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

Raíssa Basti Ramos; Rosangela Felicio dos Santos; Uri Schattner; Rubens Cesar Lopes Figueira; Marcia Caruso Bícego; Francisco José Lobo; Michel Michaelovitch de Mahiques

doi:10.1007/s00367-019-00617-8

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

Raíssa Basti Ramos, Rosangela Felicio dos Santos, Uri Schattner, Rubens Cesar Lopes Figueira, Marcia Caruso Bícego, Francisco José Lobo, Michel Michaelovitch de Mahiques

Department of Marine Geosciences

Research output: Contribution to journal › Article › peer-review

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.

Original language	English
Pages (from-to)	989-999
Number of pages	11
Journal	Geo-Marine Letters
Volume	40
Issue number	6
DOIs	https://doi.org/10.1007/s00367-019-00617-8
State	Published - Dec 2020

Bibliographical note

Funding Information:
The authors acknowledge the crew and researchers of the two surveys held in 2016 and 2017, onboard R.V. Alpha Crucis. The São Paulo Science Foundation (FAPESP, grants 2014/08266-2, 2016/22194-7 and 2015/17763-2) funded this work. Partnerships between MM.de M., U.S. and F.L-S., are funded by FAPESP (grant 2017/50191-8) and the Brazilian National Research Council (CNPq, grant 401041/2014-0), respectively. M.M.de M. acknowledges CNPq for the research grants 303132/2014-0 and 300962/2018-5. This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior – Brasil (CAPES) – Finance Code 001 (R.B.R. MSc. Scholarship).

Funding Information:
The authors acknowledge the crew and researchers of the two surveys held in 2016 and 2017, onboard R.V. Alpha Crucis. The S?o Paulo Science Foundation (FAPESP, grants 2014/08266-2, 2016/22194-7 and 2015/17763-2) funded this work. Partnerships between MM.de M., U.S. and F.L-S., are funded by FAPESP (grant 2017/50191-8) and the Brazilian National Research Council (CNPq, grant 401041/2014-0), respectively. M.M.de M. acknowledges CNPq for the research grants 303132/2014-0 and 300962/2018-5. This study was financed in part by the Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior ? Brasil (CAPES) ? Finance Code 001 (R.B.R. MSc. Scholarship).

Publisher Copyright:
© 2019, Springer-Verlag GmbH Germany, part of Springer Nature.

ASJC Scopus subject areas

Oceanography
Environmental Science (miscellaneous)
Geotechnical Engineering and Engineering Geology
Earth and Planetary Sciences (miscellaneous)

Access to Document

10.1007/s00367-019-00617-8

Cite this

@article{e032bad9c6564c0bbb17e49a2b7ef32b,

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

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.",

author = "Ramos, {Ra{\'i}ssa Basti} and {dos Santos}, {Rosangela Felicio} and Uri Schattner and Figueira, {Rubens Cesar Lopes} and B{\'i}cego, {Marcia Caruso} and Lobo, {Francisco Jos{\'e}} and {de Mahiques}, {Michel Michaelovitch}",

note = "Funding Information: The authors acknowledge the crew and researchers of the two surveys held in 2016 and 2017, onboard R.V. Alpha Crucis. The S{\~a}o Paulo Science Foundation (FAPESP, grants 2014/08266-2, 2016/22194-7 and 2015/17763-2) funded this work. Partnerships between MM.de M., U.S. and F.L-S., are funded by FAPESP (grant 2017/50191-8) and the Brazilian National Research Council (CNPq, grant 401041/2014-0), respectively. M.M.de M. acknowledges CNPq for the research grants 303132/2014-0 and 300962/2018-5. This study was financed in part by the Coordena{\c c}{\~a}o de Aperfei{\c c}oamento de Pessoal de N{\'i}vel Superior – Brasil (CAPES) – Finance Code 001 (R.B.R. MSc. Scholarship). Funding Information: The authors acknowledge the crew and researchers of the two surveys held in 2016 and 2017, onboard R.V. Alpha Crucis. The S?o Paulo Science Foundation (FAPESP, grants 2014/08266-2, 2016/22194-7 and 2015/17763-2) funded this work. Partnerships between MM.de M., U.S. and F.L-S., are funded by FAPESP (grant 2017/50191-8) and the Brazilian National Research Council (CNPq, grant 401041/2014-0), respectively. M.M.de M. acknowledges CNPq for the research grants 303132/2014-0 and 300962/2018-5. This study was financed in part by the Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior ? Brasil (CAPES) ? Finance Code 001 (R.B.R. MSc. Scholarship). Publisher Copyright: {\textcopyright} 2019, Springer-Verlag GmbH Germany, part of Springer Nature.",

year = "2020",

month = dec,

doi = "10.1007/s00367-019-00617-8",

language = "English",

volume = "40",

pages = "989--999",

journal = "Geo-Marine Letters",

issn = "0276-0460",

publisher = "Springer Verlag",

number = "6",

}

TY - JOUR

T1 - Deep pockmarks as natural sediment traps

T2 - a case study from southern Santos Basin (SW Atlantic upper slope)

AU - Ramos, Raíssa Basti

AU - dos Santos, Rosangela Felicio

AU - Schattner, Uri

AU - Figueira, Rubens Cesar Lopes

AU - Bícego, Marcia Caruso

AU - Lobo, Francisco José

AU - de Mahiques, Michel Michaelovitch

N1 - Funding Information: The authors acknowledge the crew and researchers of the two surveys held in 2016 and 2017, onboard R.V. Alpha Crucis. The São Paulo Science Foundation (FAPESP, grants 2014/08266-2, 2016/22194-7 and 2015/17763-2) funded this work. Partnerships between MM.de M., U.S. and F.L-S., are funded by FAPESP (grant 2017/50191-8) and the Brazilian National Research Council (CNPq, grant 401041/2014-0), respectively. M.M.de M. acknowledges CNPq for the research grants 303132/2014-0 and 300962/2018-5. This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior – Brasil (CAPES) – Finance Code 001 (R.B.R. MSc. Scholarship). Funding Information: The authors acknowledge the crew and researchers of the two surveys held in 2016 and 2017, onboard R.V. Alpha Crucis. The S?o Paulo Science Foundation (FAPESP, grants 2014/08266-2, 2016/22194-7 and 2015/17763-2) funded this work. Partnerships between MM.de M., U.S. and F.L-S., are funded by FAPESP (grant 2017/50191-8) and the Brazilian National Research Council (CNPq, grant 401041/2014-0), respectively. M.M.de M. acknowledges CNPq for the research grants 303132/2014-0 and 300962/2018-5. This study was financed in part by the Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior ? Brasil (CAPES) ? Finance Code 001 (R.B.R. MSc. Scholarship). Publisher Copyright: © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.

PY - 2020/12

Y1 - 2020/12

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85075873392&partnerID=8YFLogxK

U2 - 10.1007/s00367-019-00617-8

DO - 10.1007/s00367-019-00617-8

M3 - Article

AN - SCOPUS:85075873392

SN - 0276-0460

VL - 40

SP - 989

EP - 999

JO - Geo-Marine Letters

JF - Geo-Marine Letters

IS - 6

ER -

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

Abstract

Bibliographical note

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this