نتایج جستجو برای: oxygen fugacity
تعداد نتایج: 209048 فیلتر نتایج به سال:
We present the results of high pressure, temperature multiple saturation experiments at variable oxygen fugacity (fO2) conditions (IW+1.5 and IW−2.1) on three lunar titanium ultramafic glasses: Apollo 17 Orange glass (A17O, 9.1 wt% TiO2), 15 Red (A15R, 13.8 14 Black (A14B, 16.4 TiO2). performed in graphite (fO2 = IW+1.5) iron capsules. The experimentally determined points (MSPs) capsules are 2....
This study presents the first reconstruction of smelting conditions in 16th- to 18th-century smelters from Miedziana Góra (Holy Cross Mountains, Poland). Based on geochemical (inductively coupled plasma mass spectrometry/emission spectrometry, X-ray fluorescence) and mineralogical analysis (X-ray diffractometry, scanning electron microscopy, probe micro-analysis) historical slags, their chemica...
The changes of protein expression that are monitored in proteomic experiments are a type of biological transformation that also involves changes in chemical composition. Accompanying the myriad molecular-level interactions that underlie any proteomic transformation, there is an overall thermodynamic potential that is sensitive to microenvironmental conditions, including local oxidation and hydr...
Introduction: Recently, a lot of basaltic shergottites have been found from the desert areas in northern Africa and Middle East Asia. Most of them contain large olivine grains that are not present in the previously known basaltic shergottites (except for EETA79001). These olivine grains are mostly Mg-rich, but they show different mineralogical features in each meteorite. Dar al Gani 476 and its...
Abstract. The recycling of volatile and incompatible elements through the entire Earth's history is one most important processes for chemical evolution lithosphere. In this context, amphiboles are hydrous minerals playing a key role in differentiation crust–mantle system. We carried out amphibole–liquid partitioning (Amph/LD) experiments starting from alkali basalt with variable chlorine conten...
• Uranium solubility has been determined in soda-lime aluminosilicate glasses HR-XANES can be used to determine uranium oxidation states glass melt decreases the order U VI > V IV The hexavalent content is a key factor for melts of Na 2 O-CaO-Al O 3 -SiO system with two different Na/Ca ratios was studied at temperatures 1250–1400°C and under various redox conditions. A closed thermochemical rea...
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