Cenozoic architecture and structural development of the eastern Qaidam basin

doi:10.6038/cjg20161218

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 岩石圈演化国家重点实验室

	Cenozoic architecture and structural development of the eastern Qaidam basin
	Du, Zhong-Ming 1,2; Fan, Long-Gang 1,2; Wu, Guo-Li 1,2; Wei, Hong-Hong 3; Meng, Qing-Ren 1,2
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2016-12-01
卷号	59 期号:12 页码:4560-4569
关键词	Qaidam basin Cenozoic Seismic profiles Sedimentary basin Tibetan plateau
DOI	10.6038/cjg20161218
文献子类	Article
英文摘要	This study aims to reveal Cenozoic architecture and structural development of the eastern Qaidam basin. Seismic profiles show that Cenozoic strata become thinner and pinch out toward the northern and southern edges of the basin, and the northern basin has been greatly modified by the Oulongbulukshan and Aimunikshan uplifts. Based on the analysis of lateral variations of Cenozoic strata and stratigraphic sections, it is demonstrated that the Oubei fault initiated in the Late Miocene, leading to rising of the Oulongbulukshan uplift and formation of the Delingha depression. The Aibei fault became active in the Pliocene, and north-directed thrusting of both the Aibei and Oubei faults resulted in further subsidence of the Delingha depression and deposition of the Shizigou Formation up to 2600 m thick. The Quaternary witnessed large-scale thrusting of the Ai'nan fault, which not only caused uplifting and southerly displacement of the Oulongbuluk mountain and Aimunik mountain on the north but also the generation of the Hobuxun depression on the south. The Hobuxun depression then became the depocenter of the eastern Qaidam basin. Previous basin models, such as foreland basin or piggyback basin models, apparently failed to interpret both the Cenozoic architecture and structural development of the eastern Qaidam basin. It is proposed that the eastern Qaidam basin was formed as a result of crustal folding related to strong horizontal compression, i.e., the eastern Qaidam basin was a crustal-scale synclinal basin. The synclinal basin model can well account for the thinning of strata toward basin margins and localization of depocenters in the middle of the basin during the Cenozoic. Reconstruction of structural evolution of the eastern Qaidam basin will help understand lateral growth of the northeastern Tibetan plateau.
WOS关键词	APATITE FISSION-TRACK ; NORTHEASTERN TIBETAN PLATEAU ; QILIAN SHAN ; TECTONIC EVOLUTION ; HEXI CORRIDOR ; CHINA ; QINGHAI ; RECONSTRUCTION ; STRATIGRAPHY ; CONSTRAINTS
WOS研究方向	Geochemistry & Geophysics
语种	英语
WOS记录号	WOS:000389683800018
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/53199]
专题	地质与地球物理研究所_岩石圈演化国家重点实验室
作者单位	1.Chinese Acad Sci, State Key Lab Lithospher Evolut, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Tibetan Plateau, Key Lab Continental Collis & Plateau Uplift, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Du, Zhong-Ming,Fan, Long-Gang,Wu, Guo-Li,et al. Cenozoic architecture and structural development of the eastern Qaidam basin[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2016,59(12):4560-4569.
APA	Du, Zhong-Ming,Fan, Long-Gang,Wu, Guo-Li,Wei, Hong-Hong,&Meng, Qing-Ren.(2016).Cenozoic architecture and structural development of the eastern Qaidam basin.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,59(12),4560-4569.
MLA	Du, Zhong-Ming,et al."Cenozoic architecture and structural development of the eastern Qaidam basin".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 59.12(2016):4560-4569.