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Quaternary nanofossils on the Brazilian continental shelf; Nanofosseis calcarios do quaternario da margem continental brasileira

Abstract

The study of calcareous nanofossils occurring in the deposits on the Brazilian continental margin began in the late 1960s, undertaken solely by PETROBRAS. Instead of presenting an academic outlook, the purpose of these investigations is first to formulate a biostratigraphic framework to apply to oil well samples. The initial result was the first zoning for the Brazilian continental margin, which considered the deposits formed between the Aptian and Miocene series. Since the 1960s to date, many papers have been written either with details of that original zoning or applying nanofossil biostratigraphy to solve stratigraphic problems. Regardless of all the papers and studies undertaken, little attention has been paid to the Quaternary, since these deposits are normally of no interest to petroleum geology stricto sensu, especially in a large part of the Brazilian margin. On the other hand, there are a few articles and some Master's dissertations and PhD theses that were written and/or are in progress in Brazilian universities. On the other hand, elsewhere in the world, Quaternary nanofossils have been thoroughly investigated in terms of biostratigraphy and paleoceanography. It is, therefore, very clear that there is a gap between what is being done elsewhere in the world and what  More>>
Authors:
Antunes, Rogerio Loureiro , E-mail: rlantunes@petrobras.com.br [1] 
  1. PETROBRAS S.A., Rio de Janeiro, RJ (Brazil). Centro de Pesquisas (CENPES). Gerencia de Bioestratigrafia e Paleoecologia
Publication Date:
Jul 01, 2007
Product Type:
Book
Resource Relation:
Related Information: Ciencia Tecnica Petroleo - Secao Exploracao de Petroleo, 21
Subject:
58 GEOSCIENCES; QUATERNARY PERIOD; FOSSILS; PLANKTON; CONTINENTAL MARGIN; STRATIGRAPHY; TAXONOMY; PALEONTOLOGY; BRAZIL
OSTI ID:
21424738
Country of Origin:
Brazil
Language:
Portuguese
Other Identifying Numbers:
Other: ISBN 978-85-99891-03-2; ISSN 0100-1515; TRN: BR1104383
Availability:
Available courtesy of the Nuclear Information Center of the Brazilian CNEN, Rio de Janeiro
Submitting Site:
BR
Size:
76 pages
Announcement Date:
May 14, 2011

Citation Formats

Antunes, Rogerio Loureiro , E-mail: rlantunes@petrobras.com.br. Quaternary nanofossils on the Brazilian continental shelf; Nanofosseis calcarios do quaternario da margem continental brasileira. Brazil: N. p., 2007. Web.
Antunes, Rogerio Loureiro , E-mail: rlantunes@petrobras.com.br. Quaternary nanofossils on the Brazilian continental shelf; Nanofosseis calcarios do quaternario da margem continental brasileira. Brazil.
Antunes, Rogerio Loureiro , E-mail: rlantunes@petrobras.com.br. 2007. "Quaternary nanofossils on the Brazilian continental shelf; Nanofosseis calcarios do quaternario da margem continental brasileira." Brazil.
@misc{etde_21424738,
title = {Quaternary nanofossils on the Brazilian continental shelf; Nanofosseis calcarios do quaternario da margem continental brasileira}
author = {Antunes, Rogerio Loureiro , E-mail: rlantunes@petrobras.com.br}
abstractNote = {The study of calcareous nanofossils occurring in the deposits on the Brazilian continental margin began in the late 1960s, undertaken solely by PETROBRAS. Instead of presenting an academic outlook, the purpose of these investigations is first to formulate a biostratigraphic framework to apply to oil well samples. The initial result was the first zoning for the Brazilian continental margin, which considered the deposits formed between the Aptian and Miocene series. Since the 1960s to date, many papers have been written either with details of that original zoning or applying nanofossil biostratigraphy to solve stratigraphic problems. Regardless of all the papers and studies undertaken, little attention has been paid to the Quaternary, since these deposits are normally of no interest to petroleum geology stricto sensu, especially in a large part of the Brazilian margin. On the other hand, there are a few articles and some Master's dissertations and PhD theses that were written and/or are in progress in Brazilian universities. On the other hand, elsewhere in the world, Quaternary nanofossils have been thoroughly investigated in terms of biostratigraphy and paleoceanography. It is, therefore, very clear that there is a gap between what is being done elsewhere in the world and what has been done in Brazil. In fact, this gap is not larger simply because of a few researchers in Brazilian universities who are studying this topic. The intention of this paper is to contribute toward a richer study of Quaternary nanofossils. It, therefore, contains illustrations and taxonomic descriptions of many species observed in the younger strata of the Brazilian margin basins. This article not only aspires to portray and disseminate the potential of nanofossils for the marine Quaternary study but is also an invitation to students (under and post-graduates) and university researchers - an invitation to learn a little more about the subject and spend some time studying these real gems of nanopaleontology. In taxonomic terms, 59 species belonging to 29 genera are presented, described and photographed. Several examples with genus identification are also illustrated, especially related to the Pontosphaeraceae, Rhabdosphaeraceae, Didemnidae and Thoracosphaeraceae families. In addition to comments on topics relating to university research on Quaternary deposits, this paper also presents and discusses the main biological events employed in biostratigraphic details of this section. The discussions, whose arguments were obtained from world literature, refer to the diachronic degree of those events in relation to the isotopic stratigraphy of oxygen ({delta}{sup 18}O) and the reversals of the onshore magnetic field (magnetostratigraphy). (author)}
place = {Brazil}
year = {2007}
month = {Jul}
}