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Zircon U-Pb Ages and Geochemistry of Permo-Carboniferous Mafic Intrusions in the Xilinhot Area, Inner Mongolia: Constraints on the Northward Subduction of the Paleo-Asian Ocean
Wang Ke1; Li Yilong1; Xiao Wenjiao2; Zheng Jianping1; Brouwer, Fraukje M.3
2019-10-01
Source PublicationACTA GEOLOGICA SINICA-ENGLISH EDITION
ISSN1000-9515
Volume93Issue:5Pages:1261-1280
AbstractThe Central Asian Orogenic Belt (CAOB) resulted from accretion during the Paleozoic subduction of the Paleo-Asian Ocean. The Xilinhot area in Inner Mongolia is located in the northern subduction zone of the central-eastern CAOB and outcropped a large number of late Paleozoic mafic intrusions. The characteristics of magma source and tectonic setting of the mafic intrusions and their response to the closure process of the Paleo-Asian Ocean are still controversial. This study presents LA-ICPMS zircon U-Pb ages and geochemical features of mafic intrusions in the Xilinhot area to constrain the northward subduction of the Paleo-Asian Ocean. The mafic intrusions consist of gabbro, hornblende gabbro, and diabase. Their intrusion times can be divided into three stages of 326-321 Ma, 276 Ma and 254 Ma by zircon U-Pb ages. The first two stages of the 326-276 Ma intrusions mostly originated from subduction-modified continental lithospheric mantle sources that underwent a variable degree partial melting (5-30%), recording the subduction of oceanic crust. The third stage of the 254 Ma mafic rocks also show arc-related features. The primary magma compositions calculated by PRIMELT2 modeling on three samples of similar to 326 Ma and two samples of similar to 254 Ma show that these mafic samples are characterized by a variable range in SiO2 (47.51-51.47 wt%), Al2O3 (11.46-15.55 wt%), sigma FeO (8.27-9.61 wt%), MgO (13.01-15.18 wt%) and CaO (9.13-11.67 wt%), consisting with the features between enriched mantle and lower continental crust. The source mantle melting of mafic intrusions occurred under temperatures of 1302-1351 degrees C and pressures of 0.92-1.30 GPa. The magmatic processes occurred near the crust-mantle boundary at about 33-45 km underground. Combined with previous studies, it is concluded that Carboniferous to early Permian (similar to 326-275 Ma) northward subduction of the Paleo-Asian oceanic crust led to the formation of the mafic magmatism in the Baolidao arc zone. The whole region had entered the collision environment at similar to 254 Ma, but with subduction-related environments locally. The final collision between the North China craton and the South Mongolian microcontinent may have lasted until ca. 230 Ma.
KeywordLA-ICPMS zircon U-Pb age geochemistry mafic intrusions Paleo-Asian Ocean Central Asian Orogenic Belt
DOI10.1111/1755-6724.14386
Funding OrganizationNational Key R&D Program of China ; National Key R&D Program of China ; 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, China University of Geosciences (Wuhan) ; Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan) ; National Key R&D Program of China ; National Key R&D Program of China ; 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, China University of Geosciences (Wuhan) ; Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan) ; National Key R&D Program of China ; National Key R&D Program of China ; 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, China University of Geosciences (Wuhan) ; Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan) ; National Key R&D Program of China ; National Key R&D Program of China ; 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, China University of Geosciences (Wuhan) ; Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan)
WOS KeywordPHANEROZOIC CONTINENTAL GROWTH ; DAXINGANLING OROGENIC BELT ; METASOMATIC MANTLE SOURCE ; SUTURE ZONE CONSTRAINTS ; BIMODAL VOLCANIC-ROCKS ; TRACE-ELEMENT ; TECTONIC EVOLUTION ; CHINA IMPLICATIONS ; SOLONKER SUTURE ; GEOLOGICAL SIGNIFICANCE
Language英语
Funding ProjectNational Key R&D Program of China[2016YFC0600403] ; National Key R&D Program of China[2017YFC0601206] ; National Natural Science Foundation of China[41872063] ; National Natural Science Foundation of China[41930215] ; National Natural Science Foundation of China[41520104003] ; National Natural Science Foundation of China[41888101] ; Key Research Program of Frontier Sciences, CAS[QYZDJ-SSW-SYS012] ; Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan)[CUGL170404] ; Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan)[CUG160232]
Funding OrganizationNational Key R&D Program of China ; National Key R&D Program of China ; 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, China University of Geosciences (Wuhan) ; Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan) ; National Key R&D Program of China ; National Key R&D Program of China ; 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, China University of Geosciences (Wuhan) ; Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan) ; National Key R&D Program of China ; National Key R&D Program of China ; 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, China University of Geosciences (Wuhan) ; Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan) ; National Key R&D Program of China ; National Key R&D Program of China ; 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, China University of Geosciences (Wuhan) ; Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan)
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000493023200008
PublisherWILEY
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/95711
Collection岩石圈演化国家重点实验室
Corresponding AuthorLi Yilong
Affiliation1.China Univ Geosci, Sch Earth Sci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Hubei, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
3.Vrije Univ Amsterdam, Dept Earth Sci, Geol & Geochem Grp, Boelelaan 1085, NL-1081 HV Amsterdam, Netherlands
Recommended Citation
GB/T 7714
Wang Ke,Li Yilong,Xiao Wenjiao,et al. Zircon U-Pb Ages and Geochemistry of Permo-Carboniferous Mafic Intrusions in the Xilinhot Area, Inner Mongolia: Constraints on the Northward Subduction of the Paleo-Asian Ocean[J]. ACTA GEOLOGICA SINICA-ENGLISH EDITION,2019,93(5):1261-1280.
APA Wang Ke,Li Yilong,Xiao Wenjiao,Zheng Jianping,&Brouwer, Fraukje M..(2019).Zircon U-Pb Ages and Geochemistry of Permo-Carboniferous Mafic Intrusions in the Xilinhot Area, Inner Mongolia: Constraints on the Northward Subduction of the Paleo-Asian Ocean.ACTA GEOLOGICA SINICA-ENGLISH EDITION,93(5),1261-1280.
MLA Wang Ke,et al."Zircon U-Pb Ages and Geochemistry of Permo-Carboniferous Mafic Intrusions in the Xilinhot Area, Inner Mongolia: Constraints on the Northward Subduction of the Paleo-Asian Ocean".ACTA GEOLOGICA SINICA-ENGLISH EDITION 93.5(2019):1261-1280.
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