Estimation of dolomite formation: Dolomite precipitation …

On the other hand, reactive-transport models depicting dolomitization (temperature range of 40 to 200°C) predicts the formation of two adjacent moving coupled reaction zones (calcite dissolution and dolomite precipitation) with sharp dolomitization front, and generation of >20% of secondary porosity.

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Secondary ferroan dolomite rhombs in oil reservoirs, …

The dolomite is calcium-rich and contains up to 10% iron but not measurable sodium or strontium. Total dissolved solids of produced interstitial water from the Chadra sand range from about …

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Grains of Detrital, Secondary, and Primary Dolomite from …

(2) Secondary—formed after deposition of the enclosing sediment. These are small euhedral rhombs that replaced calcite cement in lenticular marine sandstones. (3) Primary—formed within the depositional basin prior to final settling-down and burial of the sediment.

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Dolomite: Complete Guide (Updated 2022) | Healing …

Dolomite Gemstones in Oklahoma Dolomite in Italy Dolomite in Missouri Dolomite Properties Dolomite Healing Properties Dolomite Optical Properties Dolomite vs Other Stones Dolomite vs Limestone How is Dolomite Different from Limestone? Dolomite vs Granite Dolomite vs Calcite Difference Between Dolomite and Calcite Dolomite vs Marble

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Structure, genesis and resources efficiency of dolomite: …

Secondary dolomitization. Secondary dolomite is formed either by Mg 2+ replacement of Ca 2+ in carbonate minerals (Eq. ) (Machel, 2004; McKenzie and Vasconcelos, 2009) or by …

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SEM photo of secondary dolomite in carbonate-siliceous …

Secondary dolomitization of the Domanik black shales as an indicator of gas-water hydrocarbon-containing fluids upward migration in the Tatarstan territory Article Full-text available Jun 2020...

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Secondary Ion Mass Spectrometry Bias on Isotope Ratios …

Secondary Ion Mass Spectrometry Bias on Isotope Ratios in Dolomite–Ankerite, Part I: δ18O Matrix Effects - Śliwiński - 2016 - Geostandards and Geoanalytical Research - Wiley Online Library Original Article Secondary Ion Mass Spectrometry Bias on Isotope Ratios in Dolomite–Ankerite, Part I: δ 18 O Matrix Effects

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Dolomites and dolomitization | SpringerLink

Ideal, ordered dolomite has a formula of CaMg (CO 3) 2 and consists of alternating layers of Ca 2+ -CO 3 2− -Mg 2+ -CO 3 2− -Ca 2+ etc. perpendicular to the crystallographic c-axis. Most natural dolomite has up to a few percent Ca-surplus (and corresponding Mg-deficit), as well as less than ideal ordering.

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:Limestone;Agstone;agricultural limestone;aragonite;atomite;bell mine pulverized limestone;calcite;calcium carbonate;carbonic acid, calcium …

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(PDF) Primary and secondary textures of dolomite in …

dolomite (~20 vol. %) is the second most common carbonate mineral found in the carbonatites, with five morphological types (madugalla et al., 2017): (i) coarse-grained dolomite (type-1), (ii)...

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Secondary Ion Mass Spectrometry Bias on Isotope Ratios …

Secondary Ion Mass Spectrometry Bias on Isotope Ratios in Dolomite–Ankerite, Part I: δ 18 O Matrix Effects Maciej G. Śliwiński, Kouki Kitajima, Reinhard Kozdon, Michael J. Spicuzza, John H. Fournelle, Adam Denny, John W. Valley First published: 02 July 2015 https://doi/10.1111/j.1751-908X.2015.00364.x Citations: 46 Read the full text PDF Tools

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The isotopic composition of secondary dolomites

The oxygen isotopic composition of these dolomites could thus be controlled by a carbonatewater isotopic equilibrium. Extrapolation from high temperature experiments and …

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Grains of Detrital, Secondary, and Primary Dolomite from …

Three genetic types of dolomite grains occur in Cretaceous sandstones of the Western Interior and Alaska. They are: (1) Detrital—clastic fragments eroded from dolomite rocks in the …

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Secondary Ferroan Dolomite Rhombs in Oil Reservoirs, …

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Origin of secondary dissolution porosity in …

Selective dissolution of small dolomite crystals (because solubility increases as crystal size decreases), or of more soluble dolomite phases in the rocks, can result in the development of vugs...

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:1) μ μ μ,,; 2),。, + TGAXRDCarb B/Carb A( )/, …

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Key words dolomitisation secondary dolomite protogenic sedimentary rocks 。,、。,。,,, …

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Pale buff coloured, crystalline rock. Numerous cavities, thought to have been formed by shrinkage during alteration of primary calcite (CaCO 3) to secondary dolomite (CaMg [CO 3] 2 ). There is a weak reaction to dilute acid, which suggests that there may be some calcite remaining. Colourless crystalline material infilling holes. Thin-section

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Dolomite | SpringerLink

Dolomite is a carbonate rock composed mainly of CaMg (CO 3) 2 and forms in the unique depositional environments or though the dolomitization process. It is usually greyish white and has a low hardness. It appears similar to limestone but does not fizz or only fizzes slightly in diluted hydrochloric acid.

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Dolomite‐rock textures and secondary porosity …

Dolomitization is closely associated with the development of secondary porosity; dolomitization pre-and post-dates dissolution and corrosion and no secondary porosity generation is present in the associated limestones. The most common porosity types are non-fabric selective moldic and vuggy porosity and intercrystalline porosity.

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Greenhouse conditions induce mineralogical changes and …

This equates to a relative increase in asymmetry of 88% ( Fig. 2a) (Methods) and includes three identifiable higher Mg-carbonate phases: High Mg-calcite (H-HMC~26–32 mol% MgCO 3 ), dolomite...

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Primary and secondary carbonate in Chinese loess

Secondary dolomite only can be found in the red clay formation underlying the typical loess and paleosol layers (He et al., 2012). A small faction of the secondary carbonate in …

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Typical secondary dissolution pore types in …

... limestones, common secondary pore types formed as a result of post-depositional dissolution variously include exhumed interparticle, intraparticle, fenestral, shelter, and growth-framework...

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Secondary Dolomitization as a Factor Responsible for the …

The secondary dolomite crystals are subhedral and euhedral with varying sizes from 0.01–0.10 to 0.5 mm. Uneven distribution of dolomite crystals of various morphologies and sizes is related to different structures of dolomitized rocks responsible for different permeability for the dolomitizing fluid ( Figs. 4f, 4g ).

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Structure, genesis and resources efficiency of dolomite: …

As for secondary dolomite, formed by Mg 2+ replacement of Ca 2+ in carbonate minerals, several models have been proposed and widely adopted, including: near-surface dolomitization, burial dolomitization, and hydrothermal dolomitization.

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Study of Iron-Bearing Dolomite Dissolution at Various …

Nanocrystalline secondary phases precipitated in the course of dolomite dissolution at pH 3 and 80 °C were identified as (nano)hematite, ferrihydrite, and an ankerite like mineral using X-ray diffraction, transmission electron microscopy, MicroRaman and X …

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[PDF] Primary and secondary textures of dolomite in …

Textural studies of carbonate minerals over the past three decades revealed that their textures are useful tool for understanding of petrogenesis of carbonatites. Petrographic, cathodoluminescence (CL) and electron-microprobe studies on textures of calcite and dolomite were performed for interpretation of evolution of Eppawala carbonatites in Sri Lanka. The …

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Dolomite: occurrence, evolution and economically …

related to dolomite's unique mineralogy and chem-istry. The most important control on distribution is possibly kinetics; there has not been enough time in the Holocene to form extensive areas of secondary dolomite Land 1985, 1998; Chai et al., 1995 . . Then there is the problem of parity, do variations

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Dolomite and dolomitization model- a short …

The widely accepted hypothesis of dolomitization is that limestone is transformed into dolomite by the dissolution of calcite followed by dolomite precipitation. 4 That dolomite grows at the expense of calcite was …

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(PDF) Dolomite: Occurrence, Evolution and Economically …

Dolomite can form in lakes, on or beneath the shallow seafloor, in zones of brine reflux, and in early to late burial settings. It may form from seawater, from continental waters, from the mixing...

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