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SELF-CONSISTENT GENERATION OF LARGE ASPECT RATIO
OCEANIC PLATE AND SUBLITHOSPHERIC SMALL-SCALE CONVECTION
by
Zi-Yu Wu
A Thesis Presented to the
FACULTY OF THE USC GRADUATE SCHOOL
UNIVERSITY OF SOUTHERN CALIFORNIA
In Partial Fulfillment of the
Requirements for the Degree
MASTER OF SCIENCE
(GEOLOGICAL SCIENCES)
August 2010
Copyright 2010 Zi-Yu Wu
Object Description
| Title | Self-consistent generation of large aspect ratio oceanic plate and sublithospheric small-scale convection |
| Author | Wu, Zi-Yu |
| Author email | ziyuwu@usc.edu; wuziyu_pku@hotmail.com |
| Degree | Master of Science |
| Document type | Thesis |
| Degree program | Geological Sciences |
| School | College of Letters, Arts and Sciences |
| Date defended/completed | 2010-05-26 |
| Date submitted | 2010 |
| Restricted until | Unrestricted |
| Date published | 2010-08-09 |
| Advisor (committee chair) | Becker, Thorsten W. |
| Advisor (committee member) |
Sammis, Charles G. Miller, Meghan S. |
| Abstract | How large aspect ratio oceanic plate was generated from mantle convection is a long standing question. In the thesis, I present mainly bottom heated, whole mantle convection results with temperature-dependent viscosity and focus on searching for the condition under which aspect ratio oceanic plate could be generated via plastic yielding. At the relatively high Rayleigh number and high viscosity contrast with the yielding stress at the order of 100 MPa, large aspect ratio oceanic plate could be generated with high quality of the plate. An asthenospheric viscosity reduction is not required to promote long wavelength convection. This suggests that a weak asthenosphere might not be a significant factor that leads to long wavelength convection in the Earth. |
| Keyword | small-scale convection; plastic yielding; Rayleigh-Taylor instability; asthenosphere; rheology |
| 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 |
| Provenance | Electronically uploaded by the author |
| Type | texts |
| Legacy record ID | usctheses-m3351 |
| Rights | Wu, Zi-Yu |
| 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-Wu-3859 |
| Archival file | uscthesesreloadpub_Volume51/etd-Wu-3859.pdf |
Description
| Title | Page 1 |
| Full text | SELF-CONSISTENT GENERATION OF LARGE ASPECT RATIO OCEANIC PLATE AND SUBLITHOSPHERIC SMALL-SCALE CONVECTION by Zi-Yu Wu A Thesis Presented to the FACULTY OF THE USC GRADUATE SCHOOL UNIVERSITY OF SOUTHERN CALIFORNIA In Partial Fulfillment of the Requirements for the Degree MASTER OF SCIENCE (GEOLOGICAL SCIENCES) August 2010 Copyright 2010 Zi-Yu Wu |
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