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SUMMARY:Extreme change in sulfide concentrations near the Bosporus Inlet (
 Black Sea) during the Little Ice Age tracked using molybdenum isotopes - G
 ail Arnold\, MPI Bremen
DTSTART:20111011T153000Z
DTEND:20111011T163000Z
UID:TALK32858@talks.cam.ac.uk
CONTACT:Alexandra Turchyn
DESCRIPTION:Molybdenum isotope data indicate that in the region of the Bos
 porus inlet the chemocline rose more than 65 m\, reaching concentrations o
 ver 100 micromolar sulfide in the bottom water approximately 300 ybp. This
  historical shoaling of the chemocline and extreme change in bottom water 
 sulfide concentration exceeds the modern changes that have been observed d
 irectly and attributed to anthropogenic influences on the Black Sea chemis
 try/hydrology.  Our preliminary findings demonstrate the potential of the 
 Mo isotope proxy to reconstruct historical\, basin-wide changes in water-c
 olumn redox structure and sulfide concentrations in the Black Sea and othe
 r marine basins by analogy.
LOCATION:Harker 1 seminar room\, Department of Earth Sciences
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