Mestrado em Oceanografia Ambiental
URI Permanente para esta coleção
Nível: Mestrado Acadêmico
Ano de início: 2007
Conceito atual na CAPES: 4
Ato normativo: Homologado pelo CNE(Portaria MEC Nº 609 de 14/03/2019) Publicação no DOU em 18/03/2019 Seç. 1, Pág. 63. Parecer CNE/CES nº 487/2018, Processo no 23001.000335/2018-51).
Periodicidade de seleção: Anual
Área(s) de concentração: Sistemas Costeiros e Marinhos
Url do curso: https://oceanografia.ufes.br/pt-br/pos-graduacao/PPGOA/detalhes-do-curso?id=1468
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Navegando Mestrado em Oceanografia Ambiental por Autor "Baptista Neto, José Antônio"
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- ItemFaciologia inter-recifal e geomorfologia dos recifes submersos da plataforma interna de Abrolhos, Bahia-Brasil(Universidade Federal do Espírito Santo, 2015-09-14) Leite, Marcos Daniel de Almeida; Bastos, Alex Cardoso; Baptista Neto, José Antônio; Quaresma, Valéria da SilvaThe presente study deals with geomorphic and sedimentology heterogeneity along the inner shelf of Abrolhos Shelf, Brazil. A combined analysis of side scan sonar, granulometric measurements and sub-bottom profiling characterized the facies heterogeneity of the study area. The results indicated a terrigenous to mixed supply at the Inner Arc and Abrolhos Channel. Outer Arc is represented by pure carbonate sediments. The seabed morphology were represented by different areas such as pinnacles, bank reefs, rhodoliths, pinnacles associated with rhodoliths, mesofhotic reefs and unconsolidated sediment (without reef structures). Pinnacles showed the highest heterogeneity facies in the study area, represented by all carbonate classes of sediment classification based on Larsonneur, while the Dunham classification were represented by wackstone, packstone and grainstone. Banks reefs for the most part is characterized by an muddy inter-reef facies (calcareous mud – Larsonneur/ wackstone and packstone – Dunham). Mesofhotic reefs are represented by a muddy and sandy inter-reef sedimentology while rhodoliths by gravelly deposits. The unconsolidated sediment were represented by two sedimentation patterns, muddy sediments in the Inner Arc and carbonate sandy (grainstone) at the Abrolhos Channel. Lastly, a facies distribution model is presented to the inner shelf of Abrolhos. Mixed sediments make up the Inner Arc, while Abrolhos Channel presents an extensive range of wackstones and packstones regions at the windward side of Inner Arc, those associated with reef structures (boundstone). Grainstones are near the leeward side of the Outer Arc. The Outer Arc samples are represented by a transition of boundstones (rhodoliths), grainstones (pinnacles) and wackstone/packstone (pinnacles, bank reefs and mesofotic reefs).
- ItemSedimentação da plataforma continental do Espírito Santo : do aporte terrígeno à ocorrência de fundos recifais(Universidade Federal do Espírito Santo, 2017-02-24) Vieira, Fernanda Vedoato; Bastos, Alex Cardoso; Baptista Neto, José Antônio; Amado Filho, Gilberto MenezesShort and long term processes, such as biological activity, sediment transport, hydrodynamic conditions, relative sea level variation, sedimentary input and pre-existing geology, determine the continental shelf morphology. The study area of this research is the continental shelf of the Brazilian east coast. Its platform presents a variation in its width, being of 240 km in the region of Abrolhos to 50 km in its remainder, accompanied by two distinct sedimentary regimes along the platform, the accommodation and supply regime. Associated with those factors, the coastal region is characterized by the presence of Barrier Formation Traps, Crystalline Basement and Quaternary Coastal Plains. These units are distributed in different forms along the coast. The acquired data had the objective to investigate how the long term processes influence the occurrence and distribution of the heterogeneous funds along the platform. The results showed four different reef structures, isolated type 1 and 2 reefs, concretions / crusts, paleovalleys bioconstructions, and an extensive rhodoliths funds throughout the study area. Mud deposits were restricted to the mouth of the Doce river, extending toward the north of the platform. The remainder of the platform is composed of carbonate sediments and terrigenous sand to the north. In the region southern of the Doce river the platform presented a carbonate domain with significant changes in its morphology, with the presence of paleovalleys, irregular structures associated with hardbottoms. For the region to the north, the platform presents a more homogenous morphology, with the presence of the delta of the Doce river and a widening of the platform in the region of Abrolhos. Thus, the geomorphology evolution of the platform was related to the long term processes, and these processes differentiated the faciology of the platform.
- ItemUtilização de proxies geoquímicos para análise dos padrões de sedimentação na plataforma continental interna adjacente a Foz do Rio Doce (ES)(Universidade Federal do Espírito Santo, 2013-04-02) Franco, Tarcila; Baptista Neto, José Antônio; Quaresma, Valéria da Silva; Rodrigues Neto, Renato; Fonseca, Estefan Monteiro daIn the Linhares city (Espírito Santo State), the Doce River empties into the Atlantic Ocean forming a deltaic feature on the Continental Shelf. The sediments that make up the delta come from the Doce River basin that is the largest in volume flow e drainage area in the State of Espirito Santo. Over the last decades the basin has undergone an intense process of occupation, processing e direct interference in the main channel. The objective of this study was to analyze geochemical proxies present at the Doce River deltaic deposit e determine a pattern of behavior by these depositional elements. For analyzes were performed sedimentological characteristics, organic matter e nutrients contents, metals concentration e sedimentation rates in cores collected on the continental shelf adjacent to the mouth of the Rio Doce. The cores were DT01 SOUTH (collected south of the mouth), DT02 NORTE (collected north) e their replicas, DT01R SOUTH e DT02R NORTE. The cores presented a composition of higher percentage of fine sediments in DT01 SOUTH compared to DT02 NORTE. The set of results obtained for water content, density e porosity identified a package of sedimentary recent deposition in DT01R SOUTH e DT02R NORTE sediments with higher compression. Being the points equidistant from the mouth, the highest sedimentation rates found in DT01R SOUTH indicate the major input of sediment to the South compared to the North. The C/N ratio in DT01 SOUTH was unable to identify the source of the organic material since the results were located in the transition zone between land e marine sources. In DT02 NORTH became clear the importance of autochthonous production as the C/N ratio was in the range of organic matter with marine origin. Cu values were close to natural with some exceptions mainly in DT01 SOUTH. The values of Pb exceeded the value found in the background on both cores may indicate a greater influence of anthropic contribution. Thus, the results obtained through the behavior of proxies in the delta of Rio Doce was possible to identify a preferential deposition of fine sediment carried by the river via the Continental Shelf adjacent to the South of the mouth.