Hydrothermal Organic Geochemistry (HOG) sampler for deployment on deep-sea submersibles

Abstract The fate of carbon while passing through the rocky subseafloor ocean has direct implications on global cycle now and over geologic time, as well abundance distribution life. Many organic geochemical studies require larger volumes fluids than traditional hydrothermal samplers can provide, also rigorous steps to be taken prevent contamination. Hydrothermal Organic Geochemistry (HOG) sampler is designed collect large volume (2–9 L) fluid samples with minimal introduction or microbial contamination, powered deployed in real time from a submersible. Additional design constraints include utilizing materials appropriate for sampling elevated temperatures, fitting into space available submersible, minimizing needed remove prepare re-deployment between dives. It utilizes two inlets, one devoted natural geochemistry that used pre-dosed isotopic labels preservatives. Temperature probes providing real-time data are incorporated each inlet facilitate positioning intake areas hottest flow, thereby entrainment ambient bottom seawater sampling. Fluids shunted main conduits by pump. Smaller ports stemming off conduit connect positive displacement sample chambers situ filters. outlets these filter holders connected 24-port valve, which turn small HOG successfully collected 100 high purity 50 filters during expeditions deep sea fields.