Petrographic and seismic evidence for the depositional setting of giant turbidite reservoirs and the paleogeographic evolution of Campos Basin, offshore Brazil

MTD distribution on a ‘passive’ continental margin: The Espírito Santo Basin (SE Brazil) during the Palaeogene

“…On the well documented Campos basin, Eocene strata similar to those in this study consists of an alternation of turbidite flows, masswasting and bottom-current reworked deposits that led to the development of lensoid sandy reservoirs confined by MTDs (Moraes et al, 2007). Reservoirs in the Campos Basin have very immature lithologies, reflecting a tectonically-active setting from where the sediments are derived (Fetter et al, 2009). We aim to identify the distribution of sand prone strata in similar MTD-rich units, and the control of adjacent salt structures on their deposition.…”

“…Fetter et al (2009) described these reservoirs as immature and hetherolithic, reflecting ongoing tectonic activity. Turbidite reservoirs in the Campos Basin mostly consist of arkoses, which include minor quartz, Fig.…”

Tectonic subsidence history and source-rock maturation in the Campos Basin, Brazil

“…mantle plume, which is not isostatically compensated, is required to explain our results. The intense magmatic activity during the Early Cretaceous syn-rift cycle is considered to have been a consequence of the Tristan da Cunha mantle plume (Hawkesworth et al 1992;Mizusaki et al 1992;Wilson 1992;Thompson et al 1998;An & Assumpçao 2006;Fetter et al 2009): the extruded (syn-rift) basalts have a similar geochemical signature to that of the continental flood basalts of the Paraná Basin magmatic province (Karner 2000;Fetter et al 2009). To produce these voluminous basalt flows, extensive partial melting in the upper mantle is required and would probably be accompanied by magmatic underplating (An & Assumpçao 2006) in the area in and around the Campos Basin.…”

Os primeiros turbiditos do Brasil

“…Quando as primeiras acumulações foram descobertas, a comunidade geocientífica se viu diante da necessidade de desenvolver modelos geológicos para a exploração e produção desses reservatórios. Deste modo, pesquisas sobre turbiditos e outros temas ligados a ambientes deposicionais de águas profundas tornaram-se comuns, englobando estudos em afloramentos e em subsuperfície nas diferentes bacias brasileiras (Fisher et al, 1973;Zalán et al, 1981;Bruhn & Moraes 1989;Carminatti and Scarton, 1991;Bruhn & Walker, 1995;Caddah et al, 1998;d'Avila et al 2008;Fetter et al, 2009;Arienti et al, 2013).…”