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
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 sect...
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todo:paper_01491423_v100_n5_p743_Kietzmann2023-10-03T15:01:04Z 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, D.A. Ambrosio, A.L. Suriano, J. Alonso, M.S. Tomassini, F.G. Depine, G. Repol, D. Biogeochemistry Biological materials Carbon Coastal zones Deposition Organic compounds Organic minerals Petroleum geology Sea level Shale Shale oil Stratigraphy Tectonics Carbonate ramp system Depositional sequences Highstand systems tract Organic matter content Relative sea-level changes Transgressive systems tracts Unconventional reservoirs X-ray diffraction studies Organic carbon bitumen carbonate ramp clay mineral cyclic sedimentation depositional sequence facies analysis folding oil shale organic matter sea level change thrust fault Argentina Neuquen Basin 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. Copyright © 2016. The American Association of Petroleum Geologists. All rights reserved. Fil:Kietzmann, D.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Suriano, J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Depine, G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_01491423_v100_n5_p743_Kietzmann |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Biogeochemistry Biological materials Carbon Coastal zones Deposition Organic compounds Organic minerals Petroleum geology Sea level Shale Shale oil Stratigraphy Tectonics Carbonate ramp system Depositional sequences Highstand systems tract Organic matter content Relative sea-level changes Transgressive systems tracts Unconventional reservoirs X-ray diffraction studies Organic carbon bitumen carbonate ramp clay mineral cyclic sedimentation depositional sequence facies analysis folding oil shale organic matter sea level change thrust fault Argentina Neuquen Basin |
| spellingShingle |
Biogeochemistry Biological materials Carbon Coastal zones Deposition Organic compounds Organic minerals Petroleum geology Sea level Shale Shale oil Stratigraphy Tectonics Carbonate ramp system Depositional sequences Highstand systems tract Organic matter content Relative sea-level changes Transgressive systems tracts Unconventional reservoirs X-ray diffraction studies Organic carbon bitumen carbonate ramp clay mineral cyclic sedimentation depositional sequence facies analysis folding oil shale organic matter sea level change thrust fault Argentina Neuquen Basin Kietzmann, D.A. Ambrosio, A.L. Suriano, J. Alonso, M.S. Tomassini, F.G. Depine, G. Repol, D. 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 |
| topic_facet |
Biogeochemistry Biological materials Carbon Coastal zones Deposition Organic compounds Organic minerals Petroleum geology Sea level Shale Shale oil Stratigraphy Tectonics Carbonate ramp system Depositional sequences Highstand systems tract Organic matter content Relative sea-level changes Transgressive systems tracts Unconventional reservoirs X-ray diffraction studies Organic carbon bitumen carbonate ramp clay mineral cyclic sedimentation depositional sequence facies analysis folding oil shale organic matter sea level change thrust fault Argentina Neuquen Basin |
| description |
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. Copyright © 2016. The American Association of Petroleum Geologists. All rights reserved. |
| format |
JOUR |
| author |
Kietzmann, D.A. Ambrosio, A.L. Suriano, J. Alonso, M.S. Tomassini, F.G. Depine, G. Repol, D. |
| author_facet |
Kietzmann, D.A. Ambrosio, A.L. Suriano, J. Alonso, M.S. Tomassini, F.G. Depine, G. Repol, D. |
| author_sort |
Kietzmann, D.A. |
| title |
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 |
| title_short |
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 |
| title_full |
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 |
| title_fullStr |
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 |
| title_full_unstemmed |
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 |
| title_sort |
vaca muerta-quintuco system (tithonian-valanginian) in the neuquén basin, argentina: a view from the outcrops in the chos malal fold and thrust belt |
| url |
http://hdl.handle.net/20.500.12110/paper_01491423_v100_n5_p743_Kietzmann |
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