the world’s deepest hydrothermal vents: an analog for europa?

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The world’s deepest hydrothermal vents: An analog for Europa? Emma Versteegh Caltech postdoctoral scholar Jet Propulsion Laboratory, California InsCtute of Technology © 2014 California InsCtute of Technology. Government sponsorship acknowledged.

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Short presentation I gave to a group of USC students

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Page 1: The world’s deepest hydrothermal vents: An analog for Europa?

The  world’s  deepest  hydrothermal  vents:  An  analog  for  Europa?  

Emma  Versteegh  Caltech  postdoctoral  scholar  

 Jet  Propulsion  Laboratory,  California  InsCtute  of  Technology  

   

©  2014  California  InsCtute  of  Technology.  Government  sponsorship  acknowledged.  

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NASA/JPL  

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Europa  

NASA/JPL   Chyba  &  Hand  (2001)  

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The  world’s  deepest:  Mid-­‐Cayman  Rise  

Jack  Cook,  WHOI   NOAA  Okeanos  Explorer  

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Exploring  the  deep  ocean  

Advanced  Imaging  and  VisualizaCon  Laboratory,  WHOI  

h[p://www.nauCluslive.org/  

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Life  without  sunlight:  Food  producCon  &  where  it  comes  from  

Food  =  carbohydrates  (Cm(H2O)n)  

Photosynthesis  makes  carbohydrates:  6  CO2  +  12  H2O  +  sunlight  →  C6H12O6  +  6  H2O  +  6  O2    Chemosynthesis  also  makes  carbohydrates  6  CO2  +  6  H2O  +  3  H2S  →  C6H12O6  +  3  H2SO4  

 Would  work  on  Europa  too  •  QuanCfy  biomass  expected?  →  look  on  Earth  •  How  much  new  biomass/Cme?  →  food  web  

NAS

A/JPL/Ted  Stryk  

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Stable  isotopes  in  the  food  web  Elements  C,  N  &  S  Atoms  of  different  weights  FracConate  in  (bio)chemical  processes                You  are  what  you  eat  

•  +1  (δ13C  ‰  vs.  VPDB)  •  +3  (δ15N  ‰  vs.  AIR)  •  +?  (δ34S  ‰  vs.  CDT)  

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Food  web  

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Rimicaris  hybisae  dense  

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Rimicaris  hybisae  sparse  

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From  the  ocean  to  the  laboratory  

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Shrimp  δ13C,  δ15N  &  δ34S  values  

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Food  web  

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Ongoing  work  

•  Do  they  parCally  rely  on  photosyntheCc  carbon?  

•  Carbon  and  sulfur  in  basalts  

•  Deep  sea  corals:  are  they  vent-­‐related?  

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What  about  Europa?  

•  We  help  understand  what  kind  of  life  might  be  there,  and  how  much  

•  We  help  develop  methods  to  detect  life  

h[p://w

ww.daviddarling.info/  

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NASA/JPL-­‐Caltech/Space  Science  InsCtute