Morphology and sedimentology of the shelf-upper slope transition in the Abrolhos continental shelf (east Brazilian margin)

D’Agostini, Danielle P.; Bastos, Alex Cardoso; Amado‐Filho, Gilberto M.; Vilela, Claudia Gutterres; Oliveira, Thaís Cristina Souza de; Webster, Jody M.; Moura, Rodrigo L.

doi:10.1007/s00367-019-00562-6

Cited by 14 publications

(3 citation statements)

References 61 publications

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“…Geomorphological studies are used to classify the features as depressions, channels, pinnacles, and submerged reefs, and their association with seafloor sediment distribution and composition, as well as biological communities' interactions. Studies have discussed the influence of antecedent geology and distinct spatially and temporally driven processes in the formation of the shelf-upper slope depositional features in contrasting geomorphological and sedimentological shelf breaks (D'Agostini et al, 2019; Figure 5N). Also, these studies map the seafloor and geology in the near subsurface using 3-D seismic reflection data from four sedimentary basins, with specific interest in the identification of constructive and destructive surfaces that record the seafloor of these fore-arc basins (Calvès et al, 2017; Figure 5H).…”

Section: Morphotectonicsmentioning

confidence: 99%

The South American Advances in Submarine Canyons Studies and Their Link to the Ocean Decade

Silva¹,

Araújo²

2021

Front. Mar. Sci.

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Submarine canyons have a relevant role in marine ecosystems. They are responsible for oceanographic conditions such as variability of temperature and salinity, sediment transport, nutrients, and even pollutants amongst marine areas. Submarine canyon studies have been growing and reaching prominence due to their importance in the Blue Economy. Initiatives to promote sustainable development for the ocean have been discussed in the Ocean Decade. Although canyons studies are increasing, how can we integrate these with the Ocean Decade outcomes? Thus, we aim to demonstrate an overview of the advances of submarine canyons studies and their link to the Ocean Decade for South America. We analyzed 160 studies divided into spatiotemporal analysis and study approaches according to the Ocean Decade outcomes. We discuss these articles, building a timeline and argumentative topics considering the advances, and discuss gaps to predict the future of submarine canyons studies in the Ocean Decade and Blue Economy context.

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Section: Morphotectonicsmentioning

confidence: 99%

The South American Advances in Submarine Canyons Studies and Their Link to the Ocean Decade

Silva¹,

Araújo²

2021

Front. Mar. Sci.

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“…The southern coast of Bahia, Brazil, borders a broad sector of the Brazilian continental shelf: the Royal Charlotte Bank (Fainstein andSummerhayes 1982, Palma 1984). The bank is a typical mixed carbonate-terrigenous sedimentary shelf, similar to the Abrolhos Bank, further south (Bastos et al 2015, D' Agostini et al 2019. The cross-shore transition of facies is characterized by a nearshore terrigenous domain, surrounding the coastal reefs.…”

Section: Introductionmentioning

confidence: 99%

“…The nearshore drift is influenced mainly by NE trade winds and N-NE waves (Dominguez et al 2009, Soutelino Sources: Brazilian Navy, Directorate of Hydrography and Navigation, Dominguez and Bittencourt (2012), Negrão et al (2021), andD' Agostini et al (2019). 1: terrigenous sand; 2: terrigenous mud; 3: terrigenous sandy mud with carbonate traces; 4: algal sandy packstone; 5: rhodolite boundstone and algal gravel packstone; 6: mixed terrigenous and carbonate sand/gravel; 7: algal gravel packstone; 8: reefs.…”

Section: Introductionmentioning

confidence: 99%

The provenance of terrigenous mud on reefs in Royal Charlotte Bank, Bahia, Brazil

Turbay,

Orlando,

Lacerda

et al. 2023

Braz. J. Geol.

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The East Brazilian continental margin contains a large shelf sector called the Royal Charlotte Bank. It has terrigenous and carbonate sedimentation associated with coastal reefs. Studies using X-ray diffractometry (XRD) and the geochemistry of immobile elements were done in samples of these reefs to figure out the provenance of the mud that arrives there. In order to do this, samples of riverine sediment from the Jequitinhonha, Santo Antônio, João de Tiba, and Buranhém rivers as well as from the Barreiras Group's sedimentary cliffs were taken. The Jequitinhonha River was found to be the most significant mud source. This was supported by the mineral fingerprints of smectite and biotite, the concentrations of immobile trace elements such as Zr, Hf, Nb, Ta, and Th, and the distribution and ratio of rare-earth elements. These findings are supported by the prevailing north-to-south drift that occurs in the region due to the northeasterly trade winds and waves that blow throughout the region for the vast majority of the year. The findings have significant implications for hydrographic basin management and the protection of reef benthic populations.

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Geodiversity and Biodiversity of the Tropical Shelf of Northeastern Brazil

Vital

Domínguez²,

Bastos³

et al. 2023

The Latin American Studies Book Series

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Morphology and sedimentology of the shelf-upper slope transition in the Abrolhos continental shelf (east Brazilian margin)

Cited by 14 publications

References 61 publications

The South American Advances in Submarine Canyons Studies and Their Link to the Ocean Decade

The South American Advances in Submarine Canyons Studies and Their Link to the Ocean Decade

The provenance of terrigenous mud on reefs in Royal Charlotte Bank, Bahia, Brazil

Geodiversity and Biodiversity of the Tropical Shelf of Northeastern Brazil

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