大庆市西部沙地形成的地质环境分析  

Analysis of the geological environment of the formation of the sandy land in western Daqing

作　　者：马凤荣[1] 陈正言[1] 宋秀娟[1] 赵利东[1] 霍新江[1] 

机构地区：[1]大庆石油学院地球科学学院,黑龙江大庆163318

出　　处：《大庆石油学院学报》2006年第3期114-116,131,共4页Journal of Daqing Petroleum Institute

摘　　要：大庆市西部发育了面积达32.4×104hm2的沙地.通过实地调查和室内粒度分析等方法,分析了沙地的特征、沙地的物源以及沙地形成的地质环境.认为分布于沙地表面的沙质物质是沙地形成和发展的物质基础,沙质物质的粒度组成以细沙为主,少数以粉沙为主;在矿物组成上以长石和石英为主,重矿物以不稳定重矿物占优势,成熟度较低;沙质沉积物主要来源于现代流水作用、干涸湖泊和河流故道.The sand land in western Daqing amounts to 324,000 hm^2.Based on the field work and the analysis of the grain-size in the Lab,this paper reveals that the characteristics,the sand source,as well as the geological environment of the formation of the sandy land.A conclusion is reached that the sandy materials spreading widely on the surface are the material base for the occurrence and development of sandy land.The grain-size composition of the sandy materials is dominated by fine sand,followed by silt.The sandy materials mainly consist of feldspar,quart and a little heavy mineral.The heavy minerals occupy less than 1.0 percent.The unstable minerals dominate in these heavy minerals and they have lower maturity.The sandy materials mainly originate from modern fluvial action,dry lake deflation and older river courses.

关 键 词：沙地 物源 沙质物质 地质环境 大庆西部 

分 类 号：S151.323[农业科学—土壤学]