Cited by 36CO2 Sequestration and Geologic InteractionsCalcium Carbonate Crystallization and InhibitionKarst Systems and Hydrogeology

Coupled fluctuations in element release during dolomite dissolution

Open access
Putnis, Christine V., Ruiz-Agudo, Encarnación, Hövelmann, Jörn·2014·Mineralogical Magazine

Abstract

Atomic force microscopy has been used to determine more precisely the mechanism of the initial stages of dolomite dissolution. Analysis of outflow solutions initially shows fluctuations of both Ca and Mg release with concentrations of Ca >> Mg. The dolomite surface dissolves congruently in the presence of slightly acidified water as confirmed by the regular spreading of characteristic rhombohedral etch pits. Direct in situ observations show that a new phase precipitates on the dissolving surface simultaneously. As the Ca and Mg release decreases with time, the precipitated phase can be seen to spread across the dolomite surface. These observations indicate that the apparent incongruent dissolution of dolomite is a two-step process involving stoichiometric dissolution with the release of Ca, Mg and CO 3 ions to solution at the mineral–fluid interface coupled with precipitation of a new Mg-carbonate phase. The coupled element release confirms the interface-coupled dissolutionprecipitation mechanism.

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Registry

Crossref · 10.1180/minmag.2014.078.6.01

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19 of 19 references verified0 citation errors · 0 not checkable

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  • An interfacial dissolution-precipitation process existed.

    “More calcium was dissolved than manganese, indicating that the (Ca1-xMnx)CO3 solid solutions dissolved nonstoichiometrically [20] and suggesting the existence of an interfacial dissolution–precipitation process; thus, manganese more favorably nucleated on the crystal surfaces to form new precipitates [20, 33].”

    From Dissolution and solubility of calcite-rhodochrosite solid solutions [(Ca1-xMnx)CO3] at 25 °C (2021) · cites this paper as [33]

    The Abstract and the passage labeled Urosevic report interface-coupled dissolution and precipitation during dolomite dissolution. They do not establish that this process occurred in the citing paper’s (Ca1-xMnx)CO3 solid solutions; the reported surface precipitate is Mg-carbonate, not manganese-bearing. (LLM, conf=0.84)

    Experimental — accuracy not yet measured
  • Manganese more favorably nucleated on crystal surfaces to form new precipitates.

    “More calcium was dissolved than manganese, indicating that the (Ca1-xMnx)CO3 solid solutions dissolved nonstoichiometrically [20] and suggesting the existence of an interfacial dissolution–precipitation process; thus, manganese more favorably nucleated on the crystal surfaces to form new precipitates [20, 33].”

    From Dissolution and solubility of calcite-rhodochrosite solid solutions [(Ca1-xMnx)CO3] at 25 °C (2021) · cites this paper as [33]

    The Results and Discussion describe new precipitates forming on a dissolving dolomite surface and identify the likely phase as a magnesium carbonate. They do not address manganese or establish that manganese preferentially nucleates on crystal surfaces; the cited mechanism is supported only for the different Ca–Mg system studied here. (LLM, conf=0.85)

    Experimental — accuracy not yet measured

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Research works printed but not linked: 1

  1. Putnis, 2009, Reviews in Mineralogy and Geochemistry, 70, Mineralogical Society of America, and the Geochemical Society, 87–124

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Authors
Putnis, C. V., Ruiz-Agudo, E., & Hövelmann, J.
Affiliations
University of Münster (DE)
Corresponding author
Putnis, Christine V.
Venue
Mineralogical Magazine
Published
2014-11
Volume
78
Issue
6
Pages
1355-1362
ISSN
  • 0026-461X (ISSN-L)
  • 1471-8022
OpenAlex
W2096161879
Cited by
36
References
19
Citations by year
2026: 1 · 2025: 5 · 2024: 2 · 2023: 2 · 2022: 6 · 2021: 9 · 2020: 1 · 2019: 1 · 2018: 3 · 2017: 4 · 2016: 1 · 2015: 1
FWCI
1.53
Type
journal article
Language
en
Open access
Locations
  • Mineralogical Magazine (publishedVersion, cc-by)
  • eSpace (Curtin University) (submittedVersion)
  • Publication Database GFZ (GFZ German Research Centre for Geosciences) (submittedVersion)
Funders
  • European Commission (MAT2012-37584, RNM-179)
  • European Regional Development Fund (P11-RNM-7550, RNM-179)
Topics
  • Physical Sciences › Environmental Science › Environmental Engineering › CO2 Sequestration and Geologic Interactions
  • Physical Sciences › Materials Science › Biomaterials › Calcium Carbonate Crystallization and Inhibition
  • Physical Sciences › Earth and Planetary Sciences › Earth-Surface Processes › Karst Systems and Hydrogeology
Keywords
dolomite dissolution, calcium and magnesium release, congruent dissolution, incongruent dissolution, mineral-fluid interface, etch pits, dissolution-precipitation mechanism

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