A model for Mexican neotectonics based on nationwide GPS measurements, 1993-2001
We combine velocities for 14 continuously operating GPS stations spanning Mexico, GPS sites on Socorro and Clarion islands on the Pacific plate west of Mexico, and 178 GPS sites on the North American and Pacific plates to derive plate-based reference frames suitable for GPS-based studies of North Am...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Universidad Nacional Autónoma de México, Instituto de Geofísica
2004-10-01
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| Series: | Geofísica Internacional |
| Subjects: | |
| Online Access: | http://www.geofisica.unam.mx/unid_apoyo/editorial/publicaciones/investigacion/geofisica_internacional/anteriores/2004/03/M%E1rquez.pdf |
| _version_ | 1797765916712239104 |
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| author | Charles DeMets Francisco Correa-Mora Enrique Cabral-Cano Bertha Márquez-Azúa |
| author_facet | Charles DeMets Francisco Correa-Mora Enrique Cabral-Cano Bertha Márquez-Azúa |
| author_sort | Charles DeMets |
| collection | DOAJ |
| description | We combine velocities for 14 continuously operating GPS stations spanning Mexico, GPS sites on Socorro and Clarion islands on the Pacific plate west of Mexico, and 178 GPS sites on the North American and Pacific plates to derive plate-based reference frames suitable for GPS-based studies of North American plate neotectonics. The motions of sites in Mexico north of and including Oaxaca are consistent with North American plate motion, implying negligible slip across the Mexican Volcanic Belt.Sites in the Yucatán peninsula move 3±1 mm/yr eastward relative to the North American plate. Velocities for new GPS sites on Clarión and Socorro islands are consistent within their uncertainties with Pacific plate motion, and provide useful new constraints on Pacific plate motion. Pacific-North America motion in the southern Gulf of California is 50.8±0.5 mm/yr toward S55°E±0.5° degrees. This is consistent with 50-52 mm/yr geologic estimates, but slower than recently published 52-53 mm/yr geodetic estimates. Southeastward motion of La Paz near the tip of Baja California relative to the Pacific plate agrees with previous results suggesting that Baja California is detached from the Pacific plate. The new plate angular velocity vectors amount to a well-constrained, geologically stable reference frame. |
| first_indexed | 2024-03-12T20:18:01Z |
| format | Article |
| id | doaj.art-efefa7d7b37f4604bb4c645baa0b334f |
| institution | Directory Open Access Journal |
| issn | 0016-7169 |
| language | English |
| last_indexed | 2024-03-12T20:18:01Z |
| publishDate | 2004-10-01 |
| publisher | Universidad Nacional Autónoma de México, Instituto de Geofísica |
| record_format | Article |
| series | Geofísica Internacional |
| spelling | doaj.art-efefa7d7b37f4604bb4c645baa0b334f2023-08-02T01:14:07ZengUniversidad Nacional Autónoma de México, Instituto de GeofísicaGeofísica Internacional0016-71692004-10-01433319339A model for Mexican neotectonics based on nationwide GPS measurements, 1993-2001Charles DeMetsFrancisco Correa-MoraEnrique Cabral-CanoBertha Márquez-AzúaWe combine velocities for 14 continuously operating GPS stations spanning Mexico, GPS sites on Socorro and Clarion islands on the Pacific plate west of Mexico, and 178 GPS sites on the North American and Pacific plates to derive plate-based reference frames suitable for GPS-based studies of North American plate neotectonics. The motions of sites in Mexico north of and including Oaxaca are consistent with North American plate motion, implying negligible slip across the Mexican Volcanic Belt.Sites in the Yucatán peninsula move 3±1 mm/yr eastward relative to the North American plate. Velocities for new GPS sites on Clarión and Socorro islands are consistent within their uncertainties with Pacific plate motion, and provide useful new constraints on Pacific plate motion. Pacific-North America motion in the southern Gulf of California is 50.8±0.5 mm/yr toward S55°E±0.5° degrees. This is consistent with 50-52 mm/yr geologic estimates, but slower than recently published 52-53 mm/yr geodetic estimates. Southeastward motion of La Paz near the tip of Baja California relative to the Pacific plate agrees with previous results suggesting that Baja California is detached from the Pacific plate. The new plate angular velocity vectors amount to a well-constrained, geologically stable reference frame.http://www.geofisica.unam.mx/unid_apoyo/editorial/publicaciones/investigacion/geofisica_internacional/anteriores/2004/03/M%E1rquez.pdfGpsstable reference framestectonic plates |
| spellingShingle | Charles DeMets Francisco Correa-Mora Enrique Cabral-Cano Bertha Márquez-Azúa A model for Mexican neotectonics based on nationwide GPS measurements, 1993-2001 Geofísica Internacional Gps stable reference frames tectonic plates |
| title | A model for Mexican neotectonics based on nationwide GPS measurements, 1993-2001 |
| title_full | A model for Mexican neotectonics based on nationwide GPS measurements, 1993-2001 |
| title_fullStr | A model for Mexican neotectonics based on nationwide GPS measurements, 1993-2001 |
| title_full_unstemmed | A model for Mexican neotectonics based on nationwide GPS measurements, 1993-2001 |
| title_short | A model for Mexican neotectonics based on nationwide GPS measurements, 1993-2001 |
| title_sort | model for mexican neotectonics based on nationwide gps measurements 1993 2001 |
| topic | Gps stable reference frames tectonic plates |
| url | http://www.geofisica.unam.mx/unid_apoyo/editorial/publicaciones/investigacion/geofisica_internacional/anteriores/2004/03/M%E1rquez.pdf |
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