The best fit for the Avrami model indicates an induction time of h, a rate constant of × 10 −5 s −1, and time exponent of for the control dolomitization reaction at 200 °C, and ...
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Dolomitization process and its implications for porosity development in dolostones: A case study from the Lower Triassic Feixianguan Formation, Jiannan area, Eastern Sichuan Basin, China.
Dolomitization can overwrite primary poresystem development, and control flow and storage capability of affected rocks (Lucia Major, 1994). Owing to the nearsurface nature of the marine diagenetic environment in which such dolomitization is understood to occur, exposure of these early dolomites to meteoric waters following a relative sea ...
Dolomite porosity ranges from 25% to 5%, suggesting a porefilling phase. The dolomite beds are concentrated at the top of the outcrops, with the lowest porosity values at the top and the highest porosity downdip near the change to limestone.
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Dolomitization is an ubiquitous phenomenon of metasomatism in the diagenetic realm (Machel, 2004;Warren, 2000), where a carbonate rocks (CaCO3) interacts with a magnesiumrich fluids to form...
Dolomitization. One of the "legacy" slide/audiotape programs from the mid1980s—now available on DVD! Lynton Land presents and describes the various models for dolomitization, and examples are offered. The mineralogy, geochemistry, and petrology of dolomite is introduced and summarized as pertaining to the timing and mechanisms of ...
Abstract Dolomite occurs throughout the subsurface of modern carbonate platforms such as the Bahamas. Groundwater flow systems must be responsible for delivery of reactants needed for dolomitization. Reflux, freshwater lens flows, and thermal convection are largescale flow systems that may be widespread in active platforms.
dolomitization, process by which limestone is altered into dolomite; when limestone comes into contact with magnesiumrich 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.
Dolomitization is the geological process in which Magnesium ions replace Calcium ions in a mineral called calcite to form carbonate mineral dolomite. It depends on specific conditions which include low Ca: Mg ratio in solution, reactant surface area, the mineralogy of the reactant, and high temperatures. Hence the dolomite mining companies are ...
Dolomitization is a geological process by which the carbonate mineral dolomite is formed when magnesium ions replace calcium ions in another carbonate mineral, calcite. It is common for this mineral alteration into dolomite to take place due to evaporation of water in the sabkha area. [1]
As an opposite process of dolomitization, the studies of formation condition of dedolomitization and calcitedolomitesolution system can help to analyze the origin of dolomitization. The nearsurface dedolomitization is generally relevant to the dissolution of gypsum and the meteoric water of vadose zone and phreatic zone.
مصنع كسارة متنقلة; الكسارة المتنقلة الزاحفة; الرمال ماكينة; أنواع الكسارات. كسارة الفك; تأثير محطم; كسارات مخروطية; فسي كسارة; حسب الركام القابل للمعالجة. كسارة الحجر; كسارة الركام; الحجر ...
سورة الحجر كغيرها من سور القرآن هي ذات فوائد متعددة، وتأثير إيجابي على حياة الأشخاص، فجميع سور القرآن ذات تأثيرات إيجابية للقارئ، وسورة الحجر لها عدد من الفضائل أهمها ما يلي: معرفة أن هناك العاصين المكذبين، الذين يعاندون أوامر الله تعالى ونواهيه. وأن هؤلاء موجودون في كل وقت وحين، وأن من سلك طريق الدعوة عليه ألا ييأس، أو يتكاسل عما كلف به.
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The diagenesis of ooids can be a valuable source of paleodepositional information. This study provides an example of ooids dolomitization in the Cambrian Zhangxia Formation, Xiaweidian, China. The ooids were extensively to completely replaced by euhedral dolomite crystals, but the interstitial material of the oolitic limestone was completely free of dolomitization. The selective dolomitization ...
In general, burial dolomitization models are essentially hydrological models which differ in terms of the drives and direction of fluid flow 31 and Mn contents and the presence of hightemperature...
The process of dolomitization, by which limestone is replaced by dolomite, has been studied for centuries, but there is still no cohesive understanding of how this occurs. It is particularly enigmatic because modern oceans are enriched in Mg, but dolomite does not precipitate directly from seawater in the same way that calcite does.
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