气候变化领域集成服务门户(CCPortal): Deep Structure of the Grenada Basin From Wide-Angle Seismic, Bathymetric and Gravity Data

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DOI	10.1029/2020JB020472
	Deep Structure of the Grenada Basin From Wide-Angle Seismic, Bathymetric and Gravity Data
	Padron C.; Klingelhoefer F.; Marcaillou B.; Lebrun J.-F.; Lallemand S.; Garrocq C.; Laigle M.; Roest W.R.; Beslier M.-O.; Schenini L.; Graindorge D.; Gay A.; Audemard F.; Münch P.; Klingelhoefer F.; Marcaillou B.; Lebrun J.-F.; Lallemand S.; Laigle M.; Beslier M.-O.; Schenini L.; Graindorge D.; Audemard F.; Münch P.; Gay A.; Cornée J.-J.; Mercier de Lépinay B.; Quillévéré F.; Agranier A.; Arcay D.; Boucard M.; Fabre M.; Heuret A.; Léticée J.-L.; Malengros D.; Oliot E.; Oregioni D.; Philippon M.; Ratzov G.; Yates B.; the GARANTI Cruise Team
发表日期	2021
ISSN	21699313
卷号	126 期号:2
英文摘要	The Grenada back-arc basin is located between the Aves Ridge, which hosted the remnant Early Paleogene “Great Caribbean Arc,” and the Eocene to Present Lesser Antilles Arc. Several earlier studies have proposed different modes of back-arc opening for this basin, including N-S and E-W directions. The main aim of this study is to constrain the circumstances leading to the opening of the basin. Three combined wide-angle and reflection seismic profiles were acquired in the Grenada basin. The final velocity models from forward travel time and gravity modeling image variations in thickness and velocity structure of the sedimentary and crustal layers. The sedimentary cover has a variable thickness between 1 km on top of the ridges to ∼10 km in the basin. North of Guadeloupe Island, the crust is ∼20 km thick without significant changes between Aves Ridge, the Grenada basin, and the Eocene and present Lesser Antilles arc. South of Guadeloupe Island the Grenada basin is underlain by a oceanic crust of mainly magmatic origin over a width of ∼80 km. Here, the western flank of the Lesser Antilles Arc, the crust is 17.5-km thick. The velocity structure of the Lesser Antilles Arc is typical of volcanic arcs or oceanic plateaus. West of the basin, the crust thickens to 25 km at Aves Ridge in an 80–100 km wide arc-ocean transition zone. The narrowness of this transition zone suggests that opening might have proceeded in a direction oblique to the main convergence. Opening probably was accompanied by moderate volcanism. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	back-arc basin; gravity; Grenada basin; wide-angle seismic
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187372
作者单位	Departamento de Ciencias de la Tierra, Universidad Simón Bolívar (USB), Caracas, Venezuela; Géosciences Marines, Ifremer, ZI de la Pointe de Diable, Plouzané, France; Geoazur, Université Côte d'Azur, CNRS, IRD, Observatoire de la Côte d'Azur, Valbonne, France; Géosciences Montpellier, Université des Antilles, CNRS, Université de Montpellier, Campus de Fouillole, Pointe-à-Pitre, Guadeloupe, France; Géosciences Montpellier, CNRS, Université de Montpellier, Université des Antilles, Montpellier, France; Laboratoire Géosciences Océan, CNRS-UBO-UBS, Université Bretagne Pays de Loire (UBL), Brest, Institut Universitaire Européen de la Mer, Plouzané, France; Venezuelan Foundation for Seismological Research, Caracas, Venezuela
推荐引用方式 GB/T 7714	Padron C.,Klingelhoefer F.,Marcaillou B.,et al. Deep Structure of the Grenada Basin From Wide-Angle Seismic, Bathymetric and Gravity Data[J],2021,126(2).
APA	Padron C..,Klingelhoefer F..,Marcaillou B..,Lebrun J.-F..,Lallemand S..,...&the GARANTI Cruise Team.(2021).Deep Structure of the Grenada Basin From Wide-Angle Seismic, Bathymetric and Gravity Data.Journal of Geophysical Research: Solid Earth,126(2).
MLA	Padron C.,et al."Deep Structure of the Grenada Basin From Wide-Angle Seismic, Bathymetric and Gravity Data".Journal of Geophysical Research: Solid Earth 126.2(2021).