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| Cruz, A.m.; Reis, A.t.; Suc, J.p.; Silva, C.g.; Praeg, D.; Granjeon, D.; Rabineau, Marina; Popescu, S.m.; Gorini, C.. |
| The Amazon continental shelf hosted one of the world's largest mixed carbonate-siliciclastic platforms from the late Paleocene onwards - the Amapá carbonates. The platform architecture, however, remains poorly understood and causes and timing of the cessation of carbonate deposition are still controversial. Here we present a stratigraphic analysis of the Neogene succession of the Amapá carbonates, based on a grid of 2D/3D seismic data correlated to revised micropaleontological data from exploration wells. The results provide improved constraints on the age of the transition from predominantly carbonate to siliciclastic sedimentation, which is shown to have varied through time across three different sectors of the shelf (NW, Central and SE). Four Neogene... |
| Tipo: Text |
Palavras-chave: Mixed carbonate-siliciclastic platform; Carbonate architecture; Chonostratigraphic model; Non-eustatic accommodation; Shelf paleogeography. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00489/60066/63351.pdf |
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| Bache, François; Gorini, C; Olivet, Jean-louis; Rabineau, Marina; Aslanian, Daniel; Suc, J.p.. |
| Though the late Miocene "Messinian Salinity Crisis" has been intensely researched along the circum- Mediterranean basins, few studies have focused on the central part of the Mediterranean Basin and, especially, the pre-salt deposits. Within the Western Mediterranean, the Gulf of Lion is exceptional in that its sedimentary strata have not been significantly deformed. In addition, the Gulf of Lion is characterized by a relatively constant subsidence with continuous accommodation space for sediment accumulation. This configuration, together with the availability of a wealth of offshore information (seismic profiles, boreholes), enables us to precisely describe the sedimentary geometries on the margin and in the central basin. This study gives new elements for... |
| Tipo: Text |
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| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/2009/acte-6942.pdf |
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| Pellen, Romain; Aslanian, Daniel; Rabineau, Marina; Suc, J.p.; Gorini, C.; Leroux, Estelle; Blanpied, C.; Silenziario, C.; Popescu, S.m.; Rubino, J.l.. |
| Morphological sills condition sedimentary, water and fauna exchanges between different domains. In particular, sills are crucial factors to consider during the Messinian Salinity Crisis (MSC) palaeogeographic evolution (5.97–5.33 Ma) of the NW Mediterranean area. Here we focus on the Ebro River and its up to now unexplained short Messinian onshore length (~100 km) compared to that of the Messinian Rhone River (~480 km) despite similar present-day drainage basins. Thanks to an extensive seismic and borehole dataset, we present a new interpretation of a complete 270 km long Messinian Ebro incised-valley system course underneath the present-day continental margin and bathyal basin and its related distal detrital deposits. These results favour a syn-MSC or... |
| Tipo: Text |
Palavras-chave: NW Mediterranean Sea; Segmentation; Knickpoint; Ebro fluvial system; Messinian Salinity Crisis; Incised-valley system. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00506/61768/65747.pdf |
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