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Self‐potential anomalies in Cerro de Pasco and Hualgayoc areas (Peru) revisited
- Source: Geophysical Prospecting, Volume 49, Issue 1, Dec 2001, p. 151 - 154
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- 21 Dec 2001
Abstract
Self‐potential anomalies with unexplained high values have been observed in various places. Such anomalies were reported in Peru more than 30 years ago. An explanation is proposed based on the electrokinetic effect obtained when a topographic high occurs above a rock layer through which water filtrates and which itself lies over a highly resistive layer. In such a case a fairly high self‐potential may occur. Conversely, when one of these conditions is not met, the self‐potential anomaly at the earth's surface resulting from the electrokinetic effect is strongly attenuated.