Electronic Theses and Dissertations

Identifier

6524

Date

2019

Document Type

Thesis

Degree Name

Master of Science

Major

Earth Sciences

Committee Chair

Charles Langston

Committee Member

Christine Powell

Committee Member

Randall Cox

Abstract

The IRIS Consortium conducted an experiment in Oklahoma in the summer of 2016 using a 3-line array originally intended for a reflection survey. We identified phase conversions in the crust with passive seismic sources. A major Sp phase conversion was identified at 0.5 km with several other large conversions evident between ~1.5 and 2.5 km depth across all profiles and events. The 0.5 km depth conversion correlates to the base of the Permian red-bed sandstones and shales, and the top of the Pennsylvanian limestones/shales/sandstones. The conversions between 1.5 and 2.5 kilometers depth correspond to the top of the Cambrian granites and the Pre-Cambrian basement. Synthetic seismograms were used to validate the structural imaging results and acceptably produced conversions at 0.5 and 1.5-2.5 km depth for a hypothetical strike-slip event. The final results demonstrate that passive arrays installed at dense receiver spacing can reliably image crustal stratigraphy in the absence of active sources.

Comments

Data is provided by the student.

Library Comment

Dissertation or thesis originally submitted to the local University of Memphis Electronic Theses & dissertation (ETD) Repository.

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