Decreasing uplift rates and Pleistocene marine terraces settlement in the central lesser Antilles fore-arc (La Désirade Island, 16°N)

Léticée, Jean-Lèn; Cornée, Jean‐Jacques; Münch, Philippe; Fietzke, Jan; Philippon, Mélody; Lebrun, Jean‐Frédéric; Min, L. De; Randrianasolo, Auran

doi:10.1016/j.quaint.2018.10.030

Cited by 10 publications

(16 citation statements)

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“…Coring and isotopic or biostratigraphic dates as well as deeper seismic reflection imaging are needed to constrain the deep structure of Les Saintes plateau, as well as its entire vertical motion history, that might have varied through time. For comparison, the nearby islands of Marie-Galante and La Désirade underwent uplifts that slowed down during Upper-Pleistocene , Léticée et al, 2019. Being aware of our lack of constraints on the subsidence history of Les Saintes, we therefore propose to simply test if Les Saintes plateau can have formed in a context of subsidence that has slowed down or accelerated through time.…”

Section: Exploring Possible Subsidence Rate Historymentioning

confidence: 99%

“…Since 125 ka Battistini et al (1986) notice that the terrace formed during the MIS5e highstand (125 ka), when the sea level was +6-9 m above the current sea level (Kopp et al, 2009, Dutton andLambeck, 2012), is present along the coasts of La Désirade, Marie-Galante, and eastern Grande-Terre, but is absent along the coasts of Basse-Terre, Les Saintes, and southwestern Grande-Terre (see Table 1, Battistini et al, 1986, Bouysse et al, 1993, Lardeaux et al, 2013, Weil-Accardo, 2014, Léticée et al, 2019. Where outcropping on land, its inner edge (also named shoreline angle) lies at different altitudes between 2-3 m and 10 m, decreasing from east to west (Table 1; Figs.…”

Section: Spatial Distribution Of the Long-term Vertical Deformation Imentioning

confidence: 99%

“…250 ka), higher than the one estimated since 125 ka. Léticée et al (2019) also dated terraces in La Désirade, and estimated a minimum uplift rate of the order of 10 −1 m/k.y. since 306 ± 6 ka that shows that the uplift rate has also slowed down through time.…”

Section: Over Longer-time Scalesmentioning

confidence: 99%

“…3 and 4). The profiles reveal a stratigraphy composed of seismic units that are stacked vertically and separated by erosion surfaces that naturally dip Lardeaux et al (2013), Léticée et al (2019), Battistini et al (1986), Marie-Galante East 10 Dates; Battistini et al (1986), West 2-3 Inferred; Battistini et al (1986), , Bouysse et al (1993) Grande-Terre East (Gros Cap) 5-6 Dates; Battistini et al (1986) North (Anse Laborde) 3-5 Dates; Battistini et al (1986) Northwest (Anse Gris-Gris) (30 cm*) Dates; Weil-Accardo (2014) Southwest Not reported on land Battistini et al (1986) Basse-Terre Not reported on land Battistini et al (1986) Les Saintes Not reported on land Battistini et al (1986) *The MIS5e terrace does not form a morphologic terrace along the western coast of Grande-Terre, no shoreline angle was measured. The MIS5e deposit was found below the mangrove, and a sample recovered at 30 cm was dated.…”

Section: ■ Introductionmentioning

confidence: 99%

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Quaternary coral reef complexes as powerful markers of long-term subsidence related to deep processes at subduction zones: Insights from Les Saintes (Guadeloupe, French West Indies)

Leclerc

Feuillet

2019

Geosphere

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Geodetic measurements reveal modern rates of tectonic deformation along subduction zones, but the kinematics of long-term deformation are typically poorly constrained. We explore the use of submarine coral reefs as a record of long-term coastal vertical motion in order to determine deformation rate and discuss its origins. The Lesser Antilles arc results from the subduction of the American plates beneath the Caribbean plate and undergoes regional vertical deformation. Uplifted reefs along forearc islands are markers of the interplay between tectonics and sea-level variations since the late Pleistocene. We compared results from a numerical model of reef-island profile development to high-resolution marine geophysical measurements of Les Saintes reef plateau (Guadeloupe, French West Indies), a ∼20-km-wide, 250-m-thick submerged platform that lies at 45 m below sea level along the volcanic arc, to constrain its vertical deformation history. Models explore different scenarios over wide parameter domains including start time, basement morphology, sea level variations, reef growth rate, subaerial erosion rate, and vertical motion history. The major features of the plateau (its depth, internal structure, unusual double-barrier) is only reproduced in a context of subsidence, with a constant rate of −0.3 to −0.45 mm/yr since the late Pleistocene, or in a context of increasing subsidence, presently of ∼–0.2 mm/yr. Discussed in the framework of the forearc vertical deformation history, this result indicates subsidence is promoted by local faulting, volcanic, and deep subduction processes. Coseismic deformation accumulation could be a mechanism by which deformation builds up in the long-term. We show that subduction can drive long-term subsidence of a volcanic arc, and demonstrate that submarine reefs are powerful markers of long-term vertical motion.

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Section: Exploring Possible Subsidence Rate Historymentioning

confidence: 99%

Section: Spatial Distribution Of the Long-term Vertical Deformation Imentioning

confidence: 99%

Section: Over Longer-time Scalesmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Quaternary coral reef complexes as powerful markers of long-term subsidence related to deep processes at subduction zones: Insights from Les Saintes (Guadeloupe, French West Indies)

Leclerc

Feuillet

2019

Geosphere

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“…An earliest mid Miocene erosional unconformity is also found onshore in the Anguilla Bank. There, mid Miocene sediments are missing in Saint Martin island and the unconformity laterally correlates to an erosional unconformity overlain by Langhian Megabreccia deposits in nearby Tintamarre Islet (Andreieff et al, 1988;Léticée et al, 2019). This earliest mid Miocene unconformity is of regional extent as it was found offshore into the Kalinago Basin to the Saba Bank (Cornée et al, 2019).…”

Section: Regional Emersion Phasesmentioning

confidence: 99%

Paleogene V-shaped basins and Neogene subsidence of the Northern Lesser Antilles Forearc

Boucard

Marcaillou

Lebrun

et al. 2020

Preprint

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Oblique collision of buoyant provinces against subduction zones frequently results in individualizing and rotating regional-scale blocks. In contrast, the collision of the Bahamas Bank against the Northeastern Caribbean Plate increased the margin convexity triggering forearc fragmentation into small-scale blocks. This deformation results in a prominent >450km-long sequence of V-shaped basins that widens trenchward separated by elevated spurs,

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Estimation of Lesser Antilles Vertical Velocity Fields Using a GNSS-PPP Software Comparison

Sakic

Männel

Bradke

et al. 2020

International Association of Geodesy Symposia

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Vertical land motion in insular areas is a crucial parameter to estimate the relative sealevel variations which impact coastal populations and activities. In subduction zones, it is also a relevant proxy to estimate the locking state of the plate interface. This motion can be measured using Global Navigation Satellite Systems (GNSS), such as the Global Positioning System (GPS). However, the influence of the processing software and the geodetic products (orbits and clock offsets) used for the solution remains barely considered for geophysics studies.In this study, we process GNSS observations of Guadeloupe and Martinique network (Lesser Antilles). It consists of 40 stations over a period of 18 years for the oldest site. We provide an updated vertical velocity field determined with two different geodetic software,

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Decreasing uplift rates and Pleistocene marine terraces settlement in the central lesser Antilles fore-arc (La Désirade Island, 16°N)

Cited by 10 publications

References 61 publications

Quaternary coral reef complexes as powerful markers of long-term subsidence related to deep processes at subduction zones: Insights from Les Saintes (Guadeloupe, French West Indies)

Quaternary coral reef complexes as powerful markers of long-term subsidence related to deep processes at subduction zones: Insights from Les Saintes (Guadeloupe, French West Indies)

Paleogene V-shaped basins and Neogene subsidence of the Northern Lesser Antilles Forearc

Estimation of Lesser Antilles Vertical Velocity Fields Using a GNSS-PPP Software Comparison

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