摘要
笔者利用激电测量和EH4电磁测深两种方法,对河北省丰宁县二道沟银多金属矿区进行了测量,并对该矿区岩石-矿石物性特征、激电异常特征和EH4连续电导率剖面特征等与矿化蚀变带之间的联系进行了探索。结果显示:1)黄铁矿方铅矿化蚀变岩总体表现为相对低阻高极化特性,采用EH4电磁测深和激电法寻找本区隐伏矿体条件良好;2)矿区的激电异常特征与矿(化)体特征吻合较好,激电异常带与矿化带相互对应,与岩石地球化学组合异常相对应,通过激电测深反演,分析极化率、电阻率异常特征,可推测深部隐伏蚀变矿化带;3)本区断裂构造控矿特征明显,利用EH4连续电导率剖面测量较好的反映了本区深部构造特征,特别是断裂构造特征,指示出找矿的有利部位。这表明利用激电测量和EH4电磁测量对该类型矿床的找矿具有良好指导作用。
In this paper, the geophysical and geochemical measurements of Erdaogou silver polymetallic deposit in Fengning County, Hebei Province were carried out by means of two kinds of geophysical methods, such as the combination of induced polarization method measurement and EH4 electromagnetic measurement. The rock-ore physical characteristicsand the relationship between profile measurement and mineralization alteration zone were studied. The results show that： 1 ）The pyrolysis rocks of pyrite show lower resistance and higher polarization characteristics than surrounding rocks. The EH4 electromagnetic sounding and the electrokinetic method are used to find the characteristics of the hidden ore body in this area; 2）The characteristics of the anomaly in the mining area are in good agreement with the characteristics of the ore body, the anomalous characteristics of the induced polarization are in good agreement with the altered mineralized zone in the mining area, and are in correspondence with the geochemical anomaly; through the inversion by induced polarization sounding, analysis of polarizability, resistivity anomalies, speculation deep hidden alteration mineralization zone; 3）The fault- controlling structure of the fault structure in this area is obvious, and the EH4 continuous conductivity profile can reflect the deep tectonic characteristics of the area much better, and it also can reflect the deep tectonic characteristics of the area. Especially the fault structure characteristics, is conducive to prospecting. The interaction between the anomalous band and the mineralization zone shows that the induced polarization method and EH4 electromagnetic measurements are used to study the prospecting of this type of deposit.
出处
《地质调查与研究》
2017年第3期231-237,共7页
Geological Survey and Research
基金
河北省地质勘查专项资金项目"河北省丰宁满族自治县四岔口乡二道沟-北灰窑银多金属矿普查"
关键词
二道沟
银多金属矿
地球物理特征
激电异常
Erdaogou
silver polymetallic deposit
geophysical characteristics
IP anomaly
作者简介
王纪昆（1981-），男，2017年毕业于中国地质大学（北京），获硕士学位，工程师，从事地质矿产勘查工作，E-mail：nzjgzx@163．com。
