Positive inversion of extensional footwalls in the southern Serra do Espinhaço, Brazil - insights from sandbox laboratory experiments
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| Natura: | Artículo científico |
| Lingua: | en |
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Academia Brasileira de Ciências
2006
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| _version_ | 1876443680349356032 |
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| author | Marcelo A. Martins-Neto |
| author_facet | Marcelo A. Martins-Neto |
| contents | Positive inversion of extensional footwalls in the southern Serra do Espinhaço, Brazil - insights from sandbox laboratory experiments Marcelo A. Martins-Neto Valéria E. Ribeiro Caroline Janette Souza Gomes Multidisciplinaria (Ciencias Naturales y Exactas) footwall block Espinhaço Basin inversion tectonics experimental modeling different detachment levels Analogue experiments were carried out to get insights into the processes governing positive inversion duringthe foreland propagating thrust tectonics in the southern Serra do Espinhaço, a Brasiliano/Panafrican foldthrustbelt in southeast Brazil. In particular, model listric half-grabens were inverted by applying contractionaldisplacement to the footwall blocks. We investigated two different inversion conditions in listric half-grabens:(i) extensional and contractional detachments at the same level and (ii) at different positions. The modelsrevealed that the development of a forward-breaking thrust system occurs in the basin synrift deposits, bycontractional translation of the extensional footwall block when the extensional and contractional master faultsdo not coincide. Our experiments show the tectonic imbrication between basement and synrift sequenceswhich characterizes the southern Serra do Espinhaço, and support the location in the eastern mountain rangedomain of the Espinhaço rift master fault system, which is not exposed at the surface. 2006 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32778212 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.2 Vol.78 |
| format | Artículo científico |
| id | redalyc_32778212 |
| institution | Redalyc |
| language | en |
| publishDate | 2006 |
| publisher | Academia Brasileira de Ciências |
| spellingShingle | Positive inversion of extensional footwalls in the southern Serra do Espinhaço, Brazil - insights from sandbox laboratory experiments Marcelo A. Martins-Neto Multidisciplinaria (Ciencias Naturales y Exactas) footwall block Espinhaço Basin inversion tectonics experimental modeling different detachment levels Positive inversion of extensional footwalls in the southern Serra do Espinhaço, Brazil - insights from sandbox laboratory experiments Marcelo A. Martins-Neto Valéria E. Ribeiro Caroline Janette Souza Gomes Multidisciplinaria (Ciencias Naturales y Exactas) footwall block Espinhaço Basin inversion tectonics experimental modeling different detachment levels Analogue experiments were carried out to get insights into the processes governing positive inversion duringthe foreland propagating thrust tectonics in the southern Serra do Espinhaço, a Brasiliano/Panafrican foldthrustbelt in southeast Brazil. In particular, model listric half-grabens were inverted by applying contractionaldisplacement to the footwall blocks. We investigated two different inversion conditions in listric half-grabens:(i) extensional and contractional detachments at the same level and (ii) at different positions. The modelsrevealed that the development of a forward-breaking thrust system occurs in the basin synrift deposits, bycontractional translation of the extensional footwall block when the extensional and contractional master faultsdo not coincide. Our experiments show the tectonic imbrication between basement and synrift sequenceswhich characterizes the southern Serra do Espinhaço, and support the location in the eastern mountain rangedomain of the Espinhaço rift master fault system, which is not exposed at the surface. 2006 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32778212 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.2 Vol.78 |
| title | Positive inversion of extensional footwalls in the southern Serra do Espinhaço, Brazil - insights from sandbox laboratory experiments |
| topic | Multidisciplinaria (Ciencias Naturales y Exactas) footwall block Espinhaço Basin inversion tectonics experimental modeling different detachment levels |
| url | https://www.redalyc.org/articulo.oa?id=32778212 |