A newly defined, long-lived Paleozoic intra-oceanic arc in the South Tianshan (NW China): Implications for multiple accretionary tectonics in the southern Altaids
文献类型：期刊论文
| 作者 | Gao, Limin1,3 ; Xiao, Wenjiao1,3,4; Tan, Zhou3,4; Wang, Xinshui2; Guo, Yuhong3,4
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| 刊名 | GEOLOGICAL SOCIETY OF AMERICA BULLETIN
 |
| 出版日期 | 2023-03-01 |
| 卷号 | 135期号:3-4页码:767-786 |
| ISSN号 | 0016-7606 |
| DOI | 10.1130/B36355.1 |
| 英文摘要 | The South Tianshan Orogenic Belt marks the final assembly of the southern Altaids and the Karakum-Tarim Cratons. Integrated petrological, geochemical, and geochronological studies were carried out on the Akeyazi high-alumina basaltic lavas (HABs) and their host sandstones from the southern margin of the Central Tianshan Block. Given their relative high alumina contents (Al2O3 > 16 wt%) and geochemical similarity to basalts from modern arcs (e.g., Aleutian, Kamchatka, Izu, and Honshu arc), the Akeyazi basaltic lavas are classified as HABs. The Akeyazi HABs are distinguished by strong enrichment in large ion lithophile elements (LILE) and negative Nb-Ta anomalies. Furthermore, their mid-oceanic ridge basalt (MORB)-like Sr-Nd-Hf (Sr-87/Sr-86((i)) similar to 0.705766, epsilon Nd-(t) similar to+2.5, epsilon Hf-(t) similar to+9.5), along with arc-like trace element patterns, indicate a petrogenesis derived from a mantle wedge metasomatized by pelagic, sediment-derived melts (2%-5% melts mixed, as confirmed by melt modeling). Zircon U-Pb ages of Akeyazi HABs and associated arc-related gabbros suggest that they were mainly erupted during ca. 415 Ma. Moreover, host sandstones of Akeyazi HABs exhibit a unimodal distribution with a peak at 480-410 Ma in the detrital zircon spectrum, which is notably distinct from those of the Central Tianshan Block, South Tianshan Accretionary Complex, and North Tarim Craton, each of which is multimodal. The maximum depositional age (MDA) of the meta-sandstones is 351.0 +/- 4.3 Ma, with the weighted average of three oldest Paleozoic grains at 502 +/- 26 Ma. Collectively, our data, for the first time, discloses an intra-oceanic arc setting from ca. 502-351 Ma during the northward subduction of the South Tianshan Ocean, which further reveals the history of multiple episodes of accretion in the southern Altaids. |
| WOS关键词 | ZIRCON U-PB ; LARGE IGNEOUS PROVINCE ; OCEAN PLATE STRATIGRAPHY ; ND ISOTOPIC COMPOSITION ; HIGH-ALUMINA BASALTS ; ASIAN OROGENIC BELT ; TIEN-SHAN ; CONTINENTAL GROWTH ; EASTERN TIANSHAN ; VOLCANIC-ROCKS |
| 资助项目 | National Natural Science Foundation of China[41888101] ; National Natural Science Foundation of China[41822204] ; Science and Technology Major Project of Xinjiang Uygur Autonomous Region, China[2021A03001] ; National Key R and D Program of China[2017YFC0601206] ; "Light of West China" program of the Chinese Academy of Sciences (CAS)[2017-XBQNXZ-B-013] ; "Light of West China" program of the Chinese Academy of Sciences (CAS)[2018-XBYJRC-003] ; Project of China-Pakistan Joint Research Center on Earth Sciences, CAS[131551KYSB20200021] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| 出版者 | GEOLOGICAL SOC AMER, INC |
| WOS记录号 | WOS:001096648300004 |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; Science and Technology Major Project of Xinjiang Uygur Autonomous Region, China ; Science and Technology Major Project of Xinjiang Uygur Autonomous Region, China ; National Key R and D Program of China ; National Key R and D Program of China ; "Light of West China" program of the Chinese Academy of Sciences (CAS) ; "Light of West China" program of the Chinese Academy of Sciences (CAS) ; Project of China-Pakistan Joint Research Center on Earth Sciences, CAS ; Project of China-Pakistan Joint Research Center on Earth Sciences, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Science and Technology Major Project of Xinjiang Uygur Autonomous Region, China ; Science and Technology Major Project of Xinjiang Uygur Autonomous Region, China ; National Key R and D Program of China ; National Key R and D Program of China ; "Light of West China" program of the Chinese Academy of Sciences (CAS) ; "Light of West China" program of the Chinese Academy of Sciences (CAS) ; Project of China-Pakistan Joint Research Center on Earth Sciences, CAS ; Project of China-Pakistan Joint Research Center on Earth Sciences, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Science and Technology Major Project of Xinjiang Uygur Autonomous Region, China ; Science and Technology Major Project of Xinjiang Uygur Autonomous Region, China ; National Key R and D Program of China ; National Key R and D Program of China ; "Light of West China" program of the Chinese Academy of Sciences (CAS) ; "Light of West China" program of the Chinese Academy of Sciences (CAS) ; Project of China-Pakistan Joint Research Center on Earth Sciences, CAS ; Project of China-Pakistan Joint Research Center on Earth Sciences, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Science and Technology Major Project of Xinjiang Uygur Autonomous Region, China ; Science and Technology Major Project of Xinjiang Uygur Autonomous Region, China ; National Key R and D Program of China ; National Key R and D Program of China ; "Light of West China" program of the Chinese Academy of Sciences (CAS) ; "Light of West China" program of the Chinese Academy of Sciences (CAS) ; Project of China-Pakistan Joint Research Center on Earth Sciences, CAS ; Project of China-Pakistan Joint Research Center on Earth Sciences, CAS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/110650]  |
| 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 | Xiao, Wenjiao; Tan, Zhou |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.China Univ Geosci, Sch Earth Sci, State Key Lab Geol Processes & Mineral Resources, Wuhan 430074, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Mineral Resources Res Ctr, Urumqi 830011, Peoples R China |
| 推荐引用方式 GB/T 7714 | Gao, Limin,Xiao, Wenjiao,Tan, Zhou,et al. A newly defined, long-lived Paleozoic intra-oceanic arc in the South Tianshan (NW China): Implications for multiple accretionary tectonics in the southern Altaids[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2023,135(3-4):767-786. |
| APA | Gao, Limin,Xiao, Wenjiao,Tan, Zhou,Wang, Xinshui,&Guo, Yuhong.(2023).A newly defined, long-lived Paleozoic intra-oceanic arc in the South Tianshan (NW China): Implications for multiple accretionary tectonics in the southern Altaids.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,135(3-4),767-786. |
| MLA | Gao, Limin,et al."A newly defined, long-lived Paleozoic intra-oceanic arc in the South Tianshan (NW China): Implications for multiple accretionary tectonics in the southern Altaids".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 135.3-4(2023):767-786. |
入库方式： OAI收割
来源：地质与地球物理研究所
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