MACNBR   00242
MUSEO ARGENTINO DE CIENCIAS NATURALES "BERNARDINO RIVADAVIA"
Unidad Ejecutora - UE
artículos
Título:
Fluvial-Derived Turbidites in the Los Molles Formation (Jurassic of the Neuque´n Basin): Initiation, Transport, and Deposition
Autor/es:
PAIM, PAULO; LAVINA, ERNESTO; FACCINI, UBIRATAN; DA SILVEIRA, A.S.; LEANZA HÉCTOR A.; DAVILA, R.S.
Revista:
AAPG Studies in Geology
Editorial:
AMER ASSOC PETROLEUM GEOLOGIST
Referencias:
Año: 2010 vol. 61 p. 1 - 1
ISSN:
0271-8510
Resumen:
this chapter is about an almost uninterrupted exposure of the Jurassic Los Molles Formation in theArroyo La Jardinera region in the southernNeuquen Basin (western Argentina). It is based on the analysis of high-resolution satellite images linked with extensive field data. Its main goal is to present a conceptual model for the studied turbidite systemcapable of explaining how sand and gravel were brought onto and removed from the shelf margin and how these coarse-grained sediments were transported along and deposited on the slope and basin plain. The facies tract ascribed to this turbidite system represents high- frequency lowstand system tracts. From proximal to distal, it includes the record of fluvial channels incised into mid- to outer-shelf deposits, turbidite channels scoured on slope strata, turbidite lobes resting on slope rise facies, and poorly developed turbidite lobe fringes enclosed within basin plain strata. These gravity flow strata were assigned to short-lived (surges) moderately efficient turbidity currents derived from the almost continuous failure of delta-front deposits (sand and gravel) during ordinary fluvial floods.