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A palaeomagnetic study of the Middle Permian and Middle Triassic limestones from Shan State, Myanmar: Implications for collision of the Sibumasu Terrane and Indochina Terrane

文献类型：期刊论文

作者Zhao, Jie4,6; Huang, Baochun5; Yan, Yonggang7; Bai, Qianhui8; Dong, Yunpeng4; Win, Zaw1; Aung, Hla Hla2; Yang, Xiaodong3
刊名GEOLOGICAL JOURNAL
出版日期2020-02-01
卷号55期号:2页码:1179-1194
关键词eastern Palaeotethys Middle Permian Middle Triassic palaeomagnetism Shan State Sibumasu Terrane Southeast Asia
ISSN号0072-1050
DOI10.1002/gj.3482
英文摘要We report herein a new palaeomagnetic study on the Middle Permian and Middle Triassic limestones from Shan State of eastern Myanmar, aiming to resolve the spatial location of the Sibumasu Terrane during the collision of tectonic blocks in Southeast Asia and to constrain the timing of convergence between the Sibumasu Terrane and Indochina Terrane. Based on the rock magnetic and palaeomagnetic experiments, three stable characteristic remnant magnetizations are recognized from limestone specimens of Middle Permian and Middle Triassic age. The characteristic Component C of the Middle Permian limestone passed the fold test at 95% confidence level, indicative of a pre-folding origin. The mean direction of this component is D = 10.7 degrees, I = 17.9 degrees (kappa = 130.3, alpha(95) = 10.8 degrees) before and D = 13.7 degrees, I = -25.3 degrees (kappa = 1894.9, alpha(95) = 2.8 degrees) after tilt correction, corresponding to a palaeomagnetic pole at 254.1 degrees E, 53.2 degrees N (A(95) = 1.7 degrees). This suggests that the Sibumasu Terrane was placed at a palaeolatitude of similar to 13.0 degrees S during the Middle Permian. The Component C separated from the Middle Triassic samples also passed the fold test with a mean direction of D = 207.3 degrees, I = -8.3 degrees (kappa = 12.9, alpha(95) = 6.2 degrees) before tilt correction and D = 205.6 degrees, I = -33.5 degrees (kappa = 27.1, alpha(95) = 4.2 degrees) after tilt correction, corresponding to a palaeomagnetic pole at 187.3 degrees E, 65.8 degrees N (dp/dm = 2.7 degrees/4.8 degrees). This implies that the Sibumasu Terrane was located at a palaeolatitude of similar to 18.3 degrees N during the Middle Triassic. Based upon the detailed palaeomagnetic analysis, this study supports the view that the collision of the Sibumasu Terrane and Indochina Terrance occurred during or before the Middle-Late Triassic times.
WOS关键词CHANGNING-MENGLIAN BELT ; KHONG VOLCANIC-ROCKS ; U-PB GEOCHRONOLOGY ; CHIANG-KHONG ; SOUTHWEST CHINA ; SOUTHEAST-ASIA ; TECTONIC EVOLUTION ; WESTERN YUNNAN ; BAOSHAN BLOCK ; RADIOLARIAN FAUNAS
资助项目National Natural Science Foundation of China[41190070] ; National Natural Science Foundation of China[41190071]
WOS研究方向Geology
语种英语
WOS记录号WOS:000512877800009
出版者WILEY
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; 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/132A11/95625]  
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, Jie; Huang, Baochun
作者单位1.Minist Educ, Dept Alternat Educ, Naypyitaw, Myanmar
2.Myanmar Engn Soc, Myanmar Earthquake Comm, Yangon, Myanmar
3.Univ Southampton, Natl Oceanog Ctr Southampton, Ocean & Earth Sci, Southampton, Hants, England
4.Northwest Univ, Dept Geol, State Key Lab Continental Dynam, Xian, Peoples R China
5.Peking Univ, Sch Earth & Space Sci, Key Lab Orogen & Crustal Evolut, Minist Educ, Beijing, Peoples R China
6.Chinese Acad Sci, State Key Lab Lithospher Evolut, Inst Geol & Geophys, Beijing, Peoples R China
7.Sun Yat Sen Univ, Sch Earth Sci & Engn, Guangdong Prov Key Lab Geodynam & Geohazards, Guangzhou, Peoples R China
8.Sino Shaanxi Nucl Ind Grp Geol Survey Co Ltd, Dept Geol, Xian, Peoples R China
推荐引用方式
GB/T 7714		 Zhao, Jie,Huang, Baochun,Yan, Yonggang,et al. A palaeomagnetic study of the Middle Permian and Middle Triassic limestones from Shan State, Myanmar: Implications for collision of the Sibumasu Terrane and Indochina Terrane[J]. GEOLOGICAL JOURNAL,2020,55(2):1179-1194.
APA Zhao, Jie.,Huang, Baochun.,Yan, Yonggang.,Bai, Qianhui.,Dong, Yunpeng.,...&Yang, Xiaodong.(2020).A palaeomagnetic study of the Middle Permian and Middle Triassic limestones from Shan State, Myanmar: Implications for collision of the Sibumasu Terrane and Indochina Terrane.GEOLOGICAL JOURNAL,55(2),1179-1194.
MLA Zhao, Jie,et al."A palaeomagnetic study of the Middle Permian and Middle Triassic limestones from Shan State, Myanmar: Implications for collision of the Sibumasu Terrane and Indochina Terrane".GEOLOGICAL JOURNAL 55.2(2020):1179-1194.

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来源：地质与地球物理研究所

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