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DEFORMATION PATTERNS AND SUBDUCTION BEHAVIOR
OF CONTINENTAL LITHOSPHERE:
EFFECTS OF RHEOLOGY, SURFACE PROCESSES, AND MATERIAL
PARAMETERS
by
Clare Eugenia Steedman
A Thesis Presented to the
FACULTY OF THE GRADUATE SCHOOL
UNIVERSITY OF SOUTHERN CALIFORNIA
In Partial Ful llment of the
Requirements for the Degree
MASTER OF SCIENCE
(GEOLOGICAL SCIENCES)
August 2007
Copyright 2007 Clare Eugenia Steedman
Object Description
| Title | Deformation patterns and subduction behavior of continental lithosphere: effects of rheology, surface processes, and material parameters |
| Author | Steedman, Clare Eugenia |
| Author email | steedman@usc.edu |
| Degree | Master of Science |
| Document type | Thesis |
| Degree program | Geological Sciences |
| School | College of Letters, Arts and Sciences |
| Date defended/completed | 2007-05-18 |
| Date submitted | 2007 |
| Restricted until | Unrestricted |
| Date published | 2007-06-27 |
| Advisor (committee chair) | Becker, Thorsten W. |
| Advisor (committee member) |
Platt, John P. Okaya, David Kaus, Boris J.P. |
| Abstract | The continental Eurasian margin is subducting underneath the Philippine Sea Plate, the location of Taiwan. To better understand deformation patterns resulting from subduction of a passive continental margin, we perform 2-D numerical simulations. A particle-based visco-elasto-plastic thermo-mechanical finite element code is employed to study the dynamics of the system. I explore the parameters that are dominant in controlling near-surface structures, both with regards to changes in topography and rock exhumation over time, and subsurface features such as Moho undulations. In all cases I track surface uplift, subduction evolution and rock exhumation history. The results are compared to evidence from Taiwan where continental subduction or convergence is thought to be happening. Models that experience convergence and that have a weak lower crust form a mid-crustal doming structure, and erosion greatly affects crustal deformation and structure. |
| Keyword | geodynamics; continental subduction; Taiwan |
| Geographic subject (country) | Taiwan |
| Language | English |
| Part of collection | University of Southern California dissertations and theses |
| Publisher (of the original version) | University of Southern California |
| Place of publication (of the original version) | Los Angeles, California |
| Publisher (of the digital version) | University of Southern California. Libraries |
| Type | texts |
| Legacy record ID | usctheses-m563 |
| Rights | Steedman, Clare Eugenia |
| Repository name | Libraries, University of Southern California |
| Repository address | Los Angeles, California |
| Repository email | http://www.usc.edu/isd/libraries/services/ask_a_librarian/email/ |
| Filename | etd-Steedman-20070627 |
| Archival file | uscthesesreloadpub_Volume32/etd-Steedman-20070627.pdf |
Description
| Title | Page 1 |
| Full text | DEFORMATION PATTERNS AND SUBDUCTION BEHAVIOR OF CONTINENTAL LITHOSPHERE: EFFECTS OF RHEOLOGY, SURFACE PROCESSES, AND MATERIAL PARAMETERS by Clare Eugenia Steedman A Thesis Presented to the FACULTY OF THE GRADUATE SCHOOL UNIVERSITY OF SOUTHERN CALIFORNIA In Partial Ful llment of the Requirements for the Degree MASTER OF SCIENCE (GEOLOGICAL SCIENCES) August 2007 Copyright 2007 Clare Eugenia Steedman |
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