is dolomite a sendary product of alteration of limestone

  • History of Geology: The Dolomite Mountains and the ...

    2010-8-31  After geologists could answer how the most spectacular rock walls and pea ks in the Dolomites formed, the next urgent questions was if dolomite was a primary product of marine deposition or a secondary product of alteration of common limestone.

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  • Dolomitization mineralogy Britannica

    Dolomitization, process by which limestone is altered into dolomite; when limestone comes into contact with magnesium-rich water, the mineral dolomite, calcium and magnesium carbonate, CaMg(CO 3) 2, replaces the calcite (calcium carbonate, CaCO 3) in the rock, volume for volume.Dolomitization involves recrystallization on a large scale. The dolomite mineral grains often show distinct faces ...

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  • dolomite used limestone - SmartTech

    dolomite used limestone. Dolomite Dolomite Uses: Dolomite is used as a source of magnesium metal and of magnesia (MgO), which is a constituent of refractory bricks Dolostone is often used instead of limestone as an aggregate for both cement and bitumen mixes and also as a flux in blast furnaces The use of dolostone as a flux has increased, especially since ...

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  • The Mysterious Microbial Origin of Mountains -

    2012-6-21  However this secondary modification of limestone alone could not explain the large amounts of dolomite rock found in the Dolomites and other regions of the world. Fig.1.

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  • Metamorphism of Dolomites and Limestones

    The first is modally dominated by dolomite (CaMg(CO3)2), the second by calcite (CaCO3) and there is a complete gradation between the pure dolomite and limestone “end members” indicated by the ...

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  • dolomite uses as a flux

    Dolomite /ˈdɒləmaɪt/ is an anhydrous carbonate mineral composed of calcium magnesium carbonate, ideally CaMg(CO3)2. The word dolomite is also used to describe the sedimentary carbonate rock, which is composed predominantly of the mineral dolomite (also known as dolostone). Limestone and dolomite flux and their use in iron and steel

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  • Dolomite and dolomitization model - a short review

    2018-7-13  Dolomite types 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 (20-35oC), with no CaCO 3 dissolution involved.3 However, dolomite can also form as a secondary phase

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  • Zoned alteration in limestone at porphyry copper

    Zoned alteration in limestone at porphyry copper deposits, Ely, Nevada ... secondary biotite and orthoclase plus disseminated chalcopyrite permeate porphyry. Massive andradite and fine-grained diopsidic pyroxene replace adjacent quartz-bearing limestone and dolomite. Later pyrite-chalcopyrite veinlets cut the early calc-silicates and are rimmed ...

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  • What is Limestone? - The Better Spreader

    2020-5-17  The principal component of limestone is the mineral calcite, but limestone frequently also contains the minerals dolomite (CaMg(CO3)2) and aragonite (CaCO3). Pure calcite, dolomite, and aragonite are clear or white. However, with impurities, they can take on a variety of colors.

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  • Hydrothermal Alteration - IU

    2019-12-13  Silification involves adding secondary silica to a complex. Diagram 3 shows a chart of the primary silicate mineral and its alteration product. Volcanic ash is altered into vermiculite and montmorillonite. Olivine is altered into limonite, serpentine, and talc.

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  • regional metamorphism of dolomite and limestone

    Metamorphism of Dolomites and Limestones SpringerLink. Apr 22, 2011 There are two main types of carbonate rocks, dolomites and limestones. The first is modally dominated by dolomite (CaMg (CO 3) 2), the second by calcite (CaCO 3) and there is a complete gradation between the pure dolomite and limestone “end members” indicated by the rock names, calcitic dolomite, dolomitic limestone ...

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  • dolomite uses as a flux

    Dolomite /ˈdɒləmaɪt/ is an anhydrous carbonate mineral composed of calcium magnesium carbonate, ideally CaMg(CO3)2. The word dolomite is also used to describe the sedimentary carbonate rock, which is composed predominantly of the mineral dolomite (also known as dolostone). Limestone and dolomite flux and their use in iron and steel

  • Get Price
  • sedimentary rocks of dolomite

    Dolomite, also known as dolostone and dolomite rock, is a sedimentary rock composed primarily of the mineral dolomite, CaMg(CO 3) 2. Dolomite is found in sedimentary basins worldwide. It is thought to form by the postdepositional alteration of lime mud and limestone by magnesium-rich groundwater. Get price

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  • Lab 2: Rocks Page 1 of 9 L 2: R IDENTIFICATION DUE ...

    2020-12-31  metamorphic product of fossilized plants and consisting of amorphous carbon with ... A metamorphic rock formed by alteration of limestone or dolomite, often irregularly colored by impurities 4. Lab 2: Rocks Page 5 of 9 ... secondary alteration (during diagenesis) of limestone! Therefore, it usually looks very similar to limestone.

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  • METASOMATIC PROCESSES ALONG THE CONTACT OF

    are located at the metasomatic boundary of the ore^beaning dolomite. Another type of secondary limestone is that which shows cavernous „grill-work” structure. This type resulted from transformation, of lami­ nated limestones. The secondary carbonates 'discussed bear a record of dolomiitization,

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  • History of Geology: The Dolomite Mountains and the ...

    2010-8-31  Diedonnè-Silvain-Guy-Tancrede de Gvalet de Dolomieu, born June 23, 1750 in the village of Dolomieu, was a typical naturalist of his time. With 26 years he travelled trou gh half Europe, he got interested in the mines of the Bretagne and the basaltic plateau in Portugal, and he visited South Italy to study the aftermath of an earthquake in Sicily and observed a n eruption of the Aetna.

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  • Hydrothermal Alteration - IU

    2019-12-13  Silification involves adding secondary silica to a complex. Diagram 3 shows a chart of the primary silicate mineral and its alteration product. Volcanic ash is altered into vermiculite and montmorillonite. Olivine is altered into limonite, serpentine, and talc.

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  • The Kalahari Platinum project - SAIMM

    2009-8-26  alteration product after the plagioclase. Carbonate alteration appears to have been focused along low-angle thrusting. Mineralogically, the carbonate alteration was almost complete, drastically altering the composition of the precursor lithologies, and forming typical ‘breccia-like’ textures or complete ‘limestone/ dolomite’-like features.

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  • Alteration Products of Uraninite from the Colorado Plateau

    2017-9-18  alteration product of UO2 in Si-rich groundwater • (SeO3) ↔ (CO3) in rutherfordine ... dolomite and calcite. Gneiss host rock (# 603, Caribou Mine, Boulder, CO) A. Concentric structure (BSE). Galena ... Origin similar to secondary uraninite or U3O8 close to unaltered uraninite.

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  • Magnesium Geoscience Australia

    2021-5-5  The magnesite ore contains more than 40% magnesium oxide. Another deposit of magnesite also formed from the alteration of limestone is situated south of Arthur River at Main Creek. In South Australia, beds of magnesite ranging from 5 centimetres to 9 metres in thickness occur at Witchelina, 80km north west of Leigh Creek, Copley, and Myrtle ...

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  • Middle Permian dolomites of the SW Sichuan Basin

    2021-3-5  Second-phase mesocrystalline dolomite is interpreted as an alteration product during open circulation of seawater brines within the carbonate platform which was underlain by Emeishan LIP intrusion. Hydrothermal fluids during emplacement of Emeishan LIP at end of Middle Permian were important in later coarse crystalline dolomite types.

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  • sedimentary rocks of dolomite

    Dolomite, also known as dolostone and dolomite rock, is a sedimentary rock composed primarily of the mineral dolomite, CaMg(CO 3) 2. Dolomite is found in sedimentary basins worldwide. It is thought to form by the postdepositional alteration of lime mud and limestone by magnesium-rich groundwater. Get price

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  • Dolomites Encyclopedia

    2018-5-18  Dolomite Description Physical characteristics Dolomite is a common mineral. It is also known as CaMg(CO3)2 and is a type of compact limestone consisting of a calcium magnesium carbonate. In combination with calcite and aragonite, dolomite makes up approximately 2% of the earth's crust.

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  • Dolomite (rock) - Hyperleap

    An alternative name sometimes used for the dolomitic rock type is dolostone. The two major types are limestone, which is composed of calcite or aragonite (different crystal forms of CaCO 3 ) and dolomite rock, also known as dolostone, which is composed of mineral dolomite (CaMg(CO 3 ) 2 ). A closely related rock is dolomite, which contains a high percentage of the mineral dolomite, CaMg(CO 3 ) 2.

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  • Origin of dolomite in the Late Cretaceous–Paleocene ...

    2005-11-1  1.. IntroductionThe formation of dolomite and the nature of dolomitizing fluids have been some of the most intensively debated and extensively studied problems in carbonate sedimentology (Hardie, 1987, Morrow, 1998).Studies have been focused on sediments of lakes, coastal and shelf areas and a number of models have been put forward (for a general review of dolomitization models, see

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  • The limestone, dolomite, and coquina resources of

    2020-5-8  Dolomite most often forms by subsequent alteration (recrystallization) of a limestone after its deposition. In many cases the major features of the limestone, such as bedding or chert nodules, may carry over into the dolomite.

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  • Dolomitization of the Middle Bakken Tight-oil Reservoir ...

    2019-3-6  Ahlbrandt et al., 2005), about half of which contain abundant dolomite . 85 (e.g., Zenger et al., 1980; Warren, 2000).In North Ameri ca, approximately 80% of all carbonate-86. hosted oil and gas reservoirs have been dolomitized in some fashion (Zenger et al., 1980) , making . 87. them more porous and permeable (on average) than their limestone ...

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  • Hydrothermal Alteration - IU

    2019-12-13  Silification involves adding secondary silica to a complex. Diagram 3 shows a chart of the primary silicate mineral and its alteration product. Volcanic ash is altered into vermiculite and montmorillonite. Olivine is altered into limonite, serpentine, and talc.

  • Get Price
  • Study of Iron-Bearing Dolomite Dissolution at Various ...

    2021-3-12  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 20 °C and with batch dissolution experiments at 80 °C. Dolomite dissolution proceeded by two identified mechanisms: removal of dolomite layers through spreading and

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  • The Kalahari Platinum project - SAIMM

    2009-8-26  alteration product after the plagioclase. Carbonate alteration appears to have been focused along low-angle thrusting. Mineralogically, the carbonate alteration was almost complete, drastically altering the composition of the precursor lithologies, and forming typical ‘breccia-like’ textures or complete ‘limestone/ dolomite’-like features.

  • Get Price