RT Journal Article
T1 Aplicación de la tomografía eléctrica a la prospección de formaciones evaporíticas
T1 Prospection of evaporite formations with electric imaging
A1 Lugo, E.
A1 Playà, Elisabet
A1 Rivero, Luis
AB The electric imaging permits to obtain a model of the subsurface materials on the basis of the vertical andhorizontal resistivity changes along the tomographic profile. The final result, after the processing of theinitialy measured apparent resistivity, is a 2D profile that shows the real resistivity of the subsurface; it canbe interpreted in geological terms, given that resistivity changes are mainly due to the lithological andwater contents variations.Electric imaging has been used in the study of evaporitic formations (gypsum and anhydrite). Differences ofresisivity between gypsum (CaSO4·2H2O) and anhydrite (CaSO4) are due to the presence of hydration waterin gypsum rocks; the levels of water molecules in the mineral structure operate as conductive levels. Thus,anhydrite is expected to be more resistive than gypsum. The tomographic profiles fit the interval of gypsumresistivities between 80 and 1000 W m, whereas the anhydrite display higher values, from 1000 to 11500m.The ranges of resistivities will depend on the degree of transformation of the anhydrite rock to gypsum.The use of the electric imaging in prospection of evaporite (calcium sulphate) formations with possibleeconomical interest is proposed. This technique is non destructive and comparatively less expensive thanclassical methods (drilling)
YR 2008
FD 2008
LK http://hdl.handle.net/10272/8215
UL http://hdl.handle.net/10272/8215
LA spa
DS Repositorio Institucional de la Universidad de Huelva
RD 1 jun 2026