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SUMMARY:Exploring the Hydrothermal Evolution of Ocean Crust using Scientif
 ic Ocean Drilling - Dr Rosalind Coggon (University of Southampton)
DTSTART:20191125T180000Z
DTEND:20191125T190000Z
UID:TALK129937@talks.cam.ac.uk
CONTACT:Natalie Forrest
DESCRIPTION:2018 marked 50 years since Deep Sea Drilling Project (DSDP\; 1
 968-1983) Leg 1 drilled 7 sites in the Gulf of Mexico and Atlantic Ocean\,
  initiating 5 decades of international co-operation in scientific ocean dr
 illing – arguably the most successful\, enduring international science c
 ollaboration. Drilling holes deeper than 100-200 m into the oceanic crust 
 is technologically challenging\, and igneous oceanic crust represents less
  than 2% of all the cores recovered to date by scientific ocean drilling. 
 However\, the material recovered has provided essential and hitherto unava
 ilable observations crucial to advancing our understanding of the processe
 s that repave two thirds of Earth's surface every ~200 My\, and the role o
 f ocean crust in global biogeochemical cycles.\n\nThis talk will explore t
 he history of scientific ocean drilling'\, including why and how we drill 
 in the oceans and give an overview of what we have learnt from 50 years of
  drilling. It will also introduce the upcoming 'South Atlantic Transect' d
 rilling\, which will re-visit an age transect originally spot-cored over 5
 0 years ago during DSDP Leg 3 to prove the theories of seafloor spreading 
 and plate tectonics\, to investigate the hydrothermal interactions between
  the aging ocean crust and the overlying ocean\, the evolution of the deep
  biosphere with substrate age\, and the paleoceanographic evolution of the
  South Atlantic Ocean.
LOCATION: Harker 1\, Department of Earth Sciences\, Downing Street
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