Study of the Chaves geothermal field using 3D resistivity modeling
1997; Elsevier BV; Volume: 37; Issue: 2 Linguagem: Inglês
10.1016/s0926-9851(97)00010-4
ISSN1879-1859
AutoresFernando A. Monteiro Santos, A. R. Andrade Afonso, L. A. Mendes Victor,
Tópico(s)Geological Modeling and Analysis
ResumoThe present paper deals with the 3D modeling of a resistivity data set, carried out over the Chaves graben where the hot springs, with a temperature reaching 78°C, have a great economic importance. The main objective of the modeling was to incorporate the partial knowledge obtained from previous ID and 2D interpretations into a three dimensional model. The 3D models of three rectangles and two dipole-dipole surveys, which were performed to detect conductive zones associated with the hydrothermal circulation, depict the general form of the graben and the spatial configuration of the low resistivity zones (10–15 μ m). The achieved models exhibit several characteristics similar to those of previous 1D and 2D interpretations and are consistent with geological information and new findings related to the bed-rock depth (1200 to 1500 m), the northern and southern borders of the conductive zones and its connection with the fault systems.
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