Browsing by Title
- DSpace Home
- →
- Browsing by Title
JavaScript is disabled for your browser. Some features of this site may not work without it.
Browsing by Title
Now showing items 12257-12276 of 39126
-
(2003)The transfer of fluid and elements from subducting crust to the overlying mantle wedge is a fundamental process affecting arc magmatism and the chemical differentiation of the Earth. While the production of fluid by breakdown ...
-
(1990)The authors with alkali basalts of two different compositions, representing different degrees of differentiation, from the same basalt-rhyolite series of Iceland. The experiments were performed in an apparatus in which the ...
-
(1992)We have investigated redox systematics in the upper mantle under continents and ocean islands, using data on olivine, orthopyroxene, and spinel from both spinel lherzolites and coexisting pyroxenite xenoliths. Calculated ...
-
(2006)Olivine/melt partitioning of ?Fe, Fe2+, Mg2+, Ca2+, Mn2+, Co2+, and Ni2+ has been determined in the systems CaO-MgO-FeO-Fe2O3-SiO2 (FD) and CaO-MgO-FeO-Fe2O3-Al2 O3-SiO2 (FDA3) as a function of oxygen fugacity (fO2) at 0.1 ...
-
(PANGAEA, 2019-08-16)The Black Sea repeatedly experienced major hydrographic changes during glacial-interglacial transitions, with alternating limnic and brackish stages. While the redox conditions during the present Holocene brackish period ...
-
(1990)The oxygen fugacity is one of the key factors governing mineral equilibria in the mantle. Of particular importance, it governs the composition of mantle fluids and thus their ability to dissolve minerals or to themselves ...
-
REDOX POTENTIAL MEASUREMENTS AND MöSSBAUER SPECTROMETRY OF FEII ADSORBED ONTO FEIII (OXYHYDR)OXIDES (2005)The redox properties of FeII adsorbed onto a series of FeIII (oxyhydr)oxides (goethite, lepidocrocite, nano-sized ferric oxide hydrate (nano-FOH), and hydrous ferric oxide (HFO)) have been investigated by rest potential ...
-
(2005)The water column chemistry of lake St Eloy (St Eloy-les Mines, Allier, France) was monitored over a period of a year. This is a small stratified lake created by subsidence of an underground coal mine. The results show a ...
-
(1996)Oil-rock-water reactions in hydrocarbon reservoirs were evaluated experimentally. Hematitic Tensleep Sandstone samples of 10-20 cm3 were heated with 200 ml of deionized water and 100 ml of petroleum for 3-14 days at ...
-
(1998)P-T-fO2 conditions and fluid compositions were estimated from mineral paragenesis from inclusions in diamonds, diamond-bearing, and diamond-free xenoliths using garnet-orthopyroxene barometers and olivine-orthopyroxene-garnet ...
-
(1998)P-T-fO2 conditions and fluid compositions were estimated from mineral paragenesis from inclusions in diamonds, diamond-bearing, and diamond-free xenoliths using garnet-orthopyroxene barometers and olivine-orthopyroxene-garnet ...
-
(2004)As measured in air above the glass transition range, the viscosity of an alkali basalt increases markedly with time by about two orders of magnitude in 12 h. This effect is essentially physical and due to the presence of ...
-
(1993)The oxidation state of lithospheric upper mantle is heterogeneous on a scale of at least four log units. Oxygen fugacities ( fO2 f_{O_2 } ) relative to the FMQ buffer using the olivine-orthopyroxene-spinel equilibrium range ...
-
(1998)Mangrove forest sediments can provide a sink for trace metals because the mangroves create a baffle that promotes the accumulation of fine-grained organic matter-rich sediment, which is usually sulphidic due to the presence ...
-
(1996)The concept of redox zonation during degradation of organic matter, which is usually explained by the overall energy yield of different reactions, has been reevaluated. At least for reduction of Mn(IV), Fe(III), sulfate, ...
-
(2006)Electron transfer between redox active proteins and mineral oxides is important in a variety of natural as well as technological processes, including electron transfer from dissimilatory metal-reducing bacteria to minerals. ...
-
(2015)Abstract Historical basaltic eruptions of Tolbachik volcano (Kamchatka) are of a medium to high potassic type. The potassic character of magmatism can be attributed to the influence of CO2–CO-rich fluid at or near the magma ...
-
(1988)Judging by petrographic and f-radiographic data, a feature specific to such fluid is the presence in it of uranium. That explains why different categories of carbon compounds, generated as a result of its breakdown, also ...
-
(2003)Mining applications commonly faces surprising high values designated as outliers. These values impact dramatically statistical analysis and interpretation. A comprehensive analysis on the causes for the presence of unexpected ...
Now showing items 12257-12276 of 39126