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.
出处
《大庆石油学院学报》
CAS
北大核心
2006年第3期114-116,131,共4页
Journal of Daqing Petroleum Institute
关键词
沙地
物源
沙质物质
地质环境
大庆西部
sandy land
sand source
sandy material
geological environment
