Artículo

Submarine topography and faulting in Bahía de Banderas, Mexico

Alvarez, Román

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

Alvarez, Román. (2007). Submarine topography and faulting in Bahía de Banderas, Mexico. Geofísica Internacional; Vol. 46 No. 2, 2007. Recuperado de https://repositorio.unam.mx/contenidos/42702

Descripción del recurso

Autor(es)
Alvarez, Román
Tipo
Artículo de Investigación
Área del conocimiento
Físico Matemáticas y Ciencias de la Tierra
Título
Submarine topography and faulting in Bahía de Banderas, Mexico
Fecha
2010-10-18
Resumen
A digital elevation model of Bahía de Banderas and its offshore continuation to the Middle America Trench (MAT) is built from a data set of 6872 bathymetric soundings. Two new, offshore basins and several, previously unknown faults within the bay are also identified. The south flank of Banderas canyon is considerably steeper than the north one. This asymmetry and the seismic activity present lead to propose that Banderas Canyon has a half-graben structure of the fault growth type, and reverse drag geometry, which originates in an extensional basin oriented N-S. The canyon is divided in two sections that trend in different directions. The older section of the canyon, trending E-W, is probably Late Miocene; the associated Banderas Fault is suggested to extend westward, down to the MAT along a section that complements that of the half-graben. The section of Banderas Canyon trending NE and continuing into Banderas Valley is identified as a younger portion of the structure. The older and the younger portions of the canyon appear to be active presently. A group of faults also trending NE seem to be associated with the change in direction of the canyon. These results support the hypothesis that the structure of Banderas Canyon is a half-graben, and strengthen the idea that it is the limit between the region to the north that underwent extension in the Miocene, and the region to the south that did not experienced it.
Tema
Bahía de Banderas; estructura de semi-graben; Cañón de Banderas; MDE submarino; cuenca de extensión; Bahía de Banderas; half-graben structure; Banderas canyon; submarine DEM; extensional basin
Idioma
spa
ISSN
0016-7169

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