Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/7414
DC Field | Value | Language |
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dc.contributor.authorall | Scarfì, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Catania, Catania, Italia | en |
dc.contributor.authorall | Raffaele, R.; Dipartimento di Scienze Geologiche, Università di Catania, Italy | en |
dc.contributor.authorall | Badi, G.; Facultad de Ciencias Astronómicas y Geofisicas, Universidad Nacional de La Plata, La Plata, Argentina | en |
dc.contributor.authorall | Ibanez, J. M.; Instituto Andaluz de Geofisica, Universidad de Granada, Granada, Spain | en |
dc.contributor.authorall | Imposa, S.; Dipartimento di Scienze Geologiche, Università di Catania, Italy | en |
dc.contributor.editorall | EAGE - European association of geoscientists & engineers | en |
dc.date.accessioned | 2012-01-19T10:06:40Z | en |
dc.date.available | 2012-01-19T10:06:40Z | en |
dc.date.issued | 2012-04-04 | en |
dc.identifier.uri | http://hdl.handle.net/2122/7414 | en |
dc.description.abstract | A local seismic network, operating in western Argentina from 28°S to 33 °S, between August 1995 and January 1999, recorded more than 450 earthquakes. In this region, the geodynamic is controlled by the subduction of the Nazca plate beneath the South American lithosphere, which is characterised here by a sub-horizontal path before reassuming its downward descent. As accurate earthquake locations are of primary importance when studying the seismicity of a given area, events recorded by the local seismic network enable in-depth investigations into seismotectonic patterns, allowing us to improve the earthquake source characterization and the knowledge on the ongoing seismo-tectonics of the region. With this aim, we performed a simultaneous inversion of both the velocity structure and the hypocentre location. The obtained velocity images highlight vertical and lateral heterogeneities which, together with the distribution of the relocated events, can be associated with the main tectonic structures in the crust of the western Sierra Pampeanas region. The study also provided new constraints on the geometry of the subducted slab. We noted a great concentration of shallower seismicity with respect to that of the surrounding areas at the expected position of the Juan Fernandez Ridge, which certainly influences the subduction style along its strike, leading to the formation of a bent in the slab geometry. | en |
dc.language.iso | English | en |
dc.relation.ispartof | Geosciences: Making the most of the Earth’s resources | en |
dc.subject | Seismic tomography | en |
dc.subject | high precision earthquake location | en |
dc.subject | seismogenic structure | en |
dc.subject | flat-slab subduction | en |
dc.title | Seismicity and Crustal Velocity Structure of the Southern Central Andes - Western Argentina | en |
dc.type | Extended abstract | en |
dc.description.status | Submitted | en |
dc.subject.INGV | 04. Solid Earth::04.07. Tectonophysics::04.07.02. Geodynamics | en |
dc.description.ConferenceLocation | San Pietroburgo | en |
dc.relation.references | Alvarado, P., Beck, S., Zandt, G., Araujo, M., Triep, E. 2005 Crustal deformation in the south-central Andes backarc terranes as viewed from regional broad-band seismic waveform modeling. Geophysical Journal International, 163, 580-598. Anderson, M., Alvarado, P., Zandt, G., Beck, S. 2007 Geometry and brittle deformation of the subducting Nazca Plate, Central Chile and Argentina. Geophysical Journal International, 171, 419-434. Bohm, M., Luth, S., Echtler, H., Asch, G., Bataille, K., Bruhn, C., Rietbrock, A., Wigger, P. 2002 The Southern Andes between 36° and 40°S latitude: seismicity and average seismic velocities. Tectonophysics, 356, 275-289. Cahill, T. and Isacks, B.L. 1992 Seismicity and shape of the subducted Nazca plate. Journal of Geophysical Research, 97, 17,503-17,529. Fromm, R., Zandt, G., Beck, S.L. 2004 Crustal thickness beneath the Andes and Sierras Pampeanas at 30°S inferred from Pn apparent phase velocities. Geophysical Research Letters, 31(L006625), doi:10.1029/2003GL019231. Kissling, E. 1995 Velest User’s Guide. Int. Report, Inst. Geophys., ETH, Zurich, 1-26. Ramos, V.A., Cristallini, E.O., Pérez, D.J. 2002 The Pampean flat-slab of the central Andes. Journal of South American Earth Sciences, 15, 59-78. Siame, L.L., Bellier, O., Sébrier, M. 2006 Active tectonics in the Argentina Precordillera and Western Sierra Pampeanas. Revista de la Associacion Geologica Argentina, 61, 604-619. Thurber, C.H. 1983 Earthquake locations and three dimensional crustal velocity structure in the Coyote lake area, central California. Journal of Geophysical Research, 88, 8226–8236. | en |
dc.description.obiettivoSpecifico | 3.2. Tettonica attiva | en |
dc.description.fulltext | open | en |
dc.contributor.author | Scarfì, L. | en |
dc.contributor.author | Raffaele, R. | en |
dc.contributor.author | Badi, G. | en |
dc.contributor.author | Ibanez, J. M. | en |
dc.contributor.author | Imposa, S. | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OE, Catania, Italia | en |
dc.contributor.department | Dipartimento di Scienze Geologiche, Università di Catania, Italy | en |
dc.contributor.department | Facultad de Ciencias Astronómicas y Geofisicas, Universidad Nacional de La Plata, La Plata, Argentina | en |
dc.contributor.department | Instituto Andaluz de Geofisica, Universidad de Granada, Granada, Spain | en |
dc.contributor.department | Dipartimento di Scienze Geologiche, Università di Catania, Italy | en |
item.openairetype | Extended abstract | - |
item.cerifentitytype | Publications | - |
item.languageiso639-1 | en | - |
item.grantfulltext | open | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OE, Catania, Italia | - |
crisitem.author.dept | Dipartimento di Scienze Geologiche, Università di Catania, Italy | - |
crisitem.author.dept | Facultad de Astronomía y Geofísica, Universidad Nacional de La Plata, Argentina | - |
crisitem.author.dept | Instituto Andaluz de Geofísica, University of Granada, Granada, Spain, | - |
crisitem.author.dept | Dipartimento di Scienze Geologiche, Università di Catania, Italy | - |
crisitem.author.orcid | 0000-0002-5995-3880 | - |
crisitem.author.orcid | 0000-0002-9846-8781 | - |
crisitem.author.orcid | 0000-0003-1738-1850 | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.classification.parent | 04. Solid Earth | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
Appears in Collections: | Conference materials |
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File | Description | Size | Format | |
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2012_sanpietroburgo.doc | extended abstract | 1.86 MB | Microsoft Word | View/Open |
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