气候变化领域集成服务门户(CCPortal): Late Neogene magnetostratigraphy in the western Qaidam Basin (NE Tibetan Plateau) and its constraints on active tectonic uplift and progressive evolution of growth strata

CCPortal

DOI	10.1016/j.tecto.2013.04.010
	Late Neogene magnetostratigraphy in the western Qaidam Basin (NE Tibetan Plateau) and its constraints on active tectonic uplift and progressive evolution of growth strata
	Zhang, Weilin; Fang, Xiaomin; Song, Chunhui; Appel, Erwin; Yan, Maodu; Wang, Yadong
通讯作者	Zhang, WL (通讯作者)
发表日期	2013
ISSN	0040-1951
EISSN	1879-3266
起始页码	107
结束页码	116
卷号	599
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	ALTYN-TAGH FAULT RESOLUTION MAGNETO STRATIGRAPHY CENOZOIC DEFORMATION SECTION RESTORATION QINGHAI PROVINCE NORTHERN TIBET HEXI CORRIDOR NW CHINA HISTORY EASTERN
英文关键词	Magnetostratigraphy; Neogene; Growth strata; Qaidam Basin; NE Tibetan Plateau
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000321231800008
来源期刊	TECTONOPHYSICS
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/258196
推荐引用方式 GB/T 7714	Zhang, Weilin,Fang, Xiaomin,Song, Chunhui,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]. 中国科学院青藏高原研究所,2013,599.
APA	Zhang, Weilin,Fang, Xiaomin,Song, Chunhui,Appel, Erwin,Yan, Maodu,&Wang, Yadong.(2013).Late Neogene magnetostratigraphy in the western Qaidam Basin (NE Tibetan Plateau) and its constraints on active tectonic uplift and progressive evolution of growth strata.TECTONOPHYSICS,599.
MLA	Zhang, Weilin,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".TECTONOPHYSICS 599(2013).