陕西凤太矿田西岔沟“隐伏背斜”存在证据及找矿潜力分析

The Evidence and Analysis of Prospecting Potential of "Concealed Anticline" in Xichagou,Fengtai-Mine Field,Shaanxi Province

西岔沟"隐伏背斜"位于凤太矿田西部的八方山-二里河控矿背斜与甘沟控制背斜中间的星红铺组千枚岩中覆盖区,背斜核部古道岭组灰岩全部潜伏地下。背斜特征与北翼的八方山-二里河控矿背斜相似,SOTEM测量在背斜核部对应的深部获得了与试验剖面在已知铅锌矿体上一致的低视电阻率异常,认为有寻找受背斜构造控制,形态完整、规模较大隐伏铅锌矿的潜力。

The ＂concealed anticline＂ of Xichagou lies in the Xinghongpu formation of phyllite rock coverage area which is between Bafangshan-Erlihe ore-controlling anticline and Gangou ore-controlling anticline of west Fengtai-mine field.All the limestone in the Gudaoling formation of the anticlinal core is buried underground. Anticline characteristics is similar with that of Bafangshan-Erlihe ore-controlling anticline. SOTEM measurement of the deep part of anticline core obtained low apparent resistivity anomalies which is consistent with that of test profile on the known Pb-Zn orebody. Therefore, It is believed that the potential of searching for anticline structure controlled, morphological integrity and large hidden Pb-Zn deposit exists.