摘要
在浅覆盖区开展电法勘探时,由于存在供电电流易被低阻覆盖层吸收和深部电磁信号又被屏蔽减弱,薄层金属矿体难以识别的难题。基于突破高阻或低阻覆盖层屏蔽,获得有效矿致信号的思路,我们开展了磁电勘探法实验研究。采用V8系统与其他仪器设备组合,完成发射与接收工作。分别测量不同频率的交变电磁场对矿体激励所产生的磁场和电位,并计算磁频散率和电频散率。提取局部异常信息,对比研究识别矿体。在安徽省某金矿区薄层矿体识别取得了一定的效果,拓展了V8系统地质找矿中应用范围。
Abstract： During the electrical prospecting on the shallowed coverage area,Due to the supply current is easily absorbed by the low resistance coverage and deep electromagnetic signals are shielded weakened,Thin layer metal ore difficult to be identified. Based on breakthrough high resistance and low resistance layer shielding cover to obtain effective ore induced signal of ideas, We carry out the magneto electric prospecting method experimental study. Using V8 system and other instruments to complete the work of launching and receiving. The magnetic field and electric potential generated by the alternating electromagnetic field of different frequency to the excitation of the ore bodies are measured respectively. Calculate the magnetic dispersion rate and the electric dispersion rate. Extracting and comparing the local anomaly information to identify the ore bodies. A certain effect has been achieved in the identification of thin ore bodies in a gold deposit in Anhui Province,Which has extended the application range of V8 system in geological prospecting.
出处
《中国矿业》
北大核心
2016年第4期146-149,共4页
China Mining Magazine
基金
安徽省国土资源厅国土资源科技项目"浅覆盖区找矿磁电勘探法新技术试验研究"资助(编号:2014-K-08)
关键词
磁电勘探法
浅覆盖区
频散率
矿体识别
V8
magnetic prospecting method
shallow overburden area
frequency dispersion
thin layer ore body identification
electrical reflectivity
V8 systems
