Age and Provenance of Sumdo Formation in Central Gangdise, Tibetan Plateau: Detrital Zircon U-Pb Geochronological Evidence

被引：6
|
作者：
Xie C. [1 ]
Song Y. [1 ]
Wang M. [1 ]
Fan J. [1 ]
Zhang H. [2 ]
Hao Y. [1 ,3 ]
机构：
[1] College of Earth Sciences, Jilin University, Changchun
[2] School of Earth Sciences and Resources, China University of Geosciences, Beijing
[3] Key Laboratory of Mineral Resources Evaluation in Northeast Asia, Ministry of Natural Resources, Changchun
来源：
Diqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal of China University of Geosciences | 2019年 / 44卷 / 07期
关键词：
Detrital zircon; Gangdise; Geochronology; Late Carboniferous-Early Permian; Provenance; Sumdo Formation; Tibetan Plateau;
D O I：
10.3799/dqkx.2019.024
中图分类号：
学科分类号：
摘要：
The Sumdo Formation, which is widely developed in the central Gangdise, has been controversial in its stratigraphic age due to lack of fossil evidence, seriously restricting our understanding of structural evolution in the Sumdo area. In this paper, on the basis of detailed field geological investigation, LA-ICP-MS U-Pb dating was carried out on detrital zircons from metamorphic sandstones of Sumdo Formation. The minimum zircon age of detrital zircon in metamorphic sandstones is 316 Ma, the Late Carboniferous, representing the lower limit of the main depositional age of the Sumdo Formation. Provenance analysis indicates that the sedimentary detritus was sourced from the Lhasa terrane itself (South and North Lhasa terranes),and may be the sedimentary record of the initial ocean basin of Sumdo Paleo-Tethys Ocean. The determination of the age of the Sumdo Formation has further improved the Late Paleozoic stratigraphic system in this area and is of great significance to the study of lithofacies and paleogeography of the Late Carboniferous-Early Permian in the northern margin of the Gondwana. © 2019, Editorial Department of Earth Science. All right reserved.
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页码：2224 / 2233
页数：9
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