Results 41 to 50 of about 127,546 (339)

CO2-crystal wettability in potassic magmas. Implications for eruptive dynamics in light of experimental evidence for heterogeneous nucleation. [PDF]

open access: yes, 2017
The volatile content in magmas is fundamental for the triggering and style of volcanic eruptions. Carbon dioxide, the second most abundant volatile component in magmas after H2O, is the first to reach saturation upon ascent and depressurization.
Fanara, S.   +4 more
core   +1 more source

Coupled mineral alteration and oil degradation in thermal oil-water-feldspar systems and implications for organic-inorganic interactions in hydrocarbon reservoirs

open access: yesGeochimica et Cosmochimica Acta, 2019
Organic-inorganic interactions after oil charging are critical for determining the ongoing evolution of hydrocarbons and rock quality in water-wet siliciclastic reservoirs.
G. Yuan   +10 more
semanticscholar   +1 more source

The structure and petrology of the Cnoc nan Cuilean Intrusion, Loch Loyal Syenite Complex, NW Scotland [PDF]

open access: yes, 2013
In NW Scotland, several alkaline intrusive complexes of Silurian age intrude the Caledonian orogenic front. The most northerly is the Loch Loyal Syenite Complex, which is divided into three separate intrusions (Ben Loyal, Beinn Stumanadh and Cnoc nan ...
Goodenough, Kathryn M.   +5 more
core   +3 more sources

Metamorphic and metasomatic evolution of the Western Domain of the Karagwe-Ankole Belt (Central Africa) [PDF]

open access: yes, 2020
The tectonometamorphic evolution of the Western Domain of the Karagwe-Ankole Belt, containing widespread granite-related W-Nb-Ta-Sn mineralization in pegmatites and hydrothermal quartz veins of Early Neoproterozoic age, is largely unknown.
Dewaele, Stijn   +3 more
core   +1 more source

Comparing the accuracy and precision of luminescence ages for partially-bleached sediments using single grains of K-feldspar and quartz

open access: yesQuaternary Geochronology, 2019
Glacial settings are considered to be the most challenging context for the application of luminescence dating. The optically stimulated luminescence (OSL) signal of quartz is often preferred for luminescence dating in partially-bleached settings as it ...
R. Smedley, J. Buylaert, G. Újvári
semanticscholar   +1 more source

Evaluation of laboratory methodologies for froth flotation of feldspar and kaolin [PDF]

open access: yes, 1994
This report describes work carried out to establish and evaluate methodologies for the laboratory froth flotation of feldspar and kaolin. One of the main aims was to ascertain the feasibility of separating glass-grade feldspar from granite quarry dust ...
Mitchell, C.J.
core  

Neon diffusion kinetics and implications for cosmogenic neon paleothermometry in feldspars [PDF]

open access: yes, 2017
Observations of cosmogenic neon concentrations in feldspars can potentially be used to constrain the surface exposure duration or surface temperature history of geologic samples.
Balco, Greg   +3 more
core   +1 more source

Effect of Temperature and Atmosphere on Agglomeration of Bed Particles in a Bubbling Fluidised Bed Burning Na‐Enriched Coal

open access: yesAsia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT Agglomeration of bed materials during circulating fluidised bed (CFB) combustion or gasification of high‐alkali fuel is a practical challenge in industrial practice. This work investigates experimentally the effect of temperatures (700°C–900°C) and atmosphere (air equivalence ratios 1.61–0.53) on agglomeration in a lab‐scale bubbling fluidised
Zipeng Guo   +4 more
wiley   +1 more source

Peningkatan kadar kalium (K) pada Feldspar dengan metode pertukaran Ion sistem kolom [PDF]

open access: yes, 2005
Feldspar banyak digunakan sebagai bahan pelebur pada industri keramik, salah satu syarat utarnanya adalah kadar kalium di dalamnya harus Iebih tinggi daripada kadar kalsium.
Pratiwi , Ika Budi
core  

Potassium Migration of Chestnut Shell Ashes Under Oxidizing Atmosphere and Its Modification Mechanism by Additives

open access: yesAsia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT Biomass energy plays a critical role in alleviating environmental pressures. However, its relatively high content of alkali metals (especially for potassium) would cause ash‐related issues during combustion. To mitigate these issues, the potassium migration behaviors during chestnut shell (CS) conversion and the modification mechanisms of ...
Meijie Zhou   +6 more
wiley   +1 more source

Home - About - Disclaimer - Privacy