Contingency table analysis of pebble lithology and roundness: A case study of Huangshui River, China and comparison to rivers in the Rocky Mountains, USA

ISL OpenIR > 青海盐湖研究所知识仓储

	Contingency table analysis of pebble lithology and roundness: A case study of Huangshui River, China and comparison to rivers in the Rocky Mountains, USA
	Miao, Xiaodong 1,2,3; Lindsey, David A.4; Lai, Zhongping 2; Liu, Xiaodong 3
	2010-03-01
发表期刊	SEDIMENTARY GEOLOGY
卷号	224 期号:1-4 页码:49-53
关键词	Pebble Huangshui River Lithology And Roundness China Contingency Table Rocky Mountains
摘要	Contingency table analysis of pebble lithology and roundness is an effective way to identify the source terrane of a drainage basin and to distinguish changes in basin size, piracy, tectonism, and other events. First, the analysis to terrace gravel deposited by the Huangshui River, northeastern Tibet Plateau, China, shows statistically contrasting pebble populations for the oldest terrace (T7, Dadongling, 1.2 Ma) and the youngest terraces (T0-T3, <= 0.15 Ma). Two fluvial processes are considered to explain the contrast in correlation between lithology and roundness in T7 gravel versus T0-T3 gravel: 1) reworking of T7 gravel into T0-T3 gravel and 2) growth in the size of the river basin between T7 and T0-T3 times. We favor growth in basin size as the dominant process, from comparison of pebble counts and contingency tables. Second, comparison of results from Huangshui River of China to three piedmont streams of the Rocky Mountains, USA highlights major differences in Source terrane and history. Like Rocky Mountain piedmont gravel from Colorado examples, the Huangshui gravels show a preference (observed versus expected frequency) for rounded granite. But unlike Rocky Mountain gravel, Huangshui gravel shows a preference for angular quartzite and for rounded sandstone. In conclusion, contrasting behavior of lithologies during transport, not always apparent in raw pebble counts, is readily analyzed using contingency tables to identify the provenance of individual lithologies, including recycled clasts. Results of the analysis may help unravel river history, including changes in basin size and lithology. Published by Elsevier B.V.
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.isl.ac.cn/handle/363002/5923
专题	青海盐湖研究所知识仓储中国科学院青海盐湖研究所
作者单位	1.Univ Illinois, Illinois State Geol Survey, Champaign, IL 61820 USA 2.Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Salt Lake Resources & Chem, Xining 810008, Peoples R China 3.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710075, Peoples R China 4.US Geol Survey, Denver Fed Ctr, Denver, CO 80225 USA
推荐引用方式 GB/T 7714	Miao, Xiaodong,Lindsey, David A.,Lai, Zhongping,et al. Contingency table analysis of pebble lithology and roundness: A case study of Huangshui River, China and comparison to rivers in the Rocky Mountains, USA[J]. SEDIMENTARY GEOLOGY,2010,224(1-4):49-53.
APA	Miao, Xiaodong,Lindsey, David A.,Lai, Zhongping,&Liu, Xiaodong.(2010).Contingency table analysis of pebble lithology and roundness: A case study of Huangshui River, China and comparison to rivers in the Rocky Mountains, USA.SEDIMENTARY GEOLOGY,224(1-4),49-53.
MLA	Miao, Xiaodong,et al."Contingency table analysis of pebble lithology and roundness: A case study of Huangshui River, China and comparison to rivers in the Rocky Mountains, USA".SEDIMENTARY GEOLOGY 224.1-4(2010):49-53.