Masters Theses

Keywords and Phrases

Iron Springs; Sevier; Three Peaks; Thrust fault

Abstract

"The temporal and spatial distribution of strain associated with the Sevier Orogeny in western North America is significantly different in the southern end of the belt, at the latitude of Las Vegas, than further to the north at the latitude of Salt Lake City. Until this study, reasons for these differences were speculative as a lack of thrust kinematic data in the intervening region hindered along strike correlation across the belt. A crystallization age of 100.18 ± 14 0.04 Ma was determined for zircons extracted from a recently recognized ash fall tuff near the base of the synorogenic Iron Springs Formation at Three Peaks, Iron County, Utah. Field relationships and this age constrain movement on the Iron Springs thrust and the end of the sub-Cretaceous unconformity in the critical intervening area to latest Albian/earliest Cenomanian. Movement on the Iron Springs thrust and other Sevier thrusts at ~100 Ma is synchronous with a period of global plate reorganization and a high convergence rate for the Farallon Plate, which led to a Cordilleran arc flare-up event, and triggered widespread thrusting across the retroarc Sevier deformation belts. Based on these results, we suggest temporal and spatial variation along the strike of the orogenic belt are inherited from variation in the thickness of the rifted Precambrian craton"--Abstract, page iv.

Advisor(s)

Hogan, John Patrick

Committee Member(s)

Obrist-Farner, Jonathan
Wizevich, Michael C.

Department(s)

Geosciences and Geological and Petroleum Engineering

Degree Name

M.S. in Geology and Geophysics

Publisher

Missouri University of Science and Technology

Publication Date

Fall 2020

Journal article titles appearing in thesis/dissertation

  • The role of tectonic inheritance, plate reorganization, and magma flare-ups in the evolution of the Sevier Orogeny

Pagination

ix, 74 pages

Note about bibliography

Includes bibliographic references.

Rights

© 2020 James Daniel Quick, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Thesis Number

T 11797

Included in

Geology Commons

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