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http://hdl.handle.net/2445/163203
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DC Field | Value | Language |
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dc.contributor.author | Khazaradze, Giorgi | - |
dc.contributor.author | Klotz, J. | - |
dc.date.accessioned | 2020-05-30T06:12:27Z | - |
dc.date.available | 2020-05-30T06:12:27Z | - |
dc.date.issued | 2003 | - |
dc.identifier.issn | 0148-0227 | - |
dc.identifier.uri | http://hdl.handle.net/2445/163203 | - |
dc.description.abstract | In this study we present the contemporary crustal deformation field along the central and southern Andes (17-42\deg S) estimated from four Global Positioning System (GPS) campaigns conducted in 1994-97. We find that the majority of the observed crustal deformation field is relatively homogenous: roughly parallel to the plate convergence direction with decreasing velocities away from the trench. We attribute this type of deformation pattern to the inter-seismic phase of an earthquake deformation cycle caused by 100\% locking of the thrust interface between the subducting Nazca and the overriding South American plates. We have also detected a strong post-seismic deformation signal in the vicinity of the 1995 M$_w$8.0 Antofagasta (22-26\deg S) and 1960 M$_w$9.5 Chile (38-43\deg S) earthquakes. This type of deformation can be described as short-term in nature compared to geological timescales. The above conclusions are based on the results of the 3-D Andean Elastic Dislocation Model (AEDM). By subtracting the AEDM predicted deformation rates from the observations we obtained a residual velocity field, that highlights the post-seismic, as well as more long-term deformation effects. For example, we find a strong evidence for the continuing crustal shortening across the back-arc, reaching its maximum (4 mm/yr) in the very north of our study area. In addition, between latitudes 29-34\deg S, there is an indication of E-W oriented extension within the fore-arc, in accordance with the recent geologic findings for the N-S oriented normal faulting. | - |
dc.format.extent | 15 p. | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | - |
dc.publisher | Wiley | - |
dc.relation.isformatof | Reproducció del document publicat a: | - |
dc.relation.ispartof | Journal of Geophysical Research, 2003, vol. 108, num. B6, p. 2289-2306 | - |
dc.rights | (c) American Geophysical Union (AGU) , 2003 | - |
dc.source | Articles publicats en revistes (Dinàmica de la Terra i l'Oceà) | - |
dc.subject.classification | Subducció | - |
dc.subject.classification | Geodèsia | - |
dc.subject.classification | Andes | - |
dc.subject.other | Subduction | - |
dc.subject.other | Geodesy | - |
dc.subject.other | Andes | - |
dc.title | Short and long-term effects of GPS measured crustal deformation rates along the South-Central Andes | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 525265 | - |
dc.date.updated | 2020-05-30T06:12:27Z | - |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
Appears in Collections: | Articles publicats en revistes (Dinàmica de la Terra i l'Oceà) |
Files in This Item:
File | Description | Size | Format | |
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525265.pdf | 2.82 MB | Adobe PDF | View/Open |
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