CSAMT法在江西西北部某钨矿勘探中的应用

可控源音频大地电磁方法CSAMT（Application of Controllable Source Acoustic-frequency Magne-totelluric Method）是一种人工源频率域电磁测深方法,具有勘探深度大,分辨率高,工作效率高,尤其在地形复杂地区能有效地施工等优点,已广泛应用于地热水资源勘查、水文地质勘查、深部金属和非金属矿产勘查中。本文以利用可控源音频大地电磁法在赣西北部某地形复杂地区进行隐爆角砾岩型钨矿体和石英脉型钨钼矿体勘探为例,在简要介绍CSAMT方法的基本特点以及数据采集和处理的基础上,结合区域地质资料对勘探区CSAMT资料进行了地质推断解释,圈定了勘探区的构造以及目标岩体的分布情况,为地质分析以及钻孔布置提供了可靠的物探证据。

Application of Controllable Source Acoustic-frequency Magnetotelluric Method (CSAMT) to Prospect Tungsten Ore in Northwestern Jiangxi

CSAMT is an artificial source frequency domain electromagnetic sounding method,which has been used to prospect geothermal water resources,hydrogeology,metallic ore and nonmetallic ore widely because of its deeper sounding,high horizontal resolution,high efficiency,especially working in complex terrain area.An actual exploration in a complex terrain area locating in northwestern Jiangxi had been operated by CSAMT method to prospect the hydrothermal breccia tungsten ore and the tungsten and molybdenum ores of quartz vein type.This paper introduced the characteristics of the CSAMT method,how to collect data and process them,then made the geological interpretation based on local geological data,and finally delineated the structure and the distribution of the rock mass.All of these provided reliable evidence for the geoanalysis and the location of drillings.