Marcelo Limeres | Chevron Corporation (original) (raw)
Uploads
Papers by Marcelo Limeres
ABSTRACT The Precuyano Cycle (Late Triassic- Early Jurassic) in the Neuquén Basin.- The term Prec... more ABSTRACT
The Precuyano Cycle (Late Triassic- Early Jurassic) in the Neuquén Basin.- The term Precuyano was defined during the early 80s in
order to name a group of piroclastic, volcanic and epiclastic deposits that partly fill the initial stage of the Neuquén Basin. It
comprises several litoestratigraphic units formerly defined as Remoredo, Sañico and Piedra del Aguila formations, among others.
These deposits, mostly from continental bulk, appear in depocenters limited by extensional faults of mainly NW-SE strike. Their
development characterize the initial rift stage and the consequent formation of hemigraben structures. The regional study and
further analysis of these deposits of both subsurface and outcrops, enabled a better understanding of the tectonic evolution and the
Mesozoic sedimentation of the Neuquén Basin on the one hand, and the differenciation between these units and the ones in the
basement on the other. The complexity of the wildly accepted term Precuyano Cycle advices not to use the lithostratigraphy as the
only tool for the proper analysis of these deposits.
Key words: Precuyano, halfgraben, volcaniclastic deposits, rifting, orogenic collapse, tectosedimentation, Neuquén Basin
ABSTRACT The Precuyano Cycle (Late Triassic- Early Jurassic) in the Neuquén Basin.- The term Prec... more ABSTRACT
The Precuyano Cycle (Late Triassic- Early Jurassic) in the Neuquén Basin.- The term Precuyano was defined during the early 80s in
order to name a group of piroclastic, volcanic and epiclastic deposits that partly fill the initial stage of the Neuquén Basin. It
comprises several litoestratigraphic units formerly defined as Remoredo, Sañico and Piedra del Aguila formations, among others.
These deposits, mostly from continental bulk, appear in depocenters limited by extensional faults of mainly NW-SE strike. Their
development characterize the initial rift stage and the consequent formation of hemigraben structures. The regional study and
further analysis of these deposits of both subsurface and outcrops, enabled a better understanding of the tectonic evolution and the
Mesozoic sedimentation of the Neuquén Basin on the one hand, and the differenciation between these units and the ones in the
basement on the other. The complexity of the wildly accepted term Precuyano Cycle advices not to use the lithostratigraphy as the
only tool for the proper analysis of these deposits.
Key words: Precuyano, halfgraben, volcaniclastic deposits, rifting, orogenic collapse, tectosedimentation, Neuquén Basin