Campo Belo Metamorphic Complex: tectonic Evolution of an Archean sialic crust of the southern São Francisco Craton in Minas Gerais (Brazil)
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| Formato: | Artículo científico |
| Lenguaje: | en |
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Academia Brasileira de Ciências
2001
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| _version_ | 1876424801842626560 |
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| author | Maurício A. Carneiro |
| author_facet | Maurício A. Carneiro |
| contents | Campo Belo Metamorphic Complex: tectonic Evolution of an Archean sialic crust of the southern São Francisco Craton in Minas Gerais (Brazil) Maurício A. Carneiro Arildo H. Oliveira Multidisciplinaria (Ciencias Naturales y Exactas) Craton Archean lithodemic units tectonic evolution metamorphic complex Systematic geological studies performed in the study area allowed the characterization of six lithodemicunits: three gneissic, one amphibolitic, one supracrustal and one fissure mafic. The mineral assemblage andthe structural record of these lithodemic units indicate that the study area was affected by five tectonothermalevents. The structural pattern of the first and oldest event occurred under granulite facies conditions and revealsessentially a sinistral kinematic pattern. The second event, showing dominant extensional characteristics, isrelated to the generation of an ensialic basin filled by the volcano-sedimentary sequence of the supracrustallithodemic unit. The third event, which is the most expressive in the study region, is characterized by avigorous regional migmatization process and by the generation of the Claudio Shear Zone, presenting dextralkinematic movement. The fourth event is represented by a fissure mafic magmatism (probably two differentmafic dike swarms) and finally, the fifth event is a regional metamorphic re-equilibration that reached thegreenschist facies, closing the main processes of the tectonic evolution of the Campo Belo MetamorphicComplex. 2001 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32773309 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.3 Vol.73 |
| format | Artículo científico |
| id | redalyc_32773309 |
| institution | Redalyc |
| language | en |
| publishDate | 2001 |
| publisher | Academia Brasileira de Ciências |
| spellingShingle | Campo Belo Metamorphic Complex: tectonic Evolution of an Archean sialic crust of the southern São Francisco Craton in Minas Gerais (Brazil) Maurício A. Carneiro Multidisciplinaria (Ciencias Naturales y Exactas) Craton Archean lithodemic units tectonic evolution metamorphic complex Campo Belo Metamorphic Complex: tectonic Evolution of an Archean sialic crust of the southern São Francisco Craton in Minas Gerais (Brazil) Maurício A. Carneiro Arildo H. Oliveira Multidisciplinaria (Ciencias Naturales y Exactas) Craton Archean lithodemic units tectonic evolution metamorphic complex Systematic geological studies performed in the study area allowed the characterization of six lithodemicunits: three gneissic, one amphibolitic, one supracrustal and one fissure mafic. The mineral assemblage andthe structural record of these lithodemic units indicate that the study area was affected by five tectonothermalevents. The structural pattern of the first and oldest event occurred under granulite facies conditions and revealsessentially a sinistral kinematic pattern. The second event, showing dominant extensional characteristics, isrelated to the generation of an ensialic basin filled by the volcano-sedimentary sequence of the supracrustallithodemic unit. The third event, which is the most expressive in the study region, is characterized by avigorous regional migmatization process and by the generation of the Claudio Shear Zone, presenting dextralkinematic movement. The fourth event is represented by a fissure mafic magmatism (probably two differentmafic dike swarms) and finally, the fifth event is a regional metamorphic re-equilibration that reached thegreenschist facies, closing the main processes of the tectonic evolution of the Campo Belo MetamorphicComplex. 2001 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32773309 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.3 Vol.73 |
| title | Campo Belo Metamorphic Complex: tectonic Evolution of an Archean sialic crust of the southern São Francisco Craton in Minas Gerais (Brazil) |
| topic | Multidisciplinaria (Ciencias Naturales y Exactas) Craton Archean lithodemic units tectonic evolution metamorphic complex |
| url | https://www.redalyc.org/articulo.oa?id=32773309 |