南秦岭池沟地区地物化特征及其找矿意义

Geophysical and geochemical anomalies and prospecting significance of Chigou area in South Qinling Mountains

池沟斑岩型铜钼矿(化)体产于燕山期中酸性岩体内外接触带中,成岩与成矿年龄一致。区内物化探异常及矿化均围绕斑岩体呈(环)带状分布,构成斑岩型-矽卡岩型铜钼矿成矿系列。近年来,池沟地区采用高磁扫面+CSAMT(可控源音频大地电磁法)+钻探等组合方法,显示物化探异常特征与池沟出露岩体相吻合,经钻探,在池沟斑岩体接触带深部发现了厚大低品位铜钼矿体。在总结矿区地质特征的基础上,以区内物化探异常特征为依据,认为地表物化探异常与深部矿体位置形态有对应性关系,找矿潜力巨大,具有寻找斑岩型铜矿床的有利条件。

Chigou copper molybdenum deposit（ mineralization） bodies were occurred in the inner and outer contact zones of moderateacid rock mass in Yanshannian,with same rock and mineralization age. In the study area,geophysical and geochemical anomalies and mineralization were distributed around the porphyritic rock mass,forming porphyry-skarn rock type copper molybdenum deposit metallogenic series. In recent years,high magnetic scanning ＋ CSAMT ＋ drilling combination method were applied unitedly in Chigou area,displaying identical characteristics of geophysical and geochemical anomalies in the exposed rocks. Through drilling,deep and low grade copper molybdenum bodies were found in the deep porphyry contact zone. Based on summary of the geological characteristics and geophysical and geochemical anomaly characteristics,the authors considered that the surface geophysical and geochemical anomalies and deep ore body locations were of corresponding relations,showing great potential of porphyry copper deposits,and with favorable conditions for porphyry type copper deposit.