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Extensional magmatism caused by strain partitioning: insights from the mafic dikes hosted in Biesituobie batholith in West Junggar, CAOB

文献类型：期刊论文

作者Chen, Yichao4; Liu, Jiahui4; Zhou, Renjie3; Xiao, Wenjiao1,2,4; Zhang, Ji'en1; Zhang, Zhiyong1; Zhang, Qian W. L.4; Li, Zhen M. G.4; Wu, Chunming4
刊名INTERNATIONAL JOURNAL OF EARTH SCIENCES
出版日期2022-08-20
页码17
关键词Extensional magmatism Strain partitioning Geochemistry Geochronology CAOB
ISSN号1437-3254
DOI10.1007/s00531-022-02234-w
英文摘要The connection between magmatism and the tectonic environment is essential yet highly debatable. The West Junggar, CAOB, outcropped a swarm of norite-gabbro dikes hosted in the Biesituobie batholith. The dikes are a family of mafic magma consisting of nortite, norite-gabbro, and gabbro with equigranular, porphyritic, and cumulate textures. The mafic dikes represent various chemical compositions due to the magma evolution suggested by the different lithological textures, especially for MgO, CaO, Sr, and Eu, possibly caused by the crystal fractionation. But commonly, they show depleted Nb, Ta, Zr, Hf, Ti, and enriched Ba, U. Geochronology study by LA-ICP-MS gives zircon U-Pb age of 265 +/- 4 Ma, 269 +/- 1 Ma, 270 +/- 2 Ma for the mafic dikes, respectively. The mafic dikes show geochemical similarities with E-MORB type lava with minor subduction affinity. The low fraction on the LREE/HREE indicates that they were generated from a relatively shallow mantle with low pressure. The norite-gabbro dikes and the host batholith suggest a regional extension with crust thining upwelling of the mantle caused by strain partitioning. Regionally, the Permian extensional magmatism is distributed mainly in the "Yumin-Miaoergou axis, " perpendicular to the Darburt fault. The activation of the Darburt fault might cause the partition of regional transpression strain into simple shear along the strike-slip Darburt fault and pure shear perpendicular to the fault. The T-fracture parallel with the maximum principal stress of the pure shear causes crustal thinning and mantle upwelling, generating the extensional magmatism in the "Yumin-Miaoergou axis." This tectonic scenario might be the essential geodynamic background for extensional magmatism, which suggest that local extension might be coordinated with regional transpression, and a unified regional extension is not needed in such a model.
WOS关键词NW CHINA IMPLICATIONS ; A-TYPE GRANITES ; PALEOZOIC CRUSTAL GROWTH ; VOLCANIC-ROCK SERIES ; SAN-ANDREAS FAULT ; U-PB AGES ; TECTONIC IMPLICATIONS ; NORTH XINJIANG ; TRACE-ELEMENT ; SLAB WINDOW
资助项目National Natural Science Foundation of China[41902231] ; National Natural Science Foundation of China[42172247] ; National Natural Science Foundation of China[41888101] ; National Natural Science Foundation of China[41730215] ; Key Research Program of Frontier Sciences, CAS[QYZDJ-SSW-DQC036] ; Fundamental Research Funds for the Central Universities[E1E40416X2] ; China Postdoctoral Council[2018M631556]
WOS研究方向Geology
语种英语
WOS记录号WOS:000842996500002
出版者SPRINGER
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; China Postdoctoral Council ; China Postdoctoral Council ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; China Postdoctoral Council ; China Postdoctoral Council ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; China Postdoctoral Council ; China Postdoctoral Council ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; China Postdoctoral Council ; China Postdoctoral Council
源URL[http://ir.iggcas.ac.cn/handle/132A11/108412]  
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Chen, Yichao
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Xinjiang Res Ctr Mineral Resources, Xinjiang Inst Ecol & Geog, Urumqi 830011, Peoples R China
3.Univ Queensland, Sch Earth & Environm Sci, Brisbane, Qld 4072, Australia
4.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Chen, Yichao,Liu, Jiahui,Zhou, Renjie,et al. Extensional magmatism caused by strain partitioning: insights from the mafic dikes hosted in Biesituobie batholith in West Junggar, CAOB[J]. INTERNATIONAL JOURNAL OF EARTH SCIENCES,2022:17.
APA Chen, Yichao.,Liu, Jiahui.,Zhou, Renjie.,Xiao, Wenjiao.,Zhang, Ji'en.,...&Wu, Chunming.(2022).Extensional magmatism caused by strain partitioning: insights from the mafic dikes hosted in Biesituobie batholith in West Junggar, CAOB.INTERNATIONAL JOURNAL OF EARTH SCIENCES,17.
MLA Chen, Yichao,et al."Extensional magmatism caused by strain partitioning: insights from the mafic dikes hosted in Biesituobie batholith in West Junggar, CAOB".INTERNATIONAL JOURNAL OF EARTH SCIENCES (2022):17.

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来源：地质与地球物理研究所

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