Chloritization


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chloritization

[‚klȯr·əd·ə′za·shən]
(chemistry)
The introduction of, production of, replacement by, or conversion into chlorite.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Chloritization

a metasomatic process in which the dark minerals of rocks and sometimes also the matrix itself are replaced by chlorites. Different types of chloritization are distinguished: regional postmagmatic chloritization of basic effusive rocks and their tuffs (seeGREENSTONE); chloritization of basic lavas associated with albitization (seeSPILITE) and of the dark minerals of acidic and intermediate igneous rocks (for example, the biotite and hornblende in granitoids); and hydrothermal chloritization of various rocks as a commonly occurring type of alteration near ores (seePROPYLITIZATION). The development of linear zones of chloritization indicates the presence of hydrothermal ore deposits.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Chloritization of smectite, usually with corrensite as a transition phase, is a basic process of a change for 2:1 trioctahedral clay minerals (Ca and Mg smectite).
CORRENSITE IN ALBIC LUVISOL AT PODMOKLY (KRIVOKLATSKO PROTECTED LANDSCAPE AREA, CZECH REPUBLIC)
These features likely reflect hydrothermal alteration (e.g., silicification, sericitization, and chloritization), as indicated by petrographic observation, and are not the result of magmatic fractionation.
Petrochemical evolution of subvolcanic granitoid intrusions within the late Devonian Mount Pleasant Caldera, southwestern New Brunswick, Canada: comparison of Au versus Sn-W-Mo-polymetallic mineralization systems
Epidotization and chloritization can be seen in fractures.
Metallogenic Dynamics Background of Ga'erqiong Cu-Au Deposit in Tibet, China/Origen de las dinamicas metalogenicas para el yacimiento de cobre y oro Ga'erqiong en Tibet, China
In active orogenic belt hydrothermal fluids alter feldspar and plagioclase into extremely fine grained quartz and mica in the form of muscovite or sericite by sericitization while the same fluids alter biotite and garnets into chlorite by chloritization. Similarly the intergrowth reaction between plagioclase and k-feldspar produces fine blebs of quartz by myrmekitization which is extremely susceptible to ASR.
Petrographic study of coarse aggregate to evaluate their susceptibility to Alkali Silica Reactivity in different rocks of District Shangla Swat Pakistan
and Amouric, M.: 1984, Biotite chloritization by interlayer brucitization as seen by HRTEM.
Phyllosilicates in the sediment-forming processes: weathering, erosion, transportation, and deposition
the last Hercynian phase of folding, the overthrusting of the basement by the cover rocks with lamination of the dolomite and country rock, the percolation of magnesian hydrothermal fluids and chloritization of the aluminosilicate facies (mica schist, aplite, pegmatite), and finally metasomatic "talcification" of the dolomite and siliceous rocks.
The Trimouns quarry: Luzenac, Ariege, France
This displacement is accompanied by hydrothermal alteration of granodiorite porphyries (chloritization and albitization).
Ti-rich granodiorite porphyries from the northeastern margin of the Klenov massif (Moldanubian Zone of the Bohemian Massif)
Silicification, sericitisation and chloritization are the principal alteration types observed in the mine.
Oronorte gold mine, Colombia

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