INVESTIGADORES
NOBILE Julieta Carolina
congresos y reuniones científicas
Título:
Uplift history of the northern Sierras Pampeanas broken foreland using river profile modelling
Autor/es:
JULIETA C. NÓBILE; FEDERICO M. DÁVILA
Lugar:
Antofagasta
Reunión:
Congreso; XIII CONGRESO GEOLOGICO CHILENO; 2012
Institución organizadora:
Universidad Católica del Norte
Resumen:
Different geological and
geophysical approaches have suggested that the Argentine broken foreland (Sierras
Pampeanas) uplifted after ~5 Ma, with higher amounts to the north respect to
the south. But the information comes from a poorly constrained stratigraphy. The
lack of dated marker beds and low-temperature thermochronology has supplied no conclusive
results. In this contribution we use a longitudinal river profile analysis to give
insight into the uplift history of the N Sierras Pampeanas (Aconquija-Ambato
ranges). The method is based on an inverse algorithm that relates river profiles
with uplift rates. Our results show two main uplift peaks that would have
occurred <20-15 Ma, which matches with geological data.