The coast and shelf of east and northeast Brazil and material transport |
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Authors: | B Knoppers W Ekau A G Figueiredo |
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Institution: | Departamento de Geoquímica, Universidade Federal Fluminense, Outeiro de S?o Jo?o Batista s/n, 24020-007 Niterói, RJ, Brazil, BR Zentrum für Marine Tropen?kologie, Universit?t Bremen, Fahrenheitstrasse 1, 28359 Bremen, Germany, DE Laboratório de Geologia Marinha, Universidade Federal Fluminense, Av. Litoranea s/n 24210-340 Niterói, RJ, Brazil, BR
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Abstract: | The east and northeast Brazil shelves of the Southwest Atlantic harbor some unique conditions for tropical passive margins
with western boundary currents. The narrow and open shelf is almost entirely covered by carbonate sediments due to little
freshwater input and the coast is impacted by the South Equatorial Current (SEC). The wide Abrolhos bank of the east Brazil
shelf, presents more diverse conditions, as it forms a physical barrier to the Brazil Current, and upwelling and land input
become more significant. The main characteristics of the coast and shelf and findings on biogeochemical, sedimentation, and
paleoceanographical processes, addressed by the Joint Oceanographic Projects (JOPS) campaigns, are summarized. |
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