EMAP处理方法在CSAMT勘查中的应用

THE EMAP DATA PROCESSING TECHNIQUE AND ITS APPLICATION TO THE CSAMT SURVEY

ＥＭＡＰ处理方法建立在宽频带采集数据的基础上，通过可变截止频率的低通滤波，消除电性构造横向不均匀性造成的静态影响，使得数据资料解释工作变得简便而可行。我们通过模型实验验证了该方法的有效性，并在ＣＳＡＭＴ勘查中取得较好的效果。

Profiling prospecting method is commonly used in CSAMT survey. In fact it is an EMAP data acquisition method advocated by geophysicists in recent years. Compared with the general MT method, this one may be convenient for the EMAP data processing. The EMAP is established on the basis of data acquisited in very wide frequency band and filtered by a low pass filter with variable cutoff frequency. With EMAP, the CSAMT field surveying data processing by this mathod can eliminate the static effect caused by lateral ununifomity of underground electrical structure and simplify the data interpretation work. its effectiveniss has been verified by model experiments. When used in the CSAMT survey,satisfactory results were lbtained.