Geological imprint of methane seepage on the seabed and biota of the convergent Hikurangi Margin, New Zealand: Box core and grab carbonate results

Campbell, Kathleen A.; Nelson, Campbell S.; Alfaro, Andrea C.; Boyd, Sheree; Greinert, Jens; Nyman, Stephanie Leigh; Grosjean, Emmanuelle; Logan, Graham A.; Gregory, Murray R.; Cooke, Steven J.; Линке, Петер; Milloy, Sophie; Wallis, Irene C.

doi:10.1016/j.margeo.2010.01.002

Cited by 54 publications

(45 citation statements)

References 102 publications

(131 reference statements)

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“…− the presence of a relatively large (100 m 2 ) platform-like structure composed of methane-derived carbonate (Campbell et al, 2010-this issue) associated with live methane-related megafauna (Bathymodiolus sp. mussels and Lamellibrachia sp.…”

Section: Differences In Seep Environment: Diffusive Versus Bubble-relmentioning

confidence: 99%

Active venting sites on the gas-hydrate-bearing Hikurangi Margin, off New Zealand: Diffusive- versus bubble-released methane

et al. 2010

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Keywords: methane seeps ROV Hikurangi Margin sea-floor observations temperature measurements bubble-release activity During the 'New Vents' SO191 cruise in 2007, the activity and distribution of seep sites on the gas-hydratebearing Hikurangi Margin, off northeastern New Zealand, were subjected to a highly detailed interdisciplinary study. Here we report on the visual observations and in situ measurements of physical properties performed with a ROV (remotely operated vehicle) and other video-guided platforms at two seep sites in the Rock Garden area; Faure Site and LM-3. The ROV allowed first ever visual observations of bubblereleasing methane seeps at the Hikurangi Margin. At Faure Site, bubble release was monitored during 4 dives, up to periods of 20 min. During the first dive, this resulted in the observation of six violent outbursts, each lasting 1 min over a three minute interval. These outbursts were accompanied by the displacement and resuspension of sediment grains, and the formation of small depressions, with a maximum diameter of 50 cm and depth of 15 cm, showing what is possibly an initial stage of pockmark formation. During subsequent dives at this bubble site, bubble release rates were rather constant and the previously observed outbursts could no longer be witnessed. At LM-3, the strongest manifestation of seep activity was a large platform (100 m 2 ), consisting of fresh authigenic carbonates, which was covered by seep fauna (live Bathymodiolus sp. mussels, Calyptogena sp. shells and live Lamellibrachia sp. tubeworms). Bubble activity near this platform was less prominent than at Faure Site. Our observations suggest that the two seep environments result from different types of methane release; mainly by bubble release at Faure Site and rather diffusive at LM-3. We propose a conceptual model where the different ways of methane release and seep environments may be explained by the depth of underlying hydrate occurrences and different tectonic histories of both seep sites.

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Section: Differences In Seep Environment: Diffusive Versus Bubble-relmentioning

confidence: 99%

Active venting sites on the gas-hydrate-bearing Hikurangi Margin, off New Zealand: Diffusive- versus bubble-released methane

et al. 2010

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“…In either case, however, the authigenic carbonate is often considered as the most reliable archive of the seepage activities in geological history (Kulm et al, 1986;Ritger et al, 1987;Paull et al, 1992;Roberts and Aharon, 1994;Peckmann and Thiel, 2004;Naehr et al, 2007Naehr et al, , 2009Meister et al, 2007;Bayon et al, 2009Bayon et al, , 2013Feng et al, 2010aFeng et al, ,2010bCampbell et al, 2010;Magalhães et al, 2012;Tong et al, 2013;Feng et al, 2013;Crémière et al, 2013) and another key carbon sink of the global carbon cycle according to the recent research (Scharg et al, 2013). In this regard, we could trace the exact seepage activity history and reconstruct the paleoenvironment, paleoclimate, and the biogeochemical processes involved in it to provide a convincing proof for the global carbon cycle, by investigating the historical authigenic carbonate minerals.…”

Section: Introductionmentioning

confidence: 99%

A unique Fe-rich carbonate chimney associated with cold seeps in the Northern Okinawa Trough, East China Sea

Sun

Wei

Zhang

et al. 2015

Deep Sea Research Part I: Oceanographic Research Papers

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“…Ritger et al, 1987;Boetius et al, 2000;Joye et al, 2004;Naehr et al, 2009). Such carbonates provide insight into past seepage and associated environmental parameters (Bohrmann et al, 1998;Aloisi et al, 2000;Peckmann et al, 2001;Peckmann and Thiel, 2004;Bayon et al, 2007;Naehr et al, 2007;Bayon et al, 2009;Feng et al, 2009;Campbell et al, 2010;Feng et al, 2010a,b;Haas et al, 2010;Luzinova et al, 2011;Bayon et al, 2013;Crémière et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Time integrated variation of sources of fluids and seepage dynamics archived in authigenic carbonates from Gulf of Mexico Gas Hydrate Seafloor Observatory

et al. 2014

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Geological imprint of methane seepage on the seabed and biota of the convergent Hikurangi Margin, New Zealand: Box core and grab carbonate results

Cited by 54 publications

References 102 publications

Active venting sites on the gas-hydrate-bearing Hikurangi Margin, off New Zealand: Diffusive- versus bubble-released methane

Active venting sites on the gas-hydrate-bearing Hikurangi Margin, off New Zealand: Diffusive- versus bubble-released methane

A unique Fe-rich carbonate chimney associated with cold seeps in the Northern Okinawa Trough, East China Sea

Time integrated variation of sources of fluids and seepage dynamics archived in authigenic carbonates from Gulf of Mexico Gas Hydrate Seafloor Observatory

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