Triassic-Jurassic development and evolution of the Atuel depocentre, Neuquén basin, Mendoza province
The Atuel depocentre corresponds to a Late Triassic - Early Jurassic NNW-trending subbasin, located in the northern sector of the Neuquén basin. Based on pre-existing stratigraphical data and present structural analysis we propose that the Atuel depocentre is bounded by the presence of two NNW-trend...
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todo:paper_00044822_v63_n4_p520_Giambiagi2023-10-03T13:58:24Z Triassic-Jurassic development and evolution of the Atuel depocentre, Neuquén basin, Mendoza province Giambiagi, L. Bechis, F. Lanés, S. Tunik, M. García, V. Suriano, J. Mescua, J. Extension Main Cordillera Neuquén Basin Rift Triassic-Jurassic depocenter displacement extensional tectonics fault zone formation mechanism graben Jurassic rifting structural geology tectonic evolution tectonic setting trend analysis Triassic Argentina Mendoza Neuquen Basin South America The Atuel depocentre corresponds to a Late Triassic - Early Jurassic NNW-trending subbasin, located in the northern sector of the Neuquén basin. Based on pre-existing stratigraphical data and present structural analysis we propose that the Atuel depocentre is bounded by the presence of two NNW-trending major normal faults, named Alumbre and La Manga. These faults are inferred to have controlled the development of two west-facing half-grabens: the Río Blanco, a completely emerged half-graben, and the western Arroyo Malo, a completely submerged half-graben. The structural model presented here is based on the assumption that both, the basement structural grain and the regional extension direction, exerted a first-order control in the development and evolution of the Atuel depocentre. During the early stage of rifting (pre-Rhaetian - Middle Hettangian) the pre-Triassic Alumbre and La Manga faults reactivated in an oblique mode. During the second episode of rifting, both Alumbre and La Manga faults continued to play, while WNW-trending normal fault developed in order to accommodate the strain inside both half-grabens. The third extensional event began with an abrupt marine rise inside the Arroyo Malo half-graben during late Middle Hettangian, as a result of the last displacement of the Alumbre fault, and finished with an abrupt marine drop associated with the desactivation of the La Manga fault. Fil:Giambiagi, L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Bechis, F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Lanés, S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Tunik, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:García, V. 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:Mescua, J. 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_00044822_v63_n4_p520_Giambiagi |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Extension Main Cordillera Neuquén Basin Rift Triassic-Jurassic depocenter displacement extensional tectonics fault zone formation mechanism graben Jurassic rifting structural geology tectonic evolution tectonic setting trend analysis Triassic Argentina Mendoza Neuquen Basin South America |
| spellingShingle |
Extension Main Cordillera Neuquén Basin Rift Triassic-Jurassic depocenter displacement extensional tectonics fault zone formation mechanism graben Jurassic rifting structural geology tectonic evolution tectonic setting trend analysis Triassic Argentina Mendoza Neuquen Basin South America Giambiagi, L. Bechis, F. Lanés, S. Tunik, M. García, V. Suriano, J. Mescua, J. Triassic-Jurassic development and evolution of the Atuel depocentre, Neuquén basin, Mendoza province |
| topic_facet |
Extension Main Cordillera Neuquén Basin Rift Triassic-Jurassic depocenter displacement extensional tectonics fault zone formation mechanism graben Jurassic rifting structural geology tectonic evolution tectonic setting trend analysis Triassic Argentina Mendoza Neuquen Basin South America |
| description |
The Atuel depocentre corresponds to a Late Triassic - Early Jurassic NNW-trending subbasin, located in the northern sector of the Neuquén basin. Based on pre-existing stratigraphical data and present structural analysis we propose that the Atuel depocentre is bounded by the presence of two NNW-trending major normal faults, named Alumbre and La Manga. These faults are inferred to have controlled the development of two west-facing half-grabens: the Río Blanco, a completely emerged half-graben, and the western Arroyo Malo, a completely submerged half-graben. The structural model presented here is based on the assumption that both, the basement structural grain and the regional extension direction, exerted a first-order control in the development and evolution of the Atuel depocentre. During the early stage of rifting (pre-Rhaetian - Middle Hettangian) the pre-Triassic Alumbre and La Manga faults reactivated in an oblique mode. During the second episode of rifting, both Alumbre and La Manga faults continued to play, while WNW-trending normal fault developed in order to accommodate the strain inside both half-grabens. The third extensional event began with an abrupt marine rise inside the Arroyo Malo half-graben during late Middle Hettangian, as a result of the last displacement of the Alumbre fault, and finished with an abrupt marine drop associated with the desactivation of the La Manga fault. |
| format |
JOUR |
| author |
Giambiagi, L. Bechis, F. Lanés, S. Tunik, M. García, V. Suriano, J. Mescua, J. |
| author_facet |
Giambiagi, L. Bechis, F. Lanés, S. Tunik, M. García, V. Suriano, J. Mescua, J. |
| author_sort |
Giambiagi, L. |
| title |
Triassic-Jurassic development and evolution of the Atuel depocentre, Neuquén basin, Mendoza province |
| title_short |
Triassic-Jurassic development and evolution of the Atuel depocentre, Neuquén basin, Mendoza province |
| title_full |
Triassic-Jurassic development and evolution of the Atuel depocentre, Neuquén basin, Mendoza province |
| title_fullStr |
Triassic-Jurassic development and evolution of the Atuel depocentre, Neuquén basin, Mendoza province |
| title_full_unstemmed |
Triassic-Jurassic development and evolution of the Atuel depocentre, Neuquén basin, Mendoza province |
| title_sort |
triassic-jurassic development and evolution of the atuel depocentre, neuquén basin, mendoza province |
| url |
http://hdl.handle.net/20.500.12110/paper_00044822_v63_n4_p520_Giambiagi |
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