Content area

Abstract

EM34 and SP surveys were used to delineate shallow structures associated with the mineral water springs in the Vilarelho da Raia area located NE Portugal. This spring is part of a set of CO2-rich mineral (hot and cold) waters connected to the main Hercynian NNE-SSW fault systems. The EM34 survey was interpreted using a quasi-three-dimensional inversion approach based on a smooth-regularisation algorithm. The model put into evidence the conductive overburden as well as the fractured granitic formation. A preliminary estimation of the aquifer porosity is made based on the EM34 model. The SP anomalies were interpreted considering as having their sources on the aquifer interfaces. The modelling of two SP profiles allow the characterisation of a fault connected to the spring.

Details

Title
A hydrogeological investigation using EM34 and SP surveys
Author
Santos, Fernando A. Monteiro 1 ; Almeida, Eugénio P. 2 ; Castro, R. 1 ; Nolasco, R. 1 ; Mendes-Victor, Luís 1 

1  Centro de Geofísica da Universidade de Lisboa, Departamento de Física, Lisboa, Portugal (GRID:grid.9983.b) (ISNI:0000000121814263) 
2  Centro de Geofísica da Universidade de Lisboa, Departamento de Física, Lisboa, Portugal (GRID:grid.9983.b) (ISNI:0000000121814263); Instituto Politécnico de Tomar, Tomar, Portugal (GRID:grid.421291.d) (ISNI:0000000122225620) 
Pages
655-662
Publication year
2002
Publication date
May 2002
Publisher
Springer Nature B.V.
e-ISSN
18805981
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1186/BF03353053
ProQuest document ID
2928468408
Copyright
© The Society of Geomagnetism and Earth, Planetary and Space Sciences (SGEPSS); The Seismological Society of Japan; The Volcanological Society of Japan; The Geodetic Society of Japan; The Japanese Society for Planetary Sciences. 2002.