Site 29

Bader, R.G.; Gerrard, R.D.; Bronson, W.E.; Bolli, H.M.; Hay, W.W.; Rothwell, W.T.; Jr., Ruef; M.H., Riedel; W.R., Sayles

doi:10.2973/dsdp.proc.04.108.1970

Cited by 2 publications

(3 citation statements)

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“…(1985), U1b was interpreted as the top of the acoustic basement due to its strong reflectivity and high interval velocity (4.25–5 km/s). Eocene cherts and cherty carbonates drilled in the Central Venezuelan Basin were attributed to the seismic horizon A” (Bader et al., 1970a), the highly reflective facies of which is similar to U1b. Based on its seismic facies, U1b may be indirectly correlated with the middle Eocene cherts and pelagic limestones identified both in the Grenadines and the Carúpano Basin (Figure 3).…”

Section: Resultsmentioning

confidence: 99%

Genetic Relations Between the Aves Ridge and the Grenada Back‐Arc Basin, East Caribbean Sea

et al. 2021

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The Grenada Basin is bounded to the east by the active Lesser Antilles Arc, to the west by the north-south trending Aves Ridge, commonly described as a Cretaceous-Paleocene remnant of the "Great Arc of the Caribbean" (Burke, 1988), and to the south by the transpressional plate boundary with South America (Figure 1). This setting led previous authors to propose various models for the origin of the Grenada Basin, most of them assuming the basin to be at least partly floored by oceanic crust that was formed during the

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Section: Resultsmentioning

confidence: 99%

Genetic Relations Between the Aves Ridge and the Grenada Back‐Arc Basin, East Caribbean Sea

et al. 2021

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“…The processing sequence of MCS data on Geovation included trace resampling from 2 to 4 ms, application of a bandpass filter (3,5,120,125 Hz), noise attenuation, spherical divergence correction, velocity analysis on CMP gathers, multiple removal by using surfacerelated multiple elimination and parabolic radon-transform techniques, predictive deconvolution, normal moveout (NMO) and dip moveout (DMO) corrections before 60-fold stack, and post-stack time migration at constant seawater velocity (1500 m/s).…”

Section: Data Acquisition and Processingmentioning

confidence: 99%

“…In previous studies (Aitken et al, 2011;Pinet et al, 1985), U1b was interpreted as the top of the acoustic basement due to its strong reflectivity and high interval velocity (4.25 to 5 km/s). Eocene cherts and cherty carbonates drilled in the Central Venezuelan Basin were attributed to the seismic horizon A'' (Bader et al, 1970a), the highly reflective facies of which is similar to U1b. Based on its seismic facies, U1b may be indirectly correlated with the middle Eocene cherts and pelagic limestones identified both in the Grenadines and the Carúpano Basin ( Figure 3).…”

Section: U1bmentioning

confidence: 99%

Genetic Relations Between the Aves Ridge and the Grenada Back-Arc Basin, East Caribbean Sea 

Garrocq

Lallemand

Marcaillou

et al. 2021

Preprint

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<p>The Grenada Basin separates the active Lesser Antilles Arc from the Aves Ridge, described as a Cretaceous-Paleocene remnant of the &#8220;Great Arc of the Caribbean.&#8221; Although various tectonic models have been proposed for the opening of the Grenada Basin, the data on which they rely are insufficient to reach definitive conclusions. We present a large set of deep-penetrating multichannel seismic reflection data and dredge samples acquired during the GARANTI cruise in 2017. By combining them with published data including seismic reflection data, wide-angle seismic data, well data and dredges, we refine the understanding of the basement structure, depositional history, tectonic deformation and vertical motions of the Grenada Basin and its margins as follows: (1) rifting occurred during the late Paleocene- early Eocene in a NW-SE direction and led to seafloor spreading during the middle Eocene; (2) this newly formed oceanic crust now extends across the eastern Grenada Basin between the latitude of Grenada and Martinique; (3) asymmetrical pre-Miocene depocenters support the hypothesis that the southern Grenada Basin originally extended beneath the present-day southern Lesser Antilles Arc and probably partly into the present-day forearc before the late Oligocene-Miocene rise of the Lesser Antilles Arc; and (4) the Aves Ridge has subsided along with the Grenada Basin since at least the middle Eocene, with a general subsidence slowdown or even an uplift during the late Oligocene, and a sharp acceleration on its southeastern flank during the late Miocene. Until this acceleration of subsidence, several bathymetric highs remained shallow enough to develop carbonate platforms.</p>

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Site 29

Cited by 2 publications

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Genetic Relations Between the Aves Ridge and the Grenada Back‐Arc Basin, East Caribbean Sea

Genetic Relations Between the Aves Ridge and the Grenada Back‐Arc Basin, East Caribbean Sea

Genetic Relations Between the Aves Ridge and the Grenada Back-Arc Basin, East Caribbean Sea

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Cited by 2 publications

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Genetic Relations Between the Aves Ridge and the Grenada Back‐Arc Basin, East Caribbean Sea

Genetic Relations Between the Aves Ridge and the Grenada Back‐Arc Basin, East Caribbean Sea

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Genetic Relations Between the Aves Ridge and the Grenada Back-Arc Basin, East Caribbean Sea