| dc.contributor | Springer | |
| dc.creator | Dávila Harris, Pablo | |
| dc.creator | Carrasco Núñez, Gerardo | |
| dc.date | 2018-03-22T23:17:32Z | |
| dc.date | 2018-03-22T23:17:32Z | |
| dc.date | 2013-06 | |
| dc.date.accessioned | 2023-07-17T22:04:47Z | |
| dc.date.available | 2023-07-17T22:04:47Z | |
| dc.identifier | Dávila-Harris, P., Ellis, B.S., Branney, M.J. et al. Bull Volcanol (2013) 75: 722. https://doi.org/10.1007/s00445-013-0722-5 | |
| dc.identifier | http://hdl.handle.net/11627/3557 | |
| dc.identifier | https://doi.org/10.1007/s00445-013-0722-5 | |
| dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/7544101 | |
| dc.description | "The 1.5-Ma Adeje Formation in SW Tenerife contains an ignimbrite sheet with remarkable textural and chemical complexity. A basal Plinian pumice-fall layer is overlain by a partly welded compound ignimbrite in which phonolitic pumice lapilli and dense obsidian spatter rags with irregular, fluidal-shaped margins are supported in a poorly sorted tuff matrix. The lower ignimbrite flow-unit contains accretionary lapilli in its upper part, overlain by an ash-pellet-bearing fallout layer from a co-ignimbrite plume. The upper ignimbrite flow-unit comprises a locally welded massive lapilli-tuff that grades up into lithic breccia containing juvenile obsidian blocks and both cognate and vent-derived lithic blocks. Geochemically, the Adeje Formation shows two distinct juvenile populations that relate to crystal-poor and crystal-rich magma types. Crystal-rich juvenile clasts contain multiple compositions of ilmenite and magnetite, and crystal aggregates of bytownite (An79-86). The varied assemblage of juvenile clasts reflects an eruptive style that may have involved rapid changes in magma chamber pressure associated with caldera collapse, and possibly the disruption of a lava lake. The Adeje eruption started with a Plinian explosive phase that rained ash and pumice lapilli across SW Tenerife; followed by pyroclastic fountaining feeding density currents with explosive ejecta of juvenile glassy material producing the coarse, spatter-bearing ignimbrite facies. A short pause between pyroclastic density currents is recorded by the co-ignimbrite ash and pellet-fall bed. The climactic phase of the eruption probably involved caldera subsidence as recorded by a widespread massive heterolithic breccia." | |
| dc.format | application/pdf | |
| dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internacional | |
| dc.rights | http://creativecommons.org/licenses/by-nc-nd/4.0/ | |
| dc.rights | Acceso Abierto | |
| dc.subject | Tenerife | |
| dc.subject | Explosive eruptions | |
| dc.subject | Pyroclastic density current | |
| dc.subject | Phonolite | |
| dc.subject | Spatter | |
| dc.subject | Ignimbrite | |
| dc.subject | GEOLOGÍA | |
| dc.title | Lithostratigraphic analysis and geochemistry of a vitric spatter-bearing ignimbrite: the Quaternary Adeje Formation, Cañadas volcano, Tenerife | |
| dc.type | article | |
