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La Desirade island (Guadeloupe, French West Indies): a key target for deciphering the role of reactivated tectonic structures in Lesser Antilles arc building (2013)

Lardeaux, J.-M., Munch, P., Corsini, M., Cornee, J.-J., Verati, C., Lebrun, J.-F., Quillevere, F., Melinte-Dobrinescu, M., Leticee, J.-L., Fietzke, J., Mazabraud, Y., Cordey, F., Randrianasolo, A.

Societe Geologique de France (SGF)

In: Bulletin de la Societe Geologique de France

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Publication Date: 2013-03-26

Description: In this paper we present and discuss new investigations performed on both the magmatic basement and the sedimentary formations of La Désirade. We report structural and sedimentary evidences for several episodes of deformation and displacement occurring prior to the present day tectonics. The main faults, respectively N130 ± 10°, N040 ± 10° and N090 ± 10°, previously considered as marker of the current tectonic regime corresponds to reactivated tectonic structures developed first during late Cretaceous compression and second during Pliocene to early Pleistocene extension. We demonstrate also the importance of late Pliocene-early Pleistocene and middle-late Pleistocene vertical movements in this part of the Lesser Antilles fore-arc as well as the role of compressive tectonics in the over thickened character of the arc basement in the Guadeloupe archipelago.

Print ISSN: 0037-9409

Electronic ISSN: 0037-9409

Topics: Geosciences

Published by Societe Geologique de France (SGF)

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Pliocene to Pleistocene carbonate systems of the Guadeloupe archipelago, French Lesser Antilles: a land and sea study (the KaShallow project) (2013)

Munch, P., Lebrun, J.-F., Cornee, J.-J., Thinon, I., Guennoc, P., Marcaillou, B. J., Begot, J., Bertrand, G., De Berc, S. B., Biscarrat, K., Claud, C., De Min, L., Fournier, F., Gailler, L., Graindorge, D., Leticee, J.-L., Marie, L., Mazabraud, Y., Melinte-Dobrinescu, M., Moissette, P., Quillevere, F., Verati, C., Randrianasolo, A.

Societe Geologique de France (SGF)

In: Bulletin de la Societe Geologique de France

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Publication Date: 2013-03-26

Description: This work presents a synthesis of the present-day knowledge on both emerged and submerged carbonate platforms of the Guadeloupe archipelago. Onshore and offshore data acquired during the KaShallow project are presented. Since the early Zanclean, some isolated platforms developed onto a Jurassic to Tortonian basement which displayed reliefs inherited from a major extensional tectonic episode dated from –8 to –5 Ma. Marie-Galante, Grande Terre and the southern shelf of Grande-Terre show strong similarities with Zanclean to Gelasian red-algal facies upward changing into early Calabrian coral facies. A major erosional unconformity (SB2) was recognized and allows to distinguish two early Calabrian formations (Calcaires à Agaricia Formation and Calcaires à Acropora Formation). The final emersion of these platforms is late Calabrian. The La Désirade platform displays Zanclean to early Piacenzian red-algal facies upward changing into coral facies. This platform emerged as soon as in the late Piacenzian. The island subsided again in relation with later extensional tectonic episode and early Calabrian reef platform then unconformably deposited. The Colombie bank deposits comprise Pliocene basinal deposits overlain by late Calabrian coral reefs. The Flandre bank might have emerged synchronously with La Désirade but was drowned only in the late Pleistocene-Holocene interval. Four extensional tectonic episodes have been identified in the late Miocene-Recent interval. Their effects depend on the location of the platforms within the fore-arc.

Print ISSN: 0037-9409

Electronic ISSN: 0037-9409

Topics: Geosciences

Published by Societe Geologique de France (SGF)

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Pliocene to Pleistocene carbonate systems of the Guadeloupe archipelago, French Lesser Antilles: a land and sea study (the KaShallow project) (2013)

Münch, Philippe ; Lebrun, Jean-Frédéric. ; Cornée, Jean-Jacques ; [et al.]

EDP Sciences

In: Bulletin de la Société Géologique de France. 2013; 184(1-2): 99-110. Published 2013 Jan 01. doi: 10.2113/gssgfbull.184.1-2.99.

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Publication Date: 2013-01-01

Description: This work presents a synthesis of the present-day knowledge on both emerged and submerged carbonate platforms of the Guadeloupe archipelago. Onshore and offshore data acquired during the KaShallow project are presented. Since the early Zanclean, some isolated platforms developed onto a Jurassic to Tortonian basement which displayed reliefs inherited from a major extensional tectonic episode dated from −8 to −5 Ma. Marie-Galante, Grande Terre and the southern shelf of Grande-Terre show strong similarities with Zanclean to Gelasian red-algal facies upward changing into early Calabrian coral facies. A major erosional unconformity (SB2) was recognized and allows to distinguish two early Calabrian formations (Calcaires à Agaricia Formation and Calcaires à Acropora Formation). The final emersion of these platforms is late Calabrian. The La Désirade platform displays Zanclean to early Piacenzian red-algal facies upward changing into coral facies. This platform emerged as soon as in the late Piacenzian. The island subsided again in relation with later extensional tectonic episode and early Calabrian reef platform then unconformably deposited. The Colombie bank deposits comprise Pliocene basinal deposits overlain by late Calabrian coral reefs. The Flandre bank might have emerged synchronously with La Désirade but was drowned only in the late Pleistocene-Holocene interval. Four extensional tectonic episodes have been identified in the late Miocene-Recent interval. Their effects depend on the location of the platforms within the fore-arc.

Print ISSN: 0037-9409

Electronic ISSN: 1777-5817

Topics: Geosciences

Published by EDP Sciences on behalf of Société Géologique de France.

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