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McKenzie River Research on Hydrates

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  • pawnfart
    I hadn t lately checked on the McKenzie river research on the Methanogens--where they are coring several thousand feet down where methanogens were found.
    Message 1 of 5 , Jul 1, 2002
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      I hadn't lately checked on the McKenzie river research on the
      Methanogens--where they are coring several thousand feet down where
      methanogens were found. Interestingly, some of these microbes have
      the ability to slow their metabolism down and only have cell division
      on hundred year time scales! There is a reported metablism potential
      to go the other way out of site. I wonder what even in the past year
      scientific discovery has brought us--certainly a better understanding
      of this microbrial habitat. The comment below about the biosphere
      that is being discussed as at least equal to the terrosphere boggles
      the mind. The link below is interesting:

      http://www.gfz-potsdam.de/pb4/pg3/projects/mallik-info.html


      "This deep biosphere must play a fundamental role in global
      biogeochemical cycles over both short and longer time scales because
      its mass is approximately comparable to that of the surface biosphere
      (Whiteman et al., 1998; Pedersen, 2000).

      The presence of viable methanogens within subsurface sediments points
      to the potential for in situ generation of microbial gas (Colwell et
      al., 1999). The investigated core revealed a gradient in the isotopic
      composition of the included gas from its top to base with several
      transitions zones (Lorenson et al., 1999). The upper section above
      the base of ice-bonded permafrost (600 m) was mainly dominated by
      biogenic gas, whereas this gas was thought to be diluted by
      thermogenic gas with increasing depth. A distinct transition zone at
      the lower part of the permafrost area indicates that the ice-bonded
      permafrost may have acted as a partial seal, impeding gas migration
      and the mixing of microbially generated gas from above and the flux
      of thermal gas from below. Below the permafrost boundary, both gas
      wetness and isotopic composition suggest a mixing of microbial and
      thermogenic gas, but with a distinct dominance of the latter.
      Nevertheless the still observable in-situ microbial gas production
      points to the existence of a deep microbial community of methanogenic
      bacteria. The highest gas yield can be observed from ca 900 m to 1110
      m in the zone of gas hydrate stability. The Mallik gas hydrate zone
      seems to trap mainly thermogenic gas and with that to act as a
      partial barrier to gas migration from below. The existence of
      bacterial populations (Colwell et al., 1999), biogenic methane and a
      gas hydrate zone (Lorenson et al., 1999) in deeper parts of the
      Mallik sites bears a promising opportunity that anaerobic processes
      like methanogenesis or AOM are important metabolic pathways in a deep
      biosphere community especially near the gas hydrate zone, which can
      be utilized as a carbon source."


      We think we have biosphere, climate, fossil fuel issues now--wait til
      man, in his infinite stupidity, begins to mess with this part of the
      biosphere.
    • b1blancer_29501
      ... Don t get to excited over it, Pawn. Geomagnetic-wise, it was a non-event. It looks like it did launch a CME, but it wasn t earth-directed. It sure makes
      Message 2 of 5 , Jul 1, 2002
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        --- In methanehydrateclub@y..., "pawnfart" <mike@u...> wrote:
        > This, again, matches well w/ the typhoon in the W. Pac.
        >

        Don't get to excited over it, Pawn. Geomagnetic-wise, it was a
        non-event. It looks like it did launch a CME, but it wasn't
        earth-directed. It sure makes for a darned impressive picture,
        though. Wow!!

        It looks like it erupted pretty close to sunspot region 19. This
        could be a sign of interesting things to come as that sunspot group
        rotates into an earth-pointing position. There wasn't a significant
        flare associated with the event, however.
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