Several shallow-sea hydrothermal vents are located offshore of Milos Island, Greece. Pore fluids at these sites are hot (~115°C), acidic (pH 5), sulfidic, and have either dilute or elevated chloride concentrations. The vents offer an ideal opportunity to target microbial processes that presumably transition from sulfide delivered with volcanic gases to sulfide produced by dissimilatory sulfate reduction in non-vent sediments.
Collaborators: Dave Fike (WUSTL), Jan Amend (USC), Greg Druschel (IUPUI), Jen Houghton (WUSTL), Roy Price (SBU), and Alyssa Findlay (Ben-Gurion Univ).
Gilhooly et al., Sulfur and oxygen isotope insights into sulfur cycling in shallow-sea hydrothermal vents, Milos, Greece. Geochemical Transactions 2014
Dave and Jan with dive gear.
Cliffs overlooking Paleochori Bay
Milos. Picture by Roy Price.
Sirocco! Picture by Roy Price.
White mat. Picture by Roy Price.
83°C at 20 cm below the seafloor. Picture by Roy Price.
Recovering film placed in sulfidic sediments. Note the white biofilm that formed along the sediment-water interface. Picture by Bill Gilhooly.
Roy and Jan hardly working.
Dave and Alyssa carrying the electrode setup to the beach. Picture by Roy Price.
Bill profiling pore water chemistry with micro-manipulator. Picture by Roy Price.
Yeah, we jumped off that rock.
The Erechtheum temple at the Acropolis in Athens.