IDEAN   23403
INSTITUTO DE ESTUDIOS ANDINOS "DON PABLO GROEBER"
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Palinología y geoquímica de la Formación Casa de Piedra, Triásico de la Subcuenca de Rincón Blanco, provincia de San Juan.
Autor/es:
MACINO, J., , LARRIESTRA, F., ERRA, G. & OTTONE, E.G.
Lugar:
Tucumán
Reunión:
Congreso; XX Congreso Geológico Argentino; 2017
Institución organizadora:
UNT
Resumen:
The Casa de PiedraFormation (Ladinian/ Carnian) was deposited in a fluvio-deltaic to lacustrineenvironments. Chemical analysis of kerogen reveals high values of total organiccarbon. The basal two-thirds of the studied section are dominated by generallylow fluorescent amorphous kerogen, and high percentages of yellow fluorescent Botryococcus colonies (kerogen type Iand II); the organic matter displays a relatively high HC/HO index and moderatetotal hydrocarbons in several horizons constituting a potential source rock. Inthe upper third of the unit dominates low fluorescent, mostly opaque, kerogen,  with subordinate wood phytoclasts andmiospores (kerogen type III); HC/HO and total hydrocarbons values are low, thusthe generation potential of these horizons is reduced. The increase of the K/Rb ratio towards the top of the section, suggests terrigenous origin of thekerogen for these horizons.