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Zircon ages of the Bayankhongor ophiolite melange and associated rocks: Time constraints on Neoproterozoic to Cambrian accretionary and collisional orogenesis in Central Mongolia

文献类型：期刊论文

作者Jian, Ping1; Kroener, Alfred1,2; Windley, Brian F.3; Shi, Yurao1; Zhang, Fuqin4; Miao, Laicheng4; Tomurhuu, Dondov5; Zhang, Wei1; Liu, Dunyi1
刊名PRECAMBRIAN RESEARCH
出版日期2010-02-01
卷号177期号:1-2页码:162-180
关键词Accretion-collision Central Asian Orogenic Belt Mongolia Ophiolite Syenite Porphyry Zircon
ISSN号0301-9268
DOI10.1016/j.precamres.2009.11.009
文献子类Article
英文摘要Central Mongolia is geologically characterized by close juxtaposition of an accreted oceanic terrane with an arc-microcontinent collision zone. We present new U-Pb zircon ages and geochemical data for the Bayankhongor ophiolite melange from the oceanic terrane and for a syenite porphyry pluton from the arc-microcontinent zone, providing critical constraints on the regional evolution in late Neoproterozoic to early Cambrian times. An anorthosite (655 +/- 4 Ma) associated with layered gabbro, a rodingite (metasomatized layered gabbro) (647 +/- 6 Ma), and a high-level isotropic amphibole gabbro (647 +/- 7 Ma) yielded the oldest zircon ages for the plutonic part of the ophiolite. A plagiogranite dike in the amphibole gabbro yielded an age of 636 +/- 6 Ma, which is the youngest date obtained for the ophiolitic rocks. We suggest that the long duration (ca. 20 Ma) for formation of this plutonic sequence characterizes the sea-floor spreading evolution, and the Nd-Sr isotopic composition (epsilon(Nd(t)) = +7.6 to +4.7: initial (87)Sr/(86)Sr ratio = 0.70279-0.70327) points to a mid-ocean-ridge origin. The syenite porphyry, dated at 523 2 Ma, records the terminal or post-collisional phase of orogeny. The Bayankhongor oceanic lithosphere experienced at least 92 Ma of drift between its formation and accretion. (C) 2009 Elsevier B.V. All rights reserved.
WOS关键词PHANEROZOIC CRUSTAL GROWTH ; PLATE-TECTONIC EVOLUTION ; ND ISOTOPIC EVIDENCE ; CONTINENTAL-CRUST ; SPREADING RIDGES ; U-PB ; OMAN OPHIOLITE ; OCEANIC-CRUST ; CENTRAL-ASIA ; SHOSHONITIC VOLCANISM
WOS研究方向Geology
语种英语
WOS记录号WOS:000274970200010
出版者ELSEVIER SCIENCE BV
资助机构National Natural Science Foundation of China(40234045 ; National Natural Science Foundation of China(40234045 ; 40672048) ; 40672048) ; National Natural Science Foundation of China(40234045 ; National Natural Science Foundation of China(40234045 ; 40672048) ; 40672048) ; National Natural Science Foundation of China(40234045 ; National Natural Science Foundation of China(40234045 ; 40672048) ; 40672048) ; National Natural Science Foundation of China(40234045 ; National Natural Science Foundation of China(40234045 ; 40672048) ; 40672048)
源URL[http://ir.iggcas.ac.cn/handle/132A11/72799]  
专题中国科学院地质与地球物理研究所
通讯作者Jian, Ping
作者单位1.Chinese Acad Geol Sci, Inst Geol, SHRIMP Ctr, Beijing 100037, Peoples R China
2.Johannes Gutenberg Univ Mainz, Inst Geowissensch, D-55099 Mainz, Germany
3.Univ Leicester, Dept Geol, Leicester LE1 7RH, Leics, England
4.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
5.Mongolian Acad Sci, Inst Geol & Mineral Resources, Ulaanbaatar 210351, Mongol Peo Rep
推荐引用方式
GB/T 7714		 Jian, Ping,Kroener, Alfred,Windley, Brian F.,et al. Zircon ages of the Bayankhongor ophiolite melange and associated rocks: Time constraints on Neoproterozoic to Cambrian accretionary and collisional orogenesis in Central Mongolia[J]. PRECAMBRIAN RESEARCH,2010,177(1-2):162-180.
APA Jian, Ping.,Kroener, Alfred.,Windley, Brian F..,Shi, Yurao.,Zhang, Fuqin.,...&Liu, Dunyi.(2010).Zircon ages of the Bayankhongor ophiolite melange and associated rocks: Time constraints on Neoproterozoic to Cambrian accretionary and collisional orogenesis in Central Mongolia.PRECAMBRIAN RESEARCH,177(1-2),162-180.
MLA Jian, Ping,et al."Zircon ages of the Bayankhongor ophiolite melange and associated rocks: Time constraints on Neoproterozoic to Cambrian accretionary and collisional orogenesis in Central Mongolia".PRECAMBRIAN RESEARCH 177.1-2(2010):162-180.

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来源：地质与地球物理研究所

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