Gray scale bathymetric map showing the location of basalt samples collected on myriad submersible and ROV dive programs, with colored circles indicating the ranges in MgO wt% from recent work by Gill. The most primitive (mafic: > 7.5% MgO) rocks, with highest melt temperatures are in the north were vent fields are more closely spaced. Sasquatch vent fluids also have the highest CO2 concentrations (not affected by diking events), while Mothra, to the south, historically has had the lowest CO2 concentrations (though there has been limited sampling at both fields; Proskurowski et al., 2004).
Media Type: Map
Investigator: Deborah Kelley