Oxidation-induced nanolite crystallization triggered the 2021 eruption of Fukutoku-Oka-no-Ba, Japan
Scientific Reports, 2023 Nanometer-sized crystals (nanolites) play an important role in controlling eruptions by affecting the viscosity of magmas and inducing bubble nucleation.
Kenta Yoshida +10 more
doaj +1 more source
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
Estimation of physicochemical properties and tectonic environment of gabbro masses from south of Germi city (Ardabil province) based on the chemistry of clinopyroxene crystals [PDF]
پترولوژی, 2018 The studied gabbroic rocks, trending northwest- southeast, outcropped in the south of Germi, northwest of Iran. These rocks composed of plagioclase, clinopyroxene and iddingsitic olivines.
gholamreza ahmadzadeh +1 more
doaj +1 more source
A new method to quantitatively control oxygen fugacity in externally heated pressure vessel experiments [PDF]
European Journal of Mineralogy, 2020 Oxygen fugacity (fO2) is a fundamental variable affecting phase equilibrium in magmas, and in externally heated pressure vessel experiments it is typically controlled by using redox buffer assemblages.
A. Alex, Z. Zajacz
doaj +1 more source
Frontiers in Earth Science, 2022 Aqueous magmatic fluids are essential to the transport of hydrogen (H), carbon (C), and nitrogen (N) from the mantle to the surface, during which changes in pressure, temperature, and redox conditions affect the chemical speciation and intermolecular ...
Celia Dalou +3 more
doaj +1 more source
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
openaire +5 more sources
Geologia Croatica, 2016 The Trepča Pb-Zn-Ag skarn deposit in Kosovo is spatially and temporarily related to the phreatomagmatic breccia of Oligocene age (~23 Ma). The deposit shows features typical for skarn deposits worldwide, including a stage of isochemical metamorphism, a ...
Sabina Strmić Palinkaš +6 more
doaj +1 more source
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
openaire +2 more sources
The effect of oxygen fugacity on ionic conductivity in olivine
Geoscience Frontiers, 2022 Abstract The oxygen fugacity ( f O 2 ) may affect the ionic conductivity of olivine under upper mantle conditions because Mg vacancies can be produced in the crystal structure by the oxidization of iron from Fe2+ to Fe3+. Here we investigated olivine ionic conductivity at 4 GPa, as a function of temperature, crystallographic orientation ...
Hongzhan Fei, Tomoo Katsura
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Anais da Academia Brasileira de Ciências, 2014 Subduction zone or arc magmas are known to display a characteristic depletion of High Field Strength Elements (HFSE) relative to other similarly incompatible elements, which can be attributed to the presence of the accessory mineral rutile (TiO2) in the ...
GUILHERME MALLMANN +2 more
doaj +1 more source