Resumen de Estacionalidad de la laminación espeleotémica de las Cuevas de Oetigosa de Cameros (La Rioja): aproximación expermental
Arsenio Muñoz Jiménez, María Cinta Osácar Soriano, Carlos Sancho Marcén
Monitoring of both carbonate precipitation process and environmental parameters inside two caves in Ortigosa de Cameros (La Rioja, Spain) has allowed us to establish the seasonality of speletohem lamination in these caves. Temperature record shows a minimum in March-June and a maximum in August with little oscillation (< 1oC). Drip water flow is maximum in autumn and spring. The carbonate record displays white porous laminae (WPL) and dark compact laminae (DCL) of seasonal origin. DCL are organic matter rich and form in high drip water flow periods, when soil organic matter is flushed into the caves. Stable isotope analyses of drip water (�Â18O and �ÂD) and carbonate (�Â18O and �Â13C) confirm the seasonal pattern: �Â13C minimus correspond to the warm seasons (WPL) while �Â18O pattern can be explained on the basis of the corresponding drip water �Â18O variations.
