2023年11月20日 Formation: Dolomite forms in various geological settings, typically through a process called dolomitization. This process involves
Consulter un spécialiste2015年5月1日 Abstract. Little is known about the physico-chemical processes that lead to the formation of dolomite in nature. Issues requiring further investigation include: (1) the
Consulter un spécialiste2021年2月18日 1 Altmetric. Metrics. Abstract. The “Dolomite Problem” has been a controversy for over a century, owing to massive assemblages of low-temperature
Consulter un spécialiste2023年11月23日 The impressive massif of the Dolomite Mountains in Northern Italy was formed almost entirely of CaMg(CO 3) 2, a calcium-magnesium carbonate mineral
Consulter un spécialiste2016年5月18日 Estimation of dolomite formation: Dolomite precipitation and dolomitization. Published: 18 May 2016. Volume 87 , pages 561–572, ( 2016 ) Cite this article.
Consulter un spécialisteDolomite may, thus, form through a temporal sequence of nanoscale mechanisms where kinetic barriers are subject to nanoscale interfacial energy distributions as part of a nonclassical pathway. These processes
Consulter un spécialiste2019年9月24日 Dolomite is formed when lime muds or limestone are modified by post-depositional chemical change. Dolomite is used as an aggregate in construction projects, and it is a kiln fired in the
Consulter un spécialiste2016年11月7日 Formation of fine crystalline dolomites in lacustrine carbonates of the Eocene Sikou Depression, Bohai Bay Basin, East China. Original Paper. Open access. Published: 07 November 2016. Volume 13
Consulter un spécialiste2018年7月6日 The fabric-destructive dolomite formed following the burial model at elevated temperatures; these rocks exhibit the lowest Sr and Na contents, δ 18 O values generally ranging from −7.01‰ to −6.62‰ (with
Consulter un spécialiste2021年3月23日 Attempts to solve the multifaceted “dolomite problem” have shed some light on important factors controlling dolomite formation including high salinity 5,6, dissolution–precipitation reaction ...
Consulter un spécialiste2023年11月20日 Dolomite is a mineral and a rock-forming mineral that is composed of calcium magnesium carbonate (CaMg(CO3)2). It is named after the French mineralogist Déodat Gratet de Dolomieu, who first
Consulter un spécialiste2020年8月5日 Introduction. The mineral dolomite [CaMg(CO 3) 2] was discovered by the geologist and mineralogist Déodat Gratet de Dolomieu during a journey through Northern Italy (De Dolomieu, 1791).Since Dolomieu's discovery, geologists have found that dolomite is a ubiquitous carbonate mineral, which mainly forms from seawater.
Consulter un spécialiste2018年10月1日 1. Dedolomitization: a review. Calcitization of dolomite, known as dedolomitization, is a very common process in carbonates, converting a dolostone into a limestone. On a 3D carbonate reservoir scale, dedolomites typically show a much lower abundance and a rather local or patchy occurrence compared to dolomite.
Consulter un spécialiste6 天之前 modifier. La dolomite est un minéral constitué d'un carbonate de calcium et de magnésium, de formule chimique CaMg (CO 3) 2, avec des traces de Fe, Mn, Co, Pb et Zn. Une roche constituée à plus de 50 % de dolomite est une dolomie .
Consulter un spécialiste2017年6月1日 Les carbonates de la Formation de Pekisko représentent un important gisement dans le Centre-Ouest de l’Alberta, surtout dans les champs le long de la bordure subaffleurante de Pekisko. ... Selon les analyses pétrographiques et géochimiques, on a identifié cinq types de dolomite dans la Formation de Pekisko: 1) dolomite
Consulter un spécialiste2023年5月16日 L’Encyclopédie de l’environnement est publiée par l’Association des Encyclopédies de l’Environnement et de l’Énergie (), contractuellement liée à l’université Grenoble Alpes et à Grenoble INP, et parrainée par l’Académie des sciences.Pour citer cet article : BAIZE Denis (9 juin 2023), La formation des sols sous climats tempérés,
Consulter un spécialiste2023年8月25日 7. Neutralisation des acides : En raison de sa réactivité avec les acides, la calcite est utilisée pour neutraliser les substances acides. Dans des industries comme l’agriculture et le traitement des eaux usées, la calcite est ajoutée pour équilibrer les niveaux de pH et réduire l’acidité des solutions. 8.
Consulter un spécialiste2020年2月5日 In contrast, dolomite is a common constituent of Precambrian sedimentary rocks (Warren, 2000). It is now clear that the precipitation of dolomite is a kinetic-controlled process and the formation of stoichiometric dolomite proceeds stepwise through a series of metastable precursors (Rodriguez-Blanco et al., 2015; Kaczmarek and Thornton, 2017).
Consulter un spécialiste2020年6月25日 In models, calcite and dolomite contents increased and the porosity de creased from 45% to about 35% through out the sedimentary-parasyngenetic stage (4 88–465 Ma),
Consulter un spécialiste6 天之前 La dolomie est une roche sédimentaire carbonatée composée d'au moins 50 % de dolomite [a], un carbonate double de calcium et de magnésium, de composition chimique CaMg(CO 3) 2, qui cristallise en prismes losangiques (rhomboèdres). Son nom dérive de celui du géologue, minéralogiste et volcanologue français Déodat de Dolomieu, qui
Consulter un spécialisteCharacteristics and Genesis Mechanism of the Dolomite Reservoir in the Ordovician Majiagou Formation in the Ordos Basin WU Dongxu 1,2,LI Chang 1,2*,ZHOU Jingao 1,2,HU Cong 3,HUANG Zhengliang 3,YU Zhou 1,2,#br# LI
Consulter un spécialiste2016年11月7日 The genesis of the fine crystalline dolomites that exhibit good to excellent reservoir properties in the upper fourth member of the Eocene Shahejie Formation (Es 4 s ) around the Sikou Sag, Bohai Bay
Consulter un spécialiste2017年10月17日 On the basis of wells and field outcrops, the development of the Lower Ordovician Tongzi Formation high-porosity dolomite reservoirs in the Sichuan Basin was closely related to meteoric erosions. However, the meteoric erosions did not occur under first-, second- or third-order sequence boundaries but were developed under high
Consulter un spécialiste2015年5月1日 Dolomite, CaMg(CO 3) 2, is one of the most common carbonate minerals in the geologic record (Machel 2004) and the most oversaturated carbonate mineral in the modern ocean (Tucker and Wright 1990).However, dolomite rarely forms in modern environmental systems (MacKenzie and Andersson 2013), which has led to considerable
Consulter un spécialiste2023年11月23日 The impressive massif of the Dolomite Mountains in Northern Italy was formed almost entirely of CaMg(CO 3) 2, a calcium-magnesium carbonate mineral discovered in 1791 by the French naturalist Déodat de Dolomieu (), who gave name to both the mineral—dolomite—and to the impressive Alpine rocky landscape considered by the
Consulter un spécialiste2023年1月28日 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, magnesian limestone. As the rocks often also contain variable amounts of quartz they are ...
Consulter un spécialiste2021年11月1日 The thick Upper Cambrian-Lower Ordovician carbonates of the Gucheng uplift (southeastern Tarim Basin, northwestern China) have been extensively dolomitized, leading to the formation of massive dolomite reservoirs. The origins of different dolomites and their original fluids were studied based on an integrated analysis of petrology,
Consulter un spécialiste2022年1月1日 The Cambrian Sanshanzi Formation is an important dolomite horizon in the Ordos Basin of northern China, and is well exposed in the western part of that basin. This paper focuses on the petrography and geochemistry of dolomites in this formation with an aim to provide a better understanding of their genesis. Reflux seepage, burial, and ...
Consulter un spécialiste