Radiometric dating and geochemistry of a tuff horizon from a mammal-bearing lacustrine sequence, Miocene Bicorp Basin, eastern Spain
The basin-fill sequence from the Bicorp Basin (Eastern Spain) comprises a lower alluvial unit and an upper lacustrine unit. The lower part of the lacustrine sequence includes a tuff bed, interbedded between two marnmal-bearing horizons which have yielded fossil rodents characteristic of the MN 10 st...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 1995 |
| País: | España |
| Institución: | Universidad Complutense de Madrid (UCM) |
| Repositorio: | Docta Complutense |
| Idioma: | inglés |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/59466 |
| Acceso en línea: | https://hdl.handle.net/20.500.14352/59466 |
| Access Level: | acceso abierto |
| Palabra clave: | 550.93 551.782.1(460) (460)551.782.1 K-Ar dating Tuff Lacustrine deposits Miocene volcanism Eastern Spain Datación K-Ar Cinerita Depósitos lacustres Volcanismo mioceno Levante español Geoquímica 2503 Geoquímica |
| Sumario: | The basin-fill sequence from the Bicorp Basin (Eastern Spain) comprises a lower alluvial unit and an upper lacustrine unit. The lower part of the lacustrine sequence includes a tuff bed, interbedded between two marnmal-bearing horizons which have yielded fossil rodents characteristic of the MN 10 standard mammal unit (Late Vallesian, Late Miocene). K-Ar age determinations on the tuff have provided a radiometric age averaging 9.6 ± 0.2 Ma (weighted average of two samples) for this ash fall deposito Major, trace and RE element analyses indicate that this tuff originated from a calc-alkaline evento The geochemical features of the Bicorp tuff, when compared with those from other calk-alkaline rocks from the Western Mediterranean, are not completely coincident. The stratigraphic correlation between the fossil mammal sites and the radiometrically-dated tuff allows a more precise calibration between the Late Miocene biochronological and geochronometric scales |
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