2008
DOI: 10.1016/j.epsl.2008.03.011
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Extensive perched aquifer and structural implications revealed by 3D resistivity mapping in a Galapagos volcano

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Cited by 63 publications
(36 citation statements)
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“…Although we have few constraints on groundwater hydrology of Sierra Negra, subsurface resistivity mapping of the upper ~ 2 km of Santa Cruz Island to the east reveals perched aquifers and saline incursions into the edifice, demonstrating the variable porosities and permeabilities of the layers. These studies also indicate that faults and/or impermeable dike zones control the structure of the edifice [ d ' Ozouville et al ., ]. By analogy, perched aquifers may occur on the southern, drip‐forest side of Sierra Negra and Cerro Volcanoes.…”
Section: Discussionmentioning
confidence: 99%
“…Although we have few constraints on groundwater hydrology of Sierra Negra, subsurface resistivity mapping of the upper ~ 2 km of Santa Cruz Island to the east reveals perched aquifers and saline incursions into the edifice, demonstrating the variable porosities and permeabilities of the layers. These studies also indicate that faults and/or impermeable dike zones control the structure of the edifice [ d ' Ozouville et al ., ]. By analogy, perched aquifers may occur on the southern, drip‐forest side of Sierra Negra and Cerro Volcanoes.…”
Section: Discussionmentioning
confidence: 99%
“…Several systems have been developed, measuring in the frequency-domain such as Resolve and DigHEM by Fugro Airborne Surveys (e.g. Mullen et al, 2007 andSiemon, 2009), and in the time-domain, such as SkyTEM (Sørensen and Auken, 2004) or VTEM by Geotech Airborne Inc. AEM surveys have been successfully conducted during the past decades for risk assessment and hydrogeological prospection in various geological contexts (Bosch et al, 2009;Mogi et al, 2009;Steuer et al, 2009;Supper et al, 2009;Viezzoli et al, 2010b), including volcanic (Auken et al, 2009b;Finn et al, 2001Finn et al, , 2007d'Ozouville et al, 2008). In most of the above-mentioned studies, geophysical data have been interpreted with a substantial set of drill hole and geological data available prior to the survey.…”
Section: A Pryet Et Al: Hydrogeological Settings Of a Volcanic Islamentioning
confidence: 99%
“…This is even more puzzling given the very long tradition of inductive methods in groundwater resources evaluations (e.g., Fitterman and Stewart, 1986;Tezkan, 1999;d'Ozouville et al, 2008). One possible reason relates to the success and flexibility of ERT for this type of applications (e.g., Kemna et al, 2002).…”
Section: Introductionmentioning
confidence: 99%