48139 20170504091404.0 doi 10.3989/egeol.41730.319 sideral 89160 ART-2014-89160 eng (orcid)0000-0002-5246-366X Osácar, M.C. Universidad de Zaragoza Tracking the oxygen isotopic signature from the rainfall to the speleothems in Ortigosa de Cameros caves (La Rioja, Spain) 2014 Access copy available to the general public Unrestricted A one-year monitoring survey has been carried out in La Paz and La Vin~a Caves in the Ortigosa de Cameros Cave System (NE Iberian Peninsula), in order to track the oxygen isotope signal from rainfall to speleothem calcite, assessing the ability of this signal to retain environmental information. Oxygen isotope signals of rainfall events, drip water —sampled every three months—, and speleothem calcite, precipitated over three-months, are com- pared. Water dripping follows precipitation events in winter, spring and summer, more closely in the near-surface drip points than in the deeper ones. In autumn, dripping is delayed with respect to rainfall, suggesting that water stays in the epikarst before dripping resumes after summer. This delay causes a deviation of the total drip water sig- nal (average d18O=-8.39‰ V-SMOW) from the rainfall signal (average d18O=-7.41‰ V-SMOW). On the contrary, in winter the isotopic signal of drip water keeps the rainfall signal. Calcite isotopic signal (total average d18O=-6.83‰ V-PDB) shows a small offset (0.62–0.75%) with respect to the signal predicted by drip water oxygen composition; this points to a limited kinetic effect in calcite precipitation, therefore calcite retains the signal of rainfall, especially in winter. info:eu-repo/grantAgreement/ES/MINECO/CGL2009-10455-BTE info:eu-repo/semantics/openAccess by-nc http://creativecommons.org/licenses/by-nc/3.0/es/ 0.457 2014 GEOLOGY 39 / 46 = 0.848 2014 Q4 T3 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion (orcid)0000-0002-1304-2264 Sancho, C. Universidad de Zaragoza (orcid)0000-0001-5700-6495 Muñoz, A. Universidad de Zaragoza Bartolomé, M. Moreno, A. Delgado-Huertas, A. Cacho, I. 2000 427 Universidad de Zaragoza Departamento de Ciencias de la Tierra Geodinámica Externa 2000 280 Universidad de Zaragoza Departamento de Ciencias de la Tierra Estratigrafía 2000 120 Universidad de Zaragoza Departamento de Ciencias de la Tierra Cristalografía y Mineralogía 70, 2 (2014), e02 [10 pp.] Estud. Geol. ESTUDIOS GEOLOGICOS-MADRID 0367-0449 5571481 http://zaguan.unizar.es/record/48139/files/texto_completo.pdf Versión publicada 85015 http://zaguan.unizar.es/record/48139/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:48139 articulos driver 2017-05-04-09:11:43 ARTICLE