Seismic characteristics and distribution of hydrothermal vent complexes in the Cretaceous Offshore Rift Section of the Campos Basin, Offshore Brazil

Renata Alvarenga, David Iacopini, Juliano Kuchle, Claiton Scherer, Karin Goldberg

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Hydrothermal vents are structures that occur close to volcanically active areas. Their occurrence can have considerable impacts on the evaluation of the oil reserves of a basin. In the Campos Basin, eastern Brazilian continental margin, no hydrothermal vents have been previously recognized and related with magmatic events on seismic sections. This work aims to map the hydrothemal vents, ducts and associated intrusive bodies observed in the rifte section. With the use of 2D seismic data and a well with lithologic information, the occurrence of ten hydrothermal vents and seven ducts were mapped and the interval with volcanic intrusive rocks was characterized. The identification of intrusive rocks in seismic data is given by reflectors with high amplitude and disk or half-moon geometry with abrupt endings. The vent geometries shows dome and eye-shaped types and the ducts are fault-related, downward-tapering cone type. This study highlights new geological elements that can influence the petroleum systems of the Campos Basin, such as the identification of hydrothermal vents in seismic sections and the correlation with regional tectono-magmatic events.
Original languageEnglish
Pages (from-to)12-25
Number of pages14
JournalMarine and Petroleum Geology
Volume74
Early online date31 Mar 2016
DOIs
Publication statusPublished - Jun 2016

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vents
hydrothermal vent
Brazil
Cretaceous
ducts
basin
seismic data
geometry
occurrences
rocks
dome
Moon
continental margin
volcanic rock
petroleum
natural satellites
continental shelves
tapering
domes
crude oil

Keywords

  • Campos Basin
  • rift section
  • hydrothermal vent
  • seismic attributes
  • seismic texture

Cite this

Seismic characteristics and distribution of hydrothermal vent complexes in the Cretaceous Offshore Rift Section of the Campos Basin, Offshore Brazil. / Alvarenga, Renata ; Iacopini, David; Kuchle, Juliano ; Scherer, Claiton; Goldberg, Karin .

In: Marine and Petroleum Geology, Vol. 74, 06.2016, p. 12-25.

Research output: Contribution to journalArticle

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abstract = "Hydrothermal vents are structures that occur close to volcanically active areas. Their occurrence can have considerable impacts on the evaluation of the oil reserves of a basin. In the Campos Basin, eastern Brazilian continental margin, no hydrothermal vents have been previously recognized and related with magmatic events on seismic sections. This work aims to map the hydrothemal vents, ducts and associated intrusive bodies observed in the rifte section. With the use of 2D seismic data and a well with lithologic information, the occurrence of ten hydrothermal vents and seven ducts were mapped and the interval with volcanic intrusive rocks was characterized. The identification of intrusive rocks in seismic data is given by reflectors with high amplitude and disk or half-moon geometry with abrupt endings. The vent geometries shows dome and eye-shaped types and the ducts are fault-related, downward-tapering cone type. This study highlights new geological elements that can influence the petroleum systems of the Campos Basin, such as the identification of hydrothermal vents in seismic sections and the correlation with regional tectono-magmatic events.",
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