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Authigenic Kaolinite and Dickite Associated with Metal Sulfides—Probable Indicators of a Regional Thermal Event

Published online by Cambridge University Press:  02 April 2024

W. D. Keller
W. D. Keller*
Affiliation:
Geology Department, University of Missouri-Columbia, Columbia, Missouri 65211
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Abstract

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Authigenic, well-crystallized kaolinite and dickite occur within sulfide mineral deposits (mine-size to hand-specimen size occurrences) of the Mississippi Valley type in Arkansas, Kansas, Missouri, Iowa, Wisconsin, Illinois, and Indiana. Fluid inclusions in these rocks indicate temperatures of formation as high as 140°C. These authigenic kaolin-group minerals are probable geologic indicators of a regional thermal event. Such elevated temperatures are probably the result of heated waters derived from deeply buried sedimentary or tectonic basins, of passage of the region over a hot spot, or of an episode of thinning of the crustal plate in the mid-continent region.

Keywords

DickiteKaoliniteMetallic oresMorphologyRegional thermal event
Type
Research Article
Information
Clays and Clay Minerals , Volume 36 , Issue 2 , April 1988 , pp. 153 - 158
Copyright
Copyright © 1988, The Clay Minerals Society

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