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Bending of the Western Mongolian Blocks Initiated the Late Triassic Closure of the Mongol-Okhotsk Ocean and Formation of the Tuva-Mongol Orocline

文献类型：期刊论文

作者Zhao, Pan1; Appel, Erwin3; Deng, Chenglong1; Xu, Bei2
刊名TECTONICS
出版日期2023-05-01
卷号42期号:5页码:20
ISSN号0278-7407
关键词Paleomagnetism Late Triassic Mongol-Okhotsk Ocean Tuva-Mongol Orocline Mongolia
DOI10.1029/2022TC007475
英文摘要Bending of ribbon continents or arcs is an important tectonic process for reconstructing central Asia. Formation of the striking Tuva-Mongol Orocline by closure of the Mongol-Okhotsk Ocean (MOO) has long been proposed, but coupling of the two geological events has not been well illustrated, hindering our understanding of tectonic evolution of central Asia. In order to constrain age of initial closure of the MOO in its western segment and formation of the Tuva-Mongol Orocline, we performed paleomagnetic studies on the Late Triassic clastic rocks in the Amuria Block (AMB; 17 sites) and the Tarvagatay Block (TVB; 10 sites) of the western Mongolian blocks (WMB) on both sides of the Mongol-Okhotsk Suture. Rock magnetic investigations show hematite and magnetite as main magnetic carriers of the characteristic remanent magnetization (ChRM). The ChRM directions from both regions pass fold and/or reversal tests and can be considered as primary remanent magnetization. Combining the overlapped new paleomagnetic poles (AMB: ?/q) = 70.4 degrees N/233.8 degrees E, A(95) = 4.6 degrees; TVB: ?/q) = 70.5 degrees N/248.2 degrees E, A(95) = 9.0 degrees) with geological evidence, we propose that the bending of the WMB following its collision with the Siberia Craton resulted in the Late Triassic closure of the MOO in its western segment, and initiated the formation of the Tuva-Mongol Orocline.
WOS关键词CENTRAL-ASIA ; PALEOMAGNETIC CONSTRAINTS ; FOLD TEST ; ZAVKHAN TERRANE ; MAJOR BLOCKS ; POLAR WANDER ; SUTURE ZONE ; CHINA ; PALEOGEOGRAPHY ; EVOLUTION
资助项目National Nature Science Foundation of China[92155203] ; National Nature Science Foundation of China[41888101] ; National Key R & D Program of China[2017YFC0601302] ; Pioneer Hundred Talents Program of the Chinese Academy of Sciences ; University of Tubingen ; Alexander von Humboldt Foundation (Germany)
WOS研究方向Geochemistry & Geophysics
语种英语
出版者AMER GEOPHYSICAL UNION
WOS记录号WOS:001000279700001
资助机构National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Key R & D Program of China ; National Key R & D Program of China ; National Key R & D Program of China ; National Key R & D Program of China ; Pioneer Hundred Talents Program of the Chinese Academy of Sciences ; Pioneer Hundred Talents Program of the Chinese Academy of Sciences ; Pioneer Hundred Talents Program of the Chinese Academy of Sciences ; Pioneer Hundred Talents Program of the Chinese Academy of Sciences ; University of Tubingen ; University of Tubingen ; University of Tubingen ; University of Tubingen ; Alexander von Humboldt Foundation (Germany) ; Alexander von Humboldt Foundation (Germany) ; Alexander von Humboldt Foundation (Germany) ; Alexander von Humboldt Foundation (Germany) ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Key R & D Program of China ; National Key R & D Program of China ; National Key R & D Program of China ; National Key R & D Program of China ; Pioneer Hundred Talents Program of the Chinese Academy of Sciences ; Pioneer Hundred Talents Program of the Chinese Academy of Sciences ; Pioneer Hundred Talents Program of the Chinese Academy of Sciences ; Pioneer Hundred Talents Program of the Chinese Academy of Sciences ; University of Tubingen ; University of Tubingen ; University of Tubingen ; University of Tubingen ; Alexander von Humboldt Foundation (Germany) ; Alexander von Humboldt Foundation (Germany) ; Alexander von Humboldt Foundation (Germany) ; Alexander von Humboldt Foundation (Germany) ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Key R & D Program of China ; National Key R & D Program of China ; National Key R & D Program of China ; National Key R & D Program of China ; Pioneer Hundred Talents Program of the Chinese Academy of Sciences ; Pioneer Hundred Talents Program of the Chinese Academy of Sciences ; Pioneer Hundred Talents Program of the Chinese Academy of Sciences ; Pioneer Hundred Talents Program of the Chinese Academy of Sciences ; University of Tubingen ; University of Tubingen ; University of Tubingen ; University of Tubingen ; Alexander von Humboldt Foundation (Germany) ; Alexander von Humboldt Foundation (Germany) ; Alexander von Humboldt Foundation (Germany) ; Alexander von Humboldt Foundation (Germany) ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Key R & D Program of China ; National Key R & D Program of China ; National Key R & D Program of China ; National Key R & D Program of China ; Pioneer Hundred Talents Program of the Chinese Academy of Sciences ; Pioneer Hundred Talents Program of the Chinese Academy of Sciences ; Pioneer Hundred Talents Program of the Chinese Academy of Sciences ; Pioneer Hundred Talents Program of the Chinese Academy of Sciences ; University of Tubingen ; University of Tubingen ; University of Tubingen ; University of Tubingen ; Alexander von Humboldt Foundation (Germany) ; Alexander von Humboldt Foundation (Germany) ; Alexander von Humboldt Foundation (Germany) ; Alexander von Humboldt Foundation (Germany)
源URL[http://ir.iggcas.ac.cn/handle/132A11/110974]  
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Zhao, Pan
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China
2.Hebei GEO Univ, Shijiazhuang, Peoples R China
3.Univ Tubingen, Dept Geosci, Tubingen, Germany
推荐引用方式
GB/T 7714		 Zhao, Pan,Appel, Erwin,Deng, Chenglong,et al. Bending of the Western Mongolian Blocks Initiated the Late Triassic Closure of the Mongol-Okhotsk Ocean and Formation of the Tuva-Mongol Orocline[J]. TECTONICS,2023,42(5):20.
APA Zhao, Pan,Appel, Erwin,Deng, Chenglong,&Xu, Bei.(2023).Bending of the Western Mongolian Blocks Initiated the Late Triassic Closure of the Mongol-Okhotsk Ocean and Formation of the Tuva-Mongol Orocline.TECTONICS,42(5),20.
MLA Zhao, Pan,et al."Bending of the Western Mongolian Blocks Initiated the Late Triassic Closure of the Mongol-Okhotsk Ocean and Formation of the Tuva-Mongol Orocline".TECTONICS 42.5(2023):20.

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来源：地质与地球物理研究所

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