Internship undertaken at the Nordic Volcanological Center
The Hengill area in south-west Iceland is the junction between two rift zones and a transform zone, within the Icelandic divergent plate boundary between North-America and Eurasia. It is an area of significant tectonic, geothermal and magmatic activity. In this study, GPS data from the Icelandic Geo...
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| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.465.4304 http://www.ipgp.fr/~dublanchet/Hengill.pdf |
| Summary: | The Hengill area in south-west Iceland is the junction between two rift zones and a transform zone, within the Icelandic divergent plate boundary between North-America and Eurasia. It is an area of significant tectonic, geothermal and magmatic activity. In this study, GPS data from the Icelandic Geosurvey (ISOR), collected in 2001, 2003 and 2005 as well as GPS campaign data from the Nordic Volcanological Center (University of Iceland) and continuous GPS measurements for the same period of observation are processed together using the Bernese GPS software Version 5.0 in order to get a velocity field at the Hengill triple junction. InSAR ENVISAT data acquired between 2005 and 2006 were processed using the Stanford Method for Persistent Scaterer (StaMPS) developed by Andy Hooper (Hooper et al., 2007), in order to get an idea of the vertical motion at the triple junction. Using the horizontal results of GPS, rate of strain over the area was calculated using the method described by Beaven et al., 2001. The deformation pattern over the area between 2001 and 2006 is mainly due to spreading within a divergent plate boundary and local deformation due to fluid extraction. Résumé Au niveau de la région du volcan Hengill dans le sud ouest de l’Islande, deux zones de rift et une zone transformante se rejoignent pour former un point triple dans la zone de divergence entre les plaques Nord Américaine et Eurasiatique. Cette région présente une activite ́ tectonique,magmatique et géothermique significative. Au cours de ce travail, des mesures GPS ef-fectuées par la sociéte ́ ”Icelandic Geosurvey ” en 2001, 2003 et 2005, des données de campagnes GPS effectuées par le ”Nordic Volcanological Cen-ter ” de l’universite ́ d’Islande ainsi que des enregistrements continus de GPS au cours de ces années ont éte ́ rassemblées afin d’obtenir un champs de déformation dans la région de Hengill. Des interferogrames InSAR formés à |
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