新疆博罗科努成矿带东段地球化学分形特征及找矿预测

Geochemical fractal characteristics and prospecting prediction of the eastern section of the Boluokenu metallogenic belt,Xinjiang

根据对博罗科努成矿带东段约800 km^2内2 269个水系沉积物样品的11项元素分析数据的统计分析,确定Cu,Pb,Zn,Ag,Bi和Mo为主要的示矿元素。示矿元素的C-A分形模型拟合直线多为三段式,体现多重分形特征。根据其拐点划分出地球化学背景、区域异常与局部异常,并基于乘积综合异常圈定出莱历斯高尔、可克萨拉和萨雷玛扎尔3个预测靶区。各预测靶区与区内已发现矿床的分布高度吻合,体现出地球化学分形异常在找矿预测中具有良好的应用效果,为未知矿床的探寻提供了良好的方法。

Statistical analysis of 11 elements from 2 269 stream sediment samples collected in a region of about 800 km^2 of the eastern Boluokenu metallogenic ore belt suggested that the Cu,Pb,Zn,Ag,Bi and Mo could be used as main elements for ore-prospecting.The fitting straight lines of C-A fractal model of ore-prospecting elements were mostly three sections,which reflected the multifractal features.According to their inflection points,the geochemical background,regional anomaly and local anomaly were divided,and three predicted target area such as Lailisigaoer,Kekesala and Saleimazhaer had been located on the basis of the product synthesis anomaly in the study area.The distribution of ore deposits found in the predictied target areas was in good agreement with that of the predicted target areas,which showed that the geochemical fractal anomaly had a good application effect in the prospecting and prediction,and provided a useful method in searching for unknown deposits.