Journal ArticleDOI
Diagenetic Albitization of K-Feldspar and Plagioclase in Sandstone Reservoirs: Thermodynamic and Kinetic Modeling
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In this article, three geochemical codes (DISSOL, THERMAL, and KINDIS) are used to simulate diagenetic albitization reactions in terms of fluid chemistry and temperature.Abstract:
Diagenetic albitization of K-feldspar and plagioclase is a common diagenetic phenomenon in numerous sedimentary basins. Three geochemical codes (DISSOL, THERMAL, and KINDIS) are used to simulate these albitization reactions in terms of fluid chemistry and temperature. The geochemical codes show that albitization of K-feldspar is enhanced by increasing temperature, and is most likely to occur at 120-150°C. Kinetic modeling of this reaction predicts the instability of quartz, which is generally considered a K-feldspar albitization product. Albitization of plagioclase is shown to decrease with increasing temperature. For low pCO2 conditions it probably occurs between temperatures of 60°C and 100°C, while for higher values of pCO2 it continues at temperat res greater than 100°C.read more
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The replacement of plagioclase feldspars by albite: observations from hydrothermal experiments
Jörn Hövelmann,Jörn Hövelmann,Andrew Putnis,Thorsten Geisler,Burkhard C. Schmidt,Ute Golla-Schindler +5 more
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Mineralogical and chemical variations in hypogene and supergene kaolin deposits in a mobile fold belt the Central Andes of northwestern Peru
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An empirically derived kinetic model for albitization of detrital plagioclase
Renee J. Perez,James R. Boles +1 more
TL;DR: In this article, an empirically derived model that estimates the extent of reaction for albitization of plagioclase as a function of time, grain surface area, and temperature from 0 to 200°C was proposed.