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Termes IGN > sciences naturelles > sciences de la Terre et de l'univers > géosciences > géologie > tectonique > déformation de la croute terrestre
déformation de la croute terrestreSynonyme(s)mouvement de la croute terrestre déformation tectonique |
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Journées de la recherche IGN 2009 / Anonyme in Géomatique expert, n° 68 (01/04/2009)
[article]
Titre : Journées de la recherche IGN 2009 Type de document : Article/Communication Auteurs : Anonyme, Auteur Année de publication : 2009 Article en page(s) : pp 18 - 24 Langues : Français (fre) Descripteur : [Vedettes matières IGN] Géomatique
[Termes IGN] champ de pesanteur local
[Termes IGN] déformation de la croute terrestre
[Termes IGN] données lidar
[Termes IGN] généralisation cartographique automatisée
[Termes IGN] géodésie
[Termes IGN] milieu urbain
[Termes IGN] mise à jour de base de données
[Termes IGN] traitement d'imageRésumé : (Auteur) Comme chaque année, les " Journées de la recherche de l'IGN" se composaient de trois demi-journées, chacune consacrée à un laboratoire particulier. Copyright CiMax Numéro de notice : A2009-216 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29846
in Géomatique expert > n° 68 (01/04/2009) . - pp 18 - 24[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 265-09031 RAB Revue Centre de documentation En réserve L003 Disponible Projet et réalisation d'un SIG géophysique autour de composants libres : le catalogue des tremblements de terre de magnitude jusqu'à 5 / Anonyme in Géomatique expert, n° 68 (01/04/2009)
[article]
Titre : Projet et réalisation d'un SIG géophysique autour de composants libres : le catalogue des tremblements de terre de magnitude jusqu'à 5 Type de document : Article/Communication Auteurs : Anonyme, Auteur Année de publication : 2009 Article en page(s) : pp 60 - 63 Note générale : Bibliographie Langues : Français (fre) Descripteur : [Vedettes matières IGN] Cartographie thématique
[Termes IGN] bibliothèque logicielle
[Termes IGN] déformation de la croute terrestre
[Termes IGN] International Terrestrial Reference Frame
[Termes IGN] Open geospatial consortium
[Termes IGN] QGIS
[Termes IGN] séisme
[Termes IGN] système d'information géographique
[Termes IGN] tectonique des plaquesRésumé : (Auteur) Spatialiser et représenter cartographiquement l'épicentre des séismes et les frontières de plaque permet de vérifier un certain nombre d'hypothèses concernant la proximité spatiale et temporelle des tremblements de terre. Cet article expose l'essai de représentation cartographique des séismes de fortes magnitudes sous le logiciel libre QGis. Copyright CiMax Numéro de notice : A2009-221 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29851
in Géomatique expert > n° 68 (01/04/2009) . - pp 60 - 63[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 265-09031 RAB Revue Centre de documentation En réserve L003 Disponible The Al Hoceima (Morocco) earthquake of 24 February 2004: analysis and interpretation of data from ENVISAT ASAR and SPOT5 validated by ground-based observations / A. Tahayt in Remote sensing of environment, vol 113 n° 2 (16/02/2009)
[article]
Titre : The Al Hoceima (Morocco) earthquake of 24 February 2004: analysis and interpretation of data from ENVISAT ASAR and SPOT5 validated by ground-based observations Type de document : Article/Communication Auteurs : A. Tahayt, Auteur ; K. Feigl, Auteur ; et al., Auteur Année de publication : 2009 Article en page(s) : pp 306 - 316 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] données de terrain
[Termes IGN] faille géologique
[Termes IGN] image Envisat-ASAR
[Termes IGN] image SPOT 5
[Termes IGN] Maroc
[Termes IGN] séismeRésumé : (Auteur) The magnitude Mw=6.3 earthquake in Al Hoceima, Morocco of 24 February, 2004 occurred in the active plate boundary accommodating the oblique convergence between Africa and Eurasia. Three different sets of estimates of its source parameters have already been published. We try to resolve the discrepancies between them by using additional data including two remote sensing satellite systems (ENVISAT and SPOT5). Using a model with a dislocation in an elastic half-space, we constrain the source parameters. The hypothesis of two subevents on distinct faults as inferred from seismological inversions is confirmed here by adopting a cross-fault mechanism. The rupture began on a left-lateral strike-slip fault striking at N10° azimuth with 90 cm of horizontal slip and then transferred to a right-lateral strike-slip fault striking at N312° azimuth with 85 cm of horizontal slip. The first fault is at 500 m depth from the free surface and the second fault is at 3 km depth. This model is consistent with ground-based observations, including GPS, seismology, and mapped surface fissures. The pair of faults activated in 2004 appears to constitute part of a complex seismogenic structure striking NNE-SSW that separates the Rif tectonic blocks. Copyright Elsevier Numéro de notice : A2009-147 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.rse.2008.09.015 Date de publication en ligne : 28/11/2008 En ligne : https://doi.org/10.1016/j.rse.2008.09.015 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29777
in Remote sensing of environment > vol 113 n° 2 (16/02/2009) . - pp 306 - 316[article]Documents numériques
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A2009-147_tahayt.pdfAdobe Acrobat PDF A seafloor experiment to monitor vertical deformation at the Lucky Strike volcano, Mid-Atlantic Ridge / Marie-Noëlle Bouin in Journal of geodesy, vol 83 n° 2 (February 2009)
[article]
Titre : A seafloor experiment to monitor vertical deformation at the Lucky Strike volcano, Mid-Atlantic Ridge Type de document : Article/Communication Auteurs : Marie-Noëlle Bouin , Auteur ; V. Ballut, Auteur ; Jérôme Ammann, Auteur ; O. Pot, Auteur ; Olivier de Viron, Auteur ; et al., Auteur Année de publication : 2009 Article en page(s) : pp 147 - 159 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] Atlantique (océan)
[Termes IGN] déformation verticale de la croute terrestre
[Termes IGN] dorsale
[Termes IGN] fond marin
[Termes IGN] surveillance géologique
[Termes IGN] volcanRésumé : (Auteur) Decades of cruise-based exploration have provided excellent snapshots of the structure of mid-ocean ridges and have revealed that accretion is a mixture of steady-state and quantum events. Observatory-type studies are now needed to quantify the temporal evolution of these systems. A multi-disciplinary seafloor observatory site is currently being set up at the Lucky Strike volcano, in the axial valley of the slow spreading Mid-Atlantic ridge as a part of the MoMAR (monitoring of the Mid-Atlantic Ridge) initiative. The aim of this observatory is to better understand the dynamics of the volcano and the hydrothermal vents hosted at its summit as well as their plumbing systems. In August 2006, the GRAVILUCK cruise initiated an experiment to monitor the deformation of Lucky Strike volcano. A geodetic network was installed, and seafloor pressure, gravity and magnetic data were collected. In this paper, we present the method used to monitor volcanic deformation, which involves measuring relative depth difference between points within a seafloor geodesy network. We show that, taking into account oceanographic variability and measurement noise, the network should be able to detect vertical deformations of the order of 1 cm. Copyright Springer Numéro de notice : A2009-189 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-008-0248-3 En ligne : https://doi.org/10.1007/s00190-008-0248-3 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29819
in Journal of geodesy > vol 83 n° 2 (February 2009) . - pp 147 - 159[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 266-09021 SL Revue Centre de documentation Revues en salle Disponible Estimating sea floor dynamics in the southern North Sea to improve bathymetric survey planning / L. Dorst (2009)
Titre : Estimating sea floor dynamics in the southern North Sea to improve bathymetric survey planning Type de document : Thèse/HDR Auteurs : L. Dorst, Auteur Editeur : Delft : Netherlands Geodetic Commission NGC Année de publication : 2009 Collection : Netherlands Geodetic Commission Publications on Geodesy, ISSN 0165-1706 num. 69 Importance : 220 p. Format : 17 x 24 cm ISBN/ISSN/EAN : 978-90-6132-311-2 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bathymétrie
[Termes IGN] bathymétrie
[Termes IGN] covariance
[Termes IGN] déformation de la croute terrestre
[Termes IGN] fond marin
[Termes IGN] géodynamique
[Termes IGN] géostatistique
[Termes IGN] interpolation
[Termes IGN] krigeage
[Termes IGN] marée océanique
[Termes IGN] morphogenèse
[Termes IGN] nivellement indirect
[Termes IGN] Nord, mer du
[Termes IGN] océanographie dynamique
[Termes IGN] port
[Termes IGN] relèvement
[Termes IGN] Rotterdam (Pays-Bas)
[Termes IGN] sable
[Termes IGN] vagueIndex. décimale : 32.10 Bathymétrie Résumé : (Auteur) Safe nautical charts require a carefully designed bathymetric survey policy, especially in shallow sandy seas that potentially have dynamic sea floor patterns. Bathymetric resurveying at sea is a costly process with limited resources, though. A pattern on the sea floor known as tidal sand waves is clearly present in bathymetric surveys, endangering navigation in the Southern North Sea because of the potential dynamics of this pattern. An important factor in an efficient resurvey policy is the type and size of sea floor dynamics. The uncertainties of measurement and interpolation associated with the depth values enable the statistical processing of a time series of surveys, using deformation analysis. Currently, there is no procedure available that satisfies the Royal Netherlands Navy requirements. Therefore, a deformation analysis procedure is designed, implemented and tested in such a way that the procedure works on bathymetric data and satisfies the Royal Netherlands Navy requirements. Also, it is necessary to develop a procedure that translates the results into changes of the resurvey policy, taking into account their confidence intervals.
To describe the sea floor statistically, we assume the sea floor to consist of a spatial trend function (or characterization) and a residual function (or dispersion). Such a description is called a representation. The covariances between positions are expressed in a covariance function, based on the residual function. The covariance function is used by Kriging, an interpolation procedure that propagates the variances and covariances of the data points to variances of the interpolated values. This approach is used widely for spatial analyses, like the interpolation of a bathymetric data set.
The method that we propose uses Kriging to produce a time series of grids of depth values and their variances. Subsequently, it uses deformation analysis, a statistical procedure based on testing theory. Our application of deformation analysis is particularly aimed at the detection of dynamics in areas with tidal sand waves, resulting in parameter estimates for the sea floor dynamics, and their uncertainty. We apply the method to sea floor representations both with and without a sand wave pattern. A test scenario is set up, consisting of a survey of an existing area in the Southern North Sea, for which dynamics are simulated. The results show that the proposed method detects different types of sea floor dynamics well, leading to satisfactory estimates of the corresponding parameters.
We show results for the anchorage area Maas West near the Port of Rotterdam, the Netherlands first. The area is divided into 18 sub-areas. The results show that a sand wave pattern is detected for most of the sub-areas, and a shore-ward migration is detected for a majority of them. The estimated migration rates of the sand waves are up to 7.5 m/yr, with a 95% confidence interval that depends on the regularity of the pattern. The results are in confirmation with previously observed migration rates for the Southern North Sea, and with an idealized process-based model.
Thereafter, we analyze several other areas for which a time series of surveys is available in the bathymetric, archives of the Netherlands Hydrographic Service, to study the spatial variations in sea floor dynamics. We present results for several sand wave areas and a single flat area. In some of those areas, dredging takes place, to guarantee minimum depths. The results indicate sand wave migration in areas close to the coast, and bed level changes of the order of decimeters. The dominant wavelength of the sand waves varies. We compare our results to literature of the same sand wave areas, in which we find similar migration rates, and different wavelengths.
By formulating four indicators, recommendations are made for the resurvey policy on the Belgian and Netherlands Continental Shelf. These indicators follow from the estimates for sea floor dynamics. We present a concept for the shallowest likely depth surface, on which we base two of the indicators. The other two indicators act as a warning: they quantify the potentially missed dynamics, which makes the procedure more robust in case of complicated morphology. We show clear differences in recommended resurvey frequency between the five analyzed regions.
We conclude that the designed method is able to use a time series of bathy-metric surveys for the estimation of sea floor dynamics in a satisfactory way. Those dynamics may be present on the scale of the sea floor, it may be a local effect, or it may be due to a tidal sand wave pattern. Also, the results are successfully reduced to a set of four indicators, used to improve a resurvey policy. Based on these conclusions, we formulate recommendations on the extrapolation of the results in space and time, on potential adaptations to the designed procedure, and on implementation of the procedure.Note de contenu : Preface
1 Introduction
1.1 Nautical charting
1.2 Survey plan design
1.3 Detection of sea floor dynamics
1.4 Tidal sand waves
1.5 The uncertainty of depth measurements
1.6 Problem formulation
1.7 Research question and subquestions
1.8 Research strategy and outline
2 Bathymetric applications of Geostatistics
2.1 Introduction
2.2 Depth as a trend and its residuals
2.3 Covariance functions
2.4 Kriging
2.5 Conclusion
3 Estimating sea floor dynamics
3.1 Introduction
3.2 The method for the estimation of sea floor dynamics
3.3 Specification of a test scenario
3.4 Analysis results of a dynamic sea floor
3.5 Discussion
3.6 Conclusion
3.A Error characteristics
3.B Transformation of the sand wave parameters
3.C The application of statistical estimation and testing
4 The analysis of migrating tidal sand waves
4.1 Introduction
4.2 The application of deformation analysis
4.3 Results of the deformation analysis
4.4 Discussion of results
4.5 Conclusion
4.A Overview of used surveys
4.B Quantification of measurement errors
4.B.1 Covariance function of the error
4.B.2 Variances of the SEES surveys
4.B.3 Variances of the MBES survey
5 Spatial variations in sea floor dynamics
5.1 Introduction
5.2 Deformation analysis
5.3 The Selected Track region: little dynamics
5.4 The Noordhinder region: comparison with other methods
5.5 The region West of IJmuiden: sand wave migration
5.6 The region North of Terschelling: a flat sea floor
5.7 Discussion
5.8 Conclusion
5.A Overview of used surveys
6 Application to the resurvey policy
6.1 Introduction
6.2 Background: Hydrographic practice
6.3 Method: indicators of sea floor dynamicsNuméro de notice : 15495 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Thèse étrangère DOI : sans En ligne : https://www.ncgeo.nl/downloads/69Dorst.pdf Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=62737 Réservation
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