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SUMMARY:Life Beneath the Sea Floor\; the Ins and Outs of Marine Mud from a
  Geochemical Perspective - Dr. Sasha Turchyn (Earth Sciences)
DTSTART:20141111T181500Z
DTEND:20141111T191500Z
UID:TALK54952@talks.cam.ac.uk
CONTACT:Mary Fortune
DESCRIPTION:Carbon is removed from Earth's surface during the burial and s
 ubsequent lithification of carbon bearing minerals\, primarily organic car
 bon (the breakdown of living organisms) and carbonate (also known as calci
 te or limestone).  When carbon bearing minerals are added to sediments how
 ever\, they continue to undergo chemical reactions as they are buried bene
 ath the ocean floor\; sediments are a large chemical and biological reacto
 r.  The deep biosphere in marine sediments comprises the bacteria and arch
 aea living largely in the absence of oxygen\; the deep biosphere is respon
 sible for the oxidation of the vast majority of organic carbon that arrive
 s onto marine sediments. I will discuss the use of geochemical measurement
 s in fluids and minerals from marine sediments as a mechanism for studying
  processes within the deep biosphere and their impact on global ocean chem
 istry and the carbon cycle.
LOCATION:Winstanley Lecture Theatre
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