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Recent crustal deformation and strain accumulation in the Marmara sea region, NW Anatolia, inferred from GPS measurements / Christian Straub (1996)
Titre : Recent crustal deformation and strain accumulation in the Marmara sea region, NW Anatolia, inferred from GPS measurements Type de document : Thèse/HDR Auteurs : Christian Straub, Auteur Editeur : Zurich : Institut für Geodäsie und Photogrammetrie IGP - ETH Année de publication : 1996 Collection : IGP Mitteilungen, ISSN 0252-9335 num. 058 Importance : 150 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-906513-82-9 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] analyse comparative
[Termes IGN] campagne GPS
[Termes IGN] déformation de la croute terrestre
[Termes IGN] données GPS
[Termes IGN] Marmara, mer de
[Termes IGN] positionnement par GPS
[Termes IGN] risque naturel
[Termes IGN] séismeIndex. décimale : 30.82 Applications géophysiques de géodésie spatiale Résumé : (auteur) This work analyzes recent crustal deformation in the Marmara Sea region, NW Anatolia, based on data derived from repeated GPS measurements. It is the geodetic part of the MARMARA poly-project of the Swiss Federal Institute of Technology (ETHZ). The overall goal of the Marmara poly-project is to examine the active tectonics and their interaction with groundwater circulation, heat flow and seismicity in northwestern Anatolia. In 1990, the Geodesy and Geodynamics Lab. (GGL) of the ETHZ established 52 GPS sites at the western end of the single strand North Anatolian Fault Zone (NAFZ) and its splaying into a complex fault system. This complexity is caused by the transition from the east-west oriented motion of the Anatolian block to the extensional regime of the Aegean Sea directing north-south. The GPS sites were occupied during three major GPS campaigns in 1990, 1992, and 1994. The GPS data were analyzed using the Bernese GPS Software. As a result of the combination of these campaigns a detailed velocity field of the transition zone between the westward motion of Anatolia and the extending Aegean Sea was obtained. The average rate of motion of Anatolia relative to Eurasia is 20 mm/a in a W direction. West of longitude 27.5°, the average direction of motion turns from W to WSW. From north to south, a gradual rate increase from 0 to 20 mm/a was found. Comparisons with deformation rates derived from the summation of seismic moment tensors suggest that less than 60% of the GPS inferred rates are released by earthquakes. The deformation rates are evaluated by means of strain and stress analysis, by using the method of collocation, examination of residuals relative to rigid Eulerian rotations, as well as a Finite Element model of the Marmara Sea region. Most deformation occurs along the northern strand of the NAFZ that runs from Mudurnu through the Gulf of izmit, passing the Marmara Sea, re-enters the Eurasian mainland and continuing to the Gulf of Saros. The Yalova peninsula endures considerable deformation as well. No significant deformation was found on the Biga peninsula. Thus, the western part of the middle strand that crosses the Biga peninsula is either inactive or locked. The Gulf of Edremit and the areas south of it are occupied by extensional processes in NNE-SSW direction (max. extension: 0.3 ppm/a [= u.strain/a]). The average shear-strain rate in the Marmara Sea region is 0.1 ppm/a (maximum shear: 0.3 ppm/a). The highest annual accumulation of density of strain energy (4 mJ/m3) and maximum shear stress (16 kN/m2) is located along the northern strand. The projection of the strain on the main fault allows us to determine the kind and amount of faulting that can be expected at individual fault lines. The dextral strike along the northern strand reaches 0.1-0.3 ppm/a. The results obtained from repeated GPS measurements compare well with the pattern of horizontal direction of major extension derived from seismotectonic and neotectonic data. In the East, the major horizontal extension directs NE-SW. Further to the west it gradually changes to almost N-S. Comparisons with rigid pole rotations for the Eastern Mediterranean, postulated by other authors, show that the Marmara region cannot be regarded as part of a rigid Anatolian block. The analysis of residuals to a rigid pole rotation of the Anatolian sites of the MARMARA GPS network (33.9°N, 29.8°E, CD=1.36°/Ma) depicts the location and size of the area of the main deformation. Cross-sectors radial to the best fitting pole reveal a detailed pattern of increase of deformation rates over the different fault lines. The deformation zones in the eastern and western part is narrow (=45 km). The zone for the middle sector undergoes a more distributed deformation (up to 100 km). The investigation of the radial residuals illustrates the overall extension of the Marmara region directing NE-SW. Finite Element calculations (2D, elasto-static) confirm the findings of the strain and stress analysis. Furthermore, they suggest that the known neotectonic fault geometry is capable of absorbing a considerable accumulation of distortion. However, the Finite Element model also gives indications for additional fault structures at the western end of the Marmara Sea and in Thrace, north and south of the northern strand striking subparallel to it. Finally, the strain field of the Eastern Mediterranean region is derived from GPS measurements spanning the whole region. The deformation pattern confirm the strong dextral motion along the NAFZ (0.2 ppm/a) as well as the extensional regimes of Western Anatolia and the Aegean Sea. Residuals from a rotation for the Eastern Mediterranean reveal that the Anatolian/Aegean region does not behave like a single rigid plate. The rates along the NAFZ show that there is a zone with a width of up to 100 km that endures strong internal deformation. The southern Aegean, Western, and Southwestern Greece do not fit to a simple rigid polar rotation at all. Numéro de notice : 68913 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Thèse étrangère DOI : 10.3929/ethz-a-001624667 En ligne : http://dx.doi.org/10.3929/ethz-a-001624667 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=64059 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 68913-01 30.82 Livre Centre de documentation Géodésie Disponible
Titre : Satellite geodesy and geodynamics : current deformation along the West Hellenic arc Type de document : Thèse/HDR Auteurs : Max Vinzenz Muller, Auteur Editeur : Zurich : Institut für Geodäsie und Photogrammetrie IGP - ETH Année de publication : 1996 Collection : IGP Mitteilungen, ISSN 0252-9335 num. 057 Importance : 126 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-906513-80-5 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] déformation de la croute terrestre
[Termes IGN] données GPS
[Termes IGN] géophysique interne
[Termes IGN] Grèce
[Termes IGN] Méditerranée, mer
[Termes IGN] modèle géologique
[Termes IGN] positionnement par GPS
[Termes IGN] risque naturel
[Termes IGN] séismeIndex. décimale : 30.82 Applications géophysiques de géodésie spatiale Résumé : (Auteur) The geodynamic processes in the Mediterranean area are reflected in the recent crustal movements determined by satellite geodesy. There is a counterclockwise rotation of Africa relative to Eurasia, with complex deformation in between. A key feature to a better understanding of the driving forces and associated seismic activity in the Africa/Eurasia collision zone is the Hellenic Arc. This thesis reports on repeated GPS measurements, that began in 1989, along the western coast of Greece (including some stations in southern Italy). The results are presented in terms of relative displacements and strain rates. They reveal distinct crustal motion of the central Ionian Islands and SW Greece: Over a time span of five years various parts of Greece have moved to the SW at a rate of -40 mm/a relative to SE Italy and Epiros. The trajectories constructed from the repeated observations show that the boundary zone, against the sites of no significant motion relative to South Italy, coincides with the Kephalonia fault zone (KFZ) where a maximum of strain energy density was also found. The maximum strain rate is 0.18 µstrain/a, located in the vicinity of Lefkada. where anomalously high earthquake activity is observed. This intense deformation accounts for the earthquakes that have frequently devastated the Central Ionian Islands. The deformation field of the KFZ is interpreted as a transition zone between the kinematics of the Eurasian and the Aegean/Anatolian plates (Hellenic fold and thrust belts). Seismic risk assessment is one important application of geodetically-determined strain rates. This thesis also includes an approach for approximating the observed displacement field by the use of a tectonic model for the area of investigation. Numéro de notice : 56231 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Thèse étrangère DOI : 10.3929/ethz-a-001584904 En ligne : http://dx.doi.org/10.3929/ethz-a-001584904 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=59994 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 56231-01 30.82 Livre Centre de documentation Géodésie Disponible 56231-02 30.82 Livre Centre de documentation Géodésie Disponible SIG et évaluation des risques naturels : application aux risques sismiques de Quito / J.L. Chatelain in Mappemonde, vol 1995 n° 3 (septembre 1995)
[article]
Titre : SIG et évaluation des risques naturels : application aux risques sismiques de Quito Type de document : Article/Communication Auteurs : J.L. Chatelain, Auteur ; B. Guillier, Auteur ; M. Souris, Auteur ; E. Duperier, Auteur ; H. Yepes, Auteur Année de publication : 1995 Article en page(s) : pp 17 - 22 Note générale : Bibliographie Langues : Français (fre) Descripteur : [Vedettes matières IGN] Systèmes d'information géographique
[Termes IGN] atlas numérique
[Termes IGN] base de données urbaines
[Termes IGN] Quito (Equateur)
[Termes IGN] risque naturel
[Termes IGN] sismologie
[Termes IGN] système d'information géographique
[Termes IGN] ville
[Termes IGN] vulnérabilitéRésumé : (Editeur) L'article retrace rapidement les principales étapes de la réalisation d'un scénario sismique sur la ville de Quito. Les croisements nécessaires entre les données venant de domaines variés (sciences de la terre, ingénièrie civile, sociodémographie) ont pu être effectués rapidement grâce à l'utilisation du SIG Savane. Le SIG a permis l'édition de documents graphiques décrivant de façon concrète la vulnérabilité sismique de la ville, facilitant ainsi la prise de conscience des responsables politiques et économiques. Numéro de notice : A1995-066 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : sans En ligne : http://www.mgm.fr/PUB/Mappemonde/M395/QUITO.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=25753
in Mappemonde > vol 1995 n° 3 (septembre 1995) . - pp 17 - 22[article]1995 Fall Meeting AGU / American Geophysical Union (1995)
Titre : 1995 Fall Meeting AGU Type de document : Actes de congrès Auteurs : American Geophysical Union, Auteur Editeur : Washington DC [Maryland - Etats-Unis] : American Geophysical Union AGU Année de publication : 1995 Conférence : AGU 1995, Fall Meeting 11/12/1995 15/12/1995 San Francisco Californie - Etats-Unis Importance : 760 p. Format : 21 x 30 cm Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géophysique interne
[Termes IGN] géodésie
[Termes IGN] hydrologie
[Termes IGN] océan
[Termes IGN] sismologieNuméro de notice : 68701 Affiliation des auteurs : non IGN Nature : Résumé de communications Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=44756 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 68701-01 CG.95 Livre Centre de documentation Congrès Disponible 1995 Spring Meeting AGU / American Geophysical Union (1995)
Titre : 1995 Spring Meeting AGU Type de document : Actes de congrès Auteurs : American Geophysical Union, Auteur Editeur : Washington DC [Maryland - Etats-Unis] : American Geophysical Union AGU Année de publication : 1995 Conférence : AGU 1995, Spring Meeting 30/05/1995 02/06/1995 Baltimore Maryland - Etats-Unis Importance : 331 p. Format : 21 x 30 cm Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géophysique interne
[Termes IGN] atmosphère terrestre
[Termes IGN] géodésie
[Termes IGN] hydrologie
[Termes IGN] minéralogie
[Termes IGN] sismologieNuméro de notice : 68702 Affiliation des auteurs : non IGN Nature : Résumé de communications Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=44757 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 68702-01 CG.95 Livre Centre de documentation Congrès Disponible Contributions in dynamics of the solid Earth and other planets / American Geophysical Union (1995)PermalinkEnvironmental assessment of geological hazards / European space report (1995)PermalinkGeographical Information Systems in assessing natural hazards / A. Carrara (1995)PermalinkProceedings of the workshop Dynamical systems and artificial intelligence applied to data banks in geophysics / J. Bonnin (1995)PermalinkRapport quadriennal 1991-1994 [du] CNFGG [à la] 21ème assemblée générale de l'Union Géodésique et Géophysiques Internationale / M. Munschy (1995)PermalinkAdéquation des techniques de positionnement par GPS aux études sismiques 3D terrestres / B. Berton (1994)PermalinkJournées Luxembourgeoises de Géodynamique / Olivier Francis (1994)PermalinkProceedings of the eighth international symposium on recent crustal movements (CRCM'93) / R. Shichi (1994)PermalinkEuropean macroseismic scale 1992 (up-dated MSK-SCALE) / G. Grunthal (1993)PermalinkJournées Luxembourgeoises de Géodynamique / C. Poitevin (1993)PermalinkJournées luxembourgeoises de géodynamique, 73ème session / C. Poitevin (1992)PermalinkZur Analyse rezenter Krustenbewegungen bei Vorliegen seismotektonischer Dislokationen / N. Kersting (1992)PermalinkRapport Quadriennal 1987-1990 [du] CNFGG [à la] 20e assemblée générale de l'Union Géodésique et Géophysique / Comité national français de géodésie et géophysique (1991)PermalinkProbabilities of large earthquakes in the San Francisco bay region, California by working group on California earthquake probabilities / Department of the interior (1990)PermalinkUpdating regional geology of the south central Alborz mountains of Iran based on Landsat digital data / S. Bagheri in Geocarto international, vol 4 n° 2 (June - August 1989)PermalinkDeux nouveautés dans le domaine des études de sol en mer / M. Bourgeois in XYZ, n° 38 (mars - mai 1989)PermalinkSymposium on recent crustal movements / Geodetic society of Japan (1989)PermalinkStructural geology and regional tectonics of the mineral county area, Nevada, using Shuttle-Imaging-Radar-B and digital aeromagnetic data / M.X. Borengasser in International Journal of Remote Sensing IJRS, vol 9 n° 5 (May 1988)PermalinkAplicaciones de la teledetección (foto-satélite) / L.M. Martinez-Torres (1988)PermalinkStructure et cinématique d'une chaine de collision, les Alpes occidentales et centrales / G. Menard (1988)Permalink