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Bentonite from the Eocene Castle Hayne Limestone

By
Paul A. Thayer
Paul A. Thayer
Mobil Oil Exploration & Producing Southeast Inc.
1250 Poydras Building New Orleans, LA 70113
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W. Burleigh Harris
W. Burleigh Harris
Department of Earth Sciences University of North Carolina at Wilmington Wilmington
,
NC 28403
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Victor A. Zullo
Victor A. Zullo
Department of Earth Sciences University of North Carolina at Wilmington Wilmington
,
NC 28403
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Published:
January 01, 1986

Abstract

Westward expansion of the Fussell Ouarry (see Fig. 5 of Road Log for location) has exposed a dark-gray clay lens in Castle Hayne Limestone. The clay is composed mainly of smectite, and by currrently accepted usage (Grim and Guven, 1978) can be termed bentonlte. This paper reports a geochemical, mineralogical and petrographical study of the bentonite and demonstrates its derivation from volcanogenic sediment.

Bentonite samples were studied by a variety of techniques, including: X-ray radiography; X-ray diffraction (XRD); scanning electron microscopy (SEM) with an energy dispersive X-ray analyzer (EDX); chemical analyses by X-ray fluorescence (XRF) and wet chemistry; and petrographic modal analyses of smear slides, thin sections and grain mounts.

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Contents

SEPM Field Trip Guidebook

Southeastern United States: Third Annual Midyear Meeting, 1986, Raleigh, North Carolina

Daniel A. Textoris
Daniel A. Textoris
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SEPM Society for Sedimentary Geology
Volume
5
ISBN electronic:
9781565762800
Publication date:
January 01, 1986

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