Data/hora: 08/06/2024 10:14:44

Provedor de dados: | 5
País: | France

Título:

Etude de la dynamique des pockmarks associés à la présence d'hydrates de gaz : enseignements généraux à partir de deux cas d'école situés sur la marge africaine

Dynamics of gas hydrate-bearing pockmarks : learnings from two cases studies from the Gulf of Guinea

Autores: | De Prunele, Alexis.
Data: | 2015-03-18
Ano: | 2015
Palavras-chave: | Hydrate de gaz; Marge africaine; Hydrates; Gas hydrate; Pockmark; African margin; Hydrate.
Resumo: | The present work describes the dynamics of two pockmark areas, off West Africa. The intention is to propose two different approaches to study the relationships between fluid migration and pockmarks. The first investigated area corresponds to a pockmark cluster called Preowei, located off Nigeria. Geochemical analyses and modeling were combined with seismic data to detail the hydrocarbon migration pattern at this area, with implication on both the pockmark formation and the evolution of their morphology. The proposed interpretation seeks to identify the conceptual bases of pockmark evolution over time at this area. It is argued that the cluster has been active for at least 2700 years, and it is still at the stage of hydrate formation for some pockmarks and carbonate formation for other. The second investigated pockmark, called Regab, is located off Gabon. It is a giant pockmark of 800-m diameter, characterized by an ecosystem rich in fauna, with a large variety of living species. The main core of the work done on this pockmark was focused on finding a link between the fluid chemistry and the spatial distribution of the living communities which populate it. This was achieved by combining new geochemical and bathymetric results with a well-compiled dataset from the literature.
Tipo: | Text
Idioma: | Francês

Identificador:

https://archimer.ifremer.fr/doc/00498/60936/64329.pdf

https://archimer.ifremer.fr/doc/00498/60936/

Editor: | Université de Bretagne occidentale
Formato: | application/pdf

Fonte:

info:eu-repo/semantics/openAccess

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