甘肃北山预选区EH4电磁系统野外数据采集及特性研究  

Study on data acquisition and characteristics of EH4 electromagnetic system for the preselected area in Beishan region of Gansu province

作　　者：程文涛[1] 龚育龄[1] 莫撼[1] 邓居智[1] 张华[1] 

机构地区：[1]东华理工大学放射性地质与勘探国防重点学科实验室,江西抚州344000

出　　处：《工程勘察》2010年第10期87-92,共6页Geotechnical Investigation & Surveying

基　　金：国防科学技术工业局项目(2008-652)

摘　　要：针对北山预选区基岩大量出露地表,近地表横向电性不均匀性较大这一情况,介绍了如何将EH4电磁系统应用于北山预选区的野外剖面测量,浅析了在戈壁滩这一特殊地理环境下野外数据采集中遇到的问题,对野外原始数据特性进行了初步讨论分析。研究表明,花岗岩体与围岩存在明显的电性差异,部分测点在频段1000～3000Hz掉频现象严重,部分测点在整理时要消除静态效应的影响,为野外施工及后期资料的处理提供了参考。Beishan pre-selected area is located in the arid gobi desert in northwest of China, where there are a large number of bedrock exposed on the surface. It is introduced how to correctly apply EH4 electromagnetic system to the field profiling of Beishan pre-selected area. The problems in the field data collection for the special geographical environment are studied, and the characteristics of the field data are discussed. It is indicated that the electricity difference obviously exists between the granite and the surrounding rock, which provide a reference for the field construction and the follow-up data processing.

关 键 词：北山预选区 EH4 数据采集 特性 

分 类 号：P631[天文地球—地质矿产勘探]