Iron Isotope Fractionation and the Oxygen Fugacity of the Mantle
Science, 2004 The oxygen fugacity of the mantle exerts a fundamental influence on mantle melting, volatile speciation, and the development of the atmosphere. However, its evolution through time is poorly understood. Changes in mantle oxidation state should be reflected in the Fe 3+ /Fe 2+ of mantle ...
Williams, H +6 more
core +7 more sources
Constraints on oxygen fugacity within metal capsules [PDF]
Physics and Chemistry of Minerals, 2017 Experiments were conducted with olivine encapsulated or wrapped in five different metals (Pt, Ni, $$\hbox {Ni}_{70}\hbox {Fe}_{30}$$ , Fe, and Re) to determine the oxygen fugacity in the interior of large ...
Ulrich H. Faul +4 more
core +5 more sources
High‐Pressure Na‐Ca Carbonates in the Deep Carbon Cycle
Geophysical Monograph Series, Page 127-136., 2020 This book is Open Access. A digital copy can be downloaded for free from Wiley Online Library.
Explores the behavior of carbon in minerals, melts, and fluids under extreme conditions
Carbon trapped in diamonds and carbonate-bearing rocks in subduction zones are examples of the continuing exchange of substantial carbon ...
Sergey Rashchenko +2 more
wiley +10 more sources
Oxygen Fugacity Buffers and an Interactive Calculator
Geochemistry, Geophysics, GeosystemsOxygen fugacity buffers are equilibrium phase assemblages that constrain the chemical potential of oxygen. They may be coexisting minerals or fluids, or their metastable extrapolations.
Michael Anenburg
doaj +2 more sources
Sensibility of Tourmaline Chemistry to Granitic Magma Composition and Oxygen Fugacity [PDF]
, 2022 Extensive granitic magmatism is a dominant feature of the Central Iberian Zone (CIZ) of the Variscan Orogen. For the most part, these are S-type peraluminous granitic rocks exhibiting variable degrees of evolution and compositions ranging from granodiorites, through mon zogranites and granites to leucogranites, bearing either biotite and muscovite, or ...
Ribeiro da Costa, Isabel +1 more
openaire +4 more sources
A fugacity approach for generating a landfill gas trace component source term. [PDF]
, 2005 The quality of risk assessment output is determined by the input data used in environmental distribution, dispersion and exposure models. Whilst recent focus has been on the development of regulatory exposure assessment models for landfills, risk ...
Rosevear, Alan +4 more
core +7 more sources
Earth’s past and present mantle oxygen fugacity
Nature Reviews Earth & EnvironmentOxygen is the most abundant element in Earth’s mantle. Oxygen fugacity (fO2), which quantifies the availability of oxygen to mediate oxidation–reduction reactions, affects important mantle processes, such as depth of melting, extraction of volatiles to the atmosphere, crustal composition and ore body generation.
Elizabeth Cottrell +4 more
core +7 more sources
The effect of oxygen fugacity on the solubility of carbon-oxygen fluids in basaltic melt
Earth and Planetary Science Letters, 1992 The solubility of CO2CO fluids in a mid-ocean ridge basalt (morb) has been measured at 1200°C, 500-1500 bar, and oxygen fugacities between NNO and NNO-4. High oxygen fugacities, and thus CO2-rich fluids, were produced by using a starting material equilibrated at NNO, and Ag2C2O4 as the fluid source. Low oxygen fugacities were achieved by using graphite
Pawley, Alison R.; id_orcid 0000-0002-3022-3235 +2 more
openaire +2 more sources
Trace element partitioning in basaltic systems as a function of oxygen fugacity. [PDF]
Contrib Mineral Petrol, 2023 Abstract Along with temperature, pressure and melt chemistry, magmatic oxygen fugacity ( f O 2 ) has an important influence on liquid and solid differentiation trends and melt structure.
Leuthold J, Blundy J, Ulmer P.
europepmc +4 more sources
Geophysical Monograph Series, Page 117-131., 2021 Exploring the links between Large Igneous Provinces and dramatic environmental impact
An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Benjamin Black +4 more
wiley +1 more source