2019-09-022019-09-022012-02ALVES, Igor Henrique Coelho. Geologia ambiental e sedimentologia do estuário do rio dendê, Barcarena (Pará). 2012. 135 f. Trabalho de Curso (Bacharelado em Geologia) - Faculdade de Geologia, Instituto de Geociências, Universidade Federal do Pará, Belém, 2012. Disponível em: http://bdm.ufpa.br/jspui/handle/prefix/1897. Acesso em :.http://bdm.ufpa.br/jspui/handle/prefix/1897This work presents characteristics hydrodynamic, sedimentological, geomorphological, physicochemical, mineralogical and physiographic of to Dendê estuary, a small tributary on the right bank of the Pará river, which rises in the “Baixo Platô Costeiro ou Terra Firme”, from the intersection of the local topography with the saturated zone of the groundwater in sediments Barreiras Group, approximately 10 meters above the average level of the tides, in Barcarena, in Pará river estuary The Dendê is a "drowned valley", normal, well-mixed, and its movement controlled by both the river and the strong local tidal currents, which are semi-diurnal amplitude and vary monthly and seasonally, between 2.5 m and a maximum of around 3m, and the highest occur during the syzygies and the equinoxes. The processes of sediment transport and deposition in the Dendê estuary, generate tidal sand bars, sand spits and sandwaves of metric dimensions, on the surface of which occur symmetrical ripple marks develop midrange. Referred sandbanks are elongated and preferentially oriented in NW-SE direction. The studied sediments of rivers Pará and Dendê are predominantly sandy, poorly selected ranging from well selected, sometimes associated with pelites. The dominant mineralogy in sand composed of quartz and lateritic fragments. The heavy minerals dominants are staurolite, zircon, tourmaline, rutile, kyanite, andalusite and sillimanite. The pelitic sediments are composed mainly of kaolinite, illite and quartz. The sedimentation in the mouth of the Dendê estuary occurs under strong hydrodynamic conditions, typical of the intertidal areas of the tidal flat. On the other hand, in the inside areas of the Dendê estuary, the clay sandy sediments are present in the margins of this river, formed by erosion of the floodplain, showed less energy in hydrodynamic conditions. The paleogeographic Model proposed for the area considering the Flandrian Transgression, beginning around 18,000 BP, as a starting point for sea level rise and the drowning of drainage and formation of estuaries in North Coastal Region of Brazil. The increasing sea level, planned for the near future, indicates that the erosion on the Para coast will tend to increase and are considered the next 1,000 years. The future Model to study area shows that the erosion will occur in the next 1000 years, the today surface to the level of 7 to 10m, which will mean an opening of the mouth of the Dendê river approximately 50m more each margin, reaching the ports of shipment of ore, situated on its left bank and right side, the Vila do Conde, a small city on the Pará river.Acesso AbertoGeologia AmbientalSedimentologiaEstuárioRio dendê (Barcarena - Pará)CNPQ::CIENCIAS EXATAS E DA TERRA::GEOCIENCIAS::GEOLOGIATrabalho de Curso - Graduação - Monografia