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Gradients in the composition of hydrothermal fluids from the Endeavour segment vent field: Phase separation and brine loss
Hydrothermal fluid samples collected in 1984, 1987, and 1988 from a large vent field near 47°57′N on the Endeavour segment of the Juan de Fuca Ridge (JFR) have been analyzed for major and minorExpand
Fluid and geochemical transport through oceanic crust: a transect across the eastern flank of the Juan de Fuca Ridge
Abstract The geochemical implications of thermally driven flow of seawater through oceanic crust on the mid-ocean ridge flank have been examined on a well-studied 80 km transect across the easternExpand
Geomicrobiology of Deep-Sea Hydrothermal Vents
TLDR
Bacteria grow most abundantly in the shallow crust where upwelling hot, reducing hydrothermal fluid mixes with downwelling cold, oxygenated seawater, but the predominant production of biomass is the result of symbiotic associations between chemolithotrophic bacteria and certain invertebrates, which have also been found in Cretaceous sulfide ores of ophiolite deposits. Expand
Deep‐slab fluids fuel extremophilic Archaea on a Mariana forearc serpentinite mud volcano: Ocean Drilling Program Leg 195
[1] As the Pacific plate subducts beneath the Mariana forearc it releases water that hydrates the overlying mantle wedge, converting it to serpentinite that protrudes to form mud volcanoes at theExpand
Chemistry of springs across the Mariana forearc shows progressive devolatilization of the subducting plate
Abstract Cold springs upwelling through large serpentinite mud volcanoes in the outer half of the Mariana forearc provide a unique window into processes of devolatilization of the subducting PacificExpand
Chemistry of hot springs along the Eastern Lau Spreading Center
Abstract The Eastern Lau Spreading Center (ELSC) is the southernmost part of the back-arc spreading axis in the Lau Basin, west of the Tonga trench and the active Tofua volcanic arc. Over its 397-kmExpand
HYDROTHERMAL CIRCULATION THROUGH MID-OCEAN RIDGE FLANKS : FLUXES OF HEAT AND MAGNESIUM
Thermally driven convection of seawater occurs through oceanic crust of all ages, at the seafloor spreading axis, on mid-ocean ridge flanks, and in the ocean basins. At the ridge axis and on theExpand
Mariana blueschist mud volcanism: Implications for conditions within the subduction zone
Several recently discovered active mud volcanoes on the nonaccretionary Mariana convergent plate margin are erupting slab-derived fluids, serpentine mud, and metamorphosed rocks from depths of asExpand
21. PORE WATERS FROM SERPENTINITE SEAMOUNTS IN THE MARIANA AND IZU-BONIN FOREARCS, LEG 125: EVIDENCE FOR VOLATILES FROM THE SUBDUCTING SLAB1
Sediment pore fluids sampled by drilling in subduction zones are commonly depleted in chloride relative to seawater and highly enriched in methane. These features have been attributed to processesExpand
Alteration of the oceanic crust: Implications for geochemical cycles of lithium and boron
Abstract Fresh tholeiitic basalt glass has been reacted with seawater at 150°C, (water/rock mass ratio of 10), and fresh diabase has been reacted with a Na-K-Ca-Cl fluid at 375°C (water/rock massExpand
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