干旱区生态环境知识资源中心(Arid): 关于库姆塔格沙漠羽毛状风沙地貌的讨论

Arid

	关于库姆塔格沙漠羽毛状风沙地貌的讨论
其他题名	A Discussion on Feathery Aeolian Geomorphology in the Kumtagh Desert
	董治宝1 ; 屈建军1 ; 卢琦2 ; 钱广强 1
ISSN	1000-694X
出版年	2008
卷号	28 期号:6 页码:1005-1010,1214
中文摘要	库姆塔格沙漠是我国最后一个完成综合科考的沙漠，以其北部的羽毛状沙丘著称。以往关于库姆塔格沙漠风沙地貌的认识主要基于遥感影像判读。最近深入沙漠腹地的实地考察引发了对该沙漠羽毛状沙丘的争论。本文从地质构造、遥感影像纹理特征、沙丘形态特征、风况特征、组成沙丘沉积物的粒度特征、矿物组成、光谱特征、颗粒形貌等多层次、多视角探讨库姆塔格沙漠的羽毛状风沙地貌。提出从三种空间尺度上区分羽翼状沙漠、羽毛状图案（伪羽毛状沙丘）和羽毛状沙丘的必要性。认为：①库姆塔格沙漠的羽翼状总体格局是受新构造运动控制的。②以往基于航片判读确认的羽毛状沙丘实际上是由线性（赛夫）沙丘、丘间走廊的亮色浮沙片和残余暗色粗沙地的反照率对比形成的羽毛状图案，并非真正的复合沙丘。③真正的羽毛状沙丘应该是指有明显新月形沙丘遗留翼角的赛夫沙丘（线性沙丘）的变型。④由赛夫沙丘到羽毛状沙丘，风况愈来愈复杂。
英文摘要	Kumtagh Desert is the last desert being broadly scientifically explored in China. The desert is famously characterized by the so-called feathery dunes in the north. The dune types and morphology used to be recognized on remote sensing images until recently. Recent field investigation into the desert led to some arguments on the feathery aeolian geomorphology. This paper attempts to make an overall discussion on the feathery geomorphology based on geological structure, analysis of remote sensing images, dune morphome- try, wind regime, sediment size distribution, mineralogy, reflectance spectrum and micromorphology. It is necessary to distinguish between the so-called feathery geomorphology on three spatial scales： feather wing appearance of the desert, feather-like patterns and feathered dunes. The general appearance of feather wing of the desert is controlled by geological structures. The feathery patterns in fact reflect the albedo contrasts between the self dunes, bright dune-like drifts and the dark inter-dune lag sediments. The wind regime in the area containing the so-called feathery dunes is typical of the regime that produces self dunes that were considered to be shafts of the feathery dunes, and the vanes of the feathery dunes are in fact bright dune-like drifts with indistinct height from the surroundings rather than true transverse dunes. The feathered dune is a variety of seif dunes. The wind regime becomes more complex from typical linear dunes, to seif dunes and feathered dunes.
中文关键词	风沙地貌 ; 羽毛扇状沙漠 ; 羽毛状图案 ; 羽毛状沙丘
英文关键词	aeolian geomorphology feather fan appearance feather-like patterns feathered dunes
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOSCIENCES MULTIDISCIPLINARY
WOS研究方向	Geology
CSCD记录号	CSCD:3453901
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/223180
作者单位	1.中国科学院寒区旱区环境与工程研究所, 兰州, 甘肃 730000, 中国; 2.中国林业科学研究院林业研究所, 北京 100091, 中国
推荐引用方式 GB/T 7714	董治宝,屈建军,卢琦,等. 关于库姆塔格沙漠羽毛状风沙地貌的讨论[J]. 中国科学院西北生态环境资源研究院,2008,28(6):1005-1010,1214.
APA	董治宝,屈建军,卢琦,&钱广强.(2008).关于库姆塔格沙漠羽毛状风沙地貌的讨论.,28(6),1005-1010,1214.
MLA	董治宝,et al."关于库姆塔格沙漠羽毛状风沙地貌的讨论".28.6(2008):1005-1010,1214.