Shallow crustal structure of the junction of the grabens of Chapala, Tepic-Zacoalco and Colima, Mexico
Gravity data is used to infer the shallow crustal structure of the Tepic graben adjacent to the City of Guadalajara. This depression does not constitute a symmetric graben with steep master faults but rather a complex transition zone. Blocks detached from the granitic sierras are downfaulted and til...
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| Format: | Article |
| Language: | English |
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Universidad Nacional Autónoma de México, Instituto de Geofísica
1998-06-01
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| Series: | Geofísica Internacional |
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| Online Access: | http://www.geofisica.unam.mx/unid_apoyo/editorial/publicaciones/investigacion/geofisica_internacional/anteriores/1998/04/campos.pdf |
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| author | J. O. Campos-Enríquez M.A. Alatorre-Zamora |
| author_facet | J. O. Campos-Enríquez M.A. Alatorre-Zamora |
| author_sort | J. O. Campos-Enríquez |
| collection | DOAJ |
| description | Gravity data is used to infer the shallow crustal structure of the Tepic graben adjacent to the City of Guadalajara. This depression does not constitute a symmetric graben with steep master faults but rather a complex transition zone. Blocks detached from the granitic sierras are downfaulted and tilted to the northeast along the front of these sierras. Farther to the north, the granitic basement deepens gradually. However, it steepens at the limit between the Sierra Madre Occidental and the Jalisco Block. Northwest of our study area, the limit is located north of the Plan de Barrancas fault. At the east the limit is located closer to the southward prolongation of the Plan de Barrancas fault. The change in position occurs near La Primavera caldera. The La Primavera caldera, Tequila volcano, and vents of cinder and lava cones are emplaced along NW-SE weakness zones in the batholith. The crust of the Sierra Madre Occidental adjacent to the limit features NE-SW lineaments perpendicular to those of the neighbouring Jalisco Block (JB). |
| first_indexed | 2024-03-12T10:13:42Z |
| format | Article |
| id | doaj.art-5a56e09c8342425bb42cab64ed5dbebb |
| institution | Directory Open Access Journal |
| issn | 0016-7169 |
| language | English |
| last_indexed | 2024-03-12T10:13:42Z |
| publishDate | 1998-06-01 |
| publisher | Universidad Nacional Autónoma de México, Instituto de Geofísica |
| record_format | Article |
| series | Geofísica Internacional |
| spelling | doaj.art-5a56e09c8342425bb42cab64ed5dbebb2023-09-02T10:38:59ZengUniversidad Nacional Autónoma de México, Instituto de GeofísicaGeofísica Internacional0016-71691998-06-01374263282Shallow crustal structure of the junction of the grabens of Chapala, Tepic-Zacoalco and Colima, MexicoJ. O. Campos-EnríquezM.A. Alatorre-ZamoraGravity data is used to infer the shallow crustal structure of the Tepic graben adjacent to the City of Guadalajara. This depression does not constitute a symmetric graben with steep master faults but rather a complex transition zone. Blocks detached from the granitic sierras are downfaulted and tilted to the northeast along the front of these sierras. Farther to the north, the granitic basement deepens gradually. However, it steepens at the limit between the Sierra Madre Occidental and the Jalisco Block. Northwest of our study area, the limit is located north of the Plan de Barrancas fault. At the east the limit is located closer to the southward prolongation of the Plan de Barrancas fault. The change in position occurs near La Primavera caldera. The La Primavera caldera, Tequila volcano, and vents of cinder and lava cones are emplaced along NW-SE weakness zones in the batholith. The crust of the Sierra Madre Occidental adjacent to the limit features NE-SW lineaments perpendicular to those of the neighbouring Jalisco Block (JB).http://www.geofisica.unam.mx/unid_apoyo/editorial/publicaciones/investigacion/geofisica_internacional/anteriores/1998/04/campos.pdfSierra Madre OccidentalJalisco Blocklimitshallow crustal structuretriple junction areaTepic graben |
| spellingShingle | J. O. Campos-Enríquez M.A. Alatorre-Zamora Shallow crustal structure of the junction of the grabens of Chapala, Tepic-Zacoalco and Colima, Mexico Geofísica Internacional Sierra Madre Occidental Jalisco Block limit shallow crustal structure triple junction area Tepic graben |
| title | Shallow crustal structure of the junction of the grabens of Chapala, Tepic-Zacoalco and Colima, Mexico |
| title_full | Shallow crustal structure of the junction of the grabens of Chapala, Tepic-Zacoalco and Colima, Mexico |
| title_fullStr | Shallow crustal structure of the junction of the grabens of Chapala, Tepic-Zacoalco and Colima, Mexico |
| title_full_unstemmed | Shallow crustal structure of the junction of the grabens of Chapala, Tepic-Zacoalco and Colima, Mexico |
| title_short | Shallow crustal structure of the junction of the grabens of Chapala, Tepic-Zacoalco and Colima, Mexico |
| title_sort | shallow crustal structure of the junction of the grabens of chapala tepic zacoalco and colima mexico |
| topic | Sierra Madre Occidental Jalisco Block limit shallow crustal structure triple junction area Tepic graben |
| url | http://www.geofisica.unam.mx/unid_apoyo/editorial/publicaciones/investigacion/geofisica_internacional/anteriores/1998/04/campos.pdf |
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