大功率TEM法在锡铁山矿区深边部找矿中的应用效果

High-Power TEM Application in Deep and Verge Prospecting at Xitieshan Mining Area

锡铁山铅锌矿区大功率TEM法深边部找矿研究发现,除少数异常在老地层上以外,几乎所有的异常均在滩间山群上。03线2 942 m标高走向坑道勘探发现了隐伏Ⅳ矿带片岩型矿床,与2000年发现的TEM异常吻合,从而明确了TEM法在锡铁山深边部找矿的指导意义。TEM响应电位异常曲线反映规则低阻形体的异常特征,如陡产状厚板状低阻体的双峰盖帽特征、缓产状板状低阻体的箱形或似箱形特征等,构成低阻形体的物理模型。勘探验证结果是铅锌矿体与近矿局部炭质层和黄铁矿体组成的宏观低阻形体,可视为矿床的地质模型。这两个模型是客观存在事物的两个侧面表现,它为识别矿致异常提供了科学依据。

In prospecting the deep and verge in Xitieshan mining area by high-power TEM since 2000,almost all the abnormity is found in the stratum of Tanjianshan Group,except for a little in the old stratum.The concealed IV mine-belt,which is schist type deposit,is discovered in prospecting drift at Line 03 elevation of 2942 in agreement with the TEM abnormity detected in 2000,significant prospect in deep and verge of Xitieshan mining.The response potential curves of TEM display abnormal characters of regular conductors.These regular conductors are called low resistivity physical models.The prospecting results show that the low resistivity body in the mass is made up of Pb-Zn mining bodies.The carbonaceous layer near the deposit and pyrite may be recognized as mineral geological model.The two models represent the existence of twain sides,providing a scientific basis for abnormity indentification in the mine.