen, Yi.,Schertl, Hans-Peter.,Qasim, Muhammad.,...&Xie, Jing.(2022).Two Contrasting Exhumation Scenarios of Deeply Subducted Continental Crust in North Pakistan.GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,23(2),21.
MLA Zhang, Dingding,et al."Two Contrasting Exhumation Scenarios of Deeply Subducted Continental Crust in North Pakistan".GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 23.2(2022):21.

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来源：地质与地球物理研究所

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