The hydromagnesite playas of Atlin, British Columbia, Canada: A biogeochemical model for CO2 sequestration

Power, Ian M.; Wilson, Siobhan A.; Thom, J.; Dipple, Gregory M.; Gabites, Janet; Southam, Gordon

doi:10.1016/j.chemgeo.2009.01.012

Cited by 125 publications

(136 citation statements)

References 53 publications

(72 reference statements)

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“…Formation of hydromagnesite, however, in natural environments (e.g. Lake Salda, Turkey; British Columbia, Canada) likely occurs at significantly lower temperatures, similar to those of our experiments (Braithwaite and Zedef, 1994;Power et al, 2007Power et al, , 2009). The results above suggest that, at ambient temperatures, the transformation from nesquehonite to hydromagnesite occurs via a dypingite intermediary both in the laboratory and in nature.…”

Section: Magnesium Isotopic Compositionsupporting

confidence: 60%

“…Cyanobacteria induced mineralization occurred in both ancient and modern environments (Brady et al, 2009;Planavsky et al, 2009;Raven and Giordano, 2009); cyanobacteria-dominated carbonate formation occurred in oceans, lakes, springs, and soils during the Precambrian (Riding, 2000), whilst modern cyanobacteria-dominated carbonate formation occurs in highly alkaline aquatic environments (Thompson and Ferris, 1990;Braithwaite and Zedef, 1994;Dupraz et al, 2009;Power et al, 2009). Locations where modern cyanobacteria-dominated magnesium carbonate formation occurs include Lake Salda in Turkey, which is fed by ultramafic rock weathering products (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Locations where modern cyanobacteria-dominated magnesium carbonate formation occurs include Lake Salda in Turkey, which is fed by ultramafic rock weathering products (e.g. Braithwaite and Zedef, 1994;Shirokova et al, 2011), and alkaline lakes such as those in British Columbia (Power et al, 2007(Power et al, , 2009.…”

Section: Introductionmentioning

confidence: 99%

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Magnesium isotope fractionation during hydrous magnesium carbonate precipitation with and without cyanobacteria

Mavromatis

Pearce

Shirokova

et al. 2012

Geochimica et Cosmochimica Acta

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How to cite:Mavromatis, Vasileios; Pearce, Christopher R.; Shirokova, Liudmila S.; Bundeleva, Irina A.; Pokrovsky, Oleg S.; Benezeth, Pascale and Oelkers, Eric H. (2012) AbstractThe hydrous magnesium carbonates, nesquehonite (MgCO 3 Á3H 2 O) and dypingite (Mg 5 (CO 3 ) 4 (OH) 2 Á5(H 2 O)), were precipitated at 25°C in batch reactors from aqueous solutions containing 0.05 M NaHCO 3 and 0.025 M MgCl 2 and in the presence and absence of live photosynthesizing Gloeocapsa sp. cyanobacteria. Experiments were performed under a variety of conditions; the reactive fluid/bacteria/mineral suspensions were continuously stirred, and/or air bubbled in most experiments, and exposed to various durations of light exposure. Bulk precipitation rates are not affected by the presence of bacteria although the solution pH and the degree of fluid supersaturation with respect to magnesium carbonates increase due to photosynthesis. Lighter Mg isotopes are preferentially incorporated into the precipitated solids in all experiments. Mg isotope fractionation between the mineral and fluid in the abiotic experiments is identical, within uncertainty, to that measured in cyanobacteriabearing experiments; measured d 26 Mg ranges from À1.54& to À1.16& in all experiments. Mg isotope fractionation is also found to be independent of reactive solution pH and Mg, CO 3 2À , and biomass concentrations. Taken together, these observations suggest that Gloeocapsa sp. cyanobacterium does not appreciably affect magnesium isotope fractionation between aqueous fluid and hydrous magnesium carbonates.

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Section: Magnesium Isotopic Compositionsupporting

confidence: 60%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Magnesium isotope fractionation during hydrous magnesium carbonate precipitation with and without cyanobacteria

Mavromatis

Pearce

Shirokova

et al. 2012

Geochimica et Cosmochimica Acta

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“…The next unexpected observation is the fact that Alchichica belongs to the few lakes that produce hydromagnesite or hydromagnesite-magnesite microbialites (e.g., Renaut 1993;Braithwaite and Zedef 1994;Russell et al 1999;Power et al 2009). Alchichica's ''white'' microbialites turn out to be very similar to Holocene stromatolites from the alkaline lake Walyungup in Western Australia (Coshell et al 1998).…”

Section: Discussionmentioning

confidence: 99%

Hydrochemistry and microbialites of the alkaline crater lake Alchichica, Mexico

Kaźmierczak

Kempe

Kremer

et al. 2011

Facies

107

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The structure, mineralogy, and accretion processes of the modern and subfossil cyanobacterial microbialites from the alkaline crater lake Alchichica (Puebla, Mexico) were studied, along the lake's bathymetry and hydrochemistry. The recent lowering of the lake level had exposed microbialitic carbonate mounds and crusts, which emerged up to 2 m above the water surface, while accreting cyanobacterial microbialites were present down to a depth of *15 m. Morphological and molecular analysis found that the living cyanobacterial mats were composed of diverse filamentous and coccoid cyanobacteria

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“…Hydrous magnesium carbonate phases, such as artinite, hydromagnesite and dypingite (Mg 5 (CO 3 ) 4 (OH) 2 ·5H 2 O), are far more likely to form (Hsu, 1967;Botha and Strydom, 2001;Hopkinson et al, 2008;Hänchen et al, 2008). No thermodynamic data are available for predicting the saturation state of dypingite but precipitation of both dypingite and hydromagnesite can be mediated by microorganisms (Ming and Franklin, 1985;Braithwaite and Zedef, 1996;Power et al, 2007;Cheng and Li, 2009;Power et al, 2009). The hydrous magnesium carbonate minerals are relatively stable and form more readily than magnesite at temperatures of <80ºC and they have therefore been suggested as alternative reaction products for carbonate storage (Ballirano et al, 2013).…”

Section: Mineral Saturation Estimated Using Phreeqcmentioning

confidence: 99%

Element scavenging by recently formed travertine deposits in the alkaline springs from the Oman Semail Ophiolite

2014

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Ultramafic rocks, such as the Semail Ophiolite in the Sultanate of Oman, are considered to be a potential storage site for CO 2 . This type of rock is rich in divalent cations that can react with dissolved CO 2 and form carbonate minerals, which remain stable over geological periods of time. Dissolution of the ophiolite mobilizes heavy metals, which can threaten the safety of surface and groundwater supplies but secondary phases, such as iron oxides, clays and carbonate minerals, can take up significant quantities of trace elements both in their structure and adsorbed on their surfaces.Hyperalkaline spring waters issuing from the Semail Ophiolites can have pH as high as 12. This water absorbs CO 2 from air, forming carbonate mineral precipitates either as thin crusts on the surface of placid water pools or bottom precipitates in turbulent waters. We investigated the composition of the spring water and the precipitates to determine the extent of trace element uptake. We collected water and travertine samples from two alkaline springs of the Semail Ophiolite. Twenty seven elements were detected in the spring waters. The bulk of the precipitate was CaCO 3 in aragonite, as needles, and rhombohedral calcite crystals. Traces of dypingite (Mg 5 (CO 3 ) 4 (OH) 2 ·5H 2 O) and antigorite ((Mg,Fe) 3 Si 2 O 5 (OH) 4 ) were also detected. The bulk precipitate contained rare earth elements and toxic metals, such as As, Ba, Cd, Sr and Pb, which indicated scavenging by the carbonate minerals. Boron and mercury were detected in the spring water but not in the carbonate phases. The results provide confidence that many of the toxic metals released by ophiolite dissolution in an engineered CO 2 injection project would be taken up by secondary phases, minimizing risk to water quality.

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The hydromagnesite playas of Atlin, British Columbia, Canada: A biogeochemical model for CO2 sequestration

Cited by 125 publications

References 53 publications

Magnesium isotope fractionation during hydrous magnesium carbonate precipitation with and without cyanobacteria

Magnesium isotope fractionation during hydrous magnesium carbonate precipitation with and without cyanobacteria

Hydrochemistry and microbialites of the alkaline crater lake Alchichica, Mexico

Element scavenging by recently formed travertine deposits in the alkaline springs from the Oman Semail Ophiolite

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