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Crustal nature and origin of the Russian Altai: Implications for the continental evolution and growth of the Central Asian Orogenic Belt (CAOB)

文献类型：期刊论文

作者Cai, Keda1; Sun, Min2; Buslov, M. M.3,4; Jahn, Bor-ming5; Xiao, Wenjiao1; Long, Xiaoping6; Chen, Huayong7; Wan, Bo8; Chen, Ming2; Rubanova, E. S.3,4
刊名TECTONOPHYSICS
出版日期2016-04-02
卷号674页码:182-194
关键词Central Asian Orogenic Belt Subduction-accretion complex Altai-Mongolian terrane Accretionary orogenesis Continent crustal growth
DOI10.1016/j.tecto.2016.02.026
文献子类Article
英文摘要The Central Asian Orogenic Belt is a gigantic tectonic collage of numerous accreted terranes. However, its geodynamic evolution has been hotly debated primarily due to incomplete knowledge on the nature of these enigmatic terranes. This work presents new detrital zircon U-Pb and Hf isotopic data to constrain the crustal nature and origin of the Russian Altai, a critical segment of Altai-Mongolian terrane. The youngest zircon Pb-206/U-238 ages of 470 Ma constrain that the Terekta Formation, previously envisaged as Precambrian basement, was actually deposited after the Middle Ordovician. As for the three more sedimentary sequences above the Terekta Formation, they have youngest zircon Pb-206/U-238 ages of 425 Ma, 440 Ma and 380 Ma, respectively, indicating their depositions likely in the Late Silurian to Devonian. From all analyses, it is noted that many zircon U-Pb ages cluster at ca. 520 Ma and ca. 800 Ma, and these zircons display oscillatory zoning and have subhedral to euhedral morphology, which, collectively, suggests that adjacent Neoproterozoic to Paleozoic igneous rocks were possibly dominant in the sedimentary provenance. Additionally, a few rounded Archean to Mesoproterozoic zircon grains are characterized by complex texture, which are interpreted as recycling materials probably derived from the Tuva-Mongolian microcontinent. Precambrian rocks have not been identified in the Russian Altai, Chinese Altai and Mongolian Altai so far, therefore, Precambrian basement may not exist in the Altai-Mongolian terrane, but this terrane probably represents a large subduction-accretion complex built on the margin of the Tuva-Mongolian microcontinent in the Early Paleozoic. Multiple episodes of ridge-trench interaction may have caused inputs of mantle-derived magmas to trigger partial melting of the newly accreted crustal materials, which contributed to the accretionary complex. During accretionary orogenesis of the CAOB, formation of such subduction-accretion complex is likely ubiquitous, indicating continental crust growth by both lateral accumulation and vertical basaltic injection. (C) 2016 Elsevier B.V. All rights reserved.
WOS关键词ZIRCON U-PB ; NORTH CHINA CRATON ; EARLY PALEOZOIC SEDIMENTS ; NW CHINA ; TECTONIC EVOLUTION ; GORNY-ALTAI ; GEOCHRONOLOGICAL EVIDENCE ; ACCRETIONARY OROGENESIS ; SIBERIAN CRATON ; KUZNETSK-ALATAU
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000374624200013
资助机构Major Basic Research Project of the Ministry of Science and Technology of China(2014CB448000 ; Major Basic Research Project of the Ministry of Science and Technology of China(2014CB448000 ; Xinjiang Outstanding Youth Scientific grant(2013711003) ; Xinjiang Outstanding Youth Scientific grant(2013711003) ; Hong Kong Research Grant Council(HKU704712P ; Hong Kong Research Grant Council(HKU704712P ; National Science Foundation of China(41273048) ; National Science Foundation of China(41273048) ; NSC-Taiwan (MOST-Taiwan)(NSC100-2923-M-002-010 ; NSC-Taiwan (MOST-Taiwan)(NSC100-2923-M-002-010 ; China Government under the 1000 Talent Plan ; China Government under the 1000 Talent Plan ; Hundred Talent Program of Xinjiang Government ; Hundred Talent Program of Xinjiang Government ; 2014CB440802) ; 2014CB440802) ; 704313P) ; 704313P) ; NSC101-2116-M-002-003 ; NSC101-2116-M-002-003 ; NSC102-2116-M-002-031 ; NSC102-2116-M-002-031 ; MOST104-2923-M-002-005) ; MOST104-2923-M-002-005) ; Major Basic Research Project of the Ministry of Science and Technology of China(2014CB448000 ; Major Basic Research Project of the Ministry of Science and Technology of China(2014CB448000 ; Xinjiang Outstanding Youth Scientific grant(2013711003) ; Xinjiang Outstanding Youth Scientific grant(2013711003) ; Hong Kong Research Grant Council(HKU704712P ; Hong Kong Research Grant Council(HKU704712P ; National Science Foundation of China(41273048) ; National Science Foundation of China(41273048) ; NSC-Taiwan (MOST-Taiwan)(NSC100-2923-M-002-010 ; NSC-Taiwan (MOST-Taiwan)(NSC100-2923-M-002-010 ; China Government under the 1000 Talent Plan ; China Government under the 1000 Talent Plan ; Hundred Talent Program of Xinjiang Government ; Hundred Talent Program of Xinjiang Government ; 2014CB440802) ; 2014CB440802) ; 704313P) ; 704313P) ; NSC101-2116-M-002-003 ; NSC101-2116-M-002-003 ; NSC102-2116-M-002-031 ; NSC102-2116-M-002-031 ; MOST104-2923-M-002-005) ; MOST104-2923-M-002-005)
源URL[http://ir.iggcas.ac.cn/handle/132A11/53494]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
作者单位1.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Xinjiang Res Ctr Mineral Resources, Beijing South Rd, Urumqi 830011, Peoples R China
2.Univ Hong Kong, Dept Earth Sci, Pokfulam Rd, Hong Kong, Hong Kong, Peoples R China
3.Russian Acad Sci, Siberian Branch, Inst Geol & Mineral, 3 Prosp Akad, Novosibirsk 630090, Russia
4.Novosibirsk State Univ, Pirogova St 2, Novosibirsk 630090, Russia
5.Natl Taiwan Univ, Dept Geosci, Taipei 106, Taiwan
6.NW Univ Xian, State Key Lab Continental Dynam, Dept Geol, Northern Taibai Str 229, Xian 710069, Peoples R China
7.Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Isotope Geochronol & Geochem, Guangzhou 510640, Guangdong, Peoples R China
8.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Cai, Keda,Sun, Min,Buslov, M. M.,et al. Crustal nature and origin of the Russian Altai: Implications for the continental evolution and growth of the Central Asian Orogenic Belt (CAOB)[J]. TECTONOPHYSICS,2016,674:182-194.
APA Cai, Keda.,Sun, Min.,Buslov, M. M..,Jahn, Bor-ming.,Xiao, Wenjiao.,...&Voytishek, E. E..(2016).Crustal nature and origin of the Russian Altai: Implications for the continental evolution and growth of the Central Asian Orogenic Belt (CAOB).TECTONOPHYSICS,674,182-194.
MLA Cai, Keda,et al."Crustal nature and origin of the Russian Altai: Implications for the continental evolution and growth of the Central Asian Orogenic Belt (CAOB)".TECTONOPHYSICS 674(2016):182-194.

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来源：地质与地球物理研究所

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