An integrated view of the methane system in the pockmarks at Vestnesa Ridge, 79°N
Abstract
The Vestnesa Ridge is a NW-SE trending, ~ 100 km-long, 1–2 km-thick contourite sediment section located in the Arctic Ocean, west of Svalbard, at 79°N. Pockmarks align along the ridge summit at water depths of ~ 1200 m; they are ~ 700 m in diameter and ~ 10 m deep relative to the surrounding seafloor. Observations of methane seepage in this area have been reported since 2008. In this report we summarize and integrate the available information to date and report on the first detailed seafloor imaging and camera-guided multicore sampling at two of the most active pockmarks along Vestnesa Ridge, named Lomvi and Lunde. We correlate seafloor images with seismically defined subseafloor structures, providing a geological and ecological context to better understand pockmark formation. Subbottom and seismic surveys, water column imaging, geochemical data and seafloor observations indicate ongoing fluid flow at these pockmarks. Visual inspection and sampling using a high-resolution deep-sea camera and multicorer system show exposed gas hydrate and authigenic carbonate in association with biota within two of these pockmarks. Distributed methane venting at both Lomvi and Lunde supports extensive chemosynthetic communities that include filamentous sulfide-oxidizing bacteria and siboglinid tubeworms, all of which utilize chemical energy provided bymore »
- Authors:
-
- UiT The Arctic University of Norway, Tromso (Norway)
- Woods Hole Oceanographic Institution, Woods Hole, MA (United States)
- Centre National de la Recherche Scientifique (CNRS), Paris (France)
- Oregon State University, Corvallis, OR (United States)
- University of New Hampshire, Durham, NH (United States)
- UiT The Arctic University of Norway, Tromso (Norway); Geological Survey of Norway, Trondheim (Norway)
- University of Girona (Spain)
- Publication Date:
- Research Org.:
- Oregon State Univ., Corvallis, OR (United States)
- Sponsoring Org.:
- USDOE Office of Fossil Energy (FE); National Science Foundation (NSF)
- OSTI Identifier:
- 1534073
- Alternate Identifier(s):
- OSTI ID: 1550440
- Grant/Contract Number:
- FE0013531; OCE-1154266
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Marine Geology
- Additional Journal Information:
- Journal Volume: 390; Journal Issue: C; Journal ID: ISSN 0025-3227
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 58 GEOSCIENCES; fluid expulsions; methane; pockmarks; gas flares; seeps; gas hydrate; photomosaicing; carbonate concretions; chemosynthetic organisms; Vestnesa; Arctic Ocean
Citation Formats
Panieri, Giuliana, Bünz, Stefan, Fornari, Daniel J., Escartin, Javier, Serov, Pavel, Jansson, Pär, Torres, Marta E., Johnson, Joel E., Hong, WeiLi, Sauer, Simone, Garcia, Rafael, and Gracias, Nuno. An integrated view of the methane system in the pockmarks at Vestnesa Ridge, 79°N. United States: N. p., 2017.
Web. doi:10.1016/j.margeo.2017.06.006.
Panieri, Giuliana, Bünz, Stefan, Fornari, Daniel J., Escartin, Javier, Serov, Pavel, Jansson, Pär, Torres, Marta E., Johnson, Joel E., Hong, WeiLi, Sauer, Simone, Garcia, Rafael, & Gracias, Nuno. An integrated view of the methane system in the pockmarks at Vestnesa Ridge, 79°N. United States. https://doi.org/10.1016/j.margeo.2017.06.006
Panieri, Giuliana, Bünz, Stefan, Fornari, Daniel J., Escartin, Javier, Serov, Pavel, Jansson, Pär, Torres, Marta E., Johnson, Joel E., Hong, WeiLi, Sauer, Simone, Garcia, Rafael, and Gracias, Nuno. 2017.
"An integrated view of the methane system in the pockmarks at Vestnesa Ridge, 79°N". United States. https://doi.org/10.1016/j.margeo.2017.06.006. https://www.osti.gov/servlets/purl/1534073.
@article{osti_1534073,
title = {An integrated view of the methane system in the pockmarks at Vestnesa Ridge, 79°N},
author = {Panieri, Giuliana and Bünz, Stefan and Fornari, Daniel J. and Escartin, Javier and Serov, Pavel and Jansson, Pär and Torres, Marta E. and Johnson, Joel E. and Hong, WeiLi and Sauer, Simone and Garcia, Rafael and Gracias, Nuno},
abstractNote = {The Vestnesa Ridge is a NW-SE trending, ~ 100 km-long, 1–2 km-thick contourite sediment section located in the Arctic Ocean, west of Svalbard, at 79°N. Pockmarks align along the ridge summit at water depths of ~ 1200 m; they are ~ 700 m in diameter and ~ 10 m deep relative to the surrounding seafloor. Observations of methane seepage in this area have been reported since 2008. In this report we summarize and integrate the available information to date and report on the first detailed seafloor imaging and camera-guided multicore sampling at two of the most active pockmarks along Vestnesa Ridge, named Lomvi and Lunde. We correlate seafloor images with seismically defined subseafloor structures, providing a geological and ecological context to better understand pockmark formation. Subbottom and seismic surveys, water column imaging, geochemical data and seafloor observations indicate ongoing fluid flow at these pockmarks. Visual inspection and sampling using a high-resolution deep-sea camera and multicorer system show exposed gas hydrate and authigenic carbonate in association with biota within two of these pockmarks. Distributed methane venting at both Lomvi and Lunde supports extensive chemosynthetic communities that include filamentous sulfide-oxidizing bacteria and siboglinid tubeworms, all of which utilize chemical energy provided by the seeping fluids. Focused venting forms shallow gas hydrate, and sustains localized gas discharge from 50-m wide pits within the pockmarks. Cycles of carbonate precipitation and/or exhumation of carbonate deposits are indicated by scattered blocks of various size, pavements, and massive carbonate blocks up to 3 m high. Consistent with other observations along continental margin settings, we show that the extensive authigenic carbonate deposits in the Vestnesa pockmarks represent an important and prolonged methane carbon sink that prevents much of the upwardly flowing methane from reaching the overlying ocean.},
doi = {10.1016/j.margeo.2017.06.006},
url = {https://www.osti.gov/biblio/1534073},
journal = {Marine Geology},
issn = {0025-3227},
number = C,
volume = 390,
place = {United States},
year = {Sat Jul 08 00:00:00 EDT 2017},
month = {Sat Jul 08 00:00:00 EDT 2017}
}
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- Whiticar, M. J.; Werner, F.
- Geo-Marine Letters, Vol. 1, Issue 3-4
Gas-related sea floor craters in the Barents Sea
journal, December 1993
- Solheim, A.; Elverh�i, A.
- Geo-Marine Letters, Vol. 13, Issue 4
Works referencing / citing this record:
Active degassing across the Maltese Islands (Mediterranean Sea) and implications for its neotectonics
journal, June 2019
- Micallef, Aaron; Spatola, Daniele; Caracausi, Antonio
- Marine and Petroleum Geology, Vol. 104
Keystone Arctic paleoceanographic proxy association with putative methanotrophic bacteria
journal, July 2018
- Bernhard, Joan M.; Panieri, Giuliana
- Scientific Reports, Vol. 8, Issue 1
The benthic foraminiferal δ34S records flux and timing of paleo methane emissions
journal, January 2020
- Borrelli, C.; Gabitov, R. I.; Liu, M. -C.
- Scientific Reports, Vol. 10, Issue 1
A 160,000-year-old history of tectonically controlled methane seepage in the Arctic
journal, August 2019
- Himmler, Tobias; Sahy, Diana; Martma, Tõnu
- Science Advances, Vol. 5, Issue 8