Focused fluid flow through the gas-hydrate stability zone on the Vestnesa Ridge, offshore W-svalbard

Aas, Cecilie

Publication date

January 2014

Publisher

UiT The Arctic University of Norway

Abstract

Abstract: Numerous unburied seafloor pockmarks are related to current methane-leakage at Vestnesa Ridge (~79° N), west of Svalbard. About 50 km long and 1-3 km wide, Vestnesa Ridge is a 1-2 km thick sediment drift to the north of the active Molloy transform – on the eastern spreading segment. With its crest at 1200-1300 m depth, the ridge is located on young (<19.6 Ma) oceanic crust. The entire length of the crest is dominated by more than 100 pockmarks that are up to 700 m in diameter. The depressions in the seabed are caused by the vertical migration of gas through leakage structures; chimneys and pipes. The study area for this project is at the eastern end of Vestnesa Ridge, where the pockmarks are predominantly of a larger scale than t...

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Focused fluid flow through the gas-hydrate stability zone on the Vestnesa Ridge, offshore W-svalbard

Abstract

Extracted data

Focused fluid flow through the gas-hydrate stability zone on the Vestnesa Ridge, offshore W-svalbard

Abstract

Extracted data

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