Crustal structure of the Colima rift, western Mexico: gravity models revisited
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| Format: | Artículo científico |
| Sprache: | en |
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Universidad Nacional Autónoma de México
1999
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| author | J. H. Flores Ruiz |
| author_facet | J. H. Flores Ruiz |
| contents | Crustal structure of the Colima rift, western Mexico: gravity models revisited J. H. Flores Ruiz C. A. Mortera Gutiérrez W. L. Bandy Ciencias de la Tierra Gravity Colima graben western Mexico crustal structure Two 250 km and 280 km long gravity transects, across the southern (SCR) and central (CCR) sectors of the Colima rift arereinterpreted. Spectral analysis is used to estimate statistical depths to major interfaces. Gravity anomalies are reinterpreted assuming:(1) that the gravity signal arises solely from deep sources at the crust-mantle boundary, and (2) that the signal arises froma combination of deep and shallow sources. We use vertical prisms or a polygon to model the Moho interface. The spectral depthsand the Moho topography are combined with available seismic data to construct layered crustal models with Talwani-type polygonalsource bodies. The crustal structure along the coast consists of an 80-90 km wide and 7-9 km deep graben, which constitutesthe offshore continuation of a 100 km wide graben, extending from just NW of Manzanillo to SE of Tecoman. The Moho shoalsunder the graben to about 17-18 km depth. Previous interpretations proposed an offshore profile of two grabens. The shallowcrustal structure inland features a 9-10 km deep asymmetric depression with a steep NW boundary. Granitic intrusions thickentowards the SE. The crust is 28-30 km thick along the CCR transect, and thins to 22 km beneath the western sector of the Colimagraben. 1999 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56838401 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.4 Vol.38 |
| format | Artículo científico |
| id | redalyc_56838401 |
| institution | Redalyc |
| language | en |
| publishDate | 1999 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | Crustal structure of the Colima rift, western Mexico: gravity models revisited J. H. Flores Ruiz Ciencias de la Tierra Gravity Colima graben western Mexico crustal structure Crustal structure of the Colima rift, western Mexico: gravity models revisited J. H. Flores Ruiz C. A. Mortera Gutiérrez W. L. Bandy Ciencias de la Tierra Gravity Colima graben western Mexico crustal structure Two 250 km and 280 km long gravity transects, across the southern (SCR) and central (CCR) sectors of the Colima rift arereinterpreted. Spectral analysis is used to estimate statistical depths to major interfaces. Gravity anomalies are reinterpreted assuming:(1) that the gravity signal arises solely from deep sources at the crust-mantle boundary, and (2) that the signal arises froma combination of deep and shallow sources. We use vertical prisms or a polygon to model the Moho interface. The spectral depthsand the Moho topography are combined with available seismic data to construct layered crustal models with Talwani-type polygonalsource bodies. The crustal structure along the coast consists of an 80-90 km wide and 7-9 km deep graben, which constitutesthe offshore continuation of a 100 km wide graben, extending from just NW of Manzanillo to SE of Tecoman. The Moho shoalsunder the graben to about 17-18 km depth. Previous interpretations proposed an offshore profile of two grabens. The shallowcrustal structure inland features a 9-10 km deep asymmetric depression with a steep NW boundary. Granitic intrusions thickentowards the SE. The crust is 28-30 km thick along the CCR transect, and thins to 22 km beneath the western sector of the Colimagraben. 1999 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56838401 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.4 Vol.38 |
| title | Crustal structure of the Colima rift, western Mexico: gravity models revisited |
| topic | Ciencias de la Tierra Gravity Colima graben western Mexico crustal structure |
| url | https://www.redalyc.org/articulo.oa?id=56838401 |