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Opposite facing dipping structure in the uppermost mantle beneath the central Tien Shan from Pn traveltime tomography

文献类型：期刊论文

作者Hapaer, Talihaer1,2,3; Tang, Qingya1,2; Sun, Weijia1; Ao, Songjian4; Zhao, Liang2,4; Hu, Jiamin1,2; Jiang, Mengfan1; Xiao, Wenjiao4,5
刊名INTERNATIONAL JOURNAL OF EARTH SCIENCES
出版日期2022-02-03
页码14
关键词Pn tomography Uppermost mantle Double subduction Tien Shan Mantle plume
ISSN号1437-3254
DOI10.1007/s00531-022-02162-9
英文摘要The Tien Shan orogenic belt is located in the western region of central Asia, which has been previously considered to have formed in the Paleozoic and reactivated in the Cenozoic. However, the dynamic processes and deep detailed structure of the Tien Shan orogen remain elusive. Seismic studies are expected to provide profound clues on the deep structure and dynamic mechanism of the mountain-building process. Regional Pn traveltime tomography provides opportunities for constructing a more detailed P-wave velocity model of the uppermost mantle linking the shallow crust and the upper mantle. In this work, a 3-D P-wave high-resolution velocity model in the uppermost mantle of the western and central Tien Shan is constructed by inverting the 20,940 Pn arrival time of the 1108 local and regional earthquakes retrieved from the ISC-EHB catalog. The 3-D fast-marching tomography (FMTOMO) package is used to invert the 3-D uppermost mantle velocity model with a resolution of 1 degrees x 1 degrees. We clearly observe descending high-velocity anomalies, extending from the lower crust down to 85 km, suggesting double subduction of the Kazakh lithosphere in the north and Tarim lithosphere in the south beneath central Tien Shan. Furthermore, a prominent low-velocity feature in the upper mantle of central Tien Shan might result from asthenospheric upwelling. The high-velocity anomaly in the upper mantle of the western Tien Shan may suggest the southward subduction of the Kazakh plate to the western Tien Shan and Fergana basins. A significant low-velocity anomaly in the uppermost mantle beneath the southwestern Tarim Basin might result from plume intrusion with evidence of mantle xenolith or plume-lithosphere interaction and its consequent upwelling.
WOS关键词WAVE VELOCITY STRUCTURE ; LARGE IGNEOUS PROVINCE ; TIAN-SHAN ; NW CHINA ; LITHOSPHERIC STRUCTURE ; AMBIENT NOISE ; AZIMUTHAL ANISOTROPY ; RECEIVER FUNCTION ; TARIM ; CRUST
资助项目National Natural Science Foundation of China[41888101] ; National Natural Science Foundation of China[42022026] ; National Natural Science Foundation of China[41822204] ; National Natural Science Foundation of China[41720104006] ; National Natural Science Foundation of China[41774060] ; National Key R&D Program of China[2017YFC0601206] ; Youth Innovation Promotion Association CAS
WOS研究方向Geology
语种英语
WOS记录号WOS:000750694500001
出版者SPRINGER
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 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 ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; 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 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 ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; 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 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 ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; 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 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 ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS
源URL[http://ir.iggcas.ac.cn/handle/132A11/104032]  
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
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Sun, Weijia
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China
2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
3.Southern Marine Sci & Engn Guangdong Lab Zhuhai, Zhuhai 519080, Peoples R China
4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
5.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Xinjiang Res Ctr Mineral Resources, Urumqi 830011, Peoples R China
推荐引用方式
GB/T 7714		 Hapaer, Talihaer,Tang, Qingya,Sun, Weijia,et al. Opposite facing dipping structure in the uppermost mantle beneath the central Tien Shan from Pn traveltime tomography[J]. INTERNATIONAL JOURNAL OF EARTH SCIENCES,2022:14.
APA Hapaer, Talihaer.,Tang, Qingya.,Sun, Weijia.,Ao, Songjian.,Zhao, Liang.,...&Xiao, Wenjiao.(2022).Opposite facing dipping structure in the uppermost mantle beneath the central Tien Shan from Pn traveltime tomography.INTERNATIONAL JOURNAL OF EARTH SCIENCES,14.
MLA Hapaer, Talihaer,et al."Opposite facing dipping structure in the uppermost mantle beneath the central Tien Shan from Pn traveltime tomography".INTERNATIONAL JOURNAL OF EARTH SCIENCES (2022):14.

入库方式： OAI收割

来源：地质与地球物理研究所

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