激电中梯测量在瑙木浑沟口金矿勘查中的应用

Application of Induced Polarization Gradien Array Measurement in the Exploration of Naomuhun Goukou Gold Deposit

摘要:

激电中梯是寻找金属硫化物富集体的有效地球物理勘探电法，该文主要解析了激电中梯测量在瑙木浑沟口地区寻找金矿勘查中的应用。通过在区内选择合适位置开展激电中梯测量并进行数据解译，圈定5处激电异常靶区结合探矿工程查证，获得了较好的异常解释效果。研究区采用激电中梯测量与探矿工程相结合，共划分2个矿化蚀变带9条金矿体，金矿石类型为黄铁矿化、方铅矿化碎裂岩型，主矿体Ⅱ5号金品位（3.93～5.31）×106，平均品位4.92×106，主要有黄铁矿化、黄铜矿化、方铅矿化、闪锌矿化，金矿体主要赋存于NW向构造蚀变破碎带中，金与金属硫化物关系密切。因此，认为该区金矿勘查利用激电中梯测量圈定激电异常，找矿效果较好。

Abstract:

IP intermediate gradient is an effective geophysical prospecting method for finding metal sulfide enrichment. The application of induced medium elevator survey in gold prospecting in Naomuhun Goukou area has been interpretated. By choosing suitable locations in the area to carry out Ip intermediate gradient and data interpretation, five IP anomaly target areas have been delineated and verified by prospecting engineering, and good results of anomaly interpretation have been obtained. The study area is divided into two mineralization alteration zones and nine gold ore bodies by the combination of IP intermediate gradient and prospecting engineering. The gold ore types are pyritization and galena mineralization cataclastic rock type. The gold grade of Ⅱ5 ore body is (3.935.31) ×106, and average grade is 4.92×106. Pyritization, chalcopyrite mineralization, galena mineralization and sphalerite mineralization are main ore bodies. The gold ore bodies mainly occur in the structure with the trend of NW. Gold is closely related to metal sulfides in altered fracture zones. Therefore, it is considered that the exploration of gold deposits in this area can delineate the IP anomaly by using IP medium elevator survey, and gained good prospecting effect.