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Journal articles
New geological and hydrogeological implications of the resistivity distribution inferred from audiomagnetotellurics over La Fournaise young shield volcano (Reunion Island)
Abstract : An audiomagnetotelluric survey has been performed along an inactive flank of La Fournaise volcano massif in Reunion island, to study the subsurface resistivity structure. One-dimensional modelling of the AMT data at each site revealed an extensive low-resistivity (less than 10 ω m) zone at a few hundred meters below the surface. The significance of this unexpected conductive substratum is discussed in relation with the proposed impact of volcano-tectonic processes (caldera and landslides collapses), and a new interpretation of the geological structure is proposed. Moreover, it is likely that these conductors are poorly permeable argilaceous materials; then they coincide with a limit in permeability and determine groundwater behavior.
https://hal.univ-reunion.fr/hal-02100580
Contributor : Réunion Univ <>
Submitted on : Tuesday, April 16, 2019 - 9:45:16 AM
Last modification on : Wednesday, November 11, 2020 - 3:05:12 AM
Contributor : Réunion Univ <>
Submitted on : Tuesday, April 16, 2019 - 9:45:16 AM
Last modification on : Wednesday, November 11, 2020 - 3:05:12 AM
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