IGGCAS OpenIR  > 新生代地质与环境院重点实验室
Late Eocene magmatism of the eastern Qiangtang block (eastern Tibetan Plateau) and its geodynamic implications
Zhang, Bin1,2,3,4; Liu, Jiaqi1,2,3; Chen, Wen4; Zhu, Zeyang1,2,3; Sun, Chunqing1,2,3
2020-06-15
Source PublicationJOURNAL OF ASIAN EARTH SCIENCES
ISSN1367-9120
Volume195Pages:16
AbstractPost-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.
KeywordTibetan Plateau The eastern Qiangtang block Eocene magmatism Magmatic recharge Uplift
DOI10.1016/j.jseaes.2020.104329
Funding OrganizationNational 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
WOS KeywordPORPHYRY COPPER-DEPOSIT ; CU-MO DEPOSIT ; TRACE-ELEMENT COMPOSITION ; U-PB ; LITHOSPHERIC MANTLE ; TECTONIC EVOLUTION ; CONTINENTAL-CRUST ; ULTRAPOTASSIC MAGMATISM ; CENOZOIC VOLCANISM ; THERMAL HISTORY
Language英语
Funding ProjectNational Natural Science Foundation of China[41772357] ; China Scholarship Council[201804910410]
Funding OrganizationNational 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
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000536141200003
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/96683
Collection新生代地质与环境院重点实验室
Corresponding AuthorLiu, Jiaqi; Chen, Wen
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China
4.Chinese Acad Geol Sci, Inst Geol, Lab Isotope Thermochronol, Key Lab Deep Dynam, Beijing 100037, Peoples R China
First Author AffilicationKey Laboratory of Cenozoic Geology and Environment, Chinese Academy of Sciences;  Institute of Geology and Geophysics, Chinese Academy of Sciences
Corresponding Author AffilicationKey Laboratory of Cenozoic Geology and Environment, Chinese Academy of Sciences;  Institute of Geology and Geophysics, Chinese Academy of Sciences
Recommended Citation
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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