Manioc : Portail | resultats 121 - 140 pour la recherche: volcan

Le sommet de la Montagne Pelée en 1936, vu d'un avion.
Auteur(s) : Frolow, S.

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Basse-Pointe. Maisons ensevelies sous les apports de la rivière, après la catastrophe de 1902
Auteur(s) : Benoit-Jeanette, A.
Année de publication :

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Première victime de l'éruption de 1929. Ce chien, en traversant l'embouchure de la Rivière-Blanche remplies de cendres chaudes au lendemain du passage d'une nuée ardente ( 21-11-29), s'est brûlé aux pattes et au ventre. Il est mort 24 heures après
Auteur(s) : Sully fils
Année de publication :

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Le cratère vue du sud
Auteur(s) : Hess, Jean (1862-1926)

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Le cratère vue du sud-ouest
Auteur(s) : Hess, Jean (1862-1926)

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Vue de Port Saint-Pierre (Martinique)

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Structure and development of the southeast Newfoundland continental passive margin: derived from SCREECH Transect 3
Auteur(s) : Deemer, Sharon Hall, Jeremy Solvason, Krista Lau, K. W. Helen Louden, Keith Srivastava, Shiri Sibuet, Jean-claude

Éditeur(s) : Wiley / Blackwell
Résumé : P>New seismic reflection data from the Grand Banks of Newfoundland and the Newfoundland Basin add to the growing knowledge of the composition, structure and history of this non-volcanic margin. Geophysical imaging is now approaching the extent of that done previously on the conjugate margin along Iberia, providing a valuable database for the development of rifting models. Two parallel profiles over the shelf platform image deep crustal fabric representing Precambrian or possibly Appalachian deformation as well as Mesozoic extension. Progressively more intense extension of continental crust is imaged oceanwards without the highly reflective detachments frequently seen on profiles off Galicia. A landward-dipping event 'L' is imaged sporadically and appears to be analogous to a similar event on the Iberian IAM9 profile. The transition zone is probably exposed serpentinized mantle as interpreted off the Iberian margin although there appears to be a difference in the character of ridge development and reflectivity. The distinctive 'U' reflection identified previously at the base of the Newfoundland Basin deep water sedimentary section and recently identified as one or more thin basalt sills is imaged on newly presented profiles that connect previously published profiles SCR3 and SCR2 showing that 'U' is highly regular and continuous except where interrupted by basement highs. 'U' is also seen to have a major impact on the ability to image underlying basement. A full transect beginning over completely unextended continental crust through to oceanic crust has provided a data set from which estimates of extension and the pre-rifting location of the present continental edge can be made. Two estimates were obtained; 85 km based on faulting and 120 km based on crustal thickness.
Geophysical Journal International (0956-540X) (Wiley / Blackwell), 2009-08 , Vol. 178 , N. 2 , P. 1004-1020

Droits : 2009 Wiley / Blackwell
http://archimer.ifremer.fr/doc/2009/publication-6919.pdf
DOI:10.1111/j.1365-246X.2009.04162.x
http://archimer.ifremer.fr/doc/00000/6919/

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Volcan de Jorullo
Auteur(s) : Bouquet

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Carte de la partie nord de la Martinique. Zone de dévastation du volcan

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Eruption volcanique de la Montagne Pelèe

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Tectonic context of moderate to large historical earthquakes in the Lesser Antilles and mechanical coupling with volcanoes
Auteur(s) : Feuillet, Nathalie Beauducel, Francois Tapponnier, Paul

Éditeur(s) : Amer Geophysical Union
Résumé : The oblique convergence between North American and Caribbean plates is accommodated in a bookshelf faulting manner by active, oblique-normal faults in the northern part of the Lesser Antilles arc. In the last 20 years, two M > 6 earthquakes occurred along a large, arc parallel, en echelon fault system, the 16 March 1985 in Redonda and 21 November 2004 in Les Saintes. A better understanding of active faulting in this region permit us to review the location and magnitude of historical earthquakes by using a regional seismic attenuation law. Several others moderate earthquakes may have occurred along the en echelon fault system implying a strong seismic hazard along the arc. These faults control the effusion of volcanic products and some earthquakes seem to be correlated in time with volcanic unrest. Shallow earthquakes on intraplate faults induced normal stress and pressure changes around neighboring volcano and may have triggered volcanic activity. The Redonda earthquake could have initiated the 1995 eruption of Montserrat's Soufriere Hills by compressing its plumbing system. Conversely, pressure changes under the volcano increased Coulomb stress changes and brought some faults closer to failure, promoting seismicity. We also discuss the magnitude of the largest 11 January 1839 and 8 February 1843 megathrust interplate earthquakes. We calculate that they have increased the stress on some overriding intraplate faults and the extensional strain beneath several volcanoes. This may explain an increase of volcanic and seismic activity in the second half of the 19th century culminating with the devastating, 1902 Mount Pelee eruption.
Journal Of Geophysical Research-solid Earth (0148-0227) (Amer Geophysical Union), 2011-10 , Vol. 116 , N. B10308 , P. 1-26

Droits : Copyright 2011 by the American Geophysical Union
http://archimer.ifremer.fr/doc/00200/31097/29515.pdf
DOI:10.1029/2011JB008443
http://archimer.ifremer.fr/doc/00200/31097/

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