干旱区生态环境知识资源中心(Arid): 西北区干枯湖床沉积粒度组成与东亚沙尘天气

Arid

	西北区干枯湖床沉积粒度组成与东亚沙尘天气
其他题名	Grain-size Distrbution of the ediments of Dry Lake-bed in the Northwest of China and Sand-dust Weather in East Asia
	岳乐平 1; 杨利荣 1; 李智佩 2; 王珉 3; 张维吉 3; 聂浩刚 3
来源期刊	沉积学报
ISSN	1000-0550
出版年	2004
卷号	22 期号:2 页码:325-331
中文摘要	调查了准噶尔盆地玛纳斯湖、阿拉善高原居延泽及民勤盆地猪野泽等北方众多的现代干枯湖泊，重点分析了干枯湖床沉积物粒度组成。干枯的玛纳斯湖、古居延泽以及民勤盆地古猪野泽沉积物粒度分析结果表明，干枯湖床的地表湖相沉积物粒径小于10mum的颗粒占60％以上，干涸湖床上沙质草原地表也含有大量小于10mum的粘土颗粒，含量接近50％；而弃荒土地地表细颗粒物质散失迅速，民勤盆地弃荒土地地表粘土含量仅存不到13．9％。中国西北地区活动沙丘粒度组成小于63mum粒径的颗粒很少，小于10mum的颗粒微乎其微。因此西北沙漠地区活动沙丘沙对华北或华东地区影响相对较小。认为沙尘暴、扬沙或浮尘天气虽然多发生于中国西部沙漠、阿拉善高原沙区、河西走廊北部沙区以及蒙古东部、中部地区，但由于粗颗粒沙扬起高度与搬运距离有限，真正影响整个华北、华东地区的沙尘物质是小于63mum的粉砂级别的颗粒，特别是小于10mum的粉尘。认为影响东亚地区的粉尘天气物源不仅是中国西部的内陆沙漠、沙地，更重要的是干枯的湖泊、弃耕的荒地与裸露的沙砾草场。
英文摘要	Some dry lakes widely distributed in the north of China has been investigated in this paper based on analy?sis of grain-size distribution of the sediments of these dry lakes, including Manas Lake in Junggar Basin, Juyan Lake in the Alxa Plateau, Yezhu Lake in Minqin Basin and so on. The analyzed results are as followed; the total volume-percentage of the particles ( < 10 (xm) of dry lake-bed surface sediments is above 60% . There are plenty of clay par?ticles ( < 10 mum) on the surface of sandy grassland developed from dry lake-bed and the content amount to about 50%. The tiny particles on the surface of abandoned land can be blown away easily and rapidly, so the content of clay particles in Minqin Basin is less than 13.9%. The grain-size distribution of active dune in northwest of China is the fewness of particles ( <63 mum) and very little of the particles( < 10 mum). Frequently, sands of active dune in northwest desert areas have weak influence on North China and East China. It is considered that although the weather of sand-dust storm, blowing-sand and suspending-dust occur originally in the western desert, sandy areas of the Alxa Plateau, the north of Hexi Corridor and the east, center of Mongolia, it is the sand-dust materials ( <63mum) ,spe?cially those dust( <10mum) really influence North China and East China for limitation of transportation distance and height of coarse particles. It is concluded that material sources that influence the sand-dust weather of East Asia are not only inland deserts, more importantly, but also the dry lake, abandoned land and bare sand-gravel grassland.
中文关键词	干枯湖泊沉积
英文关键词	dry-lake sediments
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOLOGY
WOS研究方向	Geology
CSCD记录号	CSCD:1644646
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/204837
作者单位	1.西北大学地质系, 大陆动力学教育部重点实验室, 西安, 陕西 710075, 中国; 2.西安地质矿产研究所, 大陆动力学教育部重点实验室, 西安, 陕西 710054, 中国; 3.西安地质矿产研究所, 西安, 陕西 710054, 中国
推荐引用方式 GB/T 7714	岳乐平,杨利荣,李智佩,等. 西北区干枯湖床沉积粒度组成与东亚沙尘天气[J],2004,22(2):325-331.
APA	岳乐平,杨利荣,李智佩,王珉,张维吉,&聂浩刚.(2004).西北区干枯湖床沉积粒度组成与东亚沙尘天气.沉积学报,22(2),325-331.
MLA	岳乐平,et al."西北区干枯湖床沉积粒度组成与东亚沙尘天气".沉积学报 22.2(2004):325-331.