气候变化领域集成服务门户(CCPortal): Cenozoic uplift of the Tibetan Plateau: Evidence from the tectonic-sedimentary evolution of the western Qaidam Basin

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DOI	10.1016/j.gsf.2011.11.005
	Cenozoic uplift of the Tibetan Plateau: Evidence from the tectonic-sedimentary evolution of the western Qaidam Basin
	Wang, Yadong; Zheng, Jianjing; Zhang, Weilin; Li, Shiyuan; Liu, Xingwang; Yang, Xin; Liu, Yuhu
通讯作者	Wang, YD (通讯作者)
发表日期	2012
ISSN	1674-9871
起始页码	175
结束页码	187
卷号	3 期号:2
英文摘要	Geologists agree that the collision of the Indian and Asian plates caused uplift of the Tibet Plateau. However, controversy still exists regarding the modes and mechanisms of the Tibetan Plateau uplift. Geology has recorded this uplift well in the Qaidam Basin. This paper analyzes the tectonic and sedimentary evolution of the western Qaidam Basin using sub-surface seismic and drill data. The Cenozoic intensity and history of deformation in the Qaidam Basin have been reconstructed based on the tectonic developments, faults growth index, sedimentary facies variations, and the migration of the depositional depressions. The changes in the sedimentary facies show that lakes in the western Qaidam Basin had gone from inflow to still water deposition to withdrawal. Tectonic movements controlled deposition in various depressions, and the depressions gradually shifted southeastward. In addition, the morphology of the surface structures in the western Qaidam Basin shows that the Cenozoic tectonic movements controlled the evolution of the Basin and divided it into (a) the southern fault terrace zone, (b) a central Yingxiongling orogenic belt, and (c) the northern fold-thrust belt; divided by the XI fault (Youshi fault) and Youbei fault, respectively. The field data indicate that the western Qaidam Basin formed in a Cenozoic compressive tectonic environment caused by the India-Asia plate collision. Further, the Basin experienced two phases of intensive tectonic deformation. The first phase occurred during the Middle Eocene-Early Miocene (Xia Ganchaigou Fm. and Shang Ganchaigou Fm., 43.8-22 Ma), and peaked in the Early Oligocene (Upper Xia Ganchaigou Fm., 31.5 Ma). The second phase occurred between the Middle Miocene and the Present (Shang Youshashan Fm. and Qigequan Fm., 14.9-0 Ma), and was stronger than the first phase. The tectonic-sedimentary evolution and the orientation of surface structures in the western Qaidam Basin resulted from the Tibetan Plateau uplift, and recorded the periodic northward growth of the Plateau. Recognizing this early tectonic-sedimentary evolution supports the previous conclusion that northern Tibet responded to the collision between India and Asia shortly after its initiation. However, the current results reveal that northern Tibet also experienced another phase of uplift during the late Neogene. The effects of these two stages of tectonic activity combined to produce the current Tibetan Plateau. (C) 2011, China University of Geosciences (Beijing) and Peking University. Production and hosting by Elsevier B.V. All rights reserved.
关键词	ALTYN-TAGH FAULT SOUTHERN TIBET DEFORMATION HISTORY SECTION RESTORATION NORTHERN MARGIN CROSS-SECTIONS NW CHINA EASTERN INDIA ASIA
英文关键词	Western Qaidam Basin; Sedimentary facies; Depositional depression; Tectonic evolution; Tibetan Plateau uplift
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000414284600006
来源期刊	GEOSCIENCE FRONTIERS
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258049
推荐引用方式 GB/T 7714	Wang, Yadong,Zheng, Jianjing,Zhang, Weilin,et al. Cenozoic uplift of the Tibetan Plateau: Evidence from the tectonic-sedimentary evolution of the western Qaidam Basin[J]. 中国科学院青藏高原研究所,2012,3(2).
APA	Wang, Yadong.,Zheng, Jianjing.,Zhang, Weilin.,Li, Shiyuan.,Liu, Xingwang.,...&Liu, Yuhu.(2012).Cenozoic uplift of the Tibetan Plateau: Evidence from the tectonic-sedimentary evolution of the western Qaidam Basin.GEOSCIENCE FRONTIERS,3(2).
MLA	Wang, Yadong,et al."Cenozoic uplift of the Tibetan Plateau: Evidence from the tectonic-sedimentary evolution of the western Qaidam Basin".GEOSCIENCE FRONTIERS 3.2(2012).