Forsterite dissolution and magnesite precipitation at conditions relevant for deep saline aquifer storage and sequestration of carbon dioxide

The efficient long-term inhibition of forsterite dissolution by common soil bacteria and fungi at Earth surface conditions

“…Giammar et al, 2005;Oelkers et al, 2008;Prigiobbe et al, 2009;King et al, 2010;Daval et al, 2011;Guyot et al, 2011;Gudbrandsson et al, 2012;Saldi et al, 2013). The overall rate of olivine carbonation stems from the coupling of forsterite dissolution rates with Mg-carbonate precipitation rates.…”

“…Giammar et al, 2005;Oelkers and Schott, 2005;Bearat et al, 2006;Matter et al, 2007;Oelkers et al, 2008;Dufaud et al, 2009;Prigiobbe et al, 2009;Matter and Kelemen, 2009;King et al, 2010;Daval et al, 2011;Guyot et al, 2011;Broecker, 2012;Kohler et al, 2013;Gislason and Oelkers, 2014;Sissmann et al, 2014). This interest has led to a large number of studies aimed at characterizing forsterite dissolution behavior and rates at various fluid compositions and temperatures (Luce et al, 1972;Sanemasa et al, 1972, Grandstaff, 1978, 1986, Murphy and Helgeson, 1987, 1989Blum andLasaga, 1988, Banfield et al, 1990;Walther, 1991, 1992;Casey and Westrich, 1992, Awad et al, 2000, Chen and Brantley, 2000, Rosso and Rimstidt, 2000, Pokrovsky and Schott, 2000a, 2000b, Oelkers, 2001b, Giammar et al, 2005, Hänchen et al, 2006, Olsen and Rimstidt, 2008Davis et al, 2009;Rimstidt et al, 2012;Olsson et al, 2012;Plümper et al, 2012;Wang and Giammar, 2012;Garcia et al, 2013;<...>…”

“…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).…”

Sculpting of Rocks by Reactive Fluids

“…In fact, magnesite precipitation is so slow that it would likely also control the rate of magnesite formation at the expense of serpentine. An additional complicating factor is that the rate of magnesite nucleation at similar temperatures is also slow (Giammar et al, 2005;Hanchen et al, 2008). In fact, magnesium carbonate precipitation often does not occur until the saturation state has reached levels at which hydromagnesite (Mg 5 (CO 3 ) 4 (OH) 2 ×H 2 O) or other mixed carbonate-hydrate phases form.…”

Interface Induced Carbonate Mineralization: A Fundamental Geochemical Process Relevant to Carbon Sequestration

“…However, a closer look at these minerals indicates that rarely any obvious and predictive trend can be deduced concerning their water content. For example, it is widely known that tri-hydrated nesquehonite is the most commonly formed at ambient condition and magnesite only occurs at T > 60 -100 o C 2,3,4 . If higher T favors the dehydration as shown by the shift from tri-hydrate to anhydrate at increasing temperature, we would expected to see di-hydrate (barringtonite) or even mono-hydrate en route.…”