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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Deep pockmarks as natural sediment traps: a case study from southern Santos Basin (SW Atlantic upper slope)

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Author(s):
Ramos, Raissa Basti [1] ; dos Santos, Rosangela Felicio [1] ; Schattner, Uri [2] ; Figueira, Rubens Cesar Lopes [1] ; Bicego, Marcia Caruso [1] ; Lobo, Francisco Jose [3] ; de Mahiques, Michel Michaelovitch [1, 4]
Total Authors: 7
Affiliation:
[1] Univ Sao Paulo, Oceanog Inst, Praca Oceanog 191, BR-05508120 Sao Paulo, SP - Brazil
[2] Univ Haifa, Leon H Charney Sch Marine Sci, Dr Moses Straus Dept Marine Geosci, Haifa - Israel
[3] CSIC, Inst Andaluz Ciencias Tierra, Armilla - Spain
[4] Univ Sao Paulo, Inst Energy & Environm, Sao Paulo - Brazil
Total Affiliations: 4
Document type: Journal article
Source: GEO-MARINE LETTERS; v. 40, n. 6, SI, p. 989-999, DEC 2020.
Web of Science Citations: 1
Abstract

This study examines the role of deep pockmarks in acting as natural sediment traps. Multibeam bathymetry, single-channel seismic and sediment samples data were used for describing the morphology of pockmarks as well as the nature of sediments inside and outside these depressed features, in an area of Santos Basin (SW Atlantic upper slope), dominated by the strong flow of Brazil Current. Results show that the grain size and chemical composition of sediments inside pockmarks are distinct from the outside. Also, radiocarbon dating shows that Holocene ages are found only in samples located inside the pockmarks. Combination of sedimentological, geochemical and geochronological data allowed to recognise that deep pockmarks might present distinct sediment deposition processes when compared with those of shallow pockmarks, in which turbulence impedes sediment deposition, as reported in the literature. (AU)

FAPESP's process: 14/08266-2 - Continental slope morphological features on the SE Brazilian Margin: active tectonics versus modern oceanographic conditions
Grantee:Michel Michaelovitch de Mahiques
Support type: Regular Research Grants
FAPESP's process: 15/17763-2 - Mudbelts from the South and Southeast Brazil: implications about the anthropogenic influence on the marine environment
Grantee:Márcia Caruso Bícego
Support type: Research Projects - Thematic Grants
FAPESP's process: 17/50191-8 - Dymamics of salt dome exhumation on the ocean floor, focusing on Santos basin offshore Brazil
Grantee:Michel Michaelovitch de Mahiques
Support type: Regular Research Grants