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学科主题: 地球科学::地质学
题名: Neoproterozoic granitoids in the eastern Himalayan orogen and their tectonic implications
作者: Ding, HX (Ding, Huixia)1; Zhang, ZM (Zhang, Zeming)1, 2
通讯作者: Zhang, ZM
关键词: U-PB ZIRCON ; SOUTHERN TIBET ; BREAK-UP ; WESTERN MARGIN ; PAN-AFRICAN ; GEOCHEMICAL EVIDENCE ; CONTINENTAL ARC ; MAGMATIC EVENT ; INDIAN MARGIN ; YANGTZE BLOCK
刊名: PRECAMBRIAN RESEARCH
发表日期: 2016
DOI: 10.1016/j.precamres.2016.09.005
卷: 285, 期:0, 页:1-9
收录类别: SCI
合作性质: 国内
文章类型: Article
部门归属: 碰撞与隆升
英文摘要: The Precambrian component and evolutionary history of the Greater Himalayan Sequence (GHS), forming the core of the Himalayan orogen, remain a subject of debate. Here, we report new geochronological and petrochemical data of the Neoproterozoic granitoids that occur as the orthogneisses of the GHS in Cona area, the eastern Himalaya orogen. The zircon U-Pb dating results reveal that these granitoids have crystallization ages of Neoproterozoic of 817-838 Ma, and metamorphic ages of ca. 31 Ma. The petrochemical data show that the granitoids are medium to high-K, peraluminous granodiorite and granite, display geochemical affinities with volcanic arc granitoids. The zircon Hf isotopic compositions show that the granitoids were probably derived from the partial melting of Paleoproterozoic crustal materials. These data, combined with previous results, indicate that an extensive Neoproterozoic magmatic belt may have existed in the Himalayan orogen, and that the Neoproterozoic granitoids resulted from the Andean type orogeny that formed along the northwestern margin of Rodinia supercontinent, and experienced the Cenozoic high-grade metamorphism during the Himalayan orogeny. (C) 2016 Elsevier B.V. All rights reserved.
语种: 英语
WOS记录号: WOS:000386404500001
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.itpcas.ac.cn/handle/131C11/7579
Appears in Collections:图书馆_期刊论文

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作者单位: 1.Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China
2.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Continental Collis & Plateau Uplift, Beijing 100085, Peoples R China

Recommended Citation:
Ding, HX ,Zhang, ZM . Neoproterozoic granitoids in the eastern Himalayan orogen and their tectonic implications[J]. PRECAMBRIAN RESEARCH,2016,285(0):1-9.
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