Geoquímica de elementos trazas en espeleotemas con laminación estacional de las cuevas de Ortigosa de Cameros (La Rioja)
[EN] The concentration of several trace elements (Mg, Ba, Sr,Al, Si and P) has been analyzed in two speleothems, corresponding to MIS-5 and MIS-1 according to U/Th dating, and one recent deposit, experimentally recorded.All them belong to La Paz cave in Ortigosa de Cameros (La Rioja). The analyzed t...
| Autores: | , , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2013 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/89759 |
| Acceso en línea: | http://hdl.handle.net/10261/89759 |
| Access Level: | acceso abierto |
| Palabra clave: | Speleothems Trace element geochemistry Seasonality MIS 5 and 1 Iberian Range Espeleotemas Geoquímica de elementos traza Estacionalidad Cordillera Ibérica |
| Sumario: | [EN] The concentration of several trace elements (Mg, Ba, Sr,Al, Si and P) has been analyzed in two speleothems, corresponding to MIS-5 and MIS-1 according to U/Th dating, and one recent deposit, experimentally recorded.All them belong to La Paz cave in Ortigosa de Cameros (La Rioja). The analyzed trace element content displays a seasonality that agrees with the speleothem lamination.Trace element concentration is higher in the dark laminae, formed during the fall-winter season. This content is linked to the flushing into the cave of organic matter from soil activity, in fall, when precipitation resumes. Mg/Ca and Sr/Ca evolutions point to a decrease of humidity during MIS-5 with respect to MIS-1, whereas at present aridity increases, probably in relation to an enlarging of the seasonal contrast. |
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