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Artículo

The Vaca Muerta-Quintuco system (Tithonian-Valanginian) in the Neuquén Basin, Argentina: A view from the outcrops in the Chos Malal fold and thrust belt

Kietzmann, Diego AlejandroIcon ; Ambrosio, Alfredo L.; Suriano, JulietaIcon ; Alonso, Maria SusanaIcon ; González Tomassini, Federico; Depine, Gabriela; Repol, David
Fecha de publicación: 05/2016
Editorial: American Association of Petroleum Geologists
Revista: AAPG Bulletin
ISSN: 0149-1423
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Meteorología y Ciencias Atmosféricas

Resumen

The Vaca Muerta-Quintuco system (uppermost lower Tithonian-lower Valanginian) is a thick shallowing-upward sedimentary cycle consisting of dark bituminous shales, marlstones, limestones, and sandstones, cropping out in the Neuquén Basin, west-central Argentina. This paper analyzes three outcrop sections in Chos Malal area, northem Neuquén province. Detailed facies analysis allows us to differentiate six facies associations, representing basinal to proximal outer ramp facies of a homoclinal carbonate ramp system (Vaca Muerta Formation) and basinal to shoreface facies of a mixed carbonate-siliciclastic shelf system (Quintuco Formation), prograding westward from the eastern margin of the basin. Two sequence hierarchies were recognized: 5 composite depositional sequences (third order) and 15 high-frequency sequences (fourth order). Fluctuations in organic matter content within the Vaca Muerta Formation suggest a relationship with depositional sequences, finding the highest values associated with transgressive systems tract, whereas the transition to the Quintuco Formation shows a strong decrease in total organic carbon. The xray diffraction studies showan increase of clayminerals and quartz in the transgressive systems tract of the Vaca Muerta Formation and an increase in the content of calcite in highstand systems tracts. This pattern is reversed in the Quintuco Formation. Our sequence stratigraphic approach contributes to the understanding of the relationship between organic matter, clay minerals, facies, stacking pattern, and relative sea level changes in this exceptional shale oil and shale gas unconventional reservoir. This study may be helpful for a better postulate of petrophysical and geomechanical models for unconventional exploration.
Palabras clave: .Mixed Carbonate/-Siliciclastic System , Source Rock , Shale-Gas Systems , Depositional Sequences , Jurassic ? Cretaceous Boundary
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/60264
DOI: https://dx.doi.org/10.1306/02101615121
URL: http://archives.datapages.com/data/bulletns/2016/05may/BLTN15121/bltn15121.html?
Colecciones
Articulos(IDEAN)
Articulos de INSTITUTO DE ESTUDIOS ANDINOS "DON PABLO GROEBER"
Articulos(IGEBA)
Articulos de INSTITUTO DE GEOCIENCIAS BASICAS, APLICADAS Y AMBIENTALES DE BS. AS
Citación
Kietzmann, Diego Alejandro; Ambrosio, Alfredo L.; Suriano, Julieta; Alonso, Maria Susana; González Tomassini, Federico; et al.; The Vaca Muerta-Quintuco system (Tithonian-Valanginian) in the Neuquén Basin, Argentina: A view from the outcrops in the Chos Malal fold and thrust belt; American Association of Petroleum Geologists; AAPG Bulletin; 100; 5; 5-2016; 743-771
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