Latitude-dependent oxygen fugacity in arc magmas [PDF]
Nature CommunicationsThe redox state of arc mantle has been considered to be more oxidized and diverse than that of the mid-ocean ridge, but the cause of the variation is debated.
Fangyang Hu +5 more
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Sulfur degassing at Erta Ale (Ethiopia) and Masaya (Nicaragua) volcanoes: Implications for degassing processes and oxygen fugacities of basaltic systems [PDF]
Geochemistry, Geophysics, Geosystems, 2013 We investigate the relationship between sulfur and oxygen fugacity at Erta Ale and Masaya volcanoes. Oxygen fugacity was assessed utilizing Fe3+/∑Fe and major element compositions measured in olivine‐hosted melt inclusions and matrix glasses.
J. M. deMoor +13 more
doaj +3 more sources
Europium in plagioclase-hosted melt inclusions reveals mantle melting modulates oxygen fugacity [PDF]
Nature CommunicationsTo gain insights into the composition and heterogeneity of Earth’s interior, the partial pressure of oxygen (oxygen fugacity, or fO2) in igneous rocks is characterized. A surprising observation is that relative to reference buffers, fO2s of mantle melts (
Nicholas Dygert +2 more
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A more reduced mantle beneath the lunar South Pole–Aitken basin [PDF]
Nature CommunicationsThe oxygen fugacity (fO2) of the lunar mantle is of pivotal significance in comprehending the formation and evolution of the Moon. However, the fO2 of the lunar farside mantle remains unknown due to the lack of samples returned from the farside. Here, we
Huijuan Zhang +16 more
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Trivalent titanium in high-titanium lunar ilmenite [PDF]
Nature CommunicationsLunar mare basalts are often rich in titanium, hosted predominantly within the mineral ilmenite (Fe2+Ti4+O3). Here, we examine ilmenite in a ~ 3.8 billion-year-old mare basalt (Apollo rock 75035) using high-resolution electron microscopy and electron ...
Advik D. Vira +15 more
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Determination of oxygen fugacity from ore-bearing magma responsible for Gazu copper mineralization: Cerium data in zircon mineral [PDF]
پترولوژی, 2021 Porphyry Cu deposits are typically oxidized. Oxygen fugacity (fO2) is a key factor, which controls the formation of porphyry Cu deposits. Trace element compositions of Cretaceous magmatic zircon grains (65.9-65.1 Ma) were determined from ore-bearing ...
Alireza Almasi +2 more
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Adsorption Science & Technology, 2022 The North Qilian orogenic belt is a typical area of “cold” subduction of the early Paleozoic oceanic plate, forming a series of high pressure and low temperature metamorphic rock assemblages. Among them, eclogite is a kind of protolith, which is basaltic
Feng Wang, Daorong Zhou, Xunhua Zhang
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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
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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
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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
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