A model for Mexican neotectonics based on nationwide GPS measurements, 1993-2001
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| Format: | Artículo científico |
| Langue: | en |
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Universidad Nacional Autónoma de México
2004
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| _version_ | 1876432451723591680 |
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| author | Bertha Márquez Azúa |
| author_facet | Bertha Márquez Azúa |
| contents | A model for Mexican neotectonics based on nationwide GPS measurements, 1993-2001 Bertha Márquez Azúa Charles DeMets Enrique Cabral Cano Francisco Correa Mora Ciencias de la Tierra GPS tectonic plates stable reference frames We combine velocities for 14 continuously operating GPS stations spanning Mexico, GPS sites on Socorro and Clarionislands on the Pacific plate west of Mexico, and 178 GPS sites on the North American and Pacific plates to derive plate-basedreference frames suitable for GPS-based studies of North American plate neotectonics. The motions of sites in Mexico north ofand including Oaxaca are consistent with North American plate motion, implying negligible slip across the Mexican VolcanicBelt.Sites in the Yucatán peninsula move 3±1 mm/yr eastward relative to the North American plate. Velocities for new GPS siteson Clarión and Socorro islands are consistent within their uncertainties with Pacific plate motion, and provide useful new constraintson Pacific plate motion. Pacific-North America motion in the southern Gulf of California is 50.8±0.5 mm/yr towardS55°E±0.5° degrees. This is consistent with 50-52 mm/yr geologic estimates, but slower than recently published 52-53 mm/yrgeodetic estimates. Southeastward motion of La Paz near the tip of Baja California relative to the Pacific plate agrees withprevious results suggesting that Baja California is detached from the Pacific plate. The new plate angular velocity vectors amountto a well-constrained, geologically stable reference frame. 2004 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56843302 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.3 Vol.43 |
| format | Artículo científico |
| id | redalyc_56843302 |
| institution | Redalyc |
| language | en |
| publishDate | 2004 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | A model for Mexican neotectonics based on nationwide GPS measurements, 1993-2001 Bertha Márquez Azúa Ciencias de la Tierra GPS tectonic plates stable reference frames A model for Mexican neotectonics based on nationwide GPS measurements, 1993-2001 Bertha Márquez Azúa Charles DeMets Enrique Cabral Cano Francisco Correa Mora Ciencias de la Tierra GPS tectonic plates stable reference frames We combine velocities for 14 continuously operating GPS stations spanning Mexico, GPS sites on Socorro and Clarionislands on the Pacific plate west of Mexico, and 178 GPS sites on the North American and Pacific plates to derive plate-basedreference frames suitable for GPS-based studies of North American plate neotectonics. The motions of sites in Mexico north ofand including Oaxaca are consistent with North American plate motion, implying negligible slip across the Mexican VolcanicBelt.Sites in the Yucatán peninsula move 3±1 mm/yr eastward relative to the North American plate. Velocities for new GPS siteson Clarión and Socorro islands are consistent within their uncertainties with Pacific plate motion, and provide useful new constraintson Pacific plate motion. Pacific-North America motion in the southern Gulf of California is 50.8±0.5 mm/yr towardS55°E±0.5° degrees. This is consistent with 50-52 mm/yr geologic estimates, but slower than recently published 52-53 mm/yrgeodetic estimates. Southeastward motion of La Paz near the tip of Baja California relative to the Pacific plate agrees withprevious results suggesting that Baja California is detached from the Pacific plate. The new plate angular velocity vectors amountto a well-constrained, geologically stable reference frame. 2004 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56843302 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.3 Vol.43 |
| title | A model for Mexican neotectonics based on nationwide GPS measurements, 1993-2001 |
| topic | Ciencias de la Tierra GPS tectonic plates stable reference frames |
| url | https://www.redalyc.org/articulo.oa?id=56843302 |