This research is part of the projects of LJ: Ciencia do Mar II—CAPES, Paleoceanografia da Margem Equatorial Brasileira and of HV: IODP-CAPES—Geohazards e Tectônica—A influência de zonas de fratura na reativação de margens passivas: Margem Equatorial Brasileira. MG and LJ acknowledges the support of the Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP process n. 2012/15995-5 and 2011/22018-3, respectively).Peer reviewedPublisher PD

Alvarez

Azevedo

Bader

Bailey

Barker

Basile

Beltrami

Bohaty

Burke

Chopra

Coccioni

Condé

DeConto

Dias

Dickens

Dowsett

Fainstein

Figueiredo

Françolin

Friedrich

Genin

Heine

Jovane

Lear

Leyden

Lourens

Lyle

Marchant

Marinho

Matos

McHone

Milani

Miller

Mizusaki

Mohriak

Moulin

Mudelsee

Müller

Pagani

Pekar

Perlingeiro

Pessoa Neto

Pletsch

Poore

Rabinowitz

Ravelo

Renne

Robinson

Savian

Sexton

Silva

Soares

Souza-Lima

Storey

Sugden

Svensen

Szatmari

Thomaz Filho

Torsvik

Trosdtorf

Ussami

Wagner

Warny

Westerhold

Wright

Zachos

Zalán

Zanotto

Frontiers in Earth Science

Luigi Jovane

Jorge J. P. Figueiredo

Daniel P. V. Alves

David Iacopini

Martino Giorgioni

Paola Vannucchi

Denise S. Moura

Francisco H. R. Bezerra

Helenice Vital

Isabella L. A. Rios

Eder C. Molina

Frontiers - Publisher Connector

Seismostratigraphy of the Ceará Plateau: Clues to Decipher the Cenozoic Evolution of Brazilian Equatorial Margin

The Ceará Plateau offshore Fortaleza holds some particular characteristics when compared to the other seamounts of the Brazilian Equatorial Margin (BEM). Not only it is the largest and the closest to the continent, it is also located at the boundary between the continental and the oceanic crusts, while all the others seamounts along the BEM are located on oceanic crust. Seismic imaging of the Ceará Plateau shows a disorganized interior, probably of volcanic origin, overlain by a series of horizontal seismic reflectors that can be interpreted as pelagic/hemipelagic sediments. As large uncertainties exist about the age of the initial formation of this seamount, three scenarios must be considered. If the age of the volcanic edifice is Coniacian (1), then the overlying pelagic/hemipelagic sedimentary succession can include an almost continuous record of the last ~90 Ma at the Equatorial Atlantic Ocean. In the case that the volcanic edifice is Eocene in age (2), the sedimentary sequence would still encompass the upper Paleogene and all the Neogene. There is also the possibility that the volcanic edifice was built during multiple magmatic events (3). In this case, it is likely that the sediments are interfingered with volcanic rocks at the edge of the structure. Although the age estimation (between Coniacian and Eocene) has an uncertainty of more than 40 Myr, the current interpretation is that it developed initially as a volcanic edifice, formed by a series of magmatic events that occurred between the Santonian and the Eocene. Since then, the topography has been leveled by pelagic/hemipelagic sedimentation. Whichever was the initial age, a continuous and constant sequence of sediments deposited onto the Ceará Plateau, at the same latitude, and thus under the same oceanographic conditions, for the last several tens of million years. This represents a unique opportunity to record a long-term history of the Atlantic Equatorial Margin

Jorge Picanco Figueiredo

Daniel Pavani Alves

Denise Silva de Moura

Francisco Hilario Bezerra

Isabella Rios

Eder C Molina

Directory of Open Access Journals

Seismostratigraphy of the Cear&#225; Plateau: clues to decipher the Cenozoic evolution of Brazilian Equatorial Margin

Jovane L.

Figueiredo J. J. P.

Alves D. P. V.

Iacopini D.

Giorgioni M.

Vannucchi P.

Moura D. S.

Bezerra F. H. R.

Vital H.

Rios I. L. A.

Molina E. C.

Archivio della ricerca - Università degli studi di Napoli Federico II

Seismostratigraphy of the Ceará Plateau: Clues to decipher the cenozoic evolution of Brazilian equatorial margin

The Ceará Plateau offshore Fortaleza holds some particular characteristics when compared to the other seamounts of the Brazilian Equatorial Margin (BEM). Not only it is the largest and the closest to the continent, it is also located at the boundary between the continental and the oceanic crusts, while all the others seamounts along the BEM are located on oceanic crust. For this reasons, the Ceará Plateau represents a key area to study the stratigraphy of the region throughout proximal to deep ocean facies in relation to sea-level and oceanographic variations. Seismic interpretation is performed providing important stratigraphic features of the sedimentary pattern of the Ceará and Potiguar Basins. Moreover, seismic imaging of the Ceará Plateau shows a “disorganized” interior, probably of volcanic origin, overlain by a series of horizontal seismic reflectors that can be interpreted as pelagic/hemipelagic sediments. As large uncertainties exist about the age of the initial formation of this seamount, three scenarios must be considered. If the age of the volcanic edifice is Coniacian (1), then the overlying pelagic/hemipelagic sedimentary succession can include an almost continuous record of the last ∼90 Ma at the Equatorial Atlantic Ocean. In the case that the volcanic edifice is Eocene in age (2), the sedimentary sequence would still encompass the upper Paleogene and all the Neogene. There is also the possibility that the volcanic edifice was built during multiple magmatic events (3). In this case, it is likely that the sediments are interfingered with volcanic rocks at the edge of the structure. Although the age estimation (between Coniacian and Eocene) has an uncertainty of more than 40 Myr, the current interpretation is that it developed initially as a volcanic edifice, formed by a series of magmatic events that occurred between the Santonian and the Eocene. Since then, the topography has been leveled by pelagic/hemipelagic sedimentation. Whichever was the initial age, a continuous and constant sequence of sediments deposited onto the Ceará Plateau, at the same latitude, and thus under the same oceanographic conditions, for the last several tens of million years. This would candidate the Ceará Plateau as a suitable opportunity to record a long-term history of the Atlantic Equatorial Margin

Vannucchi, Paola

Royal Holloway - Pure

Seismostratigraphy of the Ceará Plateau:Clues to Decipher the Cenozoic Evolution of Brazilian Equatorial Margin

This research is part of the projects of LJ: Ciencia do Mar II—CAPES, Paleoceanografia da Margem Equatorial Brasileira and of HV: IODP-CAPES—Geohazards e Tectônica—A influência de zonas de fratura na reativação de margens passivas: Margem Equatorial Brasileira. MG and LJ acknowledges the support of the Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP process n. 2012/15995-5 and 2011/22018-3, respectively).Peer reviewe

Jovane, Luigi

Picanco Figueiredo, Jorge

Pavani Alves, Daniel

Iacopini, David

Giorgioni, Martino

Silva de Moura, Denise

Hilario Bezerra, Francisco

Vital, Helenic

Rios, Isabella

C.Molina, Eder

Aberdeen University Research

English

Seismostratigraphy of the Ceará Plateau : Clues to Decipher the Cenozoic Evolution of Brazilian Equatorial Margin

Florence Research

Crossref

https://flore.unifi.it/bitstream/2158/1091096/1/2016%20Jovane%20et%20al%20Frontiers.pdf

Seismostratigraphy of the Ceará Plateau:Clues to Decipher the Cenozoic Evolution of Brazilian Equatorial Margin

Abstract

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Frontiers - Publisher Connector

Directory of Open Access Journals

Archivio della ricerca - Università degli studi di Napoli Federico II

Frontiers - Publisher Connector

Royal Holloway - Pure

Aberdeen University Research

Florence Research

Crossref

Royal Holloway - Pure