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Detrital zircon age spectra of the Gurvan Sayhan accretionary complex in South Mongolia: Constraints on the Late Paleozoic evolution of the southern Central Asian Orogenic Belt

文献类型：期刊论文

作者Yang, Shunhu1,2; Miao, Laicheng1,2; Zhang, Fochin1,2; Zhu, Mingshuai1,2; Zhou, Yao3; Baatar, Munkhtsengel4; Anaad, Chimedtseren4
刊名JOURNAL OF ASIAN EARTH SCIENCES
出版日期2019-05-15
卷号175页码:213-229
关键词Central Asian Orogenic Belt Detrital zircon age Gurvan Sayhan accretionary complex Southern Mongolia Provenance analysis
ISSN号1367-9120
DOI10.1016/j.jseaes.2018.07.041
英文摘要The southern Central Asian Orogenic Belt (CAOB) in South Mongolia consists of continental fragments sutured together by Paleozoic arc magmatism generated by the closing of the Paleo-Asian Ocean (PAO). Controversy persists regarding the timing and position of the final amalgamation of the Altai and Tianshan orogenic belts. This paper presents zircon U-Pb data of the Gurvan Sayhan accretionary complex, as well as the overlying sedimentary sequence, and a granite pluton intruding the complex to provide new insights into the Late Paleozoic evolution of South Mongolia. The detrital zircon grains from the Gurvan Sayhan accretionary complex yielded age spectra with predominant peaks at ca. 331 Ma, subdominant peaks at ca. 381, and 500 Ma, indistinct Precambrian peaks at ca. 848 Ma and the youngest group of 318 Ma. The Paleozoic zircon grains are interpreted to be derived from adjacent arc systems formed by the subduction of the PAO, whereas those with the Precambrian ages were possibly from the nearby Hangay and South Gobi microcontinent blocks. The proportion of Precambrian detrital zircon grains in the complex decreases with time, likely suggesting a change in the paleogeography during sedimentation of the complex. Detrital zircon grains from the overlying stratum produced an age spectrum characterized by containing the youngest peak at ca. 293 Ma, although older peaks at ca. 340 Ma and 466 Ma are also present. The granite pluton intruding the accretionary complex has an emplacement age of 292.9 +/- 1.3 Ma, similar with the youngest detrital zircon age peak from the overlying stratum, which is interpreted from the post-collisional magmatic rocks. Therefore, our results demonstrate that the final closure of the PAO in southern Mongolia was Late Carboniferous-Early Permian (318-293 Ma), and the Gurvan Sayhan accretionary complex represents the suture zone of the Altai and Tianshan orogenic belts.
WOS关键词U-PB AGE ; ARC-CONTINENT COLLISION ; TECTONIC EVOLUTION ; TRACE-ELEMENT ; GEOCHRONOLOGICAL CONSTRAINTS ; CENOZOIC TECTONICS ; SEDIMENTARY BASIN ; VOLCANIC-ROCKS ; CRUSTAL GROWTH ; HF ISOTOPES
资助项目Key Research Program of the Chinese Academy of Sciences[XDBP11] ; Chinese Academy of Sciences[GJHZ1805] ; Natural Science Foundation of China[41702217] ; Natural Science Foundation of China[41502217] ; Natural Science Foundation of China[41772230] ; Ministry of Science and Technology of China[2012FY120100]
WOS研究方向Geology
语种英语
WOS记录号WOS:000464298500017
出版者PERGAMON-ELSEVIER SCIENCE LTD
资助机构Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/91309]  
专题地质与地球物理研究所_中国科学院矿产资源研究重点实验室
通讯作者Yang, Shunhu
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China
3.Jiangxi Bur Explorat & Dev Geol & Minerals, South Jiangxi Geol Surveying Team, Ganzhou 341000, Peoples R China
4.Mongolian Univ Sci & Technol, Ulaanbaatar 120646, Mongol Peo Rep
推荐引用方式
GB/T 7714		 Yang, Shunhu,Miao, Laicheng,Zhang, Fochin,et al. Detrital zircon age spectra of the Gurvan Sayhan accretionary complex in South Mongolia: Constraints on the Late Paleozoic evolution of the southern Central Asian Orogenic Belt[J]. JOURNAL OF ASIAN EARTH SCIENCES,2019,175:213-229.
APA Yang, Shunhu.,Miao, Laicheng.,Zhang, Fochin.,Zhu, Mingshuai.,Zhou, Yao.,...&Anaad, Chimedtseren.(2019).Detrital zircon age spectra of the Gurvan Sayhan accretionary complex in South Mongolia: Constraints on the Late Paleozoic evolution of the southern Central Asian Orogenic Belt.JOURNAL OF ASIAN EARTH SCIENCES,175,213-229.
MLA Yang, Shunhu,et al."Detrital zircon age spectra of the Gurvan Sayhan accretionary complex in South Mongolia: Constraints on the Late Paleozoic evolution of the southern Central Asian Orogenic Belt".JOURNAL OF ASIAN EARTH SCIENCES 175(2019):213-229.

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来源：地质与地球物理研究所

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