Data/hora: 01/06/2024 11:48:43

Provedor de dados: | 5
País: | France

Título:

La géomorphologie des fonds marins et la présence d’hydrates de gaz contrôlent les émissions de gaz dans la Mer Noire au large de la Roumanie

Control of the geomorphology and gas hydrate extent on widespread gas emissions offshore Romania

Autores: | Riboulot, Vincent; Cattaneo, Antonio; Scalabrin, Carla; Gaillot, Arnaud; Jouet, Gwenael; Ballas, Gregory; Marsset, Tania; Garziglia, Sebastien; Ker, Stephan.
Data: | 2017
Ano: | 2017
Palavras-chave: | Hydrates de gaz; Gaz libre; Panaches de gaz; BSR; Mer Noire; Géomorphologie; Gas hydrates; Free gas; Gas flares; BSR; Black Sea; Geomorphology.
Resumo: | The Romanian sector of the Black Sea deserves attention because the Danube deep-sea fan is one of the largest sediment depositional systems worldwide and is considered the world's most isolated sea, the largest anoxic water body on the planet and a unique energy-rich sea. Due to the high sediment accumulation rate, presence of organic matter and anoxic conditions, the Black sea sediments offshore the Danube delta is rich in gas and thus shows Bottom Simulating Reflectors (BSR). The cartography of the BSR over the last 20 years, exhibits its widespread occurrence, indicative of extensive development of hydrate accumulations and a huge gas hydrate potential. By combining old and new datasets acquired in 2015 during the GHASS expedition, we performed a geomorphological analysis of the continental slope north-east of the Danube canyon compared with the spatial distribution of gas seeps in the water column and the predicted extent of the gas hydrate stability zone. This analysis provides new evidence of the role of geomorphological setting and gas hydrate extent in controlling the location of the observed gas expulsions and gas flares in the water column. Gas flares are today considered an important source of the carbon budget of the oceans and, potentially, of the atmosphere.
Tipo: | Text
Idioma: | Francês

Identificador:

http://archimer.ifremer.fr/doc/00407/51860/53914.pdf

DOI:10.1051/bsgf/2017182

http://archimer.ifremer.fr/doc/00407/51860/

Editor: | Edp Sciences S A
Formato: | application/pdf
Fonte: | Bulletin De La Societe Geologique De France (0037-9409) (Edp Sciences S A), 2017 , Vol. 188 , N. 4 , P. 26 (1-12)

Fonte:

SGF, Published by EDP Sciences 2017

info:eu-repo/semantics/openAccess

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