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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
Zhao, Jie1,3; Huang, Baochun2; Yan, Yonggang4; Bai, Qianhui5; Dong, Yunpeng1; Win, Zaw6; Aung, Hla Hla7; Yang, Xiaodong8
2020-02-01
Source PublicationGEOLOGICAL JOURNAL
ISSN0072-1050
Volume55Issue:2Pages:1179-1194
AbstractWe 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.
Keywordeastern Palaeotethys Middle Permian Middle Triassic palaeomagnetism Shan State Sibumasu Terrane Southeast Asia
DOI10.1002/gj.3482
Funding OrganizationNational 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
WOS KeywordCHANGNING-MENGLIAN BELT ; KHONG VOLCANIC-ROCKS ; U-PB GEOCHRONOLOGY ; CHIANG-KHONG ; SOUTHWEST CHINA ; SOUTHEAST-ASIA ; TECTONIC EVOLUTION ; WESTERN YUNNAN ; BAOSHAN BLOCK ; RADIOLARIAN FAUNAS
Language英语
Funding ProjectNational Natural Science Foundation of China[41190070] ; National Natural Science Foundation of China[41190071]
Funding OrganizationNational 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
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000512877800009
PublisherWILEY
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/95625
Collection岩石圈演化国家重点实验室
Corresponding AuthorZhao, Jie; Huang, Baochun
Affiliation1.Northwest Univ, Dept Geol, State Key Lab Continental Dynam, Xian, Peoples R China
2.Peking Univ, Sch Earth & Space Sci, Key Lab Orogen & Crustal Evolut, Minist Educ, Beijing, Peoples R China
3.Chinese Acad Sci, State Key Lab Lithospher Evolut, Inst Geol & Geophys, Beijing, Peoples R China
4.Sun Yat Sen Univ, Sch Earth Sci & Engn, Guangdong Prov Key Lab Geodynam & Geohazards, Guangzhou, Peoples R China
5.Sino Shaanxi Nucl Ind Grp Geol Survey Co Ltd, Dept Geol, Xian, Peoples R China
6.Minist Educ, Dept Alternat Educ, Naypyitaw, Myanmar
7.Myanmar Engn Soc, Myanmar Earthquake Comm, Yangon, Myanmar
8.Univ Southampton, Natl Oceanog Ctr Southampton, Ocean & Earth Sci, Southampton, Hants, England
Recommended Citation
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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