视激电率在尼日利亚某矿区激电异常评价中的应用

在双频激电法中,异常解释是工作的重点。在以往的工作中,一般直接采用视幅频率和视电阻率进行地质推断解释,对异常有时难以做出准确的解释。视激电率综合了视幅频率和视电阻率两种评价参数的信息,可以很好地压制与电子导体不相关的激电异常,为异常解释工作带来准确性。将视激电率应用于尼日利亚某矿区的激电异常评价,提取了剖面数据的二次信息,很好地区分了矿致与非矿致异常,圈定了几处异常区域。结果表明,视激电率对异常的定性及定量解释有很好的作用。

The Application of Apparent IP Ratio to Appraisal of the IP Anomalies in Nigeria

IP anomalies interpretation is the most important in dual frequency IP method.Apparent amplitude and apparent resistivity were usually used for geological deduction in the past.But sometimes it didn’t work.Integrated with the information of apparent amplitude frequency and apparent resistivity,apparent IP ratio can effectively suppress irrelative anomalies to the electronic conductor,so as to bring about the precision to the interpretation.Applied to the appraisal of Nigerian IP anomalies,the author separates the ore-related anomalies from barren ones by extracting secondary information of the sectional data.It proves useful in the practical work.