Influence of chemical zoning on sandstone calcite cement dissolution: The case of manganese and iron

Pedrosa, Elisabete Trindade; Morales, Luiz F. G.; Rohlfs, Ricarda D.; Lüttge, Andreas

doi:10.1016/j.chemgeo.2020.119952

Cited by 8 publications

(6 citation statements)

References 64 publications

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“…Understanding the paragenetic sequence of carbon mineralization assemblages, including silica and aluminosilicate precipitation, will aid in the development and parametrization of predictive models, critical during permitting and monitoring stages of a carbon storage operation. Additionally, clarifying carbonate nodule compositional variability is crucial for predicting carbonate stability, as trace components and zonation may lead to distinct preferential nucleation and dissolution behavior. , Lastly, although the complex carbonate nodules may have exotic compositions, textures, and chemical zonation trends, their widespread presence in the Wallula samples and basalt carbonation experiments highlights their broad importance for continued CDR via CO 2 sequestration in reactive reservoirs.…”

Section: Environmental Implicationsmentioning

confidence: 99%

“…Additionally, clarifying carbonate nodule compositional variability is crucial for predicting carbonate stability, as trace components and zonation may lead to distinct preferential nucleation and dissolution behavior. 92,93 Lastly, although the complex carbonate nodules may have exotic compositions, textures, and chemical zonation trends, their widespread presence in the Wallula samples and basalt carbonation experiments highlights their broad importance for continued CDR via CO 2 sequestration in reactive reservoirs.…”

Section: ■ Environmental Implicationsmentioning

confidence: 99%

See 1 more Smart Citation

Exotic Carbonate Mineralization Recovered from a Deep Basalt Carbon Storage Demonstration

Polites

Schaef

Horner

et al. 2022

Environ. Sci. Technol.

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Mitigating climate change requires transformational advances for carbon dioxide removal, including geologic carbon sequestration in reactive subsurface environments. The Wallula Basalt Carbon Storage Pilot Project demonstrated that CO 2 injected into >800 m deep Columbia River Basalt Group flow top reservoirs mineralizes on month-year timescales. Herein, we present new optical petrography, micro-computed X-ray tomography, and electron microscopy results obtained from sidewall cores collected two years after CO 2 injection. As no other anthropogenic carbonates from geologic carbon storage field studies have been recovered, this world-unique sample suite provides unparalleled insight for subsurface carbon mineralization products and paragenesis. Chemically zoned nodules with Ca/ Mn-rich cores and Fe-dominant outer rims are prominent examples of the neoformed carbonate assemblages with ankerite−siderite compositions and exotic divalent cation correlations. Paragenetic insights for the timing of aragonite, silica, and fibrous zeolites are clarified based on mineral texture and spatial relationships, along with time-resolved downhole fluid sampling. Collectively, these results clarify the mineralogy, chemistry, and paragenesis of carbon mineralization, providing insight into the ultimate fate and transport of CO 2 in reactive mafic−ultramafic reservoirs.

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Section: Environmental Implicationsmentioning

confidence: 99%

Section: ■ Environmental Implicationsmentioning

confidence: 99%

Exotic Carbonate Mineralization Recovered from a Deep Basalt Carbon Storage Demonstration

Polites

Schaef

Horner

et al. 2022

Environ. Sci. Technol.

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“…In the TG/DTG results, the decrease in calcite peak was—relatively—clearly seen, but the decrease in C-S-H peak was difficult to observe because the C-S-H peak below 200 °C overlapped with the peaks of ettringite and gypsum, making it challenging to analyze. However, when referring to the other study results [ 49 , 50 , 51 ], C-S-H likely dissolved to some extent similar to calcite. Thus, the dissolved Ca 2+ ions can produce gypsum from the reaction with H 2 SO 4 in C-CON.…”

Section: Resultsmentioning

confidence: 61%

“…However, this reaction was also likely responsible for the gypsum formation in C-CON despite no Ca(OH) 2 before immersion ( Figure 10 b and Figure 11 b). Previous studies [ 27 , 41 , 48 , 49 , 50 , 51 ] reported that C-S-H and calcite can dissolve, producing Ca 2+ ions (or Ca(OH) 2 ) when the pH is lowered. In the TG/DTG results, the decrease in calcite peak was—relatively—clearly seen, but the decrease in C-S-H peak was difficult to observe because the C-S-H peak below 200 °C overlapped with the peaks of ettringite and gypsum, making it challenging to analyze.…”

Section: Resultsmentioning

confidence: 99%

Mechanical and Durability Properties of Cementless Concretes Made Using Three Types of CaO-Activated GGBFS Binders

Yum

Jeon

et al. 2021

Materials

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This study examined the mechanical and durability properties of CaO-activated ground-granulated blast-furnace slag (GGBFS) concretes made with three different additives (CaCl2, Ca(HCOO)2, and Ca(NO3)2) and compared their properties to the concrete made with 100% Ordinary Portland Cement (OPC). All concrete mixtures satisfied targeted air content and slump ranges but exhibited significantly different mechanical and durability properties. The CaO-activated GGBFS concretes showed different strength levels, depending on the type of additive. The added CaCl2 was the most effective, but Ca(NO3)2 was the least effective at increasing mechanical strength in the CaO-activated GGBFS system. The OPC concrete showed the most excellent freezing–thawing resistance in the durability test, but only the CaO-activated GGBFS concrete with CaCl2 exhibited relatively similar resistance. In addition, the chemical resistance was significantly dependent on the type of acid solution and the type of binder. The OPC concrete had the best resistance in the HCl solution, while all CaO-activated GGBFS concretes had relatively low resistances. However, in the H2SO4 solution, all CaO-activated GGBFS concretes had better resistance than the OPC concrete. All concrete with sulfate ions had ettringite before immersion. However, when they were immersed in HCl solution, ettringite tended to decrease, and gypsum was generated. Meanwhile, the CaO-activated GGBFS concrete with CaCl2 did not change the type of reaction product, possibly due to the absence of ettringite and Ca(OH)2. When immersed in an H2SO4 solution, ettringite decreased, and gypsum increased in all concrete. In addition, the CaO-activated concrete with CaCl2 had a considerable amount of gypsum; it seemed that the dissolved C-S-H and calcite, due to the low pH, likely produced Ca2+ ions, and gypsum formed from the reaction between Ca2+ and H2SO4.

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“…Direct measurements of the surface retreat perpendicularly, i.e., normal to the mineral surface, provide dissolution rates at micrometer to nanometer scales on face-oriented single crystals or polycrystalline aggregates. Such measurements rely on imaging techniques such as atomic force microscopy (Hillner et al, 1992;Stipp et al, 1994;Jordan and Rammensee, 1998;Shiraki et al, 2000;Emmanuel, 2014), vertical scanning interferometry (Fischer and Luttge, 2007;Smith et al, 2013;Pedrosa et al, 2021), confocal profilometry (Godinho et al, 2012), X-ray reflectivity (Fenter et al, 2000), digital holographic microscopy (Brand et al, 2017), or X-ray microscopy (Laanait et al, 2015). Determination of dissolution rates from surface retreat has the advantage of providing accurate measurements of mineral reactivity, as there is no need of normalization to the specific surface area, a parameter difficult to assess practically (Noiriel and Daval, 2017).…”

Section: Introductionmentioning

confidence: 99%

Dissolution rate variability at carbonate surfaces: 4D X-ray micro-tomography and stochastic modeling investigations

2023

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We provide a detailed 3D characterization of the geometry evolution and dissolution rate mapping at the surface of four carbonate samples, namely a calcite spar crystal, two limestone rock fragments, and an aragonite ooid, using time-lapse X-ray micro-tomography during dissolution experiments at pH 4.0. Evaluation of the retreat and mapping of the reaction rates at the whole surface of the samples reveals a large spatial variability in the dissolution rates, reflecting the composition and the specific contributions of the different regions of the samples. While crystal edges and convex topographies record the highest dissolution rates, the retreat is slower for flat surfaces and in topographic lows (i.e., concave areas), suggesting surface-energy related and/or diffusion-limited reactions. Microcrystalline aragonite has the highest rate of dissolution compared to calcite. Surprisingly, rough microcrystalline calcite surface dissolves globally more slowly than the {101̄4} faces of the calcite spar crystal. The presence of mineral impurities in rocks, through the development of a rough interface that may affect the transport of species across the surface, may explain the slight decrease in reactivity with time. Finally, a macroscopic stochastic model using the set of detachment probabilities at corner, edge, and face (terrace) sites obtained from kinetic Monte Carlo simulations is applied at the spar crystal scale to account for the effect of site coordination onto reactivity. Application of the model to the three other carbonate samples is discussed regarding their geometry and composition. The results suggest that the global dissolution process of carbonate rocks does not reflect only the individual behavior of their forming minerals, but also the geometry of the crystals and the shape of the fluid-mineral interface.

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Influence of chemical zoning on sandstone calcite cement dissolution: The case of manganese and iron

Cited by 8 publications

References 64 publications

Exotic Carbonate Mineralization Recovered from a Deep Basalt Carbon Storage Demonstration

Exotic Carbonate Mineralization Recovered from a Deep Basalt Carbon Storage Demonstration

Mechanical and Durability Properties of Cementless Concretes Made Using Three Types of CaO-Activated GGBFS Binders

Dissolution rate variability at carbonate surfaces: 4D X-ray micro-tomography and stochastic modeling investigations

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