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Ca. 815 Ma intra-plate granitoids and mafic dykes from Emeishan pluton in the western Yangtze Block, SW China: A record of rifting during the breakup of Rodinia

文献类型：期刊论文

作者Zou, Hao2,3; Li, Yang2; Huang, Chang-Cheng2; Said, Nuru1,4; Jiang, Xiu-Wei2; Liu, Hang2; Li, Min2; Chen, Hai-Feng2; Liu, Chun-Mei2; Lan, Zhong-Wu3
刊名PRECAMBRIAN RESEARCH
出版日期2022-04-01
卷号371页码:21
关键词Rodinia supercontinent Emeishan complex Break-up U-Pb zircon age Hf-O isotopes
ISSN号0301-9268
DOI10.1016/j.precamres.2022.106569
英文摘要The western Yangtze Block, South China is characterized by voluminous Neoproterozoic extension-related volcano-sedimentary sequences and intrusions (e.g. Emeishan granitoid intrusion) and spatially associated mafic dykes. The origin and tectonic setting of Emeishan granitoid intrusion and mafic dykes in the Yangtze Block is poorly study. Understanding the origin and geodynamic setting of dykes and granitoid intrusion are significant in deciphering thermal structure and composition of mantle, tectonic evolution as well as crustal growth processes in the Yangtze Block. SIMS Zircon U-Pb dating of Emeishan granitoid intrusion and mafic dykes suggests that the granitoids (ca. 818 Ma) and mafic dykes (ca. 814 Ma) are contemporaneous. Compositionally, the Emeishan granitoids are restricted and characterized by high SiO2 (69.11-70.50 wt%), Na2O + K2O (3.52-4.13%) and Al2O3 (14.16-14.47%), but low CaO (1.78-2.03%), MgO (0.72-0.91%) contents. They feature strong LREEenrichment (La/YbN = 7.2-12.3) in conjunction with negative Eu anomalies. The mafic dykes have low SiO2 (48.09-48.65 wt%), K2O (1.94-2.12 wt%) and Na2O (1.64-1.75 wt%) contents, and high Mg# (61.67-62.26). On primitive mantle-normalized trace element plot, they are characterized by enrichment of LILEs and depletion of HFSEs. Both the mafic dykes and granitoids record similar zircon epsilon Hf(t) values (+2.2 to +12.1, +1.4 to +6.8), and zircon delta O-18 values (4.47 parts per thousand and 10.41 parts per thousand, 4.49 parts per thousand and 12.05 parts per thousand, respectively). The rifting-related geochemical signature of the Emeishan pluton and contemporaneous margin and intra-plate plume-related magmatism suggest that they were derived from mantle melting in extensional tectonic setting during mid-Neoproterozoic.
WOS关键词ZIRCON U-PB ; BIMODAL VOLCANIC-ROCKS ; A-TYPE GRANITES ; EASTERN TIBETAN PLATEAU ; OXYGEN-ISOTOPE EVIDENCE ; LARGE IGNEOUS PROVINCE ; SOUTH CHINA ; TRACE-ELEMENT ; MANTLE PLUME ; NEOPROTEROZOIC GRANITOIDS
资助项目China Postdoctoral Science Foundation[2019M650833] ; Open Fund Project of State Key Laboratory of Lithospheric Evolution[KDL-K201902] ; Open Fund Project of State Key Laboratory of Lithospheric Evolution[201608515058]
WOS研究方向Geology
语种英语
WOS记录号WOS:000796581800001
出版者ELSEVIER
资助机构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 ; 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 ; 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 ; 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
源URL[http://ir.iggcas.ac.cn/handle/132A11/105939]  
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
作者单位1.Univ Western Australia, Ctr Explorat Targeting, 35 Stirling Highway, Crawley, WA 6009, Australia
2.Chengdu Univ Technol, State Key Lab Oil & Gas Reservoir Geol & Exploitat, Chengdu 610059, Sichuan, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
4.King Abdulaziz Univ, Dept Mineral & Rocks, Jeddah 20206, Saudi Arabia
推荐引用方式
GB/T 7714		 Zou, Hao,Li, Yang,Huang, Chang-Cheng,et al. Ca. 815 Ma intra-plate granitoids and mafic dykes from Emeishan pluton in the western Yangtze Block, SW China: A record of rifting during the breakup of Rodinia[J]. PRECAMBRIAN RESEARCH,2022,371:21.
APA Zou, Hao.,Li, Yang.,Huang, Chang-Cheng.,Said, Nuru.,Jiang, Xiu-Wei.,...&Lan, Zhong-Wu.(2022).Ca. 815 Ma intra-plate granitoids and mafic dykes from Emeishan pluton in the western Yangtze Block, SW China: A record of rifting during the breakup of Rodinia.PRECAMBRIAN RESEARCH,371,21.
MLA Zou, Hao,et al."Ca. 815 Ma intra-plate granitoids and mafic dykes from Emeishan pluton in the western Yangtze Block, SW China: A record of rifting during the breakup of Rodinia".PRECAMBRIAN RESEARCH 371(2022):21.

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来源：地质与地球物理研究所

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