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Titre : Plate Tectonics Type de document : Monographie Auteurs : Wolfgang Frisch, Auteur ; Martin Meschede, Auteur ; Ronald C. Blakey, Auteur Editeur : Berlin, Heidelberg, Vienne, New York, ... : Springer Année de publication : 2011 Importance : 220 p. ISBN/ISSN/EAN : 978-3-540-76504-2 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie
[Termes IGN] croute continentale
[Termes IGN] croute océanique
[Termes IGN] dorsale
[Termes IGN] lithosphère
[Termes IGN] orogenèse
[Termes IGN] séisme
[Termes IGN] tectonique des plaquesRésumé : (éditeur) How are mountains formed? Why are there old and young mountains? Why do the shapes of South America and Africa fit so well together? Why is the Pacific surrounded by a ring of volcanoes and earthquake-prone areas while the edges of the Atlantic are relatively peaceful? Frisch and Meschede and Blakey answer all these questions and more through the presentation and explanation of the geodynamic processes upon which the theory of continental drift is based and which have led to the concept of plate tectonics. Note de contenu : 1- Contractional theory, continental drift and plate tectonics
2- Plate movements and their geometric relationships
3- Continental graben structures
4- Passive continental margins and abyssal plains
5- Mid-ocean ridges
6- Hot spots
7- Subduction zones, island arcs and active continental margins
8- Transform faults
9- Terranes
10- Early Precambrian plate tectonics
11- Plate tectonics and mountain building
12- Old orogens
13- Young orogens – the Earth’s loftiest placesNuméro de notice : 25751 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Monographie En ligne : https://doi.org/10.1007/978-3-540-76504-2 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=94944 New insights on intraplate volcanism in French Polynesia from wavelet analysis of GRACE, CHAMP, and sea surface data / Isabelle Panet in Journal of geophysical research : Solid Earth, vol 111 n° B9 (September 2006)
[article]
Titre : New insights on intraplate volcanism in French Polynesia from wavelet analysis of GRACE, CHAMP, and sea surface data Type de document : Article/Communication Auteurs : Isabelle Panet , Auteur ; Aude Chambodut, Auteur ; Michel Diament , Auteur ; Matthias Holschneider, Auteur ; Olivier Jamet , Auteur Année de publication : 2006 Article en page(s) : 17 p. Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie physique
[Termes IGN] anomalie de pesanteur
[Termes IGN] champ de pesanteur local
[Termes IGN] Cook (îles)
[Termes IGN] croute océanique
[Termes IGN] données CHAMP
[Termes IGN] données GRACE
[Termes IGN] fond marin
[Termes IGN] Marquises, îles
[Termes IGN] ondelette
[Termes IGN] Polynésie française
[Termes IGN] Société, archipel de la (Polynésie française)
[Termes IGN] surface de la mer
[Termes IGN] Tuamotu, îles
[Termes IGN] volcanRésumé : (auteur) In this paper, we discuss the origin of superswell volcanism on the basis of representation and analysis of recent gravity and magnetic satellite data with wavelets in spherical geometry. We computed a refined gravity field in the south central Pacific based on the GRACE satellite GGM02S global gravity field and the KMS02 altimetric grid, and a magnetic anomaly field based on CHAMP data. The magnetic anomalies are marked by the magnetic lineation of the seafloor spreading and by a strong anomaly in the Tuamotu region, which we interpret as evidence for crustal thickening. We interpret our gravity field through a continuous wavelet analysis that allows to get a first idea of the internal density distribution. We also compute the continuous wavelet analysis of the bathymetric contribution to discriminate between deep and superficial sources. According to the gravity signature of the different chains as revealed by our analysis, various processes are at the origin of the volcanism in French Polynesia. As evidence, we show a large-scale anomaly over the Society Islands that we interpret as the gravity signature of a deeply anchored mantle plume. The gravity signature of the Cook-Austral chain indicates a complex origin which may involve deep processes. Finally, we discuss the particular location of the Marquesas chain as suggesting that the origin of the volcanism may interfere with secondary convection rolls or may be controlled by lithospheric weakness due to the regional stress field, or else related to the presence of the nearby Tuamotu plateau. Numéro de notice : A2006-305 Affiliation des auteurs : LAREG+Ext (1991-2011) Thématique : MATHEMATIQUE/POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1029/2005JB004141 Date de publication en ligne : 23/09/2006 En ligne : https://doi.org/10.1029/2005JB004141 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=96656
in Journal of geophysical research : Solid Earth > vol 111 n° B9 (September 2006) . - 17 p.[article]