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Permian-Triassic magmatic rocks in the Middle Gobi volcanic-plutonic belt, Mongolia: revisiting the scissor-like closure model of the Mongol-Okhotsk Ocean

文献类型：期刊论文

作者Zhu, Mingshuai1,2; Zhang, Fuqin1,2; Miao, Laicheng1,2; Ganbat, Ariuntsetseg3; Baatar, Munkhtsengel4; Anaad, Chimedtseren4; Yang, Shunhu1,2; Wang, Zeli5
刊名INTERNATIONAL JOURNAL OF EARTH SCIENCES
出版日期2022-11-28
页码23
ISSN号1437-3254
关键词Mongol-Okhotsk Ocean Middle Gobi volcanic-plutonic belt Scissor-like Final closure
DOI10.1007/s00531-022-02271-5
英文摘要As the youngest segment of the Central Asian Orogenic Belt, the Mongol-Okhotsk Belt is critical for understanding the final amalgamation of East Asia. However, whether the Mongol-Okhotsk Ocean closed in a scissor-like manner remains controversial, in part because the spatial and temporal change of the subduction-related magmatic records are not well constrained. This paper presents new zircon U-Pb ages and whole-rock geochemical data for the Permian-Triassic magmatic rocks in the Middle Gobi belt. Zircon U-Pb dating indicates that the Luus dacite, Luus andesite, East Monhhaan granite and South Monhhaan rhyolite yielded U-Pb ages of 272 +/- 4 Ma, 221 +/- 2 Ma, 256 +/- 2 Ma and 229 +/- 2 Ma, respectively. The Luus dacite and South Monhhaan rhyolite show enrichment in LREE and LILE and negative Nb, Ta and Ti anomalies, indicating genesis in a subduction zone setting. The Luus andesite shows adakite geochemical features and was likely formed from partial melting of subducted oceanic crust. The East Monhhaan granite is of peraluminous S-type granite. These Permian-Triassic magmatic rocks are likely formed in an active margin related to the southward subduction of the Mongol-Okhotsk Ocean. Based on available data, we suggest that there is no significant age difference from west to east for the subduction-related magmatic complex at the southern margin of the Mongol-Okhotsk Ocean. Various Late Triassic subduction-related records in central Mongolia indicate the western segment of the Mongol-Okhotsk Ocean was finally closed during Jurassic, nearly contemporary with final closure of the eastern segment. Thus, we argue that the Mongol-Okhotsk Ocean was not likely closed in a scissor-like pattern as previously thought.
WOS关键词ZIRCON U-PB ; S-TYPE GRANITES ; A-TYPE GRANITES ; PORPHYRY CU-MO ; TECTONIC EVOLUTION ; METASEDIMENTARY ROCKS ; CRUSTAL GROWTH ; ERGUNA MASSIF ; FOLD BELT ; NORTHEASTERN MONGOLIA
资助项目Strategic Priority Research Program of Chinese Academy of Sciences[XDB 41000000] ; National Natural Science Foundation of China[42272262] ; National Natural Science Foundation of China[42172241]
WOS研究方向Geology
语种英语
出版者SPRINGER
WOS记录号WOS:000889413800001
资助机构Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/107639]  
专题地质与地球物理研究所_中国科学院矿产资源研究重点实验室
通讯作者Zhu, Mingshuai
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China
3.Univ Hong Kong, Dept Earth Sci, Pok Fu Lam, Hong Kong, Peoples R China
4.Mongolian Univ Sci & Technol, Geosci Ctr, Ulaanbaatar 120646, Mongolia
5.Shandong Univ Sci & Technol, Shandong Key Lab Deposit Mineralizat & Sedimentar, Qingdao 266590, Peoples R China
推荐引用方式
GB/T 7714		 Zhu, Mingshuai,Zhang, Fuqin,Miao, Laicheng,et al. Permian-Triassic magmatic rocks in the Middle Gobi volcanic-plutonic belt, Mongolia: revisiting the scissor-like closure model of the Mongol-Okhotsk Ocean[J]. INTERNATIONAL JOURNAL OF EARTH SCIENCES,2022:23.
APA Zhu, Mingshuai.,Zhang, Fuqin.,Miao, Laicheng.,Ganbat, Ariuntsetseg.,Baatar, Munkhtsengel.,...&Wang, Zeli.(2022).Permian-Triassic magmatic rocks in the Middle Gobi volcanic-plutonic belt, Mongolia: revisiting the scissor-like closure model of the Mongol-Okhotsk Ocean.INTERNATIONAL JOURNAL OF EARTH SCIENCES,23.
MLA Zhu, Mingshuai,et al."Permian-Triassic magmatic rocks in the Middle Gobi volcanic-plutonic belt, Mongolia: revisiting the scissor-like closure model of the Mongol-Okhotsk Ocean".INTERNATIONAL JOURNAL OF EARTH SCIENCES (2022):23.

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来源：地质与地球物理研究所

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