K-feldspar
Determining fluvial sediment virtual velocity on the Mojave River using K-feldspar IRSL: Initial assessment
... We propose to use natural luminescence of K-feldspar grains from samples along the Mojave River to estimate a virtual velocity of fine sediment transport.. The geography of the Mojave Ri[r] ...
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Bleaching of the post-IR IRSL signal from individual grains of K-feldspar: Implications for single-grain dating
... density-separated K-feldspar fractions of the samples used in this ...internal K-content of 10 ± 2% was applied for the K-feldspar fraction after Smedley et ...
10
Formation of K-feldspar megacrysts in granodioritic plutons by thermal cycling and late-stage textrual coarsening
... Fig. 11. Schematic model illustrating the size distribution of K-feldspar (gray rectangles, not to scale) from margin (left) to core (right) of the suite. Multiple individual emplacement pulses (marked by ...
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The ice-nucleating ability of quartz immersed in water and its atmospheric importance compared to K-feldspar
... the K-feldspar parameterization developed by Atkinson et ...the K-feldspar parameterization proposed here (solid red ...2018). K-feldspar was assumed to represent 20 % of the ...
19
Optimising the reproducibility of measurements of the post-IR IRSL signal from single-grains of K-feldspar for dating.
... location was performed at 290 °C. Comparing the different behaviours between grain (a) and (b) suggests that this effect was more pronounced in some grains in comparison to others; thus, the pIRIR signals of some of the ...
10
Salinity Dependent Adhesion Response Properties of Aluminosilicate (K Feldspar) Surfaces
... of K-feldspar, a member of the orthoclase family, a type of feldspar that weathers more slowly than members of the plagioclase series, and thus is more likely to be preserved in well sorted ...
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Efficiency of K-sulphate and K-feldspar Combined with Silicate Dissolving Bacteria on Yield and Nutrient Uptake by Maize Plants
... Data illustrated in Fig. 1 represent the values of available potassium (mg kg -1 ) in the treated soil with K-sulphate or K-feldspar inoculated with SDB during different periods after seeding (45, 90 ...
11
El Teniente porphyry coppermolybdenum deposit, Central Chile
... Samples of hydrothermal quartz for fluid inclusions analysis were grouped into five spatial domains: 1 the intense, pervasive Na-K-feldspar alteration zone, in and proximal to the dacite[r] ...
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Munnikhuis_unc_0153M_16542.pdf
... The development of K-feldspar megacrysts in granitoids is important to understanding plutonic and tectonic histories, yet their origin is still debated. Classically, these crystals have been thought to ...
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Quartz c-axis fabrics in constrictionally strained orthogneisses: implications for the evolution of the Orlica-Śnieżnik Dome, the Sudetes, Poland
... rodded K-feldspar and quartz grains/aggregates (Żelaźniewicz 1988; Cymerman 1997) of the Spalona gneisses (Text-figs 2A–B, 3A–B) show that deformation of these rocks occurred in the field of ap- parent ...
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Deformation of feldspar at greenschist facies conditions – the record of mylonitic pegmatites from the Pfunderer Mountains, Eastern Alps
... and K-feldspar were investigated in mylonitic peg- matites from the Austroalpine basement south of the west- ern Tauern Window by polarized light microscopy, electron microscopy and electron backscatter ...
22
Fluid inclusion and geochemical studies at the Emperor gold mines, Fiji
... Augite Olivine Plagioclase Magnetite Chlorite Dolomite d Quartz Sericite K-feldspar Adularia RoscOelite Calcite Pyritea b Fahlerz Chalcopyrite Sphalerite Tellurium Calaverite Krennerite [r] ...
334
Hydrogeochemistry of Bedrock Groundwater in SE Ivory Coast
... Ferromagnesian minerals had 5.6 x 10 -5 – 2.0 x 10 -4 mol L -1 concerning chlorites, 4.4–9.0 x 10 -5 mol L -1 for biotite and ~1.2 x 10 -8 mol L -1 for amphiboles. These rates from the models have to be improved in ...
14
Links between metamorphism and deformation in feldspar at mid-crustal conditions
... of K-feldspar grains at opening sites along grain boundaries in disintegrating quartz aggregates, which pinned the quartz grain size, promoted GBS and led to a transition from dislocation to diffusion ...
213
Cambrian granite related hydrothermal alteration and Cu Au mineralisation in the southern Mt Read volcanics, Western Tasmania, Australia
... Hydrothermal sericite, chlorite and K-feldspar alteration styles occur throughout a 15 km X 3 km zone that extends northward from the Darwin Granite to the Jukes Prospect and regional ae[r] ...
337
OSL-thermochronometry of feldspar from the KTB borehole, Germany
... a K-poor feldspar phase, where the internal potassium (black dots) is homogeneously distributed within the entire grain, with luminescence arising from the entire grain as ...multiphase feldspar ...
23
OSL-thermochronometry of feldspar from the KTB borehole, Germany
... of feldspar was deemed unnecessary as the contribution of quartz to lumi- nescence signals used in feldspar IRSL dating is negligible (Sohbati et ...Since K- feldspar is extremely rare in the ...
15
Geological, Alteration and Mineralization Characteristics of Ali Javad Porphyry Cu Au Deposit, Arasbaran Zone, NW Iran
... metasomatic K-feldspar) which turns outward into phyllic alteration (sericite + quartz), propylitic (epidote + chlorite + albite) and argillic which finally ends into unaltered rocks ...
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Phosphogypsum waste as additives to lime stabilization of bentonite
... The XRD spectrum of bentonite shows a dominance of smectite with characteristics diffraction peaks at 6.2, 19.9, 27.7 and 34.6 2 θ (Fig. 1). K-feldspar and plagioclase with small amount of quartz form this ...
10
El Teniente porphyry coppermolybdenum deposit, Central Chile
... Biotite and Na-K-feldspar stable vein assemblages stage 2a, 2b, 2c, 2d, 2e veins and breccias occur in the potassic zone in the deposit centre, whereas sericite - chlorite stable vein as[r] ...
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