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Minerals, Volume 9, Issue 11
November 2019 - 69 articles
Cover Story: The mineralization potential for CO2 in a given siliciclastic sandstone aquifer is controlled by mineralogy, available reactive surface area and thermodynamics. Simulation examples show how reaction potentials vary in different sedimentary facies: higher in fine-grained sand, where Na-rich plagioclase and Fe-chlorite are the main cation donors for carbonatization. Reactivity decreases with higher relative fractions of ooidal clay and intact perthites in the reactive assembly, with smaller fluid-mineral contact area. Petrographic characterization is crucial for assigning total reactive surface area to bulk mineral weight fractions in geochemical simulations. Sensitivity studies of mineral occurrence with associated available surface areas and kinetics are relevant in evaluation of trapping potential, as much as variations in solubility on decennial time scales. View this paper
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Minerals - ISSN 2075-163X