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学科主题: 地球科学::地质学
题名: Late Triassic paleogeographic reconstruction along the Neo-Tethyan Ocean margins, southern Tibet
作者: Cai, FL (Cai, Fulong)1, 2; Ding, L (Ding, Lin)1, 3; Laskowski, AK (Laskowski, Andrew K.)2; Kapp, P (Kapp, Paul)2; Wang, HQ (Wang, Houqi)1; Xu, Q (Xu, Qiang)1, 3; Zhang, LY (Zhang, Liyun)1, 3
通讯作者: Cai, FL
刊名: EARTH AND PLANETARY SCIENCE LETTERS
发表日期: 2016
DOI: 10.1016/j.epsl.2015.12.027
卷: 435, 期:0, 页:105-114
收录类别: SCI
合作性质: 国际
文章类型: Article
英文摘要: Sandstone petrographic and U-Pb detrital zircon analyses of Upper Triassic sedimentary rocks from the northern margin of India (Tethyan Himalaya Sequence) and southern margin of Eurasia (Lhasa terrane) provide new constraints on the Mesozoic paleogeography of Neo-Tethyan Ocean basins. The Upper Triassic Nieru Formation of the Tethyan Himalaya Sequence (THS) near Lazi city (similar to 29 degrees N, 87.5 degrees E) is dominated by Indian-affinity, Precambrian detrital zircons, which are typical of the majority of the THS. However, the Upper Triassic Langjiexue Formation of the THS exposed to the east (at 90-93 degrees E longitude) includes significant populations of Permian to Early Jurassic (291-184 Ma) detrital zircons for which there is no known Indian source. In addition, the Upper Triassic Nieru Formation near Kangma town (similar to 28.5 degrees N, 90 degrees E), located similar to 200 km to the southeast of Lazi city, yielded detrital zircon age spectra that are similar to those of Langjiexue Formation. Based on detrital zircon age spectra comparisons, we propose that both the Langjiexue and Nieru formations were derived from continental crustal fragments that were adjacent to the northwestern margin of Australia. Furthermore, we suggest that these THS units, and age-equivalent strata in Northwest Australia, West Sulawesi, Timor and West Papua, comprised a Late Triassic submarine fan along the northern Australian shelf. The Upper Triassic Mailonggang Formation in the southern Lhasa terrane (35 km northeast of Lhasa city, similar to 30 degrees N, 91.5 degrees E) is dominated by Permian detrital zircons, which were likely derived from proximal Lhasa terrane sources. The Mailonggang Formation differs from all age-equivalent strata in the Tethyan Himalaya; therefore we interpret that it was separated from Greater India by the Neo-Tethyan Ocean. (C) 2015 Elsevier B.V. All rights reserved.
语种: 英语
WOS记录号: WOS:000369213900012
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.itpcas.ac.cn/handle/131C11/7770
Appears in Collections:图书馆_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Continental Collis & Plateau Uplift, Beijing 100101, Peoples R China
2.Univ Arizona, Dept Geosci, Tucson, AZ 85721 USA
3.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China

Recommended Citation:
Cai, FL ,Ding, L ,Laskowski, AK ,et al. Late Triassic paleogeographic reconstruction along the Neo-Tethyan Ocean margins, southern Tibet[J]. EARTH AND PLANETARY SCIENCE LETTERS,2016,435(0):105-114.
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