甘肃察汗鄂博图岭地区水系沉积物地球化学异常特征及靶区优选评价

GEOCHEMICAL ANOMALIES AND TARGET SELECTION EVALUATION OF STREAM SEDIMENT IN THE CHAHANEBOTULING AREA, GANSU PROVINCE

研究区位于哈拉湖—木里断裂带与柴北缘北隐伏断裂带之间,属于南祁连干旱荒漠—高寒山区,出露地质体受区域构造控制呈NW—SE向展布。本次在1 045 km2范围内开展1∶5万水系沉积物测量,分析17种元素共圈定单元素异常438个、综合异常52个,利用R型因子分析划分元素组合,结合地质背景将圈定的异常归为4大类,并从元素组合特征方面及异常查证情况分析,评价异常找矿前景,确定了4个找矿远景区,在对成矿地质条件、化探异常特征及开展矿产检查工作的基础上,优选出1个重点找矿靶区。

The study area are located between the Har Lake-Muli fault zone and the northern margin of the Qaidam Basin buried fault zone,it belongs to the arid desert-cold mountain of Qilian.The exposed geological body is distributed in NW-SE direction by the regional tectonic control. The analysis of the 17 elements and delineation single element anomaly 438、comprehensive anomaly 52 with 1：5 million River sediment measurement in the 1045km2 area.Using element association by R type factor analysis and combined with the geological background, the anomalies are classified into 4 categories, meanwhile, using the element association feature and anomaly verification to evaluat anomaly forprospecting,and 4th prospecting area was pointed,According to the geological conditions for mineralization as well as characteristics of anomalies during geochemcial exploration and mineral exploration,and 1 key prospecting target areas are selected.