6 Result(s)
within
Esther M. Schwarzenbach
-
Article
Open AccessSlab-derived devolatilization fluids oxidized by subducted metasedimentary rocks
Metamorphic devolatilization of subducted slabs generates aqueous fluids that ascend into the mantle wedge, driving the partial melting that produces arc magmas. These magmas have oxygen fugacities some 10–1,0...
-
Article
Open AccessUncovering and quantifying the subduction zone sulfur cycle from the slab perspective
Sulfur belongs among H2O, CO2, and Cl as one of the key volatiles in Earth’s chemical cycles. High oxygen fugacity, sulfur concentration, and δ34S values in volcanic arc rocks have been attributed to significant ...
-
Article
Open AccessSulphur and carbon cycling in the subduction zone mélange
Subduction zones impose an important control on the geochemical cycling between the surficial and internal reservoirs of the Earth. Sulphur and carbon are transferred into Earth’s mantle by subduction of pelag...
-
Article
Open AccessEffect of water activity on rates of serpentinization of olivine
The hydrothermal alteration of mantle rocks (referred to as serpentinization) occurs in submarine environments extending from mid-ocean ridges to subduction zones. Serpentinization affects the physical and che...
-
Article
Serpentinization, element transfer, and the progressive development of zoning in veins: evidence from a partially serpentinized harzburgite
Serpentinization is an important geochemical process that affects the chemistry and petrophysical properties of the oceanic lithosphere and supports life through abiogenic formation of hydrogen. Here, we docu...
-
Article
Hydrothermal processes in partially serpentinized peridotites from Costa Rica: evidence from native copper and complex sulfide assemblages
Native metals and metal alloys are common in serpentinized ultramafic rocks, generally representing the redox and sulfur conditions during serpentinization. Variably serpentinized peridotites from the Santa El...
