Results 51 to 60 of about 1,213,951 (200)

Thermodynamic Modeling of CO2-N2-O2-Brine-Carbonates in Conditions from Surface to High Temperature and Pressure

open access: yesEnergies, 2018
Nitrogen (N2) and oxygen (O2) are important impurities obtained from carbon dioxide (CO2) capture procedures. Thermodynamic modeling of CO2-N2-O2-brine-minerals is important work for understanding the geochemical change of CO2 geologic storage with ...
Jun Li, Raheel Ahmed, Xiaochun Li
doaj   +1 more source

Oxygen fugacity of Alto Paranaíba kimberlites and diamond instability: Três Ranchos IV and Limeira I intrusions

open access: yesBrazilian Journal of Geology, 2020
Oxygen fugacity (ƒO2) conditions were established for Três Ranchos IV (TR-IV, diamond-bearing) and Limeira I (LM-I, barren) kimberlite intrusions, in Alto Paranaíba Alkaline Province, to constrain a possible correlation between fO2 and diamond ...
Bruna Coldebella   +4 more
doaj   +1 more source

Apparatus for simultaneously measuring electrical conductivity and oxygen fugacity [PDF]

open access: yes, 1978
Electrical conductivity studies of silicates are useful in determining temperature vs depth in the earth. Realistic laboratory measurements of conduction mechanisms require that exact determinations of oxygen fugacity (fo{sub 2}) be made in the ...
Netherton, R., Duba, A.
core   +1 more source

The Wilson Cycle of the North Altyn Ocean: A Record of Subduction Initiation, Slab Rollback, and Final Closure

open access: yesGeochemistry, Geophysics, Geosystems
The North Altyn ophiolitic belt was formed by the subduction–closure of the Altyn segment of the Proto–Tethys Ocean and recorded the accretion of Tarim to northern Gondwana, but the timing of initial subduction and detailed tectonic transition processes ...
Long Chen   +8 more
doaj   +1 more source

Determining magmatic series and oxygen fugacity of volcanic rocks in the east of Kamu, north of Isfahan, based on biotite chemistry

open access: yesJournal of Economic Geology, 2014
Volcanic rocks of interest are situated in the middle part of the Urumieh-Dokhtar Magmatic Arc (UDMA). They are parts of a vast magmatic province located in the north of Bitlis-Zagros suture zone.
Mohammad Sayari   +2 more
doaj  

Redox control of the partitioning of platinum and palladium into magmatic sulfide liquids

open access: yesCommunications Earth & Environment
The partitioning behavior of platinum group elements in magmas is critical for their use as tracers of planetary accretion and in understanding magmatic sulfide deposits.
Wanying Wang, Yuan Li
doaj   +1 more source

Geophysical and atmospheric implications of fO2-dependent melting on rocky exoplanets

open access: yesAstronomy & Astrophysics
The geochemical evolution of long-lived magma oceans is strongly regulated by the volatile exchange between the molten mantle and the atmosphere. For planets inside the runaway-greenhouse limit, this coupled evolution can persist for billions of years ...
Sastre Mariana   +5 more
doaj   +1 more source

Dense hydrous silica carrying water to the deep Earth and promotion of oxygen fugacity heterogeneity

open access: yesMatter and Radiation at Extremes, 2022
Water has remarkable effects on the properties of mantle rocks, but, owing to the high temperatures in the mantle, uncertainties remain about how and how much water is transported into the deep Earth.
Yanhao Lin, Ho-Kwang Mao
doaj   +1 more source

EPMA Analysis of Hydrothermal Biotite from the Bangpu Porphyry Mo-Cu Deposit of Tibet, China and the Characteristics of Early Ore-forming Fluids

open access: yesYankuang ceshi, 2016
The chemical composition of hydrothermal biotite is important in revealing the physiochemical conditions and evolution of early ore-forming fluids. The Bangpu deposit is a large porphyry Mo(Cu) deposit in the eastern part of the Gangdese metallogenic ...
WANG Yong, TANG Ju-xing, WANG Li-qiang
doaj   +1 more source

Hydrothermal alteration of seafloor peridotites does not influence oxygen fugacity recorded by spinel oxybarometry

open access: yes, 2016
Publisher's PDFOlivine, orthopyroxene, and spinel compositions within seafloor peridotites yield important information about the nature of Earth’s mantle.
Cottrell, Elizabeth   +3 more
core   +1 more source

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