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Palygorskite from Tertiary Formations of Eastern Saudi Arabia

Published online by Cambridge University Press:  02 April 2024

H. Shadfan ,
A. S. Mashhady ,
J. B. Dixon  and
A. A. Hussen
H. Shadfan
Affiliation:
Soil Science Department, Faculty of Agriculture, King Saud University, Riyadh, Saudi Arabia
A. S. Mashhady
Affiliation:
Soil Science Department, Faculty of Agriculture, King Saud University, Riyadh, Saudi Arabia
J. B. Dixon*
Affiliation:
Soil Science Department, Faculty of Agriculture, King Saud University, Riyadh, Saudi Arabia
A. A. Hussen
Affiliation:
Soil Science Department, Faculty of Agriculture, King Saud University, Riyadh, Saudi Arabia
*
1Department of Soil and Crop Sciences, Texas A&M University, College Station, Texas 77843.
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Abstract

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The occurrence of palygorskite in some Tertiary sediments in eastern Saudi Arabia was studied. Mineralogical and chemical analyses were made of samples from two sections several meters thick from the Umm er Radhuma and Dammam Formations of Paleocene and Eocene periods, respectively. Layers of shales were observed within the sections of the dolomitic-calcitic limestone of the Umm er Radhuma Formation and of the dolomitic limestone of the Dammam Formation. After treatment for carbonate removal the shales consisted of more than 95% clay-size particles, most of which were <0.2-μm in size. Palygorskite was the main constituent of some of the shales, with minor amounts of gypsum, soluble salts, and carbonates. The association of gypsum and other salts with palygorskite in the shale suggests that palygorskite formed in closed-basin environments. The presence of palygorskite and the absence of other minerals in the clay fraction of the limestones also suggests that the palygorskite formed under marine conditions.

Keywords

FiberLimestonePalygorskiteSaudi ArabiaShale
Type
Research Article
Information
Clays and Clay Minerals , Volume 33 , Issue 5 , October 1985 , pp. 451 - 457
Copyright
Copyright © 1985, The Clay Minerals Society

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