Coupes sismiques des structures superficielles dans les petites antilles—I: Guadeloupe

Dorel, J.; Eschenbrenner, S.; Feuillard, M.

doi:10.1007/bf00876085

Cited by 17 publications

(21 citation statements)

References 4 publications

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“…7a [Dorel et al, 1979]). Along these profiles, an interpretation in three seismic layers was proposed ( fig.…”

Section: Geophysical Constraintsmentioning

confidence: 95%

“…8 and 9) The first modeled cross section ( fig. 8) corresponds to the refraction seismic profile C [Dorel et al, 1979; fig. 7], oriented E-W, and crossing Basse-Terre and Grande-Terre islands.…”

Section: Quantitative Interpretation Of the Main Geophysical Anomaliesmentioning

confidence: 99%

“…The second also oriented E-W ( fig. 9) is collocated with the refraction seismic profile A south of Basse-Terre [Dorel et al, 1979; fig. 7 7. -Location of the seismic velocity models across Guadeloupe Island and seismic velocity distribution in depth according to Dorel et al [1979].…”

Section: Quantitative Interpretation Of the Main Geophysical Anomaliesmentioning

confidence: 99%

“…The models have been built from the residual gravity anomaly, for which, as previously mentioned, the influence of the deep crustal structures was mostly removed. As a consequence, the base of our models has been fixed to -6 km in order to take into account the upper part of the oceanic crust at depth according to seismic refraction studies [Dorel et al, 1979]. In order to strengthen the model, we have jointly modeled the RTP magnetic signal along the same profiles.…”

Section: Quantitative Interpretation Of the Main Geophysical Anomaliesmentioning

confidence: 99%

“…Since the 1970's, a substantial amount of work has been carried out to study the islands of Guadeloupe [e.g. Coron et al, 1975;LeBorgne and LeMouël, 1976;Dorel et al, 1979;Le Mouël et al, 1979;Grellet et al, 1988;Gunawan, 2005;Calcagno et al, 2011;Mathieu et al, 2011;Lardeaux et al, 2013;Münch et al, 2013] and also the submarine domain of the overall Lesser Antilles arc [e.g. Boynton et al, 1979;Feuillet, 2000;Deplus et al, 2001;Feuillet et al, 2001;Guennoc et al, 2001;Truffert et al, 2004;Thinon et al, 2010;Kopp et al, 2011;Lebrun, 2011;Münch et al, 2013].…”

Section: Introductionmentioning

confidence: 99%

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Crustal structure of Guadeloupe islands and the Lesser Antilles arc from a new gravity and magnetic synthesis

Gailler

Martelet

Thinon

et al. 2013

Bulletin De La Société Géologique De France

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Guadeloupe island (West French Indies) is one of the twenty islands that compose the Lesser Antilles arc, which results from the subduction of the Atlantic ocean plate beneath the Caribbean one. The island lies in a complex volcano-tectonic system and the need to understand its geological context has led to numerous on-and offshore geophysical investigations. This work presents a compilation and the processing of available, on-land, airborne and marine, gravity and magnetic data acquired during the last 40 years on Guadeloupe islands and at the scale of the Lesser Antilles arc. The overall dataset provides new Bouguer and reduced to the pole magnetic anomaly maps at the highest achievable resolution. Regionally, the main central negative gravity trend of the arc allows defining two subsident areas. The first one is parallel to the arc direction (~N160 o E) to the north, whereas the second unexpected southern one is oriented parallel to oceanic ridges (N130 o E). Along the Outer arc, the long wavelength positive anomaly is interpreted, at least along the Karukera spur, as an up-rise of the volcanic basement in agreement with the seismic studies. To the NE of Guadeloupe, the detailed analysis of the geophysical anomalies outlines a series of structural discontinuities consistent with the main bathymetric morphologies, and in continuity of the main fault systems already reported in this area. Based on geophysical evidences, this large scale deformation and faulting of the Outer arc presumably primarily affects the Atlantic subducting plate and secondarily deforms the upper Caribbean plate and the accretion prism, as evidenced in bathymetry as well as on the islands. At the scale of Guadeloupe island, combined gravity and magnetic modeling has been initiated based on existing interpretation of old seismic refraction profiles, with a general structure in three main layers. According to our geophysical anomalies, additional local structures are also modeled in agreement with geological observations: i) the gravity and magnetic signals confirm an up-rise of the volcanic basement below the limestone platforms outcropping on Grande-Terre island ; ii) the ancient volcanic complexes of Basse-Terre island are modeled with high density and reverse magnetized formations; iii) the recent volcanic centre is associated with formations consistent with the low measured density and the underlying hydrothermal system. The E-W models coherently image a NNW-SSE depression structure in half-graben beneath Basse-Terre island, its western scarp following the arc direction in agreement with bathymetric and seismic studies to the north of the island. The so-defined depressed area, and particularly its opening in half-graben toward the SW, is interpreted as the present-day front of deformation of the upper plate, associated with the recent volcanic activity on and around Guadeloupe. Based on this regional deformation model, perspectives are given for further integrated investigation of key targets to address the internal structure and evolut...

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“…7a [Dorel et al, 1979]). Along these profiles, an interpretation in three seismic layers was proposed ( fig.…”

Section: Geophysical Constraintsmentioning

confidence: 95%

Section: Quantitative Interpretation Of the Main Geophysical Anomaliesmentioning

confidence: 99%

Section: Quantitative Interpretation Of the Main Geophysical Anomaliesmentioning

confidence: 99%

Section: Quantitative Interpretation Of the Main Geophysical Anomaliesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Crustal structure of Guadeloupe islands and the Lesser Antilles arc from a new gravity and magnetic synthesis

Gailler

Martelet

Thinon

et al. 2013

Bulletin De La Société Géologique De France

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Seismic Digital Twin of the Dumanoir Earth Dam

Noureddine,

De Martin,

Meouche

et al. 2024

Lecture Notes in Networks and Systems

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Coupes Sismiques des Structures Superficielles dans les Petites Antilles—II: Martinique

Eschenbrenner

Dorel

Viodé

1980

PAGEOPH

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Coupes sismiques des structures superficielles dans les petites antilles—I: Guadeloupe

Cited by 17 publications

References 4 publications

Crustal structure of Guadeloupe islands and the Lesser Antilles arc from a new gravity and magnetic synthesis

Crustal structure of Guadeloupe islands and the Lesser Antilles arc from a new gravity and magnetic synthesis

Seismic Digital Twin of the Dumanoir Earth Dam

Coupes Sismiques des Structures Superficielles dans les Petites Antilles—II: Martinique

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