河南嵩县槐树坪金矿矿体富集规律与电性特征的关系

Relationship Between the Enrichment Regularity and Electrical Characteristics of Huaishuping Gold Deposit in Song County,Henan Province

河南省嵩县槐树坪金矿床是近期在豫西熊耳山地区发现的大型构造蚀变岩型金矿床,主矿体为隐伏矿体,赋存于缓倾斜断裂构造蚀变带中。矿区矿石低阻、高极化特征明显,矿体与围岩的物性特征差异较大。为进一步揭示矿区矿体的激电响应特征,为矿区后续找矿工作提供可靠依据,在详细分析矿床地质特征的基础上,选择ZK24-0510、ZK24-4512钻孔开展了激电测井工作,对测井异常特征进行了详细解译,并进行了钻探验证。研究表明:(1)矿区自然电位和电阻率受地形、地下水等因素的影响较大,对矿化蚀变带的指示效果较差;(2)黄铁矿化程度高、厚度较大时,激电响应特征明显,故而极化率可以对矿化蚀变带起到明显的指示作用,可以作为矿区井中激电成果解译的重点参数。

Huaishuping Gold Deposit in Song County is the large tectonic altered rock type gold deposit that is newly found in Xionger Mountain Area in Western Henan Province in recently,which main ore-bodies are belongs to concealed ore-bodies,and the area distributed in the slowly inclined fracture tectonic alteration zone. The ores in the mining area are characterized by low resistance and high polarization,the difference of the geophysical characteristics of the ore-body and its surrounding rock mass is significant. In order to analyze the electrical response characteristics of the ore-body and provide some reliable reference for the further prospecting work in the mining area,based on analyzing the deposit geological characteristics,taking the ZK24-0510 and ZK24-4512 borehole as the study examples,the borehole induced polarization（ IP） method is adopted,the induced polarization（ IP） anomaly characteristics is interpreted,and corresponding drilling verification engineering is done. The study results indicated that：（1）the parameters of natural potential and resistivity are seriously affected by terrain,underground water and other factors in the mining area,which inferred that the indication effects of them to mineralization alteration zone is far less than polarizability;（2）the electrical response characteristics of the mineralized bodies with high pyritization and large thickness is significant,therefore,polarizability can play a significant role to the mineralization alteration zone,and it can be regarded as the important parameter for the interpretation of borehole induced polarization（ IP） data in the mining area.