Late quaternary downcutting rates of the Qianyou River from U/Th speleothem dates, Qinling mountains, China

doi:10.1016/j.yqres.2004.06.007

	Late quaternary downcutting rates of the Qianyou River from U/Th speleothem dates, Qinling mountains, China
	Fei, W ; Li, HC ; Zhu, RX ; Qin, FZ
刊名	QUATERNARY RESEARCH
	2004-09-01
卷号	62 期号:2 页码:194-200
关键词	Qianyou River Speleothem Qinling Mountains China
ISSN号	0033-5894
DOI	10.1016/j.yqres.2004.06.007
文献子类	Article
英文摘要	Dating deposits in eaves formed by rivers may yield insight into rates and processes of bedrock incision. Three cave passages at different levels have developed in the walls of the Qianyou River valley in the Qinling mountains, south of the city of Man, China. Twelve speleothem samples near the position of palaeowater tables in three cave passages are dated by the Th-230 dating method. The results show that the river cut down at the rate of 0.23 +/- 0.02 mm/yr from 358,000 +/- 38,000 to 247,000 +/- 28,000 yr ago, 0.19 +/- 0.03 mm/yr from 247,000 +/- 28,000 to 118,000 +/- 19,000 yr ago, and 0.51 +/- 0.08 mm/yr from 118,000 +/- 19,000 yr ago until today. These fall very close to the glacial-interglacial transition following marine oxygen isotope stages 10, 8, and 6, respectively. The increase in downcutting rates during the interglacial period is consistent with warm, wet weather, increasing rates of erosion. This may lead us toward an underlying mechanism for modulating incision that is not in a direct response to the presence of headwater glaciers. (C) 2004 University of Washington. All rights reserved.
WOS关键词	LANDSCAPE EVOLUTION ; COSMOGENIC AL-26 ; CAVE SEDIMENTS ; MAMMOTH CAVE ; BE-10 ; INCISION ; SOUTHERN ; KENTUCKY ; UPLIFT ; DECAY
WOS研究方向	Physical Geography ; Geology
语种	英语
出版者	ACADEMIC PRESS INC ELSEVIER SCIENCE
WOS记录号	WOS:000224372200008
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/64505]
专题	中国科学院地质与地球物理研究所
通讯作者	Fei, W
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Univ So Calif, Dept Earth Sci, Los Angeles, CA 90089 USA 3.Univ Ningxia, Dept Phys & Informat, Yinchuan 750021, Peoples R China
推荐引用方式 GB/T 7714	Fei, W,Li, HC,Zhu, RX,et al. Late quaternary downcutting rates of the Qianyou River from U/Th speleothem dates, Qinling mountains, China[J]. QUATERNARY RESEARCH,2004,62(2):194-200.
APA	Fei, W,Li, HC,Zhu, RX,&Qin, FZ.(2004).Late quaternary downcutting rates of the Qianyou River from U/Th speleothem dates, Qinling mountains, China.QUATERNARY RESEARCH,62(2),194-200.
MLA	Fei, W,et al."Late quaternary downcutting rates of the Qianyou River from U/Th speleothem dates, Qinling mountains, China".QUATERNARY RESEARCH 62.2(2004):194-200.