Compositional variations and magma mixing in the 1991 eruptions of Hudson volcano, Chile (Registro nro. 236387)
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| fixed length control field | 03130nam a2200313Ia 4500 |
| 001 - NÚMERO DE CONTROL | |
| control field | 24052 |
| 041 ## - CÓDIGO DE IDIOMA | |
| Código de idioma para texto/pista de sonido o título separado | Inglés |
| 008 - ELEMENTOS DE LONGITUD FIJA -- INFORMACIÓN GENERAL | |
| fixed length control field | 220218s9999 xx 000 0 und d |
| 100 ## - ASIENTO PRINCIPAL--NOMBRE PERSONAL | |
| Nombre personal | Kratzmann, David J. |
| 9 (RLIN) | 19439 |
| 245 #0 - MENCIÓN DE TITULO | |
| Título | Compositional variations and magma mixing in the 1991 eruptions of Hudson volcano, Chile |
| 260 ## - PUBLICACIÓN, DISTRIBUCIÓN, ETC. (PIE DE IMPRENTA) | |
| Fecha de publicación, distribución, etc. | 2009 |
| 300 ## - DESCRIPCIÓN FÍSICA | |
| Extensión | pp. 419-439 |
| 500 ## - NOTA GENERAL | |
| Nota general | DOI: https://doi.org/10.1007/s00445-008-0234-x |
| 520 ## - NOTA DE RESUMEN, ETC. | |
| Nota de sumario, etc. | The August 1991 eruptions of Hudson volcano produced ~2.7 km3 (dense rock equivalent, DRE) of basaltic to trachyandesitic pyroclastic deposits, making it one of the largest historical eruptions in South America. Phase 1 of the eruption (P1, April 8) involved both lava flows and a phreatomagmatic eruption from a fissure located in the NW corner of the caldera. The paroxysmal phase (P2) began several days later (April 12) with a Plinian-style eruption from a different vent 4 km to the south-southeast. Tephra from the 1991 eruption ranges in composition from basalt (phase 1) to trachyandesite (phase 2), with a distinct gap between the two erupted phases from 54-60 wt% SiO2. A trend of decreasing SiO2 is evident from the earliest part of the phase 2 eruption (unit A, 63-65 wt% SiO2) to the end (unit D, 60-63 wt% SiO2). Melt inclusion data and textures suggest that mixing occurred in magmas from both eruptive phases. The basaltic and trachyandesitic magmas can be genetically related through both magma mixing and fractional crystallization processes. A combination of observed phase assemblages, inferred water content, crystallinity, and geothermometry estimates suggest pre-eruptive storage of the phase 2 trachyandesite at pressures between ~50-100 megapascal (MPa) at 972?±?26°C under water-saturated conditions (log fO2 -10.33 (±0.2)). It is proposed that rising P1 basaltic magma intersected the lower part of the P2 magma storage region between 2 and 3 km depth. Subsequent mixing between the two magmas preferentially hybridized the lower part of the chamber. Basaltic magma continued advancing towards the surface as a dyke to eventually be erupted in the northwestern part of the Hudson caldera. The presence of tachylite in the P1 products suggests that some of the magma was stalled close to the surface (<0.5 km) prior to eruption. Seismicity related to magma movement and the P1 eruption, combined with chamber overpressure associated with basalt injection, may have created a pathway to the surface for the trachyandesite magma and subsequent P2 eruption at a different vent 4 km to the south-southeast. |
| 650 ## - ASIENTO SECUNDARIO DE MATERIA - TERMINO TEMÁTICO | |
| Término temático o nombre geográfico como elemento de entrada | VOLCANISMO |
| 9 (RLIN) | 66746 |
| 650 ## - ASIENTO SECUNDARIO DE MATERIA - TERMINO TEMÁTICO | |
| Término temático o nombre geográfico como elemento de entrada | MAGMATISMO |
| 9 (RLIN) | 54644 |
| 650 ## - ASIENTO SECUNDARIO DE MATERIA - TERMINO TEMÁTICO | |
| Término temático o nombre geográfico como elemento de entrada | ERUPCIONES VOLCANICAS |
| 9 (RLIN) | 47558 |
| 650 ## - ASIENTO SECUNDARIO DE MATERIA - TERMINO TEMÁTICO | |
| Término temático o nombre geográfico como elemento de entrada | VOLCAN HUDSON |
| 9 (RLIN) | 66473 |
| 650 ## - ASIENTO SECUNDARIO DE MATERIA - TERMINO TEMÁTICO | |
| Término temático o nombre geográfico como elemento de entrada | CHILE |
| 9 (RLIN) | 5 |
| 650 ## - ASIENTO SECUNDARIO DE MATERIA - TERMINO TEMÁTICO | |
| Término temático o nombre geográfico como elemento de entrada | REGION 11 |
| 9 (RLIN) | 60615 |
| 700 ## - ASIENTO SECUNDARIO - NOMBRE PERSONAL | |
| Nombre personal | Carey, Steven |
| 9 (RLIN) | 7831 |
| 700 ## - ASIENTO SECUNDARIO - NOMBRE PERSONAL | |
| Nombre personal | Scasso, Roberto |
| 9 (RLIN) | 32589 |
| 700 ## - ASIENTO SECUNDARIO - NOMBRE PERSONAL | |
| Nombre personal | Naranjo S., José Antonio |
| 9 (RLIN) | 25356 |
| 773 ## - ASIENTO DE ITEM FUENTE | |
| Título de la Revista | Bulletin of Volcanology, v.71:n.4 |
| 856 ## - LOCALIZACION Y ACCESO ELECTRONICOS | |
| Identificador Uniforme del Recurso (“URL”) | <a href="link.springer.com/article/10.1007/s00445-008-0234-x">link.springer.com/article/10.1007/s00445-008-0234-x</a> |
| Texto del enlace | Url Archivo |
| 942 ## - TIPO DE MATERIAL (KOHA) | |
| Tipo de Material | Artículos de Revistas |
| Suppress in OPAC | 0 |
| 991 ## - TIPO DE DOCUMENTO | |
| TipoDocumento | Analíticas |
| Estado de retiro | Colección | Ubicación permanente | Ubicación actual | Fecha de ingreso | Total Checkouts | Date last seen | Tipo de material |
|---|---|---|---|---|---|---|---|
| Colección Analíticas | SERVICIO NACIONAL DE GEOLOGÍA Y MINERÍA (SERNAGEOMIN) | SERVICIO NACIONAL DE GEOLOGÍA Y MINERÍA (SERNAGEOMIN) | 08/03/2022 | 08/03/2022 | Artículos de Revistas |
