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毛乌素沙漠西南部,在内蒙古自治区伊克昭盟鄂克托旗布拉格公社至城川公社一带(简称布城区),在长约一百公里范围内,有固定型、半固定型和流动型等各种沙丘,呈西北一东南向断续分布。该区砂样是从西北向东南约以间距10—15公里依次取得(图1),在各取样点分别采有风砂样和下伏第四系土样,共采样17块。风砂样采自沙丘顶部迎风坡(坡角10°—20°)与背风坡(坡角30°)交界附近,深约20公分处。在粒度分析、矿物成份
In the southwest of the Mu Us Desert, in the area of Prague Commune to the Chengchuan Commune (referred to as Putrajaya area) in the Yikezhao League Akto Banner in the Inner Mongolia Autonomous Region, there are various dunes in the area of about 100 km long, including fixed type, semi-fixed type and mobile type , Was a distribution of north-east-southeast intermittent. Sand samples from the area are obtained from the northwest to the southeast at intervals of 10-15 km (Fig. 1). In each sampling site, there are sand samples of the wind and underlying Quaternary soil samples, a total of 17 samples. The sand samples were collected from the junction of the windward slope (slope angle 10 ° -20 °) and the lee slope (slope angle 30 °) at the top of the sand dune at a depth of about 20 cm. In particle size analysis, mineral ingredients