IGEBA   23946
INSTITUTO DE GEOCIENCIAS BASICAS, APLICADAS Y AMBIENTALES DE BUENOS AIRES
Unidad Ejecutora - UE
artículos
Título:
Stratigraphic Context: Cyclostratigraphy, Magnetostratigraphy, and Seismic Stratigraphy
Autor/es:
IGLESIA LLANOS, M.P.; KIETZMANN, D.A.; LEANZA, H.A.; KOHAN MARTÍNEZ, M.
Revista:
AAPG MEMOIR
Editorial:
The American Association of Petroleum Geologists
Referencias:
Lugar: Tulsa; Año: 2020 vol. 121 p. 39 - 60
ISSN:
0271-8529
Resumen:
The Vaca Muerta Formation deposited in a retro-arc setting, favored by an under filled depocenterand uplifted peripheral zones. The onset of the deposition corresponds to a rapidflooding of oceanic water penetrated through sudden ruptures along the incipient Andeanarc, as a consequence of the Late Jurassic extension during the thermal subsidence stage.The Vaca Muerta Formation forms part of the Lower Mendoza Subgroup, and is defined asthe organic-rich calcareous mudstone (av. 5% TOC) deposited above the sharp contact ofthe continental Tordillo and the Quebrada del Sapo formations; the upper contact with theQuintuco Formation is gradational and diachronous. The Vaca Muerta Formation spansthe early Tithonian Virgatosphinctes andesensis to the early Valanginian Lissonia riveroi ammoniteZones. In association with classical stratigraphic characteristics of this unit, thischapter presents a cyclostratigraphic and magnetostratigraphic study displaying an unprecedentedaccurate time scale for the Vaca Muerta deposition, which took place fromChron M22 to Chron M15 in a timespan of ~10 My (4.86 My within the Tithonian and 5.27My within the Berriasian).