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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Trace element partitioning in basaltic systems as a function of oxygen fugacity. [PDF]
Contrib Mineral Petrol, 2023 AbstractAlong with temperature, pressure and melt chemistry, magmatic oxygen fugacity (fO2) has an important influence on liquid and solid differentiation trends and melt structure. To explore the effect of redox conditions on mineral stability and mineral-melt partitioning in basaltic systems we performed equilibrium, one-atmosphere experiments on a ...
Leuthold J, Blundy J, Ulmer P.
europepmc +4 more sources
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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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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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
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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The constant oxidation state of Earth’s mantle since the Hadean [PDF]
Nature CommunicationsDetermining the evolutionary history of mantle oxygen fugacity (fo2) is crucial, as it controls the fo2 of mantle-derived melts and regulates atmospheric composition through volcanic outgassing. However, the evolution of mantle fo2 remains controversial.
Fangyi Zhang +6 more
doaj +2 more sources
Redox variations in Mauna Kea lavas, the oxygen fugacity of the Hawaiian plume, and the role of volcanic gases in Earth’s oxygenation [PDF]
Proceedings of the National Academy of Sciences of the United States of America, 2017 Maryjo Brounce +2 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
doaj +1 more source
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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