Author

Scott Prinos

Publication Date

1995

Document Type

Dissertation/Thesis

First Advisor

Perry, Eugene C., 1933-

Degree Name

M.S. (Master of Science)

Department

Department of Geology

LCSH

Geology--Mexico--Yucatán (State)||Dolomite--Mexico--Yucatán (State)

Abstract

Dolomite has been found in two flooded cave systems (cenotes) near Merida in the Yucatan Peninsula, Mexico. This dolomite occurs at or near to the fresh- and marine-water mixing zones of both cenotes. Petrographic analysis shows that at least some of the dolomite in each cave system was most probably formed by mixing-zone dolomitization. This dolomite must have formed following submergence of the cave systems, which, based upon radio-carbon dating of ash from a fire pit, could have occurred no earlier than 8250 ± 80 yr BP. Thermodynamic modeling, based on analyses of water samples from the cenotes, indicates that dolomite precipitation is probably favored in one or both cenotes, depending on the extent of ordering in the samples compared to that modeled. Chemical interactions; changes in the level of the interface; and influxes of meteoric water, occurring within one or both cave systems, may be creating conditions that would kinetically favor the precipitation of dolomite.

Comments

Includes bibliographical references (pages [130]-133)

Extent

viii, 137 pages, maps

Language

eng

Publisher

Northern Illinois University

Rights Statement

In Copyright

Rights Statement 2

NIU theses are protected by copyright. They may be viewed from Huskie Commons for any purpose, but reproduction or distribution in any format is prohibited without the written permission of the authors.

Media Type

Text

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