In July of 2004 we deployed DORISS/PUP in the Sea Cliff Hydrothermal Field on Gorda Ridge.
High temperature fluids (~300 deg C) were exiting from a number of vents along the Sea Cliff Hydrothermal Field (above left). We collected spectra from the exiting fluid using both a stand-off optic behind a dome window (not shown) and an immerision optic in an open-bottomed cube (above right).
Spectra were obtained from minerals (anhydrite and barite), and bacterial mats using the precision underwater positioner (PUP) (above).
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