怀宁县张家山矿区地质特征及找矿方向

Geological features and prospecting direction of Zhangjia-shan mining area in Huaining

怀宁县张家山地区为Cu、Pb、Zn、Mo、Sn多金属矿成矿区。区内成矿元素、探途元素异常发育,岩浆活动频繁,变质作用强烈。主要受O/S层间拆离断层控制,矿(化)体主要赋存于拆离断层下盘汤山组及仑山组上段之间或汤山组内层间破碎带中。汤山组下部含泥质条带大理岩,岩性不均一,有利于热液交代;汤山组上部变余鲕状大理岩与汤头组变余瘤状大理岩易于破碎,成为导矿与储矿场所。

Zhang Jia-shan area in Huaining County is Cu,Pb,Zn,Mo,Sn polymetallic ore zones. In this area, the ore-forming elements and pathfinder elements are well developed, and the geological characteristics are frequent magmatic activity and intense alteration. The mine deposits are mainly dominated by the O/S interlayer detachment faults, and the deposits are located between the Tangshan group＇s footwall of detachment faults and the upside of Kunshan group, or located in the interformational fracture zone inside Kunshan group. Argillaceous stripe marbles are found in the bottom of Tangshan group, which have advantages to the hydrothermal metasomatic due to the different lithology. Theblastooliticlimestone and the palimpsest nodular marble in Tangshan group are easy to broken,which is both of the ore-fluid channel way and the ore-fluid host structure.