| Type of Document |
Dissertation |
| Author |
Tan, Eh
|
| Author's Email Address |
tan2 AT gps.caltech.edu |
| URN |
etd-05142006-210236 |
| Persistent URL |
http://resolver.caltech.edu/CaltechETD:etd-05142006-210236 |
| Title |
I. Multi-scale dynamics of mantle plumes and II. Compressible thermo-chemical convection and the stability of mantle superplumes |
| Degree |
PhD |
| Option |
Geophysics |
| Advisory Committee |
| Advisor Name |
Title |
| T.J. Ahrens |
Committee Chair |
| D.V. Helmberger |
Committee Member |
| David John Stevenson |
Committee Member |
| Jeroen Tromp |
Committee Member |
| Michael Gurnis |
Committee Member |
|
| Keywords |
- thermo-chemical convection
- solver coupling
- plumes
- mantle convection
- superplumes
- GeoFramework
|
| Date of Defense |
2006-05-02 |
| Availability |
unrestricted |
Abstract
The dynamic interaction of mantle plumes with subducted slabs and plate-scale flow is studied in Part I. We found that plumes preferentially develop on the edge of slabs and that a substantial amount of hot mantle can be trapped beneath slabs over long periods of time, leading to "mega-plume" formation. We used the solver-coupling technique to study the deflection of plume conduits and compare our result with the parameterized approach. The stability of mantle superplumes in compressible thermo-chemical convection is studied in Part II. The depth-dependent chemical density profile, caused by composition-dependent compressibility, is the preferred mechanism to stabilize the superplum
|
| Files |
| Filename |
Size |
Approximate Download Time
(Hours:Minutes:Seconds)
|
| 28.8 Modem |
56K Modem |
ISDN (64 Kb) |
ISDN (128 Kb) |
Higher-speed Access |
| |
0Thesis.pdf |
6.34 Mb |
00:29:22 |
00:15:06 |
00:13:12 |
00:06:36 |
00:00:33 |
| |
animation2-1.mov |
191.62 Kb |
00:00:53 |
00:00:27 |
00:00:23 |
00:00:11 |
00:00:01 |
| |
animation2-2.mov |
906.75 Kb |
00:04:11 |
00:02:09 |
00:01:53 |
00:00:56 |
00:00:04 |
| |
animation2-3.mov |
47.99 Kb |
00:00:13 |
00:00:06 |
00:00:05 |
00:00:02 |
< 00:00:01 |
| |
animation2-4.mov |
274.28 Kb |
00:01:16 |
00:00:39 |
00:00:34 |
00:00:17 |
00:00:01 |
| |
animation3-1.mov |
6.37 Mb |
00:29:29 |
00:15:10 |
00:13:16 |
00:06:38 |
00:00:33 |
|
