dor_id: 4132152

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336.#.#.b: article

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336.#.#.a: Artículo

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351.#.#.b: Geofísica Internacional

351.#.#.a: Artículos

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856.4.0.u: http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/226/220

100.1.#.a: Domínguez, Jaime; Suárez Reynoso, Gerardo; Comte, Diana; Quintanar Robles, Luis

524.#.#.a: Domínguez, Jaime, et al. (2006). Seismic velocity structure of the Guerrero gap, Mexico. Geofísica Internacional; Vol. 45 Núm. 2: Abril 1, 2006; 129-139. Recuperado de https://repositorio.unam.mx/contenidos/4132152

245.1.0.a: Seismic velocity structure of the Guerrero gap, Mexico

502.#.#.c: Universidad Nacional Autónoma de México

561.1.#.a: Instituto de Geofísica, UNAM

264.#.0.c: 2006

264.#.1.c: 2006-04-01

653.#.#.a: Estructura de velocidades sísmicas; bloques de velocidad; inversión sísmica; Seismic velocity structure; velocity blocks; seismic inversion

506.1.#.a: La titularidad de los derechos patrimoniales de esta obra pertenece a las instituciones editoras. Su uso se rige por una licencia Creative Commons BY-NC-SA 4.0 Internacional, https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode.es, para un uso diferente consultar al responsable jurídico del repositorio por medio del correo electrónico revistagi@igeofisica.unam.mx

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520.3.#.a: A two-dimensional velocity structure of the Guerrero gap was obtained by applying a damped least square method to hypocenters of local seismicity recorded by a telemetric network situated on the Guerrero coast, above Cocos plate subduction zone. The region was parameterized by a mesh of 64 cubes in six layers, a total of 384 blocks. The results of 3-D inversion showed that differences of P-wave velocity values among blocks along the strike of the subduction zone were ~0.25 km/s, effectively showing a two-dimensional symmetry. A 2-D inversion taking into account velocity similarities among the 2-D bands generated megablocks. A final inversion procedure yields P-wave velocity values ranging from 5.4 to 8.2 km/s, and S-wave values from 3.2 and 4.7 km/s, suggesting a continental crust with a thickness of ~32 km composed of four flat megablocks with a P-wave velocity interval of 5.4 to 7.1 km/s. The Moho interface lies at ~32 km depth and above a mantle wedge between continental and oceanic crust. The downgoing oceanic crust has three layers (7.2-7.7 km/s), dipping at an angle of ~26°. A sharp velocity change at a depth of ~30 km suggests a phase change from basalt to eclogite (7.2 to 7.6 km/s). The mantle has an average velocity of 8.2 km/s. The new velocity model reduced the error in locations and fits better the characteristics of the Guerrero gap.doi: https://doi.org/10.22201/igeof.00167169p.2006.45.2.187

773.1.#.t: Geofísica Internacional; Vol. 45 Núm. 2: Abril 1, 2006; 129-139

773.1.#.o: http://revistagi.geofisica.unam.mx/index.php/RGI

022.#.#.a: ISSN-L: 2954-436X; ISSN impreso: 0016-7169

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300.#.#.a: Páginas: 129-139

264.#.1.b: Instituto de Geofísica, UNAM

doi: https://doi.org/10.22201/igeof.00167169p.2006.45.2.187

handle: 00b0782b721b72fb

harvesting_date: 2023-06-20 16:00:00.0

856.#.0.q: application/pdf

file_creation_date: 2006-10-05 17:54:43.0

file_modification_date: 2022-05-27 17:26:17.0

file_creator: Domínguez J., Suárez G., Comte D., Quintanar L.

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245.1.0.b: Seismic velocity structure of the Guerrero gap, Mexico

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Artículo

Seismic velocity structure of the Guerrero gap, Mexico

Domínguez, Jaime; Suárez Reynoso, Gerardo; Comte, Diana; Quintanar Robles, Luis

Instituto de Geofísica, UNAM, publicado en Geofísica Internacional, y cosechado de Revistas UNAM

Licencia de uso

Procedencia del contenido

Entidad o dependencia
Instituto de Geofísica, UNAM
Revista
Repositorio
Contacto
Revistas UNAM. Dirección General de Publicaciones y Fomento Editorial, UNAM en revistas@unam.mx

Cita

Domínguez, Jaime, et al. (2006). Seismic velocity structure of the Guerrero gap, Mexico. Geofísica Internacional; Vol. 45 Núm. 2: Abril 1, 2006; 129-139. Recuperado de https://repositorio.unam.mx/contenidos/4132152

Descripción del recurso

Autor(es)
Domínguez, Jaime; Suárez Reynoso, Gerardo; Comte, Diana; Quintanar Robles, Luis
Tipo
Artículo de Investigación
Área del conocimiento
Físico Matemáticas y Ciencias de la Tierra
Título
Seismic velocity structure of the Guerrero gap, Mexico
Fecha
2006-04-01
Resumen
A two-dimensional velocity structure of the Guerrero gap was obtained by applying a damped least square method to hypocenters of local seismicity recorded by a telemetric network situated on the Guerrero coast, above Cocos plate subduction zone. The region was parameterized by a mesh of 64 cubes in six layers, a total of 384 blocks. The results of 3-D inversion showed that differences of P-wave velocity values among blocks along the strike of the subduction zone were ~0.25 km/s, effectively showing a two-dimensional symmetry. A 2-D inversion taking into account velocity similarities among the 2-D bands generated megablocks. A final inversion procedure yields P-wave velocity values ranging from 5.4 to 8.2 km/s, and S-wave values from 3.2 and 4.7 km/s, suggesting a continental crust with a thickness of ~32 km composed of four flat megablocks with a P-wave velocity interval of 5.4 to 7.1 km/s. The Moho interface lies at ~32 km depth and above a mantle wedge between continental and oceanic crust. The downgoing oceanic crust has three layers (7.2-7.7 km/s), dipping at an angle of ~26°. A sharp velocity change at a depth of ~30 km suggests a phase change from basalt to eclogite (7.2 to 7.6 km/s). The mantle has an average velocity of 8.2 km/s. The new velocity model reduced the error in locations and fits better the characteristics of the Guerrero gap.doi: https://doi.org/10.22201/igeof.00167169p.2006.45.2.187
Tema
Estructura de velocidades sísmicas; bloques de velocidad; inversión sísmica; Seismic velocity structure; velocity blocks; seismic inversion
Idioma
spa
ISSN
ISSN-L: 2954-436X; ISSN impreso: 0016-7169

Enlaces