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题名: Late Neogene magnetostratigraphy in the western Qaidam Basin (NE Tibetan Plateau) and its constraints on active tectonic uplift and progressive evolution of growth strata
作者: Zhang, WL; Fang, XM; Song, CH(宋春晖); Appel, E; Yan, MD; Wang, YD
收录类别: SCIE ; EI
出版日期: 2013-06-25
刊名: TECTONOPHYSICS
卷号: 599, 页码:107-116
出版者: ELSEVIER
出版地: AMSTERDAM
英文摘要: The Qaidam Basin as the largest intermontane basin of the NE Tibetan Plateau is the ideal place to provide constraints on depositional and tectonic patters. To determine its tectonic deformation history and progressive evolution of growth strata we conducted paleomagnetic study on the late-Neogene stratigraphic section in the western Qaidam Basin. A magnetostratigraphic study of the well exposed 805 m Qigequan section at the Qigequan anticline in the western Qaidam Basin reveals twelve pairs of normal and reversed polarity zones which can be readily correlated with chrons C1n-3Ar of the Geomagnetic Polarity Time Scale (GPTS). From this correlation we can conclude that the Shizigou and the Qigequan formations were formed at >6.9 Ma-2.5 Ma and 2.5-0.4 Ma, respectively. Accumulation rates determined from our chronology, together with the occurrence of unconformities suggest four phases of tectonic uplift which began at about 3.6 Ma, 2.5 Ma, 1.1 Ma and 0.8 Ma. The results also suggest that offlap growth strata according to the limb rotation model on the anticlinorium started to occur at similar to 8.2 Ma. They progressively become younger from the frontal region of the Altyn Tagh Mts. (similar to 8.2 Ma) to the southwestern basin (similar to 2.5 Ma) and to further east of the Qaidam Basin (<2.5 Ma), caused by fault-propagation-folding in the Qaidam Basin, rapid uplift and fast exhumation of the NE Tibetan Plateau at those times. (C) 2013 Elsevier B.V. All rights reserved.
关键词: Magnetostratigraphy ; Neogene ; Growth strata ; Qaidam Basin ; NE Tibetan Plateau
作者部门: [Zhang, Weilin ; Fang, Xiaomin ; Yan, Maodu] Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Continental Collis & Plateau Uplift, Beijing 100101, Peoples R China ; [Song, Chunhui] Lanzhou Univ, Key Lab Western Chinas Environm Syst, Minist Educ China, Lanzhou 730000, Gansu, Peoples R China ; [Song, Chunhui] Lanzhou Univ, Coll Resources & Environm, Lanzhou 730000, Gansu, Peoples R China ; [Zhang, Weilin ; Appel, Erwin] Univ Tubingen, Fachbereich Geowissensch, D-72076 Tubingen, Germany ; [Wang, Yadong] Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Lanzhou 730000, Peoples R China
通讯作者: Zhang, WL (reprint author), Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Continental Collis & Plateau Uplift, Beijing 100101, Peoples R China.
学科分类: Geochemistry & Geophysics
文章类型: Article
所属项目编号: (973) National Basic Research Program of China [2013CB956400, 2011CB403000] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDB03020400] ; NSFC [41021001, 40920114001, 41172032, 40702006] ; German Research Foundation within the Priority Programme 1372 "TiP"
所属项目名称: 国家自然科学基金项目 ; 国家重点基础研究发展计划以及国家重大科学研究计划(973计划) ; 德国科学基金会项目
项目资助者: NSFC ; MOST ; DFG
语种: 英语
DOI: 10.1016/j.tecto.2013.04.010
ISSN号: 0040-1951
WOS记录号: WOS:000321231800008
EI记录号: 20132416412841
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/120298
Appears in Collections:资源环境学院_期刊论文

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Recommended Citation:
Zhang, WL,Fang, XM,Song, CH,et al. Late Neogene magnetostratigraphy in the western Qaidam Basin (NE Tibetan Plateau) and its constraints on active tectonic uplift and progressive evolution of growth strata[J]. TECTONOPHYSICS,2013,599:107-116.
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