secondary dolomite

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(PDF) Study of Iron-Bearing Dolomite Dissolution at ...

We investigated the dissolution of a natural Fe-containing dolomite [Ca1.003Mg0.972Fe0.024Mn0.002(CO3)2] under acidic conditions (pH 3-5.5) with atomic force microscopy (AFM) at 2

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Study of Iron-Bearing Dolomite Dissolution at Various ...

line 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-ray

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Types of secondary porosity of carbonate rocks in ...

Fracture porosity was identified as the most common type of effective secondary porosity and was observed predominantly in dolomite and dolomitic limestone. Cavity porosity was the least common type of effective secondary porosity at the study sites.

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Chapter 12 -Sonic logs

– Sonic ignores secondary porosity; i.e, vugs and fractures – Result: Measured transit time < than would be calculated for given porosity ... Secondary Porosity I 2 I t I s Example of Porosity – Velocity Correlation in Dolomite The example illustrates travel times which are consistently greater than predicted by the "time-average ...

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Geology and Mineral Deposits of the Powell River Area ...

Geology and Mineral Deposits of the Powell River Area Claiborne and Union Counties Tennessee i By ARNOLD L. BROKAW, JOHN RODGERS, DEANE F. KENT, ROBERT A. LAURENCE, and CHARLES H. BEHRE, JR. M ... stone is commonly altered to secondary dolomite. At the New Pros­

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Crain's Petrophysical Handbook - Porosity Basics

Secondary porosity is created by processes other than primary cementation and compaction of the sediments. An example of secondary porosity can be found in the solution of limestone or dolomite by ground waters, a process which creates vugs or caverns.

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A route for the direct crystallization of dolomite

A route for the direct crystallization of dolomite ... such formation reactions lead to primary or early secondary diagenetic dolomites. This has lead to the paradox termed the "Dolomite Problem," which is a long-standing debate with im-portant …

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Secondary Ion Mass Spectrometry Bias on Isotope Ratios in ...

Secondary Ion Mass Spectrometry Bias on Isotope Ratios in Dolomite–Ankerite, Part I:d18OMatrixEffects Maciej G.Sliwi nski (1, 2) ... Keywords: secondary ion mass spectrometry, oxygen isotopes, dolomite, ankerite, matrix effects. Nous documentons le developpement d'une serie de

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Rock Types - Dolomite

Field relations: Dolomites are usually interbedded with other limestone s and are commonly associated salt and gypsium deposits. Most dolomites are thought to be of secondary (replacement) origin; the calcite of the original limestone having been replaced in situ by dolomite…

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Diagenesis and Porosity - SEPM Strata

Diagenesis and Porosity. Carbonate Sequences. Evolution of Carbonate Seq. Arabian Intrashelf Basins. ... the dolomite has the potential for creating reservoir quality porosity and permeability in originally tight limestones ... The formation of secondary porosity by dissolution is the most important process in reservoir development. During ...

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Dolomite‐rock textures and secondary porosity ... - DeepDyve

Non‐planar dolomite cement (saddle dolomite) is the latest generation and is responsible for occlusion of fractures and pore space. 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 ...

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University of Minnesota's Mineral Pages: Dolomite

Secondary sedimentary dolomites can be broadly separated into two informal groups. Many sedimentary dolomites occur from alteration of calcite and aragonite relatively soon after their own formation, resulting in regionally extensive masses of bedded dolostone.

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Original paper Primary and secondary textures of dolomite ...

JJJournal foaGr Journal of Geosciences, 62 (2017), 187–200 DOI: 10.3190/jgeosci.242 Original paper Primary and secondary textures of dolomite in Eppawala carbonatites,

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Porosity Logs - Forsiden

Porosity Logs. General • Type of porosity logs – Sonic log – Density log ... Dolomite 43.5 143 143 Anhydrite 50 164 164 Salt 66.7 219 220 Casing (iron) 57 187 187. Sonic Secondary Effects • Environmental effects: – Enlarged borehole, formation fractures, gas in the borehole or formation, or improper centralization can produce signal ...

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Dolomite and dolomitization model - a short review

On the basis of the mode of formation, dolomites can broadly be divided into two groups: primary dolomite and secondary dolomite. 2 Primary dolomite precipitate directly from aqueous solution, mostly at or near room temperature (20-35 o C), ...

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secondary dolomite

secondary dolomite Flözdolomit m, Zechsteindolomit secondary dolomite Flözdolomit m, Zechsteindolomit Skip to main content Skip to . Get More Info; Dolomite - Wikipedia. Dolomite (/ ˈ d ɒ l ə m aɪ t /) is an anhydrous carbonate mineral composed of calcium magnesium carbonate, ideally CaMg(CO 3) 2 The term is also used for a .

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Reservoir Rock & Source Rock Types: Classification ...

Reservoir Rock & Source Rock Types: Classification, Properties & Symbols Reservoir rock: A permeable subsurface rock that contains petroleum. Must be both porous and permeable. ... • Porosity is largely a result of dissolution and fracturing (secondary porosity) ... • Dolomite – layers of uniform rhomboids, each layer offset from that ...

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Comparison Of Limestone And Dolomite Porosity - USGS

Because the porosities of both curves are greater than 20% above their intersection point, the porosity difference between limestone and dolomite at relatively shallow depths may be of secondary importance compared to other reservoir properties.

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Dolomite Secondary Product Alteration Limestone

One of the main effects of supergene alteration of ore-bearing hydrothermal dolomite in areas surrounding secondary zinc orebodies (Calamine-type nonsulfides) in southwestern Sardinia (Italy) is the formation of a broad halo of Zn dolomite.

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Dolomite : Dolomite - Tomra

20-60mm // Product // PRO Secondary COLOR NIR Dolomite 20-50mm // Input unwashed // PRO Secondary COLOR NIR For more information on dolomite, please contact us. Case Studies & Testimonials TOMRA Sorting has worked with customers in many countries, see what they thought! Read some of our case studies to get to know how TOMRA´s sensor-based ...

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Dolomite - Saudi Lime

Dolomite is sedimentary or metamorphic secondary origin rock [Ca, Mg(CO3)2], the theoretical composition of pure dolomite is 45.8% MgCO3(21.85 MgO) and 54.3%CaC03(30.4 CaO). Usually the rock is associated with different impurities like clay, silica, iron and aluminum oxides.

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Crystal Chemical and Geochemical Features of Genetically ...

mites and secondary dolomites formed after the pri-mary limestones. Dolomites of the first group are formed directly in waters of the sedimentation basin, whereas dolomites of the second group are formed in the course of metasomatic transformation of the pri-

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Dolomite: occurrence, evolution and economically important ...

Dolomite is not a simple mineral; it can form as a primary precipitate, a diagenetic replacement, or as a hydrothermal/metamorphic phase, all that it requires is ...

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secondary dolomite | SpringerLink

secondary dolomite Flözdolomit m, Zechsteindolomit. Cite this entry as: (2014) secondary dolomite.In: Dictionary Geotechnical Engineering/Wörterbuch GeoTechnik.

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Geolex — SunRiver publications

Lower contact has been placed between the top of a secondary dolomite and base of a limestone. Stratigraphic depth of secondary dolomitization varies in the range. May be a useful term for the pervasively dolomitized rocks forming the upper part of the Mississippian Madison Group.

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Soils Chapter 2 Flashcards | Quizlet

Start studying Soils Chapter 2. Learn vocabulary, terms, and more with flashcards, games, and other study tools.

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secondary dolomite

Calcium carbonate speleothems (secondary deposits) in the forms of stalactites, stalagmites, flowstone etc, can also form in caves within dolomite rock. "Dolomite is a …

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Study of Iron-Bearing Dolomite Dissolution at Various ...

XPS elemental mapping of a dolomite surface area rich in secondary phases after 1 day in HCl (Batch-pH3-24.3), distinguishing the dolomite substratum, a secondary metal oxide and a mixed area depleted in Mg; (a) total iron, (b) oxygen bonded to metals, (c) oxygen bounded to carbonates, (d) Ca/Mg ratio.

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is dolomite a secondary product of alteration of li ne

is dolomite a secondary product of alteration of li ne Bentonite, Kaolin and Selected Clay Minerals … WHO TASK GROUP ON ENVIRONMENTAL HEALTH CRITERIA FOR BENTONITE, KAOLIN, AND SELECTED CLAY MINERALS . ... secondary: transported by ...

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Mapping and Visualization of Dolomite "Chimneys" in the ...

Mapping and Visualization of Dolomite "Chimneys" in the Michigan Basin James R. Wood ([email protected]; 906-487-2894) ... The dolomite strikes along a structural monocline that dips N 30 E and forms the NE flank of the Deep River dome. The dolomite is clearly secondary and is finely crystalline and vuggy. In core the dolomite is massive with ...

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