A general model for tectonic control of magmatism: Examples from Long Valley Caldera (USA) and El Chichón (México)
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| Format: | Artículo científico |
| Langue: | en |
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Universidad Nacional Autónoma de México
2009
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| _version_ | 1876471532534890496 |
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| author | M. Bursik |
| author_facet | M. Bursik |
| contents | A general model for tectonic control of magmatism: Examples from Long Valley Caldera (USA) and El Chichón (México) M. Bursik Ciencias de la Tierra Mono dike Mexico El Chichón California The relationship of volcanoes to regional tectonic setting and earthquake dynamics is intimate. We know that eruptions are often triggered by earthquakes, and that volcanoes generally lie along or near major faults or within faulted provinces. It has been generally found that bimodal basaltic-rhyolitic volcanism is associated with extensional settings, presumably because of the creation of accommodating space. For intermediate arc volcanoes, tectonic settings are generally compressional or transpressional. The spatial pattern of faulting indicates that Long Valley was focussed by a releasing bend in the transtensional, Sierran range-front fault system. The temporal pattern of offset rates suggests that the zone of greatest activity has migrated to the NW through time, and is now focussed at the Mono-Inyo Craters. The southern Mexican volcanic arc presents an example of the coexistence of regional compressional and transpressional structures with volcanoes. On an event basis, slip on regional structures creates opportunities for magma movement and eruption, in a type of dynamic fault pumping of fluids. Both kinematically and dynamically, volcanic activity may be completely dependent on tectonic factors for accumulation, storage and eruption of magma. 2009 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56813222012 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.1 Vol.48 |
| format | Artículo científico |
| id | redalyc_56813222012 |
| institution | Redalyc |
| language | en |
| publishDate | 2009 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | A general model for tectonic control of magmatism: Examples from Long Valley Caldera (USA) and El Chichón (México) M. Bursik Ciencias de la Tierra Mono dike Mexico El Chichón California A general model for tectonic control of magmatism: Examples from Long Valley Caldera (USA) and El Chichón (México) M. Bursik Ciencias de la Tierra Mono dike Mexico El Chichón California The relationship of volcanoes to regional tectonic setting and earthquake dynamics is intimate. We know that eruptions are often triggered by earthquakes, and that volcanoes generally lie along or near major faults or within faulted provinces. It has been generally found that bimodal basaltic-rhyolitic volcanism is associated with extensional settings, presumably because of the creation of accommodating space. For intermediate arc volcanoes, tectonic settings are generally compressional or transpressional. The spatial pattern of faulting indicates that Long Valley was focussed by a releasing bend in the transtensional, Sierran range-front fault system. The temporal pattern of offset rates suggests that the zone of greatest activity has migrated to the NW through time, and is now focussed at the Mono-Inyo Craters. The southern Mexican volcanic arc presents an example of the coexistence of regional compressional and transpressional structures with volcanoes. On an event basis, slip on regional structures creates opportunities for magma movement and eruption, in a type of dynamic fault pumping of fluids. Both kinematically and dynamically, volcanic activity may be completely dependent on tectonic factors for accumulation, storage and eruption of magma. 2009 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56813222012 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.1 Vol.48 |
| title | A general model for tectonic control of magmatism: Examples from Long Valley Caldera (USA) and El Chichón (México) |
| topic | Ciencias de la Tierra Mono dike Mexico El Chichón California |
| url | https://www.redalyc.org/articulo.oa?id=56813222012 |