民勤绿洲沙源分析  

The Provenance of Eolian Sediments in Minqin Oasis,Gansu Province

作　　者：任孝宗[1] 王振亭[1,2] 

机构地区：[1]兰州大学西部环境教育部重点实验室,甘肃兰州730000 [2]中国科学院沙漠与沙漠化重点实验室,甘肃兰州730000

出　　处：《宁夏大学学报（自然科学版）》2010年第1期88-92,共5页Journal of Ningxia University(Natural Science Edition)

基　　金：国家科技基础基金资助项目(2006FY110800)

摘　　要：通过对巴丹吉林沙漠、腾格里沙漠、乌兰布和沙漠和民勤绿洲地表沙样的微量元素测定,用标准化方法建立三源混合模型示踪民勤地表流动沙丘物源.结果表明,民勤南、北2区流动沙丘具有多源特征,混合物源为7∶2∶1时(巴丹吉林沙漠、腾格里沙漠与乌兰布和沙漠的比值),与民勤南部的标准化模型相对一致;混合物源为5∶4∶1时与民勤北部标准化模型相对一致,微量元素示踪风成沉积物虽然有一定缺陷,但仍然不失为一种较理想的示踪手段.It is helpful to control the desertification in Minqin oasis by provenance of the moving sand dunes around Minqin. The trace elements samples in Badain iaran desert, Min Qin oasis, Tengger desert and Ulan Buh Desert was analyzed, then the provenance of the moving sand dunes in Minqin oasis was determined using the ternary mixing model which was set up with normalized method. The results were the moving sand dunes in south and north Minqin had a mixing-source character. The mixture of source provided the closest fit to the normalization of the south Minqin when the ratio of Badain Jaran Desert, Tengger Desert and Ulan Buh Desert is 7 ： 2 ： 1. The mixture of source provided the closest fit to the normalization of the north Minqin when the ratio of Badain Jaran Desert, Tengger Desert and Ulan Buh Desert is 5 ： 4 ： 1. There were some disadvantages in provenance of eolian sediments with trace elements, but it still was a ideal provenance method.

关 键 词：民勤绿洲 微量元素 示踪 沙漠化防治 

分 类 号：S288[农业科学—农业水土工程]