INVESTIGADORES
ZARATE marcelo Aristides
capítulos de libros
Título:
Neogene sedimentation in the Argentine foreland between 34 30 y 41 S and its relation to the Andes evolution
Autor/es:
ALICIA FOLGUERA; MARCELO ZÁRATE
Libro:
Cenozoic Geology of the Central Andes of Argentina
Editorial:
Instituto del cenozoico Universidad Nacional de Salta
Referencias:
Lugar: Salta; Año: 2011; p. 121 - 132
Resumen:
This contribution examines the Neogene record of central Argentina with focus on the central part of La Pampa province,
and offers a preliminary model of evolution in relation to the Andes tectonics. The sediments, characterized by their Andean
derived composition (volcaniclastic) and vast extension, are interpreted as distal synorogenic deposits accumulated between
around 12 and 7-6? Ma. On the basis of the geometry analysis of the late Miocene basin, it is inferred that sedimentation took
place in an Andean foreland back bulge affected by dynamic subsidence.
The central part of La Pampa Province, here defined as a block (La Pampa Central block) is considered to have been upliftedand basculated to the east with a few meters throw in response to the flat geometry subduction that occurred at this latitude in
the late Miocene. The uplift may have also caused the end of the accommodation space north of 38°S and brought about the
southward migration of the sediment depocenter during the Pliocene.
Keywords: Neogene - Pampa province - foreland basin: Neogene - Pampa province - foreland basin