Aspectos sedimentológicos e batimétricos da plataforma continental norte de Pernambuco - Brasil

Abstract

This paper provides a brief contribution about the physiography and sedimentary cover of the inner and middle shelf adjacent to Itamaracá Island (PE). This research was based on data obtained from the project “Granulados Marinhos -GRANMAR Pernambuco”. From this data coverage, maps of bathymetry, mean diameter of sedimentary particles, sorting aspects, and calcium carbonate contents of surface deposits were prepared. The analysis of the physiography revealed the presence of indentations and depressions associated with the mouths of the rivers. The main results showed that the sedimentary cover is predominantly limestone of bioclastic origin, with sandy granulation and that the distribution of surface deposits is controlled by the association of local physiographic and hydrodynamic aspects. Beach sandstones and channels act on the environment energy, which promotes the sorting of sediments in the shelf