Compositions of chromite, associated minerals, and parental magmas of podiform chromite deposits: The role of slab contamination of asthenospheric melts in …
Podiform chromitites in the mantle sections of ophiolites belong to either high-Cr
(metallurgical) or high-Al (refractory) varieties. Their highly variable compositions are …
(metallurgical) or high-Al (refractory) varieties. Their highly variable compositions are …
Initial results from the Oman drilling project multi‐borehole observatory: Petrogenesis and ongoing alteration of mantle peridotite in the weathering horizon
PB Kelemen, JA Leong… - Journal of …, 2021 - Wiley Online Library
Abstract The Oman Drilling Project “Multi‐Borehole Observatory”(MBO) samples an area of
active weathering of tectonically exposed peridotite. This article reviews the geology of the …
active weathering of tectonically exposed peridotite. This article reviews the geology of the …
Compositional controls on hydrogen generation during serpentinization of ultramafic rocks
Where ultramafic rocks are exposed to water at temperatures< 400° C, they inevitably
undergo serpentinization reactions to form serpentine±brucite±talc±magnetite (in addition to …
undergo serpentinization reactions to form serpentine±brucite±talc±magnetite (in addition to …
Deserpentinization in subduction zones as a source of oxidation in arcs: A reality check
KA Evans, BR Frost - Journal of Petrology, 2020 - ieeexplore.ieee.org
Previous studies have concluded that dehydration of serpentinites in subduction zones
produces oxidizing fluids that are the cause of oxidized arc magmas. Here, observations of …
produces oxidizing fluids that are the cause of oxidized arc magmas. Here, observations of …
The process of serpentinization in dunite from New Caledonia
BR Frost, KA Evans, SM Swapp, JS Beard… - Lithos, 2013 - Elsevier
Abstract Dunite from New Caledonia displays three types of serpentine-dominated veins.
The earliest, type 1 veins are narrow (50–100 μm wide) and rarely extend across more than …
The earliest, type 1 veins are narrow (50–100 μm wide) and rarely extend across more than …
[PDF][PDF] Thermodynamic constraints on the geochemistry of low-temperature, continental, serpentinization-generated fluids
The hydrous alteration of ultramafic rocks, known as serpentinization, generates fluids that
can fuel microbial communities and enable the synthesis of simple organic compounds …
can fuel microbial communities and enable the synthesis of simple organic compounds …
Geological evidence for high H2 production from komatiites in the Archaean
The oxidation of iron from rocks during subaqueous alteration is a key source of the
molecular hydrogen (H2) used as an energy source by chemosynthetic organisms, which …
molecular hydrogen (H2) used as an energy source by chemosynthetic organisms, which …
Distinctive melt activity and chromite mineralization in Luobusa and Purang ophiolites, southern Tibet: constraints from trace element compositions of chromite and …
To investigate the factors controlling the mineralization in ophiolites we systematically
compared the petrology and mineral compositions of the harzburgites/lherzolites, dunites …
compared the petrology and mineral compositions of the harzburgites/lherzolites, dunites …
Effects of geodynamic setting on the redox state of fluids released by subducted mantle lithosphere
Magnetite breakdown during subduction of serpentinised ultramafic rocks may produce
oxidised fluids that oxidise the deep Earth and/or the sub-arc mantle, either via direct …
oxidised fluids that oxidise the deep Earth and/or the sub-arc mantle, either via direct …
Chapter 5 the Eocene subduction–obduction complex of New Caledonia
Convergence and subduction started in the Late Paleocene, to the east of New Caledonia in
the South Loyalty Basin/Loyalty Basin, leading to the formation of the Subduction–Obduction …
the South Loyalty Basin/Loyalty Basin, leading to the formation of the Subduction–Obduction …