U-PB geochronology and magnetostratigraphy of a north Patagonian syn-orogenic Miocene succession: Tectono-stratigraphic implications for the foreland system configuration

BUCHER, JOAQUÍN; GARCÍA, MICAELA; NAIPAUER, MAXIMILIANO; RAPALINI, AUGUSTO E.; HAUSER, NATALIA; MILANESE, FLORENCIA N.; D'ELIA, LEANDRO; SATO, ANA MARÍA; VALENCIA, VÍCTOR A.; CRUZ VIEIRA, LUCIETH; LÓPEZ, MANUEL; BILMES, ANDRES; FUNES, DANIELA; VENTURA SANTOS, ROBERTO; FRANZESE, JUAN

TECTONOPHYSICS

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2019 vol. 766 p. 81 - 93

0040-1951

The syn-orogenic Miocene deposits of the Patagonian Foreland System were the focus of numerous works in the latest years, due to their central role in the comprehension of the tectono-stratigraphy and tectonic evolution related to the Patagonian Andean growth. In this work we present a chronostratigraphic scheme based on magnetostratigraphy and U[sbnd]Pb geochronology for one of the syn-orogenic successions of the Patagonian Foreland System: the Paso del Sapo Basin. The sequence is constrained to an age of >14.9 to 14.9?14.6 Ma for the basal alluvial systems of La Pava Formation, with mean sedimentation rates of 4.2 cm/kyr; of 14.6 to 12.8?12.7 Ma for the lacustrine - deltaic environments of the lower Collón Cura Formation, with sedimentation rates ranging from 1.6 to 26.0 cm/kyr; and of 12.8?12.7 to 14.9 to