Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/383
DC Field | Value | Language |
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dc.contributor.authorall | Finizola, A.; Laboratoire Magmas et Volcans, Université Blaise Pascal et CNRS, | en |
dc.contributor.authorall | Lénat, J. F.; Laboratoire Magmas et Volcans, Université Blaise Pascal et CNRS, | en |
dc.contributor.authorall | Macedo, O.; Instituto Geofisico del Peru, Perù | en |
dc.contributor.authorall | Ramos, D.; Instituto Geofisico del Peru, Perù | en |
dc.contributor.authorall | Thouret, J.-C.; Laboratoire Magmas et Volcans, Université Blaise Pascal et CNRS, | en |
dc.contributor.authorall | Sortino, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Palermo, Palermo, Italia | en |
dc.date.accessioned | 2005-09-05T13:07:29Z | en |
dc.date.available | 2005-09-05T13:07:29Z | en |
dc.date.issued | 2004 | en |
dc.identifier.uri | http://hdl.handle.net/2122/383 | en |
dc.description.abstract | One of the seven potentially active andesite stratovolcanoes in southern Peru, Misti (5822 m), located 17 km northeast and 3.5 km above Arequipa, represents a major threat to the population (f900,000 inhabitants). Our recent geophysical and geochemical research comprises an extensive self-potential (SP) data set, an audioâ magnetotelluric (AMT) profile across the volcano and CO2 concentrations in the soil along a radial profile. The SP survey is the first of its kind in providing a complete mapping of a large andesitic stratovolcano 20 km in diameter. The SP mapping enables us to analyze the SP signature associated with a subduction-related active volcano. The general SP pattern of Misti is similar to that of most volcanoes with a hydrogeologic zone in the lower flanks and a hydrothermal zone in the upper central area. A quasi-systematic relationship exists between SP and elevation. Zones with constant SP/altitude gradients (Ce) are observed in both hydrogeologic (negative Ce) and hydrothermal (positive Ce) zones. Transition zones between the different Ce zones, which form a concentric pattern around the summit, have been interpreted in terms of lateral heterogeneities in the lithology. The highest amplitudes of SP anomalies seem to coincide with highly resistive zones. The hydrothermal system 6 km in diameter, which extends over an area much larger than the summit caldera, may be constrained by an older, concealed collapse caldera. A sealed zone has apparently developed through alteration in the hydrothermal system, blocking the migration of CO2 upward. Significant CO2 emanations are thus observed on the lower flanks but are absent above the hydrothermal zone. | en |
dc.description.sponsorship | - Institut de Recherche pour le Developpement (IRD) - Instituto Geofısico del Peru´ (IGP) | en |
dc.format.extent | 539 bytes | en |
dc.format.extent | 1573969 bytes | en |
dc.format.mimetype | text/html | en |
dc.format.mimetype | application/pdf | en |
dc.language.iso | English | en |
dc.publisher.name | Elsevier | en |
dc.relation.ispartof | Journal of Volcanology and Geothermal Research | en |
dc.relation.ispartofseries | 135(2004) | en |
dc.subject | Misti volcano | en |
dc.subject | self-potential | en |
dc.subject | audioâ magnetotelluric | en |
dc.subject | electrical resistivity | en |
dc.subject | structural discontinuity | en |
dc.subject | hydrothermal system | en |
dc.subject | Peru | en |
dc.title | Fluid circulation and structural discontinuities inside Misti volcano (Peru) inferred from self-potential measurements | en |
dc.type | article | en |
dc.description.status | Published | en |
dc.type.QualityControl | Peer-reviewed | en |
dc.description.pagenumber | 343-360 | en |
dc.identifier.URL | http://www.sciencedirect.com/ | en |
dc.subject.INGV | 04. Solid Earth::04.08. Volcanology::04.08.01. Gases | en |
dc.subject.INGV | 04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring | en |
dc.subject.INGV | 04. Solid Earth::04.08. Volcanology::04.08.07. Instruments and techniques | en |
dc.identifier.doi | 10.1016/j.jvolgeores.2004.03.009 | en |
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Mapping thermal anomalies on an active volcano by the self-potential method, Kilauea, Hawaii. Proceedings, 2nd U.N. Symposium of the Development and Use of Geothermal Resources, San Francisco, California, May 1975, vol. 2. U.S. Govt. Printing Office, Washington, DC, pp. 1299â 1309. Zablocki, C.J., 1978. Streaming potentials resulting from the descent of meteoric water: a possible source mechanism for Kilauean self-potential anomalies. Geothermal energy: a novelty becomes resource. Geotherm. Resour. Counc., Davis, Calif. United States (USA), Hilo, Hawaii, United States, 747â 748. Zlotnicki, J., Boubon, G., Viodé, J.P., Delarue, J.F., Mille, A., Brue´re, F., 1998. Hydrothermal circulation beneath Mount Pelée inferred by self potential surveying. Structural and tectonic implications. J. Volcanol. Geotherm. Res. 84, 73â 91. | en |
dc.description.fulltext | partially_open | en |
dc.contributor.author | Finizola, A. | en |
dc.contributor.author | Lénat, J. F. | en |
dc.contributor.author | Macedo, O. | en |
dc.contributor.author | Ramos, D. | en |
dc.contributor.author | Thouret, J.-C. | en |
dc.contributor.author | Sortino, F. | en |
dc.contributor.department | Laboratoire Magmas et Volcans, Université Blaise Pascal et CNRS, | en |
dc.contributor.department | Laboratoire Magmas et Volcans, Université Blaise Pascal et CNRS, | en |
dc.contributor.department | Instituto Geofisico del Peru, Perù | en |
dc.contributor.department | Instituto Geofisico del Peru, Perù | en |
dc.contributor.department | Laboratoire Magmas et Volcans, Université Blaise Pascal et CNRS, | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione Palermo, Palermo, Italia | en |
item.openairetype | article | - |
item.cerifentitytype | Publications | - |
item.languageiso639-1 | en | - |
item.grantfulltext | restricted | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | Laboratoire Magmas et Volcans, OPGC, Université Blaise Pascal, CNRS, | - |
crisitem.author.dept | Instituto Geofisico del Peru, Perù | - |
crisitem.author.dept | Instituto Geofisico del Peru, Perù | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Palermo, Palermo, Italia | - |
crisitem.author.orcid | 0000-0002-5083-7349 | - |
crisitem.author.orcid | 0000-0002-2400-911X | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.classification.parent | 04. Solid Earth | - |
crisitem.classification.parent | 04. Solid Earth | - |
crisitem.classification.parent | 04. Solid Earth | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
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