Figure 3.

Dante chimney sample. (a) Hydrothermal chimney actively venting 300°C fluid as seen on the seafloor prior to collection. (b) The hydrothermal chimney fragments as seen on board ship prior to subsampling. (c) RLP of typical pyrite-rich and sphalerite-rich mush of the interior wall. (d) RLP/TLP of bladed pyrrhotite (Po), hexagonal wurtzite, minor chalcopyrite (yellow), and fine sphalerite in a dark grey clay matrix. (e) RLP of sharp contact with inner pyrite (top) and outer pyrrhotite with clay minerals and sphalerite. (f) RLP/TLP of semimassive colloform pyrite with interstitial anhydrite (Anh).