Structure of the southern Jalisco subduction zone, Mexico, as inferred from gravity and seismicity
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| Formato: | Artículo científico |
| Lenguaje: | en |
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Universidad Nacional Autónoma de México
1999
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| _version_ | 1876435017726427136 |
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| author | W. Bandy |
| author_facet | W. Bandy |
| contents | Structure of the southern Jalisco subduction zone, Mexico, as inferred from gravity and seismicity W. Bandy M. Mena A. Hurtado Díaz V. Kostoglodov Ciencias de la Tierra Gravity tectonics Jalisco block western Mexico crustal structure A type-model of the geological structure of the Jalisco subduction zone was determined by matching gravity anomaliesobserved along a profile perpendicular to the Jalisco coast near Barra de Navidad with the gravitational attraction of a geologiccross section constrained by seismicity data. The thickness of the continental crust of the Jalisco block averages ~38 km, andgradually thickens eastward reaching a maximum thickness of 44 km. The density of the upper part of the subducting lithosphereincreases at a depth of ~30 km, perhaps reflecting a phase transition of basalt to eclogite as has been proposed for the Chilesubduction zone. The upper mantle west of the trench exhibits lower densities relative to the rest of the upper mantle. This lowdensity zone is thickest near the East Pacific Rise and thins eastward towards the Middle America Trench, and may reflect a broadzone of magma emplacement along the East Pacific Rise, similar to that observed at the East Pacific Rise at 16ES. 1999 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56838301 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.3 Vol.38 |
| format | Artículo científico |
| id | redalyc_56838301 |
| institution | Redalyc |
| language | en |
| publishDate | 1999 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | Structure of the southern Jalisco subduction zone, Mexico, as inferred from gravity and seismicity W. Bandy Ciencias de la Tierra Gravity tectonics Jalisco block western Mexico crustal structure Structure of the southern Jalisco subduction zone, Mexico, as inferred from gravity and seismicity W. Bandy M. Mena A. Hurtado Díaz V. Kostoglodov Ciencias de la Tierra Gravity tectonics Jalisco block western Mexico crustal structure A type-model of the geological structure of the Jalisco subduction zone was determined by matching gravity anomaliesobserved along a profile perpendicular to the Jalisco coast near Barra de Navidad with the gravitational attraction of a geologiccross section constrained by seismicity data. The thickness of the continental crust of the Jalisco block averages ~38 km, andgradually thickens eastward reaching a maximum thickness of 44 km. The density of the upper part of the subducting lithosphereincreases at a depth of ~30 km, perhaps reflecting a phase transition of basalt to eclogite as has been proposed for the Chilesubduction zone. The upper mantle west of the trench exhibits lower densities relative to the rest of the upper mantle. This lowdensity zone is thickest near the East Pacific Rise and thins eastward towards the Middle America Trench, and may reflect a broadzone of magma emplacement along the East Pacific Rise, similar to that observed at the East Pacific Rise at 16ES. 1999 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56838301 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.3 Vol.38 |
| title | Structure of the southern Jalisco subduction zone, Mexico, as inferred from gravity and seismicity |
| topic | Ciencias de la Tierra Gravity tectonics Jalisco block western Mexico crustal structure |
| url | https://www.redalyc.org/articulo.oa?id=56838301 |