Fig. 3: Plots of Aurora hydrothermal plume composition.
a Location map for the trajectories of 11 CTD deployments over the Aurora mound, completed in 20146 projected over multibeam data from 201916 that is gridded at 20 m. Each CTD deployment was selected based on interpretation and prediction of ice-floe trajectories that dictated the direction of travel. Cumulative depth profiles are shown for b δ3He anomalies, c dissolved CH4 concentrations and d dissolved Mn concentrations, as measured in water samples collected during the CTD casts. Shading illustrates the depth range (2800–3700 m) of the non-buoyant hydrothermal plume.
