TADP drilling will recover continuous long-duration Cenozoic successions from the four major Amazon sedimentary basins, which cover nearly 7 x 106 km2. Despite extensive exploratory oil and natural gas drilling in the region, there has been little coring of Cenozoic sequences, and published scientific studies on these materials are sparse. With few exceptions, what we know about the geology of the Amazon is based upon severely limited surface exposures, while the underlying Paleogene sediments are almost completely unknown.
Lithofacies and depositional environments will be determined on all recovered units, using visual core descriptions and standard sedimentologic facies analysis techniques (Miall, 1978, 1996; Leopold et al., 1992). Lithologies from non-recovered intervals will be inferred with the aid of down-hole logs. Vertical facies changes will be identified by variations in grain size, sedimentary structures, biogenic components, and types and abundance of organic material. These, along with plant and animal macro-and micro-fossils will be used in conjunction with the facies analysis to infer paleosalinity and palaeowater depths for lacustrine and floodplain sequences. Paleo-environmental models developed for the Neotropics, based on pollen (Muller, 1959; Lorente, 1986; Hofmann, 2002) and other plant and animal micro- and macro-fossils, will be used in combination with sedimentological analyses to identify major depositional systems, including open shelf, shore-face, lagoon, channels, tidal flat-mangrove, lacustrine, fluvial, and floodplain environments.
Este é um projeto estritamente acadêmico, dedicado ao avanço das ciências, sem qualquer finalidade financeira ou econômica.
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