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Late Eocene magmatism of the eastern Qiangtang block (eastern Tibetan Plateau) and its geodynamic implications

文献类型：期刊论文

作者Zhang, Bin1,2,3,4; Liu, Jiaqi1,3,4; Chen, Wen2; Zhu, Zeyang1,3,4; Sun, Chunqing1,3,4
刊名JOURNAL OF ASIAN EARTH SCIENCES
出版日期2020-06-15
卷号195页码:16
关键词Tibetan Plateau The eastern Qiangtang block Eocene magmatism Magmatic recharge Uplift
ISSN号1367-9120
DOI10.1016/j.jseaes.2020.104329
英文摘要Post-collisional magmatism offers significant clues to reveal the deep dynamic process and surface uplift of plateaus. New zircon U-Pb ages, biotite Ar-Ar ages, zircon trace elements, and whole-rock geochemistry, integrated with published data of igneous rocks from the eastern Qiangtang block (eastern Tibetan Plateau) were determined to unravel the geodynamics and constrain the uplift history. These igneous rocks consist of few mafic and many intermediate-felsic series. Geochronological studies reveal that the magmatism mainly occurred in similar to 43-33 Ma. The late Eocene igneous rocks are characterized by high potassium, enrichment in large ion lithophile elements (LILE, e.g., Rb, Ba, Th, U), depleted in high field strength elements (HFSE, e.g., Nb, Ta, Ti), negligible Eu anomalies, with a wide range of highly incompatible element ratios. The parental magmas of these rocks were most probably generated by different degrees of partial melting of the lithospheric mantle, which were heterogeneously metasomatized by subduction related multiphase fluids/melts. Whole-rock geochemistry, zircon trace elements, and thermodynamic modeling results suggest that the parental magmas experienced complicated and different differentiation processes. Mantle metasomatism, fractional crystallization, and magmatic recharge made contributions to the enrichment of incompatible elements and the wide range ratios between highly incompatible elements. In combination with the estimated Eocene crustal thickness, we suggest that the southward continental subduction of the Songpan-Ganzi block triggered the magmatism, thickened the crust, and induced the surface uplift to no more than similar to 3 km in the late Eocene.
WOS关键词PORPHYRY COPPER-DEPOSIT ; CU-MO DEPOSIT ; TRACE-ELEMENT COMPOSITION ; U-PB ; LITHOSPHERIC MANTLE ; TECTONIC EVOLUTION ; CONTINENTAL-CRUST ; ULTRAPOTASSIC MAGMATISM ; CENOZOIC VOLCANISM ; THERMAL HISTORY
资助项目National Natural Science Foundation of China[41772357] ; China Scholarship Council[201804910410]
WOS研究方向Geology
语种英语
WOS记录号WOS:000536141200003
出版者PERGAMON-ELSEVIER SCIENCE LTD
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council
源URL[http://ir.iggcas.ac.cn/handle/132A11/96683]  
专题地质与地球物理研究所_中国科学院新生代地质与环境重点实验室
通讯作者Liu, Jiaqi; Chen, Wen
作者单位1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
2.Chinese Acad Geol Sci, Inst Geol, Lab Isotope Thermochronol, Key Lab Deep Dynam, Beijing 100037, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China
4.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Bin,Liu, Jiaqi,Chen, Wen,et al. Late Eocene magmatism of the eastern Qiangtang block (eastern Tibetan Plateau) and its geodynamic implications[J]. JOURNAL OF ASIAN EARTH SCIENCES,2020,195:16.
APA Zhang, Bin,Liu, Jiaqi,Chen, Wen,Zhu, Zeyang,&Sun, Chunqing.(2020).Late Eocene magmatism of the eastern Qiangtang block (eastern Tibetan Plateau) and its geodynamic implications.JOURNAL OF ASIAN EARTH SCIENCES,195,16.
MLA Zhang, Bin,et al."Late Eocene magmatism of the eastern Qiangtang block (eastern Tibetan Plateau) and its geodynamic implications".JOURNAL OF ASIAN EARTH SCIENCES 195(2020):16.

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来源：地质与地球物理研究所

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