
YOU MIGHT WANT TO PAT ATTENTION TO THIS....
pinnable... alert the masses and get to high ground soon....
On continental margins, oxidation of methane-rich fluids from the sediment often leads to formation of
authigenic carbonate pavements on the seafloor. The biogeochemical processes involved during this carbonate precipitation are increasingly understood,
but little is known about the duration or mode of carbonate crust formation. Here, we report
uranium and thorium concentrations and isotope
compositions for a set of 14 samples drilled across an authigenic carbonate pavement, which providethe first stratigraphy for a cold-seep carbonate crust. The 5.5-cm thick crust (NL7-CC2) was collectedby submersible on the Nile deep-sea fan in an area of active fluid venting......
VERY IMPORTANT PART HERE....
Cold seep carbonates are a promising archive of past fluid flow and gas hydrate
33 dissociation on continental margins....
UH OH...
anaerobic oxidation of methane (AOM) leads to enhanced alkalinity and dissolved
39 sulphide contents in pore waters, which favours carbonate precipitation and the
40 development of chemosynthetic communities on the seafloor....
Making sense now.......................................
The seafloor is alive...
But For how long?
Here is the Abstract documentation and findings From France...
U–Th stratigraphy of a cold seep carbonate crust
G. Bayona, *, G.M. Hendersonb and M. Bohnc
a Département Géosciences Marines, Ifremer, 29280 Plouzané, France
b Department of Earth Sciences, Oxford University, Parks Road, OX1 3PR Oxford, UK
c Microsonde Ouest, CNRS-UMR 6538, Ifremer, 29280 Plouzané, France
http://archimer.ifremer.fr/doc/2009/publ...n-6450.pdf