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Origin and evolution of the Neoproterozoic Dengganping Granitic Complex in the western margin of the Yangtze Block, SW China: Implications for breakup of Rodina Supercontinent

文献类型：期刊论文

作者Zou, Hao2,3; Bagas, Leon2,4,5; Li, Xin-Yu1,7; Liu, Hang2,6; Jiang, Xiu-Wei3; Li, Yang2,6
刊名LITHOS
出版日期2020-10-01
卷号370页码:23
关键词Rodinia Supercontinent Dengganping Complex Break-up U-Pb zircon age Hf-O-Nd isotopes
ISSN号0024-4937
DOI10.1016/j.lithos.2020.105602
英文摘要A better understanding of the origin and evolution of widespread Neoproterozoic granites along the western margin of the Yangtze Block is important in locating the position of South China within the Rodinia Supercontinent, and the mechanism by which the supercontinent was fragmented. Published and our new detailed geochronological and geochemical data from the Dengganping Complex show that it formed during an extended magmatic event during the Neoproterozoic. This was during the emplacement of a fractionated ca. 815 Ma syenogranite, which was followed by partial melting during ca. 740 Ma and the emplacement of a biotite monzogranite. The geochemistry of the syenogranite indicates it is: (1) a peraluminous high-K type of granite; (2) calc-alkaline; (3) fractionated; (4) enriched in Th, U, Zr, Hf and LREE (LREE/HREE values of 5.3-9); (5) depleted in Nb and Sr; (6) has a negative Eu anomaly (delta Eu = 0.3-0.5); (7) has whole rock epsilon(Nd)(t) value of -0.7 to +0.5; (8) has zircon epsilon(Hf)(t) value of -1.7 to +5.2; and (9) has zircon O-18 values ranging from 5.13 to 7.38 parts per thousand. These characteristics are indicative of a source derived from the partial melting of crustal material. The biotite monzogranite is: (i) peraluminous calc-alkaline to high-K calc-alkaline; (ii) enriched in LREE (LREE/HREE = 9.9-14.6), Rb, Ba, Th and U; (iii) depleted in Nb and Ta; (iv) has weak negative delta Eu and delta Ce anomalies; (v) has whole rock epsilon(Nd)(t) value of between -3.2 and -1.8; has relatively high positive zircon epsilon(Hf)(t) values of +4.1 to +13; and has zircon O-18 values ranging from 3.44 to 6.75 parts per thousand. These features are indicative of partial melting of a juvenile mafic crust that might have experienced a high-temperature water-rock interaction. By comparing the geochronology of Neoproterozoic magmatic rocks along the faulted western margin of the Yangtze Block, it is suggested that the region was part of the Rodinia Supercontinent when it started to breakup during widespread rifting between ca. 825 and 710 Ma. We believe the fault zone formed in response to an opening ocean was induced by the presence of a mantle plume during this period. (C) 2020 Elsevier B.V. All rights reserved.
WOS关键词ZIRCON U-PB ; A-TYPE GRANITES ; HF ISOTOPIC COMPOSITIONS ; LOW DELTA-O-18 GRANITES ; THICKENED LOWER CRUST ; SONGPAN-GANZI FLYSCH ; SOUTH QINLING BELT ; I-TYPE GRANITES ; NORTHERN MARGIN ; OXYGEN-ISOTOPE
资助项目National Natural Science Foundation of China[41702108] ; China Postdoctoral Science Foundation[2019M650833] ; Open Fund Project of State Key Laboratory of Lithospheric Evolution[SKL-K201902] ; Open Fund Project of State Key Laboratory for Mineral Deposits Research[2019-LAMD-K14] ; Everest Scientific Research Program of Chengdu University of Technology
WOS研究方向Geochemistry & Geophysics ; Mineralogy
语种英语
WOS记录号WOS:000558896300004
出版者ELSEVIER
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 Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Open Fund Project of State Key Laboratory of Lithospheric Evolution ; Open Fund Project of State Key Laboratory of Lithospheric Evolution ; Open Fund Project of State Key Laboratory of Lithospheric Evolution ; Open Fund Project of State Key Laboratory of Lithospheric Evolution ; Open Fund Project of State Key Laboratory for Mineral Deposits Research ; Open Fund Project of State Key Laboratory for Mineral Deposits Research ; Open Fund Project of State Key Laboratory for Mineral Deposits Research ; Open Fund Project of State Key Laboratory for Mineral Deposits Research ; Everest Scientific Research Program of Chengdu University of Technology ; Everest Scientific Research Program of Chengdu University of Technology ; Everest Scientific Research Program of Chengdu University of Technology ; Everest Scientific Research Program of Chengdu University of Technology ; 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 Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Open Fund Project of State Key Laboratory of Lithospheric Evolution ; Open Fund Project of State Key Laboratory of Lithospheric Evolution ; Open Fund Project of State Key Laboratory of Lithospheric Evolution ; Open Fund Project of State Key Laboratory of Lithospheric Evolution ; Open Fund Project of State Key Laboratory for Mineral Deposits Research ; Open Fund Project of State Key Laboratory for Mineral Deposits Research ; Open Fund Project of State Key Laboratory for Mineral Deposits Research ; Open Fund Project of State Key Laboratory for Mineral Deposits Research ; Everest Scientific Research Program of Chengdu University of Technology ; Everest Scientific Research Program of Chengdu University of Technology ; Everest Scientific Research Program of Chengdu University of Technology ; Everest Scientific Research Program of Chengdu University of Technology ; 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 Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Open Fund Project of State Key Laboratory of Lithospheric Evolution ; Open Fund Project of State Key Laboratory of Lithospheric Evolution ; Open Fund Project of State Key Laboratory of Lithospheric Evolution ; Open Fund Project of State Key Laboratory of Lithospheric Evolution ; Open Fund Project of State Key Laboratory for Mineral Deposits Research ; Open Fund Project of State Key Laboratory for Mineral Deposits Research ; Open Fund Project of State Key Laboratory for Mineral Deposits Research ; Open Fund Project of State Key Laboratory for Mineral Deposits Research ; Everest Scientific Research Program of Chengdu University of Technology ; Everest Scientific Research Program of Chengdu University of Technology ; Everest Scientific Research Program of Chengdu University of Technology ; Everest Scientific Research Program of Chengdu University of Technology ; 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 Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Open Fund Project of State Key Laboratory of Lithospheric Evolution ; Open Fund Project of State Key Laboratory of Lithospheric Evolution ; Open Fund Project of State Key Laboratory of Lithospheric Evolution ; Open Fund Project of State Key Laboratory of Lithospheric Evolution ; Open Fund Project of State Key Laboratory for Mineral Deposits Research ; Open Fund Project of State Key Laboratory for Mineral Deposits Research ; Open Fund Project of State Key Laboratory for Mineral Deposits Research ; Open Fund Project of State Key Laboratory for Mineral Deposits Research ; Everest Scientific Research Program of Chengdu University of Technology ; Everest Scientific Research Program of Chengdu University of Technology ; Everest Scientific Research Program of Chengdu University of Technology ; Everest Scientific Research Program of Chengdu University of Technology
源URL[http://ir.iggcas.ac.cn/handle/132A11/97623]  
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Zou, Hao; Bagas, Leon
作者单位1.Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Peoples R China
2.Chengdu Univ Technol, Key Lab Tecton Controls Mineralisat & Hydrocarbon, Minist Land & Resources, Chengdu 610059, Sichuan, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
4.Univ Western Australia, Ctr Explorat Targeting, 35 Stirling Highway, Crawley, WA 6009, Australia
5.China Geol Survey, Xian Ctr, 438 Youyi Rd, Xian 710054, Peoples R China
6.Nanjing Univ, State Key Lab Mineral Deposits Res, Nanjing 210023, Peoples R China
7.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Zou, Hao,Bagas, Leon,Li, Xin-Yu,et al. Origin and evolution of the Neoproterozoic Dengganping Granitic Complex in the western margin of the Yangtze Block, SW China: Implications for breakup of Rodina Supercontinent[J]. LITHOS,2020,370:23.
APA Zou, Hao,Bagas, Leon,Li, Xin-Yu,Liu, Hang,Jiang, Xiu-Wei,&Li, Yang.(2020).Origin and evolution of the Neoproterozoic Dengganping Granitic Complex in the western margin of the Yangtze Block, SW China: Implications for breakup of Rodina Supercontinent.LITHOS,370,23.
MLA Zou, Hao,et al."Origin and evolution of the Neoproterozoic Dengganping Granitic Complex in the western margin of the Yangtze Block, SW China: Implications for breakup of Rodina Supercontinent".LITHOS 370(2020):23.

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来源：地质与地球物理研究所

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