Statistics – Applications
Scientific paper
Apr 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001georl..28.1643r&link_type=abstract
Geophysical Research Letters, Volume 28, Issue 8, p. 1643-1646
Statistics
Applications
28
Hydrology: Groundwater Transport, Physical Properties Of Rocks: Magnetic And Electrical Properties
Scientific paper
The hydroelectric coupling generating self-potential anomalies recorded on the Earth's surface has received a considerable attention in the last four years. Geophysical applications include the use of this phenomenon for mapping subsurface fluid flow, the study of hydrothermal activity, and the use of self-potential anomalies to monitor volcanic activity and the possibility, still debated, of seismic activity forecasting through the use of electromagnetic precursors of electrokinetic nature. We model here two key-parameters relevant of the hydroelectric coupling in clayey porous rocks. These two parameters are the ζ-potential and the specific surface conductivity, which depend on the electrochemistry of the pore water/mineral interface. They are modeled in the case of a kaolinite saturated by a NaCl brine using a triple layer model (TLM) in which the parameters are optimized using the Simplex algorithm.
Leroy Peter
Revil André
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