Oblique half-graben inversion of the Mesozoic Neuquén Rift in the Malargüe Fold and Thrust Belt, Mendoza, Argentina: New insights from analogue models
The Malargüe fold and thrust belt, located in the Andean mountains between 34°S and 36°30′S, formed in response to contraction during Cenozoic times. Its structural style and geometry was controlled by the Mesozoic rift system that formed the Neuquén basin in west-central Argentina. The rift archite...
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2008
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01918141_v30_n7_p839_Yagupsky http://hdl.handle.net/20.500.12110/paper_01918141_v30_n7_p839_Yagupsky |
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paper:paper_01918141_v30_n7_p839_Yagupsky2023-06-08T15:19:53Z Oblique half-graben inversion of the Mesozoic Neuquén Rift in the Malargüe Fold and Thrust Belt, Mendoza, Argentina: New insights from analogue models Analogue modeling Malargüe fold Oblique inversion Thrust belt (1 1 1) orientation Argentina Cenozoic cross sectioning Early Jurassic Fold-and-thrust belts Half-graben normal faults Rift systems Structural styles Structural trends Subsurface data Triassic Computer networks Mathematical models Neon Tectonics analog model fold and thrust belt graben inversion tectonics lineament Mesozoic normal fault oblique fault rift zone rifting Argentina Malargue Mendoza Neuquen South America Capsicum pubescens The Malargüe fold and thrust belt, located in the Andean mountains between 34°S and 36°30′S, formed in response to contraction during Cenozoic times. Its structural style and geometry was controlled by the Mesozoic rift system that formed the Neuquén basin in west-central Argentina. The rift architecture in the southern sector of this belt was previously interpreted in terms of the present N-S compressive structural trends, assuming the inversion of pre-existing normal faults with the same orientation. Here, we propose that the NW-SE-trending El Manzano-Liu Cullín lineament, located in the northern termination of the Sierra Azul, reflects the presence of a half-graben master fault in the subsurface. This hypothesis is supported by subsurface data, a balanced cross section, and it is tested using a series of scaled sandbox analogue models. We suggest that the lineament responds to a reactivated NW-trending half-graben fault, hidden by the mainly N-S-trending Andean structures. The proposed orientation is in agreement with the NE-SW extension developed in the Neuquén basin during the Triassic-Early Jurassic. The modeling of the inverted oblique half-graben reveals that the strikes of the main structures of inversion-related belts may often be independent of the orientation of the previously developed extensional system, providing a new perspective for their interpretation. © 2008. 2008 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01918141_v30_n7_p839_Yagupsky http://hdl.handle.net/20.500.12110/paper_01918141_v30_n7_p839_Yagupsky |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Analogue modeling Malargüe fold Oblique inversion Thrust belt (1 1 1) orientation Argentina Cenozoic cross sectioning Early Jurassic Fold-and-thrust belts Half-graben normal faults Rift systems Structural styles Structural trends Subsurface data Triassic Computer networks Mathematical models Neon Tectonics analog model fold and thrust belt graben inversion tectonics lineament Mesozoic normal fault oblique fault rift zone rifting Argentina Malargue Mendoza Neuquen South America Capsicum pubescens |
| spellingShingle |
Analogue modeling Malargüe fold Oblique inversion Thrust belt (1 1 1) orientation Argentina Cenozoic cross sectioning Early Jurassic Fold-and-thrust belts Half-graben normal faults Rift systems Structural styles Structural trends Subsurface data Triassic Computer networks Mathematical models Neon Tectonics analog model fold and thrust belt graben inversion tectonics lineament Mesozoic normal fault oblique fault rift zone rifting Argentina Malargue Mendoza Neuquen South America Capsicum pubescens Oblique half-graben inversion of the Mesozoic Neuquén Rift in the Malargüe Fold and Thrust Belt, Mendoza, Argentina: New insights from analogue models |
| topic_facet |
Analogue modeling Malargüe fold Oblique inversion Thrust belt (1 1 1) orientation Argentina Cenozoic cross sectioning Early Jurassic Fold-and-thrust belts Half-graben normal faults Rift systems Structural styles Structural trends Subsurface data Triassic Computer networks Mathematical models Neon Tectonics analog model fold and thrust belt graben inversion tectonics lineament Mesozoic normal fault oblique fault rift zone rifting Argentina Malargue Mendoza Neuquen South America Capsicum pubescens |
| description |
The Malargüe fold and thrust belt, located in the Andean mountains between 34°S and 36°30′S, formed in response to contraction during Cenozoic times. Its structural style and geometry was controlled by the Mesozoic rift system that formed the Neuquén basin in west-central Argentina. The rift architecture in the southern sector of this belt was previously interpreted in terms of the present N-S compressive structural trends, assuming the inversion of pre-existing normal faults with the same orientation. Here, we propose that the NW-SE-trending El Manzano-Liu Cullín lineament, located in the northern termination of the Sierra Azul, reflects the presence of a half-graben master fault in the subsurface. This hypothesis is supported by subsurface data, a balanced cross section, and it is tested using a series of scaled sandbox analogue models. We suggest that the lineament responds to a reactivated NW-trending half-graben fault, hidden by the mainly N-S-trending Andean structures. The proposed orientation is in agreement with the NE-SW extension developed in the Neuquén basin during the Triassic-Early Jurassic. The modeling of the inverted oblique half-graben reveals that the strikes of the main structures of inversion-related belts may often be independent of the orientation of the previously developed extensional system, providing a new perspective for their interpretation. © 2008. |
| title |
Oblique half-graben inversion of the Mesozoic Neuquén Rift in the Malargüe Fold and Thrust Belt, Mendoza, Argentina: New insights from analogue models |
| title_short |
Oblique half-graben inversion of the Mesozoic Neuquén Rift in the Malargüe Fold and Thrust Belt, Mendoza, Argentina: New insights from analogue models |
| title_full |
Oblique half-graben inversion of the Mesozoic Neuquén Rift in the Malargüe Fold and Thrust Belt, Mendoza, Argentina: New insights from analogue models |
| title_fullStr |
Oblique half-graben inversion of the Mesozoic Neuquén Rift in the Malargüe Fold and Thrust Belt, Mendoza, Argentina: New insights from analogue models |
| title_full_unstemmed |
Oblique half-graben inversion of the Mesozoic Neuquén Rift in the Malargüe Fold and Thrust Belt, Mendoza, Argentina: New insights from analogue models |
| title_sort |
oblique half-graben inversion of the mesozoic neuquén rift in the malargüe fold and thrust belt, mendoza, argentina: new insights from analogue models |
| publishDate |
2008 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01918141_v30_n7_p839_Yagupsky http://hdl.handle.net/20.500.12110/paper_01918141_v30_n7_p839_Yagupsky |
| _version_ |
1768543700252622848 |