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Seismic structure across central Myanmar from joint inversion of receiver functions and Rayleigh wave dispersion

文献类型：期刊论文

作者Bai, Yiming1,7,8; He, Yumei1,4,7; Yuan, Xiaohui8; Tilmann, Frederik3,8; Ai, Yinshuang1,4,7; Jiang, Mingming1,4,7; Hou, Guangbing7; Mon, Chit Thet2,7; Thant, Myo6; Sein, Kyaing5
刊名TECTONOPHYSICS
出版日期2021-11-05
卷号818页码:13
ISSN号0040-1951
关键词Myanmar Subduction zone Joint inversion S-wave velocity structure Seismic discontinuity
DOI10.1016/j.tecto.2021.229068
英文摘要The active tectonics in Myanmar is governed by the ongoing northward indentation and obliquely-eastward subduction of India into Eurasia. So far, detailed seismic structure of the crust and uppermost mantle at the eastern flank of the India-Eurasia collision zone remains highly debated. With seismic waveforms recorded at 79 broadband stations in Myanmar, we build a regional shear velocity model in the depth range of 0-80 km by joint inversion of ambient noise derived Rayleigh wave dispersion and P-wave receiver functions. Common conversion point stacking was performed along two representative profiles. We observe clear variations in the seismic velocity and discontinuity structures beneath this region. 1) A sedimentary layer covers the eastern fore-arc trough of the Central Myanmar Basin, with shear velocity less than 2.5 km/s and thickness increasing from similar to 8 km at 22 degrees N to similar to 18 km at 23 degrees N. The fore-arc Chindwin basin is evidently thicker than the back-arc Shwebo basin, an abrupt drop in sediment thickness towards the east appears immediately below the Wuntho-Popa magmatic arc. 2) Crustal low-velocity (LV) anomalies (<3.3 km/s) in the Indo-Burma Ranges probably reflect the Bengal sediments accreted to the toe of the overlying Burma plate, 3) The underlying LV layer with a thickness of over 20 km below the Burma Moho (30-40 km in depth) is indicative of the eastward subduction of the Indian continental crust, the top boundary of which is imaged with a dip angle of similar to 20 degrees. 4) Upper mantle LV anomalies filling the majority of the back-arc domain at depths greater than 60 km display a connection to a small-scale, subcrustal LV body beneath the Monywa volcano, possibly forming a fluid- or melt-rich mantle channel.
WOS关键词EASTERN HIMALAYAN ; CRUSTAL STRUCTURE ; TIBETAN PLATEAU ; UPPER-MANTLE ; ARC BASIN ; FORE-ARC ; BURMA ; SUBDUCTION ; BENEATH ; TECTONICS
资助项目National Natural Science Foundation of China[91755214] ; National Natural Science Foundation of China[42030309] ; National Natural Science Foundation of China[41490612] ; Strategic Priority Research Program (B) of Chinese Academy of Sciences[XDB18000000] ; International Partnership Program of the Chinese Academy of Sciences[GJHZ1776] ; China Scholarship Council[201804910411]
WOS研究方向Geochemistry & Geophysics
语种英语
出版者ELSEVIER
WOS记录号WOS:000703690400003
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 ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; International Partnership Program of the Chinese Academy of Sciences ; International Partnership Program of the Chinese Academy of Sciences ; International Partnership Program of the Chinese Academy of Sciences ; International Partnership Program of the Chinese Academy of Sciences ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; 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 (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; International Partnership Program of the Chinese Academy of Sciences ; International Partnership Program of the Chinese Academy of Sciences ; International Partnership Program of the Chinese Academy of Sciences ; International Partnership Program of the Chinese Academy of Sciences ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; 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 (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; International Partnership Program of the Chinese Academy of Sciences ; International Partnership Program of the Chinese Academy of Sciences ; International Partnership Program of the Chinese Academy of Sciences ; International Partnership Program of the Chinese Academy of Sciences ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; 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 (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; International Partnership Program of the Chinese Academy of Sciences ; International Partnership Program of the Chinese Academy of Sciences ; International Partnership Program of the Chinese Academy of Sciences ; International Partnership Program of the Chinese Academy of Sciences ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council
源URL[http://ir.iggcas.ac.cn/handle/132A11/102718]  
专题地质与地球物理研究所_中国科学院地球与行星物理重点实验室
通讯作者Ai, Yinshuang
作者单位1.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
2.Dagon Univ, Dept Geol, Yangon, Myanmar
3.Free Univ Berlin, Malteserstr 74-100, D-12249 Berlin, Germany
4.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
5.Myanmar Geosci Soc, Yangon, Myanmar
6.Univ Yangon, Dept Geol, Yangon 11041, Myanmar
7.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China
8.Deutsch GeoForschungsZentrum GFZ, D-14473 Potsdam, Germany
推荐引用方式
GB/T 7714		 Bai, Yiming,He, Yumei,Yuan, Xiaohui,et al. Seismic structure across central Myanmar from joint inversion of receiver functions and Rayleigh wave dispersion[J]. TECTONOPHYSICS,2021,818:13.
APA Bai, Yiming.,He, Yumei.,Yuan, Xiaohui.,Tilmann, Frederik.,Ai, Yinshuang.,...&Sein, Kyaing.(2021).Seismic structure across central Myanmar from joint inversion of receiver functions and Rayleigh wave dispersion.TECTONOPHYSICS,818,13.
MLA Bai, Yiming,et al."Seismic structure across central Myanmar from joint inversion of receiver functions and Rayleigh wave dispersion".TECTONOPHYSICS 818(2021):13.

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来源：地质与地球物理研究所

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