Name: Romero Meyrelles Duarte
Type: MSc dissertation
Publication date: 31/08/2020

Namesort descending Role
Valéria da Silva Quaresma Advisor *

Examining board:

Namesort descending Role
Cleverson Guizan Silva External Examiner *
Valéria da Silva Quaresma Advisor *

Summary: As part of the brazilian East Margin Continental Shelf, with distinct morphology from the continental shelf, the Abrolhos Shelf presents great ecological relevance, being the largest rhodoliths bank in the world and presenting the greatest south Atlantic biodiversity. However, the geological history of this shelf is still poorly known. It is known about an important Paleocene-Eocene magmatic event wich installed the Abrolhos Volcanic Complex, whose volcanic build ups can be seen with geophysical methods. Some magmatic rocks outcrop in the Abrolhos archipelago islands. In this scenario, from data generated by the oil industry, this research revisited concepts and data to propose an evolutionary model for the mixed sedimentation Abrolhos shelf, wich has started in the late-Eocene and crossed the Late-Paleogene and all the Neogene periods as a barrier reef shelf in the northern portion, with an wide lagoon, and as an accretionary offlap shelf at the southern portion, WHERE the siliciclastic influx would reach the slope at the Lowstand Tracts. After the seismic interpretations was proposed a four stage evolutive model for the mixed sedimentation shelf, starting ate the constitution os the Abrolhos Volcanic Complex, until the Pliocene, demonstrating the installation and evolution of the mixed sedimentation shelf.

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