干旱区生态环境知识资源中心(Arid): Tracking denudation and sediment production and transport with cosmogenic Be-10 in arid, high-altitude Himalayan half-grabens, Zanskar, northern India

Arid

DOI	10.1002/esp.4954
	Tracking denudation and sediment production and transport with cosmogenic Be-10 in arid, high-altitude Himalayan half-grabens, Zanskar, northern India
	Dietsch, Craig; Hedrick, Kathryn; Owen, Lewis A.; Caffee, Marc W.
通讯作者	Dietsch, C
来源期刊	EARTH SURFACE PROCESSES AND LANDFORMS
ISSN	0197-9337
EISSN	1096-9837
出版年	2020
卷号	45 期号:13 页码:3103-3119
英文摘要	Understanding the extent to which local factors, including bedrock and structure, govern catchment denudation in mountainous environments as opposed to broader climate or tectonic patterns provides insight into how landscapes evolve as sediment is generated and transported through them, and whether they have approached steady-state equilibrium. We measured beryllium-10 (Be-10) concentrations in 21 sediment samples from glaciated footwall and hanging wall catchments, including a set of nested catchments, and 12 bedrock samples in the Puga and Tso Morari half-grabens located in the high-elevation, arid Zanskar region of northern India. In the Puga half-graben where catchments are underlain by quartzo-feldspathic gneissic bedrock, bedrock along catchment divides is eroding very slowly, about 5m/Ma, due to extreme aridity and Be-10 concentrations in catchment sediments are the highest (similar to 60-90x10(5) atoms/g SiO2) as colluvium accumulates on hillslopes, decoupled from their ephemeral streams. At Puga, Be-10 concentrations and the average erosion rates of a set of six nested catchments demonstrate that catchment denudation is transport-limited as sediment stagnates on lower slopes before reaching the catchment outlet. In the Tso Morari half-graben, gneissic bedrock is also eroding very slowly but Be-10 concentrations in sediments in catchments underlain by low grade meta-sedimentary rocks, are significantly lower (similar to 10-35x10(5) atoms/g SiO2). In these arid, high-elevation environments, Be-10 concentrations in catchment sediments have more to do with bedrock weathering and transport times than steady-state denudation rates. (C) 2020 John Wiley & Sons, Ltd.
英文关键词	Zanskar Be-10 concentration catchment denudation bedrock erosion transport-limited
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000586040900003
WOS关键词	TIBETAN PLATEAU ; EROSION RATES ; THRESHOLD HILLSLOPES ; LANDSCAPE EVOLUTION ; SOLIFLUCTION RATES ; ROCK UPLIFT ; EXHUMATION ; TECTONICS ; PRESSURE ; NUCLIDES
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/327321
作者单位	[Dietsch, Craig; Hedrick, Kathryn] Univ Cincinnati, Dept Geol, Cincinnati, OH 45221 USA; [Owen, Lewis A.] N Carolina State Univ, Dept Marine Earth & Atmospher Sci, Box 8208, Raleigh, NC 27695 USA; [Caffee, Marc W.] Purdue Univ, Dept Phys & Astron, W Lafayette, IN 47907 USA; [Caffee, Marc W.] Purdue Univ, Dept Earth Atmospher & Planetary Sci, W Lafayette, IN 47907 USA
推荐引用方式 GB/T 7714	Dietsch, Craig,Hedrick, Kathryn,Owen, Lewis A.,et al. Tracking denudation and sediment production and transport with cosmogenic Be-10 in arid, high-altitude Himalayan half-grabens, Zanskar, northern India[J],2020,45(13):3103-3119.
APA	Dietsch, Craig,Hedrick, Kathryn,Owen, Lewis A.,&Caffee, Marc W..(2020).Tracking denudation and sediment production and transport with cosmogenic Be-10 in arid, high-altitude Himalayan half-grabens, Zanskar, northern India.EARTH SURFACE PROCESSES AND LANDFORMS,45(13),3103-3119.
MLA	Dietsch, Craig,et al."Tracking denudation and sediment production and transport with cosmogenic Be-10 in arid, high-altitude Himalayan half-grabens, Zanskar, northern India".EARTH SURFACE PROCESSES AND LANDFORMS 45.13(2020):3103-3119.