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K.G. Jebsen Centre for Deep Sea Research

Geochemistry of novel vent fluids from the newly discovered 72.7°N ("NPD/Hel") hydrothermal system on the Arctic mid ocean ridge

MSc project of Chanakan Boonnawa

Project title

Geochemistry of novel vent fluids from the newly discovered 72.7°N ("Fåvne") hydrothermal system on the Arctic mid ocean ridge

Supervisors

Eoghan P. Reeves, Thibaut Barreyre

Project description

In 2019, vent fluid samples were retrieved by the ROV Ægir from the recently discovered vent field “Fåvne” at 72.7° N on the Arctic mid-ocean ridge. Studying the geochemical composition of these vent fluids is a crucial aspect of further understanding the subsurface geologic processes as well as near-surface microbiological strategies occurring in this novel vent system. This project mainly aims to investigate geochemical properties of these fluid samples and the influences on fluid chemistry at this system through the comprehensive analysis of dissolved gases, major and minor cations and anions, as well as trace metals and stable C and Sr isotopes. These results will be used to compare with the other vent fields globally that have already been studied thoroughly. By doing so, we will get a better understanding of this newly discovered vent system and the geologic controls that shape its geochemistry and microbial community.