Development of multi-channel observation and inversion for IP electrical sounding method  

激电测深多通道观测方法及反演成像（英文）

作　　者：刘海飞[1,2] 柳建新[1,2] 郭荣文[1,2] 童孝忠[1,2] 龚露[1] 彭艳华[1] 

机构地区：[1]中南大学地球科学与信息物理学院,长沙410083 [2]中南大学有色资源与地质灾害探查湖南省重点实验室,长沙410083

出　　处：《Transactions of Nonferrous Metals Society of China》2014年第3期816-823,共8页中国有色金属学报（英文版）

基　　金：Project(41174102)supported by the National Natural Science Foundation of China

摘　　要：In order to improve the exploration effect of deep non-ferrous mineral resources, multi-channel observation methods for induced polarization （IP） electrical sounding data and their inversion imaging technology are studied. First of all, four multi-channel observation methods are developed based on conventional IP electrical method, namely three-electrode and four-electrode arrays of unilateral and bilateral current transmitting. Then the maximum smoothness constrained inversion method of the least squares sense for IP electrical sounding data is proposed, and the inversion software is programmed. Finally, the simulation and inversion results of geo-electrical model for the proposed observation methods are analyzed. And the comparison results show that three-electrode array of bilateral current transmitting gives the best result, but the intensity in field work is larger than others; unilateral three-electrode and four-electrode arrays give the better results. Taking detection results and convenience of field exploration work into consideration, these two methods are more suitable for practical application; bilateral observation method of four-electrode array is not suitable for the detection of the steep ore bodies.为了改善中深部有色金属矿产资源的勘探效果,对激电测深多通道观测方法及反演成像技术展开研究。首先,提出4种多通道观测方法,包括单边和双边供电的三极和四极模式。然后,给出最小二乘意义下激电测深最大光滑约束反演方法,编制反演程序。通过对模拟和反演结果进行分析,双边供电的三极观测方法勘探效果最佳,但野外工作强度较大;单边供电的三极和四极观测方法的勘探结果较好,从探测效果及野外施工的角度考虑,它们更适合于实际应用;双边供电的四极观测方法不适于探测产状较陡立的脉状矿体。

关 键 词：IP electrica-1 sounding multi-channel observation deep exploration inversion imaging 

分 类 号：P618.4[天文地球—矿床学] P631.3[天文地球—地质学]