沽源-宝昌盆地区域地球化学特征及若干地段应用综合物化探方法的地质效果

REGIONAL GEOCHEMICAL FEATURES AND GEOLO-GICAL EFFECT OF THE APPLICATION OF COMPRE-HENSIVE GEOPHYSICAL AND GEOCHEMICAL METHODS ON SOME AREAS IN GUYUAN- BAOCHANG BASIN

本文简要论述了沽源地区1:20万太仆寺旗幅6000km^2范围内区域放射性化探的研究工作。工作中取水系沉积物样4000余个、水氡样及水铀样1000多个,共发现沉积物铀异常点101个,水铀异常点及水氡异常点数十个,并据此划分了Ⅰ、Ⅱ类远景区。在Ⅰ类远景区内,在一些揭露点及外围地段,做了大比例尺综合物、化探方法的详查,地质效果明显。持别是在大扇子沟、骆驼山781矿点外围的异常段附近,通过钻探揭露,深部已见到工业铀矿体。

Research on the regional radiogeochemical exploration(at 1:200000 scale) within the li- mit of 6000km^2 in the Taipusi Banner Quadrangle, Guyuan area is briefly discussed in this paper. During the work, more than 4000 stream sediment samples and about 1000 waterradon and water-uranium samples were collected, resulting in the discovery of 101 uranium anomalies from stream sediments, several tens of water-radon and water-uranium anomalies. According to these anomalies category Ⅰ and category Ⅱ of perspective areas were divided. In the perspective area category Ⅰ, the detailed prospecting was undertaken by using the comprehensive geophysical and geochemical methods at a large scale in some prospects and their surrounding areas with obvious geological results. Especially near the anomalies out of Dashanzigou and Luotuoshan (Prospect No.781), economic uranium orebodies were discovered at depth by drilling.