干旱区生态环境知识资源中心(Arid): Landscape evolution and development of eolian-modified unconsolidated gravel surfaces and yardangs in the Hami Basin, China

Arid

DOI	10.1016/j.geomorph.2020.107355
	Landscape evolution and development of eolian-modified unconsolidated gravel surfaces and yardangs in the Hami Basin, China
	Zhang, Dehai; Wang, Guocan; Pullen, Alex; Abell, Jordan T.; Ji, Junliang; Shen, Tianyi
通讯作者	Wang, GC
来源期刊	GEOMORPHOLOGY
ISSN	0169-555X
EISSN	1872-695X
出版年	2020
卷号	368
英文摘要	Unconsolidated gravel surfaces, alluvial terraces, and yardangs are widespread in the Turpan-Hami topographical depression of NW China. These landscape features provide an opportunity to investigate the wind erosion history and landscape evolution of the Hami Basin. Along with anomalously high near-surface wind speeds, these features suggest that the Hami Basin was an important source of mineral dust during the Pleistocene. We present the results of an integrated geomorphologic, stratigraphic, and chronologic study on the genesis of unconsolidated gravel surfaces and yardang fields in the Hami Basin. Mobilization of silt- to sand-sized fractions from the surfaces of the Quaternary alluvial sediments occurred under generally dry conditions, leaving unconsolidated gravels to organize into inflationary-type desert pavement surfaces (Type-1) and deflationary-type desert pavements surfaces (Type-2). We propose that the Pleistocene alluvial terraces of the Hami Basin formed principally during wetter intervals, which are assumed to correspond with interglacial periods. The coarse-grained alluvium atop terraces protected underlying strata from wind erosion. The bedrock then began to be sculpted into yardangs after the removal of the coarse-grained armoring surfaces. With mostly sub-horizontal bedding, the geometries of yardangs was controlled by lithology, wind and water erosion. Based on UAV-3D models, optically-stimulated luminescence (OSL) and electron spin resonance (ESR) ages, we find an erosion rate of similar to 0.23 mm/yr since similar to 200 ka, This, combined with widespread uneroded strata armored by unconsolidated gravel surfaces, indicates that the Hami Basin had considerable dust emission potential in the past. (C) 2020 Elsevier B.V. All rights reserved.
英文关键词	Wind erosion Unconsolidated gravel surfaces Yardangs Landform evolution
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000571733700005
WOS关键词	LATE PLEISTOCENE ; QAIDAM BASIN ; DUST STORMS ; TIEN-SHAN ; DESERT ; QUATERNARY ; LOESS ; CLIMATE ; DEPOSITION ; QUARTZ
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/2XILL650/326430
作者单位	[Zhang, Dehai; Wang, Guocan; Shen, Tianyi] China Univ Geosci, Ctr Global Tecton, Sch Earth Sci, Hubei Key Lab Crit Zone Evolut, Wuhan 430074, Peoples R China; [Pullen, Alex] Clemson Univ, Dept Environm Engn & Earth Sci, Clemson, SC 29634 USA; [Abell, Jordan T.] Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY 10964 USA; [Abell, Jordan T.] Columbia Univ, Dept Earth & Environm Sci, New York, NY 10027 USA; [Ji, Junliang] China Univ Geosci, Sch Geog & Informat Engn, Wuhan 430074, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Dehai,Wang, Guocan,Pullen, Alex,et al. Landscape evolution and development of eolian-modified unconsolidated gravel surfaces and yardangs in the Hami Basin, China[J],2020,368.
APA	Zhang, Dehai,Wang, Guocan,Pullen, Alex,Abell, Jordan T.,Ji, Junliang,&Shen, Tianyi.(2020).Landscape evolution and development of eolian-modified unconsolidated gravel surfaces and yardangs in the Hami Basin, China.GEOMORPHOLOGY,368.
MLA	Zhang, Dehai,et al."Landscape evolution and development of eolian-modified unconsolidated gravel surfaces and yardangs in the Hami Basin, China".GEOMORPHOLOGY 368(2020).