What could form a 35-km lineament of carbonate mounds on the ocean floor?

Raissa Basti Ramos; Uri Schattner; Francisco José Lobo; Mascimiliano Maly; Rodolfo Jasão Soares Dias; Orlemir Carerette; Paulo Yukio Gomes Sumida; Michel Michaelovitch de Mahiques

doi:10.1016/j.marpetgeo.2023.106239

What could form a 35-km lineament of carbonate mounds on the ocean floor?

Raissa Basti Ramos, Uri Schattner, Francisco José Lobo, Mascimiliano Maly, Rodolfo Jasão Soares Dias, Orlemir Carerette, Paulo Yukio Gomes Sumida, Michel Michaelovitch de Mahiques

Department of Marine Geosciences

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

Abstract

A multibeam survey carried out in November 2019 reveals a lineament of seafloor protrusions on the Santos Basin (SW Atlantic) continental slope. Shallow seismic data and seafloor composition suggest the lineament comprises a 35 km long arrangement of Cold-Water Coral (CWC) carbonate mounds, here named the Tupana Carbonate Ridge (TCR), defined in this contribution for the first time. Insights into genetic controlling factors of the TCR led to the analysis of single-channel seismic profiles that cross the lineament. Interpretation of deep seismic reflection data suggests a stratigraphic control provided by the lateral arrangement of coastal deposits formed during the protracted progradation that characterized a significant portion of Santos Basin's depositional history. Coastal sandstones encased in low-angle shelf-margin progradational wedges constitute a potential hydrocarbon reservoir supplied by the flow of fluids toward the surface through vertical structures. The ultimate source of fluids seems to be provided by halokinetic movements on a region depleted of salts known as the Albian Gap domain. This work questions the role of seafloor hydrodynamics in shaping the TCR morphology by eroding the carbonate mounds and forming elongated contourite systems.

Original language	English
Article number	106239
Journal	Marine and Petroleum Geology
Volume	152
DOIs	https://doi.org/10.1016/j.marpetgeo.2023.106239
State	Published - Jun 2023

Bibliographical note

Funding Information:
The authors acknowledge the crew and researchers of R/V Alpha Crucis, cruises Mudbelts II, and BIOIL I. This research was carried out in association with the ongoing R&D project registered as ANP 21012–0, “MARINE LIFE - BMC - OIL AND GAS SEEPS (BIOIL)” (Universidade de São Paulo/Shell Brasil/ ANP) - Avaliação da Biologia e Geoquímica de Exsudações de Óleo e Gás na Costa Sudeste do Brasil, sponsored by Shell Brasil under the ANP R&D levy as “Compromisso de Investimentos com Pesquisa e Desenvolvimento”. Acknowledgments are also due to the São Paulo Science Foundation (Research Grant 2010/06147–5). Deep-seismic lines were provided by the Brazilian Agency of Petroleum, Natural Gas, and Biofuels (ANP) exclusively for educational use. RBR thanks Shell Brasil for the Ph.D. scholarship under number FUSP3310. MM de M and PYGS acknowledge the Brazilian Council of Scientific Research ( CNPq ) for the Research Grants 300962/2018–5 and 301554/2019–6, respectively.

Funding Information:
The authors acknowledge the crew and researchers of R/V Alpha Crucis, cruises Mudbelts II, and BIOIL I. This research was carried out in association with the ongoing R&D project registered as ANP 21012–0, “MARINE LIFE - BMC - OIL AND GAS SEEPS (BIOIL)” (Universidade de São Paulo/Shell Brasil/ ANP) - Avaliação da Biologia e Geoquímica de Exsudações de Óleo e Gás na Costa Sudeste do Brasil, sponsored by Shell Brasil under the ANP R&D levy as “Compromisso de Investimentos com Pesquisa e Desenvolvimento”. Acknowledgments are also due to the São Paulo Science Foundation (Research Grant 2010/06147–5). Deep-seismic lines were provided by the Brazilian Agency of Petroleum, Natural Gas, and Biofuels (ANP) exclusively for educational use. RBR thanks Shell Brasil for the Ph.D. scholarship under number FUSP3310. MM de M and PYGS acknowledge the Brazilian Council of Scientific Research (CNPq) for the Research Grants 300962/2018–5 and 301554/2019–6, respectively.

Publisher Copyright:
© 2023 Elsevier Ltd

Keywords

Carbonate mound
Countourites
Fluid flow
Salt tectonics
Santos Basin

ASJC Scopus subject areas

Oceanography
Geophysics
Geology
Economic Geology
Stratigraphy

Access to Document

10.1016/j.marpetgeo.2023.106239

Cite this

@article{afb51931d8e54665be8e773400c29b96,

title = "What could form a 35-km lineament of carbonate mounds on the ocean floor?",

abstract = "A multibeam survey carried out in November 2019 reveals a lineament of seafloor protrusions on the Santos Basin (SW Atlantic) continental slope. Shallow seismic data and seafloor composition suggest the lineament comprises a 35 km long arrangement of Cold-Water Coral (CWC) carbonate mounds, here named the Tupana Carbonate Ridge (TCR), defined in this contribution for the first time. Insights into genetic controlling factors of the TCR led to the analysis of single-channel seismic profiles that cross the lineament. Interpretation of deep seismic reflection data suggests a stratigraphic control provided by the lateral arrangement of coastal deposits formed during the protracted progradation that characterized a significant portion of Santos Basin's depositional history. Coastal sandstones encased in low-angle shelf-margin progradational wedges constitute a potential hydrocarbon reservoir supplied by the flow of fluids toward the surface through vertical structures. The ultimate source of fluids seems to be provided by halokinetic movements on a region depleted of salts known as the Albian Gap domain. This work questions the role of seafloor hydrodynamics in shaping the TCR morphology by eroding the carbonate mounds and forming elongated contourite systems.",

keywords = "Carbonate mound, Countourites, Fluid flow, Salt tectonics, Santos Basin",

author = "Ramos, {Raissa Basti} and Uri Schattner and Lobo, {Francisco Jos{\'e}} and Mascimiliano Maly and {Soares Dias}, {Rodolfo Jas{\~a}o} and Orlemir Carerette and {Gomes Sumida}, {Paulo Yukio} and {Michaelovitch de Mahiques}, Michel",

note = "Funding Information: The authors acknowledge the crew and researchers of R/V Alpha Crucis, cruises Mudbelts II, and BIOIL I. This research was carried out in association with the ongoing R&D project registered as ANP 21012–0, “MARINE LIFE - BMC - OIL AND GAS SEEPS (BIOIL)” (Universidade de S{\~a}o Paulo/Shell Brasil/ ANP) - Avalia{\c c}{\~a}o da Biologia e Geoqu{\'i}mica de Exsuda{\c c}{\~o}es de {\'O}leo e G{\'a}s na Costa Sudeste do Brasil, sponsored by Shell Brasil under the ANP R&D levy as “Compromisso de Investimentos com Pesquisa e Desenvolvimento”. Acknowledgments are also due to the S{\~a}o Paulo Science Foundation (Research Grant 2010/06147–5). Deep-seismic lines were provided by the Brazilian Agency of Petroleum, Natural Gas, and Biofuels (ANP) exclusively for educational use. RBR thanks Shell Brasil for the Ph.D. scholarship under number FUSP3310. MM de M and PYGS acknowledge the Brazilian Council of Scientific Research ( CNPq ) for the Research Grants 300962/2018–5 and 301554/2019–6, respectively. Funding Information: The authors acknowledge the crew and researchers of R/V Alpha Crucis, cruises Mudbelts II, and BIOIL I. This research was carried out in association with the ongoing R&D project registered as ANP 21012–0, “MARINE LIFE - BMC - OIL AND GAS SEEPS (BIOIL)” (Universidade de S{\~a}o Paulo/Shell Brasil/ ANP) - Avalia{\c c}{\~a}o da Biologia e Geoqu{\'i}mica de Exsuda{\c c}{\~o}es de {\'O}leo e G{\'a}s na Costa Sudeste do Brasil, sponsored by Shell Brasil under the ANP R&D levy as “Compromisso de Investimentos com Pesquisa e Desenvolvimento”. Acknowledgments are also due to the S{\~a}o Paulo Science Foundation (Research Grant 2010/06147–5). Deep-seismic lines were provided by the Brazilian Agency of Petroleum, Natural Gas, and Biofuels (ANP) exclusively for educational use. RBR thanks Shell Brasil for the Ph.D. scholarship under number FUSP3310. MM de M and PYGS acknowledge the Brazilian Council of Scientific Research (CNPq) for the Research Grants 300962/2018–5 and 301554/2019–6, respectively. Publisher Copyright: {\textcopyright} 2023 Elsevier Ltd",

year = "2023",

month = jun,

doi = "10.1016/j.marpetgeo.2023.106239",

language = "English",

volume = "152",

journal = "Marine and Petroleum Geology",