| Autor: |
C.A. Mortera-Gutiérrez, V. Kostoglodov, W. L. Bandy |
| Jazyk: |
English<br />Spanish; Castilian |
| Rok vydání: |
1998 |
| Předmět: |
|
| Zdroj: |
Geofísica Internacional, Vol 37, Iss 3, Pp 153-169 (1998) |
| Druh dokumentu: |
article |
| ISSN: |
0016-7169 |
| Popis: |
Establishing an Euler pole/vector which accurately describes the present-day motion between the Rivera and Pacific plates has proved difficult. This is likely due to systematic errors in the plate motion data; errors arising from a SW migration of the Rivera-Pacific Euler pole during the past several million years. A new estimate of the present-day instantaneous Rivera-Pacific Euler pole is derived herein using only the most recently formed bathymetric features along the Rivera-Pacific boundaries. This Euler pole (24.62°N, 105.89°W) lies significantly SW of all the previous pole determinations, indicating a continued (2° or more) SW migration of the Rivera-Pacific Euler pole during the last 0.78 Ma. Although many uncertainties remain to be resolved, this migration provides a simple explanation for the discrepancies between predicted plate motions and (1) the observed azimuths of the eastern end of the Rivera transform, (2) the extensional morphology of the Rivera-Cocos boundary, and (3) the rates of RIV-NA and Cocos-North America motion across the Rivera-Cocos boundary as indicated from seismotectonic relationships. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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