2008
DOI: 10.1016/j.gca.2007.09.031
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Characterization of leached layers on olivine and pyroxenes using high-resolution XPS and density functional calculations

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Cited by 74 publications
(38 citation statements)
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“…and Mg 2? in the enstatite structure, followed by the relatively slow detachment of silica from partially liberated tetrahedral chains (Oelkers and Schott 2001;Oelkers et al 2009;Zakaznova-Herzog et al 2008). Enstatite is believed to exchange about 3.1 hydrogen atoms for each Mg at the reacting sites, following Eq.…”
Section: Plagioclase Reactivitymentioning
confidence: 99%
“…and Mg 2? in the enstatite structure, followed by the relatively slow detachment of silica from partially liberated tetrahedral chains (Oelkers and Schott 2001;Oelkers et al 2009;Zakaznova-Herzog et al 2008). Enstatite is believed to exchange about 3.1 hydrogen atoms for each Mg at the reacting sites, following Eq.…”
Section: Plagioclase Reactivitymentioning
confidence: 99%
“…Mg was observed to be preferentially released relative to Si from the forsterite surface during the initial stages of its dissolution at acidic pH (Seyama et al, 1996;Schott, 2000a, 2000b;Zakaznova-Herzog et al 2008;Oelkers et al, 2009;King et al, 2011). This behavior can result in the formation of a Si-enriched surface layer that may polymerize and influence dissolution rates; Daval et al (2011) reported that forsterite dissolution rates decrease as acidic CO 2 -rich fluids become saturated with respect to amorphous silica, similar to the behavior previously observed for multi-component mineral and glass dissolution (e.g.…”
Section: Introductionmentioning
confidence: 99%
“…In addition, the dissolving olivine surface can become covered by secondary minerals and/or bacteria (c.f. Giammar et al, 2005;Zakaznova-Herzog et al 2008;Olssen et al, 2012;Wang and Giammar, 2012;Hövelmann et al, 2013;Saldi et al, 2013). The degree to which secondary surface precipitates affect the dissolution rates of the primary mineral appears to depend on the structural match between the two minerals and the presence of interconnected porous pathways in the secondary phases (Hodson, 2003;Cubillas et al, 2005;Putnis, 2009;Stockmann, 2011Stockmann, , 2013Saldi et al, 2013).…”
Section: Introductionmentioning
confidence: 99%
“…Given the high reactivity of olivine, the surface chemistry and dissolution kinetics have been studied under a broad range of experimental conditions, including closedsystem (Giammar et al, 2005;King et al, 2010;Daval et al, 2011) and well-mixed flow-through dissolution experiments on powdered olivine samples (Pokrovsky and Schott, 2000b;Oelkers, 2001), as well as single crystals (Jarvis et al, 2009;Saldi et al, 2013). Characterization of the reaction products has also included a range of techniques, such as X-ray photoelectron spectroscopy (Pokrovsky and Schott, 2000a;Zakaznova-Herzog et al, 2008;Olsson et al, 2012), infrared spectroscopy (Pokrovsky and Schott, 2000a;Giammar et al, 2005;Loring et al, 2011), transmission electron microscopy (Bearat et al, 2006;Daval et al, 2011) and atomic force microscopy (King et al, 2014). Despite the range of studies focused on olivine reactivity in the presence of aqueous solutions, predictive models for olivine dissolution are subject to large uncertainties (Daval et al, 2011;Rimstidt et al, 2012).…”
Section: Introductionmentioning
confidence: 99%