Kaolinization


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Ka`o`lin`i`za´tion


n.1.The process by which feldspar is changed into kaolin.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
and Bednarova, J.: 1995, Intergranular corrosion, infiltrational kaolinization, and epigenetically reddened limestones of the Bohemian Karst, and their influence on karst morphology.
This extreme clay content (Table 1) was possibly formed by feldspar kaolinization [18] as the alteration process changed the feldspar mineral in volcanic rocks into kaolinite minerals [17].
Volcanic host rocks have hydrothermally been altered and can be divided into four parts vertically: kaolinization, chloritization, epidotization, and silicification.
The Al2O3 content of clays depends upon the intensity of kaolinization.
The plot for this soil sample fell within the area of the chart classified as kaolinization, indicating that the soil sample was taken from a kaolinized profile.
The alkali feldspar (and to a less extent microcline) is largely medium grained and occurs as tabular and mostly subhedral perthitic grains showing the effects of kaolinization. Some of the perthitic alkali-feldspar grains show simple twinning.
Kaolinization of the feldspar has also occurred in the oxidized beds, although it primarily involved the plagioclase.
Fiore, "Interstratified Kaolinite-Smectite: Nature of the Layers and Mechanism of Smectite Kaolinization," American Mineralogist 91(1), 159-170 (2006).
Because of the wet, warm climate, feldspar crystals in near-surface pockets are often seen to be in the process of kaolinization. Their appearance is clearly different from that of crystals which have been "cleaned" with a solution of hydrochloric acid.
Carbonate cements of the fourth stage (Cc4) were euhedral fine crystalline ferrocalcites and ankerites, lying on the outer part of kaolinization feldspar or secondary pores dissolved by Cc3 (Figures 6(g) and 6(h)).
The granite rocks are highly fractured and sheared creating a suitable scenario for weathering, which in turn created vast and extensive zones of kaolinization and lateritization particularly in the low-lying areas surrounded by granite exposures.