Evolução complexa de um meio-gráben

seção rifte da Bacia de Campos baseada em análise sismoestratigráfica

Translated title of the contribution: Complex evolution of a half-graph: a rift section of the Campos Basin based on a seismostratigraphic analysis

Patrycia Ene (Corresponding Author), Juliano Kuchle, Renata Alvarenga, David Iacopini, Karin Goldberg

Research output: Contribution to journalArticle

1 Citation (Scopus)
15 Downloads (Pure)

Abstract

The rift section of the Campos Basin is composed of the basal to intermediate portion of the Fea Lagoon Group, and includes the main basin generating rock, and carbonate reservoir rocks. The interpretation and systematic mapping of 2D seismic lines in a key area of ​​the basin where two half-grains occur, integrated with lithological well data, and the construction of a chronostratigraphic chart, allowed to elaborate an evolutionary model for the initial phase of the bowl. Thus, ten seismostratigraphic units, key boundary surfaces and three earthquakes were defined, representing the main lithological groups of the rift section: edge failure deposits, resedimentary fine grain deposits and resedimentary deposits of coarse grains. The stratigraphy of the Campos Basin was subdivided into tectonic system tracts, reflecting its tectonostratigraphic evolution. The tract of rift start system presents well distributed tectonics. The system tract of high tectonic activity is marked by the significant movement of the edge faults; and the treatment of low tectonic activity systems is characterized by a process offault restriction . The analysis of each evolutionary stage led to the proposition of a tectonostratigraphic model. Initially the siniferous sediments were deposited in a sinformal depression without the presence of edge faults. With continuous grinding and increased tectonic activity, the deformation focused on the main faults, resulting in the formation of two well-structured half-gratings with well-defined fault edges. This phase was followed by a phase of incipient movement of the edge faults until cessation of rifting, resulting in a complex and interdependent filling between the different gutters of the basin during its development.

Original languagePortuguese
Pages (from-to)45-59
Number of pages15
JournalPesquisas em Geociências
Volume42
Issue number1
Publication statusPublished - 2015

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tectonics
basin
systems tract
reservoir rock
grinding
carbonate rock
rifting
lagoon
stratigraphy
analysis
earthquake
rock
sediment

Keywords

  • Campos Basin
  • seismic stratigraphy
  • rift basin
  • Eocretaceous
  • sequence stratigraphy

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)

Cite this

Evolução complexa de um meio-gráben : seção rifte da Bacia de Campos baseada em análise sismoestratigráfica. / Ene, Patrycia (Corresponding Author); Kuchle, Juliano ; Alvarenga, Renata ; Iacopini, David; Goldberg, Karin .

In: Pesquisas em Geociências, Vol. 42, No. 1, 2015, p. 45-59.

Research output: Contribution to journalArticle

Ene, Patrycia ; Kuchle, Juliano ; Alvarenga, Renata ; Iacopini, David ; Goldberg, Karin . / Evolução complexa de um meio-gráben : seção rifte da Bacia de Campos baseada em análise sismoestratigráfica. In: Pesquisas em Geociências. 2015 ; Vol. 42, No. 1. pp. 45-59.
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