Expulsion of methane-rich warm fluid from mud volcano in the Canadian Beaufort Sea, Arctic ocean
- Expulsion of methane-rich warm fluid from mud volcano in the Canadian Beaufort Sea, Arctic ocean
- Kim, Young-Gyun
Jin, Young Keun
Hong, Jong Kuk
- International Symposium on Polar Sciences
- Issue Date
- Kim, Young-Gyun, et al. 2015. Expulsion of methane-rich warm fluid from mud volcano in the Canadian Beaufort Sea, Arctic ocean. The 21th International Symposium on Polar Sciences.. Incheon. 2015.05.19.-20.
- Marine heat flow measured at subsurface interval of a few meters using a heat probe is one of
useful approaches to show the status of fluid circulation within the marine sediments, even
though it can show only a snapshot of long-term variation caused by the fluid circulation.
Marine heat flow measurements using a 5 m-long Ewing-type heat probe was made at the
Canadian Beaufort Sea margin during the 2013 and 2014 R/V Araon Arctic cruises as the
Korea-Canada-U.S. cooperative research project. Observation results on the flat top of the mud
volcano seem to support the evidence that warm methane-rich fluid has been emitted through
sediments into the ocean. For instance, we found: 1) gas hydrates embedded in the sediment as
crystal form, 2) a much higher geothermal gradient than that from the outside of the mud
volcano as well as the background value from the regular seafloor, 3) a much higher seafloor
temperature compared with bottom water temperature, 4) a significantly high methane
concentration from the water samples, 5) gas plumes through the water column emitted from the
top of mud volcano. Comparison with background thermal conductivity, geothermal gradient,
and physical properties from the reference site implies that substantially high heat flow of the
mud volcano stems mainly from high thermal gradient. We need a further study on
configuration of such warm fluid generating the high geothermal gradient to assess the gas
hydrate stability zone across the mud volcano.
- Conference Name
- The 21th International Symposium on Polar Sciences.
- Conference Place
- Conference Date
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