Habit of bacterially induced precipitates of calcium carbonate and the influence of medium viscosity on mineralogy

Buczynski, Chris; Chafetz, Henry S.

doi:10.1306/d42676db-2b26-11d7-8648000102c1865d

Cited by 298 publications

(165 citation statements)

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“…The exact conditions that favor aragonite precipitation at one time and calcite at another are unclear. Previous studies [7,14,25] show that the main factors controlling the precipitation of calcite and aragonite can be: temperature [8,14,25,44,49], the Sr content [50,51], (Mg/Ca) ratio [25,52], pCO 2 [38], rate of CO 2 degassing [43] and precipitation rate [53,54]. In our case the temperature in Thermopylae hot springs (predominant phase calcite) ranges from 33 to 40 • C, while the temperature in Euboea hot springs (predominant phase aragonite) ranges from 43 to 82 • C ( The Sr content in Thermopylae hydrothermal fluid reaches 11900 µg/L and in travertines formed in Thermopylae, this reaches 2160 mg/kg [32], with the predominant phase as calcite.…”

Section: Discussionmentioning

confidence: 99%

Distribution, lithotypes and mineralogical study of newly formed thermogenic travertines in Northern Euboea and Eastern Central Greece

Kanellopoulos

2012

Open Geosciences

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Abstract:In the northwestern part of Euboea Island and the neighbouring part of the mainland in eastern central Greece, many hot springs exist. We collected and analysed the newly formed material around the hot springs. The samples were studied at the lab with X-Ray Diffraction, Scanning Electron Microscopy (SEM) and Energy Dispersive Spectroscopy (EDS). In all cases the studied materials were thermogenic travertine presenting many different lithotypes. The studied travertine deposits consist mainly of aragonite and calcite, but in some cases, as the main mineral phase, an amorphous hydrous ferric oxyhydroxide, probably ferrihydrite (creating a laminated iron-rich travertine deposit), was identified. The lithotypes that were identified were of great variety (spicular, shrubs, etc

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Section: Discussionmentioning

confidence: 99%

Distribution, lithotypes and mineralogical study of newly formed thermogenic travertines in Northern Euboea and Eastern Central Greece

Kanellopoulos

2012

Open Geosciences

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“…In the control experiments using non-inoculated medium, neither mineral precipitation nor changes in pH were detected. (Buczynski and Chafetz, 1991;Knorre and Krumbein, 2000;Warthmann et al, 2000).…”

Section: Aerobic Culture Experimentsmentioning

confidence: 99%

“…Lee and Golubic (1999)) interpreted spherulitic structures in Mesoproterozoic Gaoyuzhuang Formation, China (1.2-1.5 Ga), as being microbial in origin. Buczynski and Chafetz (1991) suggested that "sheaf-of-wheat" or dumbbell morphologies are unique to bacterially induced precipitates and can be used to identify such precipitates in the rock record. Apparently, carbonate spherulites are the final stage of dumbbell growth (Buczynski and Chafetz, 1991;Warthmann et al, 2000).…”

Section: Spherulites In the Geologic Record As An Evidence For Microbmentioning

confidence: 99%

Microbial Dolomite Precipitation under Aerobic Conditions: Results from Brejo do Espinho Lagoon (Brazil) and Culture Experiments

Sánchez‐Román

Vásconcelos

Warthmann

et al. 2009

Perspectives in Carbonate Geology

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Microbially mediated high Mg-calcite and dolomite precipitation occurs under oxic conditions in Brejo do Espinho lagoon, Brazil, within the upper 5 cm below the sediment/water interface. With burial to < 25 cm in the sediment sequence, early diagenesis associated with sulfate reducing bacterial activity transforms the mixed carbonate mineralogy to 100% dolomite, as the pore water becomes undersaturated with respect to calcite, while remaining supersaturated with respect to dolomite. Laboratory culture experiments using moderately halophilic aerobic bacteria (Virgibacillus marismortui and Marinobacter sp.) isolated from the uppermost part of the microbial mat in Brejo do Espinho succinctly demonstrate that microbially mediated dolomite precipitation can occur under ambient Earth's surface conditions in the presence of oxygen.These results add an additional metabolic process, aerobic respiration, to bacterial sulfate reduction and methanogenesis, which have previously been identified with dolomite formation. Furthermore, the formation of carbonate minerals with spherulitic structures in both the natural environment and laboratory culture experiments points to microbial involvement, as recognized in numerous other modern environments and ancient systems. This study suggests that previously recognized modern dolomiteforming environments, such as the supratidal areas of Andros Island, Bahamas with Recent dolomite crusts, should be revisited to evaluate the importance of aerobic respiration in dolomite precipitation.

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“…Both of these factors can serve to increase the rate of precipitation, and thereby increase the partitioning of Sr into calcite. Another possible factor that has been suggested is that the fine grained minerals typically formed during biomineralization (Buczynski and Chafetz, 1991) tolerate lattice substitutions more readily than larger grained minerals (Ferris et al, 1995). An objective of this research was to consider these possibilities with respect to ureolytically driven calcite precipitation.…”

Section: Background: Sr Partitioning In Calcitementioning

confidence: 99%

Strontium incorporation into calcite generated by bacterial ureolysis

Fujita

Redden

Ingram

et al. 2004

Geochimica et Cosmochimica Acta

214

141

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Abstract-Strontium incorporation into calcite generated by bacterial ureolysis was investigated as part of an assessment of a proposed remediation approach for 90 Sr contamination in groundwater. Urea hydrolysis produces ammonium and carbonate and elevates pH, resulting in the promotion of calcium carbonate precipitation. Urea hydrolysis by the bacterium Bacillus pasteurii in a medium designed to mimic the chemistry of the Snake River Plain Aquifer in Idaho resulted in a pH rise from 7.5 to 9.1. Measured average distribution coefficients (D EX ) for Sr in the calcite produced by ureolysis (0.5) were up to an order of magnitude higher than values reported in the literature for natural and synthetic calcites (0.02-0.4). They were also higher than values for calcite produced abiotically by ammonium carbonate addition (0.3). The precipitation of calcite in these experiments was verified by X-ray diffraction. Time-of-flight secondary ion mass spectrometry (ToF SIMS) depth profiling (up to 350 nm) suggested that the Sr was not merely sorbed on the surface, but was present at depth within the particles. X-ray absorption near edge spectra showed that Sr was present in the calcite samples as a solid solution. The extent of Sr incorporation appeared to be driven primarily by the overall rate of calcite precipitation, where faster precipitation was associated with greater Sr uptake into the solid. The presence of bacterial surfaces as potential nucleation sites in the ammonium carbonate precipitation treatment did not enhance overall precipitation or the Sr distribution coefficient. Because bacterial ureolysis can generate high rates of calcite precipitation, the application of this approach is promising for remediation of 90 Sr contamination in environments where calcite is stable over the long term.

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Habit of bacterially induced precipitates of calcium carbonate and the influence of medium viscosity on mineralogy

Cited by 298 publications

References 0 publications

Distribution, lithotypes and mineralogical study of newly formed thermogenic travertines in Northern Euboea and Eastern Central Greece

Distribution, lithotypes and mineralogical study of newly formed thermogenic travertines in Northern Euboea and Eastern Central Greece

Microbial Dolomite Precipitation under Aerobic Conditions: Results from Brejo do Espinho Lagoon (Brazil) and Culture Experiments

Strontium incorporation into calcite generated by bacterial ureolysis

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