Mechanisms and deformational stages at the eastern Andean front (36°S, Argentina)
The eastern Andean orogenic front at 36°S shows unique attributes when compared to neighbor segments, from an anomalous eastward development of the orogenic front area due to the uplift of a zone of reduced topography in the foothills constituting a pre-Andean belt, to the occurrence of great Late O...
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2013
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07187092_v40_n3_p504_AlvarezCerimedo http://hdl.handle.net/20.500.12110/paper_07187092_v40_n3_p504_AlvarezCerimedo |
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paper:paper_07187092_v40_n3_p504_AlvarezCerimedo2023-06-08T15:43:16Z Mechanisms and deformational stages at the eastern Andean front (36°S, Argentina) Brittle-ductile transitions Foreland basin Malargüe fold and thrust belt Orogenic front Southern central Andes Tectonic inversion brittle deformation ductile deformation exhumation extensional tectonics fold and thrust belt foreland basin Miocene normal fault Oligocene orogenic belt orogeny tectonic evolution Andes Argentina Malargue Mendoza The eastern Andean orogenic front at 36°S shows unique attributes when compared to neighbor segments, from an anomalous eastward development of the orogenic front area due to the uplift of a zone of reduced topography in the foothills constituting a pre-Andean belt, to the occurrence of great Late Oligocene to Early Miocene within-plate series. The study of this eastern pre-Andean belt from extensive field mapping and analysis of seismic lines reveals a complex evolution that encompasses a pre-Late Oligocene stage of exhumation prior to the Late Oligocene-Miocene within-plate volcanic products which are coetaneous with an extensional relaxation phase, and one last period of contractional deformation that uplifted the pre-Andean sector in Miocene times. This last stage of orogenic construction is associated with synorogenic strata that show coarsening up sedimentary cycles with an eastward provenance. Contractional mechanisms involved deep ramps rooted into the basement, some of which are linked to inverted Late Oligocene-Miocene normal faults, to shallower detachments located in the Upper Cretaceous and Miocene incompetent layers. 2013 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07187092_v40_n3_p504_AlvarezCerimedo http://hdl.handle.net/20.500.12110/paper_07187092_v40_n3_p504_AlvarezCerimedo |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Brittle-ductile transitions Foreland basin Malargüe fold and thrust belt Orogenic front Southern central Andes Tectonic inversion brittle deformation ductile deformation exhumation extensional tectonics fold and thrust belt foreland basin Miocene normal fault Oligocene orogenic belt orogeny tectonic evolution Andes Argentina Malargue Mendoza |
| spellingShingle |
Brittle-ductile transitions Foreland basin Malargüe fold and thrust belt Orogenic front Southern central Andes Tectonic inversion brittle deformation ductile deformation exhumation extensional tectonics fold and thrust belt foreland basin Miocene normal fault Oligocene orogenic belt orogeny tectonic evolution Andes Argentina Malargue Mendoza Mechanisms and deformational stages at the eastern Andean front (36°S, Argentina) |
| topic_facet |
Brittle-ductile transitions Foreland basin Malargüe fold and thrust belt Orogenic front Southern central Andes Tectonic inversion brittle deformation ductile deformation exhumation extensional tectonics fold and thrust belt foreland basin Miocene normal fault Oligocene orogenic belt orogeny tectonic evolution Andes Argentina Malargue Mendoza |
| description |
The eastern Andean orogenic front at 36°S shows unique attributes when compared to neighbor segments, from an anomalous eastward development of the orogenic front area due to the uplift of a zone of reduced topography in the foothills constituting a pre-Andean belt, to the occurrence of great Late Oligocene to Early Miocene within-plate series. The study of this eastern pre-Andean belt from extensive field mapping and analysis of seismic lines reveals a complex evolution that encompasses a pre-Late Oligocene stage of exhumation prior to the Late Oligocene-Miocene within-plate volcanic products which are coetaneous with an extensional relaxation phase, and one last period of contractional deformation that uplifted the pre-Andean sector in Miocene times. This last stage of orogenic construction is associated with synorogenic strata that show coarsening up sedimentary cycles with an eastward provenance. Contractional mechanisms involved deep ramps rooted into the basement, some of which are linked to inverted Late Oligocene-Miocene normal faults, to shallower detachments located in the Upper Cretaceous and Miocene incompetent layers. |
| title |
Mechanisms and deformational stages at the eastern Andean front (36°S, Argentina) |
| title_short |
Mechanisms and deformational stages at the eastern Andean front (36°S, Argentina) |
| title_full |
Mechanisms and deformational stages at the eastern Andean front (36°S, Argentina) |
| title_fullStr |
Mechanisms and deformational stages at the eastern Andean front (36°S, Argentina) |
| title_full_unstemmed |
Mechanisms and deformational stages at the eastern Andean front (36°S, Argentina) |
| title_sort |
mechanisms and deformational stages at the eastern andean front (36°s, argentina) |
| publishDate |
2013 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07187092_v40_n3_p504_AlvarezCerimedo http://hdl.handle.net/20.500.12110/paper_07187092_v40_n3_p504_AlvarezCerimedo |
| _version_ |
1768545741197803520 |