Dolomitization - Wikipedia
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]
Dolomitization | Carbonate, Sedimentary, Diagenesis | 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(CO3)2, replaces the calcite (calcium carbonate, CaCO3) in the rock, volume for volume.
Dolomites and dolomitization | SpringerLink
2013年1月1日 · Two types of dolomite formation are common, that is, dolomitization, which is the replacement of CaCO 3 by CaMg (CO 3) 2, and dolomite cementation, which is the precipitation of dolomite from aqueous solution in primary or secondary pore spaces. The term dolomitization is also, yet incorrectly, applied to dolomite cementation.
Dolomite | Formation, Structure, Properties, Uses, & Facts
The most widely discussed models for dolomitization, either partial or complete, involve four chief variables: time, location with respect to the sediment-seawater interface, composition and derivation of the solutions involved, and fluxing mechanisms.
Concepts and models of dolomitization: a critical reappraisal
2004年1月1日 · Traditionally, dolomitization models in near-surface and shallow diagenetic settings are defined and/or based on water chemistry, but on hydrology in burial diagenetic settings. In this paper, however, the various dolomite models are placed into appropriate diagenetic settings.
Dolomitization - an overview | ScienceDirect Topics
Dolomitization occurs in nature or even in untied limestone deposit or in already solid limestone rocks. Dolomites that occur in the untied deposit are called early diagenetic or sin-sedimentary. It also forms by dolomitization of limestone as late-diagenetic or postsedimentary events.
Dolomitization process and its implications for porosity …
2015年7月1日 · Dolomite cements significantly reduce the permeability of dolostones. High-quality reservoirs in the third member of Lower Triassic Feixianguan Formation in the Jiannan area are exclusively restricted to dolostone, which makes it essential …
Dolomite and Dolomitization | SpringerLink
2018年1月1日 · Dolomite is a trigonal–rhombohedral, ordered Ca, Mg carbonate mineral (CaMg (CO 3) 2) occurring primarily in sedimentary and metamorphic rocks. Dolomitization is the process in which Mg ions replace Ca ions in a calcium carbonate mineral.
Modern dolomite formation caused by seasonal cycling of …
2021年2月18日 · To decode the enigma of ancient dolomite, we examined a modern dolomite forming environment, and found that a cyclic shift in microbial community between cyanobacteria and anoxygenic phototrophs...
Dolomitization: from conceptual to numerical models
2004年1月1日 · Dolomitization requires not only favourable thermodynamic and kinetic conditions, but also a fluid-flow mechanism to transport reactants to and products from the site of dolomitization. This paper reviews work that seeks to provide a quantitative framework for conceptual models of dolomitization, using analytical and, particularly, numerical ...