Basement and cover architecture in the Central Pyrenees constrained by gravity data

Abstract A new gravity survey (1164 stations and 180 samples for density analysis) combined with two geological cross sections has been carried out in a sector of the Central Pyrenees order to improve characterization basement cover architecture. From North South, study area comprises southern half Axial Zone northernmost part South-Pyrenean Zone. New data were previous existing databases obtain Bouguer residual anomaly maps area. The sections, oriented NNE–SSW, built from field surficial subsurface La Maladeta plutonic complex. map shows values ranging ?18 16 mGal anomalies mainly N120E. 2.5D modelled show similar observed curves coinciding interpreted structural Data high N120E Orri thrust sheet an important depression, same orientation, leading edge at depth Rialp as linked large accumulation Triassic evaporites. volume Arties granites constrained through modelling. This work highlights that combination geology modelling can help determine architecture orogen localize accumulations evaporites depth.