Definition: Self-Potential (SP)
The self-potential (SP) technique is a passive electrical geophysical method based upon the measurement of spontaneous or natural electrical potential developed in the earth due to: 1) electrochemical interactions between minerals and subsurface fluids; 2) electrokinetic processes resulting from the flow of ionic fluids; or 3) thermoelectric mechanisms from temperature gradients in the subsurface.
- Also Known As
- Spontaneous Potential
- Corwin, R.F. and Hoover, D.B. "The self-potential method in geothermal exploration." Geophysics. Vol. 44. No. 2 February, 1979: 226-245.
- Sharma, P.V. "Self-potential surveying." In Environmental and engineering geophysics, by P.V. Sharma, 190-206. Cambridge: Cambridge University Press, 2002.