@article{fdi:010081262, title = {{G}enetic relations between the {A}ves {R}idge and the {G}renada {B}ack-{A}rc {B}asin, {E}ast {C}aribbean {S}ea}, author = {{G}arrocq, {C}. and {L}allemand, {S}. and {M}arcaillou, {B}. and {L}ebrun, {J}. {F}. and {P}adron, {C}. and {K}lingelhoefer, {F}. and {L}aigle, {M}. and {M}unch, {P}. and {G}ay, {A}. and {S}chenini, {L}aure and {B}eslier, {M}. {O}. and {C}ornee, {J}. {J}. and de {L}epinay, {B}. {M}. and {Q}uillevere, {F}. and {B}ou{D}agher-{F}adel, {M}. and {GARANTI} {C}ruise {T}eam}, editor = {}, language = {{ENG}}, abstract = {{T}he {G}renada {B}asin separates the active {L}esser {A}ntilles {A}rc from the {A}ves {R}idge, described as a {C}retaceous-{P}aleocene remnant of the "{G}reat {A}rc of the {C}aribbean." {A}lthough various tectonic models have been proposed for the opening of the {G}renada {B}asin, the data on which they rely are insufficient to reach definitive conclusions. {T}his study presents, a large set of deep-penetrating multichannel seismic reflection data and dredge samples acquired during the {GARANTI} cruise in 2017. {B}y 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 {G}renada {B}asin and its margins as follows: (1) rifting occurred during the late {P}aleocene-early {E}ocene in a {NW}-{SE} direction and led to seafloor spreading during the middle {E}ocene; (2) this newly formed oceanic crust now extends across the eastern {G}renada {B}asin between the latitude of {G}renada and {M}artinique; (3) asymmetrical pre-{M}iocene depocenters support the hypothesis that the southern {G}renada {B}asin originally extended beneath the present-day southern {L}esser {A}ntilles {A}rc and probably partly into the present-day forearc before the late {O}ligocene-{M}iocene rise of the {L}esser {A}ntilles {A}rc; and (4) the {A}ves {R}idge has subsided along with the {G}renada {B}asin since at least the middle {E}ocene, with a general subsidence slowdown or even an uplift during the late {O}ligocene, and a sharp acceleration on its southeastern flank during the late {M}iocene. {U}ntil this acceleration of subsidence, several bathymetric highs remained shallow enough to develop carbonate platforms.}, keywords = {{G}renada {B}asin ; {A}ves {R}idge ; back-arc basin ; seismic reflection ; {C}aribbean ; {CARAIBE} ; {CARAIBES} {MER} ; {GRENADA} {BASSIN}}, booktitle = {}, journal = {{J}ournal of {G}eophysical {R}esearch : {S}olid {E}arth}, volume = {126}, numero = {2}, pages = {e2020{JB}020466 [29 ]}, ISSN = {2169-9313}, year = {2021}, DOI = {10.1029/2020jb020466}, URL = {https://www.documentation.ird.fr/hor/fdi:010081262}, }