Results 11 to 20 of about 9,636,025 (200)
K-feldspar hygrochronology [PDF]
Geochimica et Cosmochimica Acta, 2013 Abstract The significance of the multi-isotopic record preserved in K-feldspars is assessed on samples from the Aar metagranite, Central Alps, Switzerland having very tight independent geological constraints. Stepwise leaching reveals that two diachronically grown K-feldspar generations coexist: Kfs-1 (⩾35 Ma old, Ca-poor, Rb–Cl-rich, with low 87Sr ...
VILLA, IGOR MARIA, Hanchar, JM
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The Thermoluminescence Parameters of Irradiated K-Feldspar
East European Journal of Physics, 2023 Isothermal decay of the TL glow curve has been studied at ambient temperature. Heating of feldspar at 600ºC leads to increased sensitivity of the samples upon irradiation for the whole range of glow curve.
Sahib Mammadov +3 more
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Thermoluminescence signal in K-feldspar grains: Revisited
Applied Radiation and Isotopes, 2015 Recent work has shown that infrared stimulated luminescence (IRSL) signals in sedimentary coarse-grain K-feldspars are derived mainly from high temperature thermoluminescence (TL) peaks around 400°C, and the fading components of the IRSL signal can be preferentially removed by prior IR stimulation at relatively low temperature.
Gelian, Gong, Weidong, Sun, Hongyun, Xu
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Alkali ion migration in albite and K-feldspar
Physics and Chemistry of Minerals, 2004 As part of a study of ion migration mechanisms in feldspars, the dynamical behaviour of the alkali metal cations ions in albite and K-feldspar has been investigated using a combination of dielectric spectroscopy and atomistic computer simulation techniques.
A. Jones +3 more
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Assessment of bleaching of K-feldspar grains
Radiation Measurements, 2001 Based on the difference in the bleaching rate between IRSL and TL signals, a new method of assessing the bleaching of sedimentary feldspar is proposed. All measurements for De and the bleaching factor (normalized ratio of IRSL to TL) are carried out on the same grain.
Tso, MYW, Zhang, JF, Li, S
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Nanoscopic feldspar islands on K-feldspar microcline (001)
Physical Chemistry Chemical PhysicsHigh-resolution atomic force microscopy on microcline (001) reveals nanoscopic islands, which have the same atomic structure as the terrace and are stable in contact with water. The islands were identified as an intrinsic feature of the surface.
Tobias Dickbreder +5 more
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A K-feldspar–liquid hygrometer specific to alkaline differentiated magmas [PDF]
Chemical Geology, 2015 We present a K-feldspar–liquid hygrometer specific to alkaline differentiated magmas that is calibrated through the regression analysis of sanidine and anorthoclase crystals coexisting with trachyte and phonolite melts. Partial-regression leverage plots were used to determine the minimum number of regression parameters that closely describe the ...
Mollo, Silvio +6 more
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Photoconductivity on K-feldspar [PDF]
International Journal of Modern Physics B, 2021 In the development of most phenomenological models used to explain the infrared excited luminescence, a major assumption is usually made in the degree of freedom the excited charge has. One of the two extremes is normally assumed: charge is free to move anywhere over the whole crystal, or it is confined close to the trap and the centers immediately ...
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Utilization of Vinasse and Feldspar as Alternative Sources of Potassium Fertilizers and Their Effect on Some Soil Properties and Crop Yield in Sandy Soils [PDF]
Journal of Soil Sciences and Agricultural Engineering, 2016 A field experiment was carried out for two successive seasons (winter season 2013/2014 and summer season 2014 ) on sandy soil at Ismailia Agric. Res. Station , Ismailia Governorate, Egypt (Latitude, 30o 35' 41.901" N and longitude, 32o 16' 45.834" E) to ...
Mona Kenawy, Mona Osman, Wafaa Seddik
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Sedimentology, sandstone provenance and palaeodrainage on the eastern Rockall Basin margin : evidence from the Pb isotopic composition of detrital K-feldspar [PDF]
, 2010 The Rockall Basin, west of Ireland, is a frontier area for hydrocarbon exploration but currently the age and location of sand fairways through the basin are poorly known.
Daly, J. Stephen +9 more
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