EH-4电磁测深在郴州市铁石垅矿区寻找深部隐伏铅锌矿体的应用效果及找矿意义

The application effect and prospecting significance of EH-4 electromagnetic sounding to deep concealed lead-zinc ore-body in Tieshilong deposit,Chenzhou,Hunan Province

铁石垅铅锌矿床位于郴州有色多金属矿集区,是近几年危机矿山找矿效果较显著的矿区之一。通过对测区EH-4电磁测深不同剖面电性特征和不同标高平面图分析研究,解译出深部断裂位置及相对低阻异常分布范围,并对可能的矿致异常进行了重要性排序,进而确定最佳的有利含矿空间。分析认为测区最好的矿致异常沿F11断裂分布,主要分布在主干断层和次级断层的交汇部位。经钻探工程验证,在F11断裂带内揭露新的隐伏铅锌矿体7个,矿体分布与EH-4电磁测深矿致异常分布相吻合,证实矿区利用EH-4电磁测深寻找深部隐伏矿体效果较好,为矿区及外围寻找深部隐伏铅锌矿体提供了新的有效找矿方法。

Tieshilong lead-zinc deposit is located in nonferrous multi-metal ore-concentrated area of Chenzhou,which is one of the mine areas that have significant prospecting effect in recent years. Based on the analysis of profile electrical characteristics and plans of different levels of EH-4 electromagnetic sounding, interpreting the distribution position of faults and low resistivity anomalies, sort the possible mineralization anomalies, and then identify the best favorable ore space. Analysis show that the best part of the mineralization anomalies are distributing along the F11 fracture in this surveyed area, and mainly distribute in the intersection area between major faults and the sub-faults. By drilling engineering verification, 7 new concealed ore bodies were found within the F11 fault zone. The orebody distribution and mineral anomalies of EH-4 electromagnetic sounding consistent, demonstrating the prospecting effect of EH-4 electromagnetic sounding is better, provide a better prospecting method for looking for the deep concealed ore body in thisdeposit and the periphery.