青海省尕河地区水系沉积物测量异常特征及优选找矿靶区

摘要

Based on processing of data obtained from 1 ∶ 25 000 stream sediment survey in Gahe River area, the authors delineated a-nomalies of such elements as Cu, Pb, Zn, Ag, Au, As, Sb, Cr, Ni and Co, detected the distribution characteristics of the anomalies in the study area, evaluated the ore-prospecting significance of the anomalies, and determined the element association. In combination with the metallogenic geological background and according to the geochemical composite anomalies and association features of mesother-mal-epithermal elements, four perspective areas in search for Pb, Ni and Ti deposits were determined, from which No. 3 Pb target area and No. 4 Ti and Ni key target area were delineated through optimization.%通过对尕河地区1∶2．5万水系沉积物资料处理，圈定了Cu、Pb、Zn、Ag、Au、As、Sb、Cr、Ni、Co等异常，揭示了区内异常的分布特征，评价异常的找矿意义，划分了元素组合，结合地质成矿背景，依据化探综合异常及中低温热液型元素组合特征，确定Pb、Ni、Ti的4个找矿远景区，其中优选出3号铅找矿靶区，4号钛、镍重点找矿靶区。