Title

Dolomitization and Dolomite Neomorphism in the Back Reef Facies of the Bonneterre and Davis Formations (Cambrian), Southeastern Missouri

Abstract

The back reef subfacies were deposited on tidal flats and in shallow lagoons that existed in the St. Francois Mountains of southeast Missouri during late Cambrian time. They were subjected to a complex diagenetic history involving both early and late diagenetic dolomitization and dolomite neomorphism. Fine crystalline, planar dolomite was formed during early diagenetic dolomitization of the cryptalgalaminate subfacies by a fluid approaching seawater composition. Coarse crystalline, nonplanar dolomite was formed as a result of neomorphism of pre-existing planar dolomite and dolomitization of peloid mudstones, after burial, accompanying mineralization in southeast Missouri.

Department(s)

Geosciences and Geological and Petroleum Engineering

Keywords and Phrases

Bonneterre Formation; Cambrian; Davis Formation; Dolomite; Lagoon; Limestone; Mineralization; Neomorphism; Sea Water; USA, Missouri

Geographic Coverage

Southeastern Missouri

Time Period

Cambrian

International Standard Serial Number (ISSN)

0022-4472

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1990 Society of Economic Paleontologists and Mineralogists, All rights reserved.

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