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The youngest matrix of 234 Ma of the Kanguer accretionary melange containing blocks of N-MORB basalts: constraints on the northward subduction of the Paleo-Asian Kanguer Ocean in the Eastern Tianshan of the Southern Altaids

文献类型：期刊论文

作者Ao, Songjian1,4,5; Mao, Qigui2,6; Windley, Brian F.3; Song, Dongfang1,4,5; Zhang, Zhiyong1,4,5; Zhang, Ji'en1,4,5; Wan, Bo1,4,5; Han, Chunming1,4,5; Xiao, Wenjiao1,4,5,6
刊名INTERNATIONAL JOURNAL OF EARTH SCIENCES
出版日期2021-02-07
页码18
关键词Detrital zircon U– pb ages Accretionary mé lange Final amalgamation time Altaids
ISSN号1437-3254
DOI10.1007/s00531-021-01990-5
英文摘要The Altaids accreted around, and grew southward, from the Siberian craton, but the time of final amalgamation of this orogen is still controversial. The Eastern Tianshan in the southernmost Altaids is characterized by multiple, late, accreted arcs and thus is an ideal tectonic environment to answer the time of final amalgamation of the Altaids. In this study we report the results of new field-based lithological mapping and structural analysis on the Kanguer melange in the Eastern Tianshan, which is composed of blocks of basalt, chert, limestone, and other rocks within a strongly deformed and cleaved matrix of sandstone and schist. Our geochemical and isotopic data of basaltic blocks from several parts of the Kanguer melange show they are relics of Normal-Mid-Ocean-Ridge (N-MORB)-type oceanic lithosphere, and U-Pb ages and Hf isotopes of detrital zircons from the matrix sandstones indicate they were derived only from the Dananhu arc to the north. Accordingly, our interpretation is that the Kanguer melange was part of an accretionary complex that fringed the Dananhu arc, and therefore the subduction polarity of the Kanguer Ocean was to the north (present coordinates). The maximum depositional ages (MDAs) of our three sandstone samples (08K01, 08K02, and 08K03) from the melange matrix were 234 +/- 14 Ma, 242.5 +/- 1.3 Ma, and 236 +/- 2.0 Ma respectively, indicating that the Kanguer Ocean was still being subducted at ca. 234 Ma, and the accretion of the Kanguer melange must have lasted until that time, when the accretionary complex was still located opposite to the Yamansu-CTS accretionary complex to the south. Thus, the final amalgamation of the Dananhu and Yanmansu-CTS arcs took place by the welding of two accretionary complexes in the late Middle Triassic (Ladinian) in this part of the southern Altaids. Integration with relevant amalgamation histories throughout the Tianshan indicates that the time of terminal amalgamation in the southern Altaids was probably in the Middle-Late Triassic, which is much younger than previously envisaged.
资助项目National Natural Science Foundation of China[41822204] ; National Natural Science Foundation of China[41888101] ; National Natural Science Foundation of China[91855207] ; National Key R&D Program of China[2017YFC0601206] ; Key Research Program of Frontier Sciences of CAS[QYZDJ-SSW-SYS012] ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences (CAS)[XDB18020203] ; CAS Project of the China-Pakistan Joint Research Center on Earth Sciences[131551KYSB20200021]
WOS研究方向Geology
语种英语
WOS记录号WOS:000615761900001
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 ; Key Research Program of Frontier Sciences of CAS ; Key Research Program of Frontier Sciences of CAS ; Key Research Program of Frontier Sciences of CAS ; Key Research Program of Frontier Sciences of CAS ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences (CAS) ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences (CAS) ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences (CAS) ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences (CAS) ; CAS Project of the China-Pakistan Joint Research Center on Earth Sciences ; CAS Project of the China-Pakistan Joint Research Center on Earth Sciences ; CAS Project of the China-Pakistan Joint Research Center on Earth Sciences ; CAS Project of the China-Pakistan Joint Research Center on Earth Sciences ; 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 ; Key Research Program of Frontier Sciences of CAS ; Key Research Program of Frontier Sciences of CAS ; Key Research Program of Frontier Sciences of CAS ; Key Research Program of Frontier Sciences of CAS ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences (CAS) ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences (CAS) ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences (CAS) ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences (CAS) ; CAS Project of the China-Pakistan Joint Research Center on Earth Sciences ; CAS Project of the China-Pakistan Joint Research Center on Earth Sciences ; CAS Project of the China-Pakistan Joint Research Center on Earth Sciences ; CAS Project of the China-Pakistan Joint Research Center on Earth Sciences ; 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 ; Key Research Program of Frontier Sciences of CAS ; Key Research Program of Frontier Sciences of CAS ; Key Research Program of Frontier Sciences of CAS ; Key Research Program of Frontier Sciences of CAS ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences (CAS) ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences (CAS) ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences (CAS) ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences (CAS) ; CAS Project of the China-Pakistan Joint Research Center on Earth Sciences ; CAS Project of the China-Pakistan Joint Research Center on Earth Sciences ; CAS Project of the China-Pakistan Joint Research Center on Earth Sciences ; CAS Project of the China-Pakistan Joint Research Center on Earth Sciences ; 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 ; Key Research Program of Frontier Sciences of CAS ; Key Research Program of Frontier Sciences of CAS ; Key Research Program of Frontier Sciences of CAS ; Key Research Program of Frontier Sciences of CAS ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences (CAS) ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences (CAS) ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences (CAS) ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences (CAS) ; CAS Project of the China-Pakistan Joint Research Center on Earth Sciences ; CAS Project of the China-Pakistan Joint Research Center on Earth Sciences ; CAS Project of the China-Pakistan Joint Research Center on Earth Sciences ; CAS Project of the China-Pakistan Joint Research Center on Earth Sciences
源URL[http://ir.iggcas.ac.cn/handle/132A11/100088]  
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Ao, Songjian; Mao, Qigui; Xiao, Wenjiao
作者单位1.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
2.Beijing Inst Geol Mineral Resources, Beijing 100012, Peoples R China
3.Univ Leicester, Dept Geol, Leicester LEI 7RH, Leics, England
4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
5.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing, Peoples R China
6.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Xinjiang Res Ctr Mineral Resources, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Ao, Songjian,Mao, Qigui,Windley, Brian F.,et al. The youngest matrix of 234 Ma of the Kanguer accretionary melange containing blocks of N-MORB basalts: constraints on the northward subduction of the Paleo-Asian Kanguer Ocean in the Eastern Tianshan of the Southern Altaids[J]. INTERNATIONAL JOURNAL OF EARTH SCIENCES,2021:18.
APA Ao, Songjian.,Mao, Qigui.,Windley, Brian F..,Song, Dongfang.,Zhang, Zhiyong.,...&Xiao, Wenjiao.(2021).The youngest matrix of 234 Ma of the Kanguer accretionary melange containing blocks of N-MORB basalts: constraints on the northward subduction of the Paleo-Asian Kanguer Ocean in the Eastern Tianshan of the Southern Altaids.INTERNATIONAL JOURNAL OF EARTH SCIENCES,18.
MLA Ao, Songjian,et al."The youngest matrix of 234 Ma of the Kanguer accretionary melange containing blocks of N-MORB basalts: constraints on the northward subduction of the Paleo-Asian Kanguer Ocean in the Eastern Tianshan of the Southern Altaids".INTERNATIONAL JOURNAL OF EARTH SCIENCES (2021):18.

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来源：地质与地球物理研究所

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