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
文献类型：期刊论文
| 作者 | Wang Ke1; Li Yilong1; Xiao Wenjiao2; Zheng Jianping1; Brouwer, Fraukje M.3 |
| 刊名 | ACTA GEOLOGICA SINICA-ENGLISH EDITION
 |
| 出版日期 | 2019-10-01 |
| 卷号 | 93期号:5页码:1261-1280 |
| 关键词 | LA-ICPMS zircon U-Pb age geochemistry mafic intrusions Paleo-Asian Ocean Central Asian Orogenic Belt |
| ISSN号 | 1000-9515 |
| DOI | 10.1111/1755-6724.14386 |
| 英文摘要 | The 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. |
| WOS关键词 | PHANEROZOIC CONTINENTAL GROWTH ; DAXINGANLING OROGENIC BELT ; METASOMATIC MANTLE SOURCE ; SUTURE ZONE CONSTRAINTS ; BIMODAL VOLCANIC-ROCKS ; TRACE-ELEMENT ; TECTONIC EVOLUTION ; CHINA IMPLICATIONS ; SOLONKER SUTURE ; GEOLOGICAL SIGNIFICANCE |
| 资助项目 | National 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] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000493023200008 |
| 出版者 | WILEY |
| 资助机构 | 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) ; 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) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/95711]  |
| 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 | Li Yilong |
| 作者单位 | 1.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 |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：地质与地球物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。