INVESTIGADORES
DAVILA Federico Miguel
artículos
Título:
Influence of fluid flows on low-temperature thermochronology: an example from the Podhale Basin, Western Inner Carpathians
Autor/es:
SANCHEZ NASSIF FRANCISCO; DÁVILA, FEDERICO M.; CASTELLUCIO ADA2, COLLO GILDA1, MORA ANDRES3.
Revista:
GEOLOGICA CARPATHICA
Editorial:
SLOVAK ACADEMIC PRESS LTD
Referencias:
Año: 2022
ISSN:
1335-0552
Resumen:
: A novel approach that couples hydrological and thermochronological modelling is tested in a well-knownhydrothermal system, the Inner Western Carpathians, providing insights of the yet-unexplained Apatite Fission Track(AFT) ages of the Podhale Basin. Our new model improves previous ones by incorporating the effects of fluid circulation,by considering compaction, smectite dehydration and meteoric water as sources of fluid. Rock properties such as thermaldiffusivity, porosity and permeability, are dependent on lithology and the effective-stress state of the system, making ourcalculations depart from previous efforts on thermochronological modelling. Particularly, we examined young (around12 Ma) apatite fission track ages from Oligocene strata of the Podhale wild flysch, which suggest the occurrence of eithersubstantial burial or an elevated basal thermal paleogradient, even though none of the above have been documented inthe area. Such problem is addressed on this contribution, since by reproducing previous numerical experiments butadding groundwater circulation this time, improved thermally-reset AFT ages of the Podhale Basin are obtained. Thermal,hydrological and mineralogical observations are successfully reproduced, putting forward the calibration and validity ofthe model here proposed. Furthermore, our findings not only unveil the linking between the hydrological and thermalphenomena present in the study region, but also, trigger new questions on the processes that should be taken into accountwhen thermochronological calculations are concerned.