大兴安岭查巴奇地区水系沉积物地球化学特征及找矿方向

Geochemical Characteristics of Stream Sediments and Prospecting Direction in the Chabaqi Area of Da Hinggan Mts

采用R型聚类分析方法和衬值累乘法,圈定综合异常以消除地质背景对异常圈定的影响。重要综合异常区主要发育在变质岩及其与酸性侵入体接触部位。综合异常具有沿着NE和NNE向断裂构造发育的特征,依据综合异常特征和地质信息圈定出3个成矿远景区。查巴奇小东沟屯和平顶山是本区寻找石英脉型和破碎带型金铜矿的有利区段;新兴屯—德胜屯是寻找热液型(斑岩型)矿床的远景区。

R-type cluster analysis and contrast value multiplication accumulating method were adopted to eliminate the effect of geological background during delineating the comprehensive anomalies of geochemistry.The main comprehensive anomalies are mainly located in the metamorphic rocks and the contact location with the acid intrusive bodies,and also developed along the NE and NNE faults.Three metallogenic prospective areas in the Chabaqi area were delineated based on the geological information and anomaly characteristics.Xiaodonggoutun and Pingdingshan prospective areas are the potential areas of quartz vein type and broken belt type gold-copper deposits,and the hydrothermal type（or porphyry type） deposits in Xinxingtun-Deshengtun area are the main exploration direction.