Doctoral Dissertations

Abstract

"The conditions necessary for emplacement of Mississippi Valley-type mineral deposits can be expressed using mathematical symbols as a function of the pre-depositional topography of the host formation and post-depositional structure. These conditions can be observed and analyzed in the Missouri region from residual maps of trend surface analysis of the Precambrian surface. In areas where the topography prior to deposition of the ore bearing horizon has been strongly altered by the deposition of the basal Paleozoic formation the Lamotte Formation residual maps from trend surface analysis of the top of the Lamotte better illustrate these conditions. The Lamotte Formation in Missouri can be divided into five units. The characteristics of the formation vary upward from a basal arkose association through an unconformity sand association to a blanket sand association. The contact between the Lamotte and overlying Bonneterre Formation is generally conformable and gradational although in certain areas this contact may be unconformable. The character of the basal Bonneterre transition zone is strongly influenced by the proximity of Precambrian topographic highs. Some of the sand in the basal Bonneterre may have been derived from preexisting Lamotte"--Abstract, page ii.

Advisor(s)

Rockaway, John D.

Committee Member(s)

Beveridge, Thomas R. (Thomas Robinson), 1918-1978
Grant, S. Kerry
Aughenbaugh, N. B.
Spreng, Alfred C., 1923-2012

Department(s)

Geosciences and Geological and Petroleum Engineering

Degree Name

Ph. D. in Geology

Sponsor(s)

Missouri. Geological Survey

Publisher

University of Missouri--Rolla

Publication Date

1972

Pagination

ix, 161 pages

Note about bibliography

Includes bibliographical references (pages 72-75).

Geographic Coverage

Mississippi River Valley

Time Period

Precambrian
Paleozoic

Rights

© 1972 John Siegfried Trapp, All rights reserved.

Document Type

Dissertation - Open Access

File Type

text

Language

English

Subject Headings

Ore deposits -- Mississippi River Valley -- Mathematical models
Trend surface analysis
Geology, Stratigraphic -- Precambrian
Geology, Stratigraphic -- Paleozoic

Thesis Number

T 2757

Print OCLC #

6034224

Electronic OCLC #

887720419

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