| Registro completo |
| Provedor de dados: |
ArchiMer
|
| País: |
France
|
| Título: |
Types of fluid-related features controlled by sedimentary cycles and fault network in deepwater Nigeria
|
| Autores: |
Marsset, Tania
Ruffine, Livio
Ker, Stephan
Cauquil, E.
Gay, Aurelien
|
| Data: |
2018-01
|
| Ano: |
2018
|
| Palavras-chave: |
Niger delta
Fluid flow
Pockmark
Gas hydrates
Methane-derived carbonate
Fault network
Sedimentary cycles
|
| Resumo: |
The seismic characteristics of focused fluid-related features such as pockmarks and carbonate build-ups on the Nigerian continental slope have been investigated using complementary seismic data sets (reprocessed 3D exploration data and 2D Very High Resolution hull-mounted and near-bottom seismic data) coupled with the results of previous studies (sedimentological, geotechnical and geochemical analyses). The results show different types of fluid-related features within the hemipelagic phase of long duration (∼1 Myr) Turbidite/Hemipelagic cycles. They are the product of the disturbance of the hosting sediments following two main distinct processes: (1) no or low sediment deposition caused by fluid escape associated with seafloor settlement (benthic fauna, carbonate precipitation, gas hydrate formation) and (2) post-depositional erosion, caused either by fluid release (dewatering from underlying features such as channels and upward migration from a deep source) or by collapse (destabilisation of gas hydrates). The temporal evolution reveals a decrease in fluid flow during the hemipelagic deposition as witnessed by the decrease in methanogenic activity and by gas hydrate destabilisation. The spatial distribution of fluid-related features seems to be controlled by the type of fault (small fault or structural lineament).
|
| Tipo: |
Text
|
| Idioma: |
Inglês
|
| Identificador: |
http://archimer.ifremer.fr/doc/00405/51650/52199.pdf
DOI:10.1016/j.marpetgeo.2017.10.004
https://archimer.ifremer.fr/doc/00405/51650/
|
| Editor: |
Elsevier Sci Ltd
|
| Formato: |
application/pdf
|
| Fonte: |
Marine And Petroleum Geology (0264-8172) (Elsevier Sci Ltd), 2018-01 , Vol. 89 , N. Part.2 , P. 330-349
|
| Direitos: |
2017 Elsevier Ltd. All rights reserved
info:eu-repo/semantics/openAccess
restricted use
|
|
