音频大地电磁测深在成矿规律研究中的应用

Metallogenic regularity of audio-magnetotelluric method in the study of metalogenic regularity

为研究长江中下游地区的成矿规律和地下中浅部精细的电性信息,使用美国EMI公司生产的EH4音频大电磁测深仪,在安徽泥河示范矿区周围及地下中部进行勘探工作,使用非线性共轭梯度方法进行资料反演工作,获得较好结果。经过钻井验证,地电剖面圈定的异常、层位与地下矿体、层界面对应良好,误差小,揭示了成矿位置以及矿体周围的电性结构,为进一步研究成矿规律提供支持。

For the study of metallogenic regularity in the middle and lower reaches of Changjiang River. We use EH4 MT system produced by EMI probe the structure of Nihe in Anhui Province. Data inversion is performed with nonlinear conjugate gradient method. After verification with drill, it is found that the abnormal bodies and layers in inversion profile are identical with drilling results, revealing the station of mine and the electric structure around the mine. The results provide a solid backup for the further study of metallogenie regularity.