Cenozoic depositional sequences in the piedmont of the west Kunlun and;their paleogeographic and tectonic implications

doi:10.1016/S1367-9120(02)00073-1

	Cenozoic depositional sequences in the piedmont of the west Kunlun and;their paleogeographic and tectonic implications
	Jin, XC; Wang, J; Chen, BW; Ren, LD
刊名	JOURNAL OF ASIAN EARTH SCIENCES
	2003
卷号	21 期号:7 页码:755-765
关键词	West Kunlun Tarim basin Cenozoic Molasse sedimentation uplift
ISSN号	1367-9120
DOI	10.1016/S1367-9120(02)00073-1
英文摘要	The West Kunlun forms the northwestern margin of the Qinghai-Tibet Plateau. Well developed Cenozoic depositional sequences in the piedmont along the margins of the Tarim basin record changes in sedimentary environment and the uplift of the West Kunlun during the Cenozoic.;During latest Cretaceous to Oligocene deposition in the west Kunlun occurred in a marine environment (the Tarim Bay). During the Paleogene gypsum beds, bivalve shell limestones and variegated clastics were deposited. Rapid sedimentation during the Late Miocene resulted in the deposition of molasse sediments 2000-3000 m thick, indicating a relatively high depositional rate. The Upper Miocene sequences show a coarsening-up tendency, indicating a rapid and accelerated uplift of the West Kunlun from Late Miocene to Early Pleistocene times. Molasse deposition was interrupted in the Early Pleistocene by a tectonic pulse, which resulted in tilting of the molasse and underlying sediments at high-angle towards the Tarim Basin. Undeformed Middle to Late Pleistocene coarse fluvial and pluvial deposits overlie the steeply dipping molasse and older rocks unconformably, and represent the resumption of rapid deposition. A continual high rate of uplift during the Holocene is presumed on the basis of an incised drainage system that flows from West Kunlun into the Tarim Basin and cuts Middle to Late Pleistocene gravels and older sediments to a depth from 50 m to more than 100 m, although climatic changes may also have played a part. (C) 2003 Elsevier Science Ltd. All rights reserved.
学科主题	地层学与地史学
WOS关键词	TARIM ; MOUNTAINS ; BASIN ; TIBET
WOS研究方向	Geology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000182671300005
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/37590]
专题	中国地质科学院地质研究所
作者单位	Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China.
推荐引用方式 GB/T 7714	Jin, XC,Wang, J,Chen, BW,et al. Cenozoic depositional sequences in the piedmont of the west Kunlun and;their paleogeographic and tectonic implications[J]. JOURNAL OF ASIAN EARTH SCIENCES,2003,21(7):755-765.
APA	Jin, XC,Wang, J,Chen, BW,&Ren, LD.(2003).Cenozoic depositional sequences in the piedmont of the west Kunlun and;their paleogeographic and tectonic implications.JOURNAL OF ASIAN EARTH SCIENCES,21(7),755-765.
MLA	Jin, XC,et al."Cenozoic depositional sequences in the piedmont of the west Kunlun and;their paleogeographic and tectonic implications".JOURNAL OF ASIAN EARTH SCIENCES 21.7(2003):755-765.