Paleofeições erosivas na porção sudeste da Bacia Sedimentar do Bauru
Paleo-erosion, understood to be a severe and ancient erosion, is characterized by the presence of water and can be studied utilizing cosmogenic nuclides such as 10Be. This method makes possible the determination of denudation rates on practically every terrestrial area. Therefore, it is efficient to...
| Autor principal: | Campos, Diego Vinicius |
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| Formato: | Trabalho de Conclusão de Curso (Graduação) |
| Idioma: | Português |
| Publicado em: |
Universidade Tecnológica Federal do Paraná
2020
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| Assuntos: | |
| Acesso em linha: |
http://repositorio.utfpr.edu.br/jspui/handle/1/6989 |
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| Resumo: |
Paleo-erosion, understood to be a severe and ancient erosion, is characterized by the presence of water and can be studied utilizing cosmogenic nuclides such as 10Be. This method makes possible the determination of denudation rates on practically every terrestrial area. Therefore, it is efficient to compare different paleo-erosions. Although the measurement of these rates is feasible, the utilization of additional materials is fundamental to correctly analyze a given area, such as the soil type, clime, presence of vegetation, among others. In this final project, five paleo-erosions located in the southeast of Bauru Sedimentary Basin, south of Brazil, are described. Moreover, their respective denudation rates are measured and afterwards compared with paleo-erosion rates from other locations. The denudation rates determined were: 45,56 m.Myr-1; 65,80 m.Myr-1; 20,44 m.Myr-1; 17,24 m.Myr-1 and 84,48 m.Myr-1, being the mean denudation rate equal to 46,70 m.Myr-1 (n=5). This mean denudation rate is within the same range of mean paleo-erosive denudation rates measured at the confluence of the rivers Allier and Dore, France (54,22 m.Myr-1, n=14), Hang Son Doong, Vietnam (37,00 m.Myr-1, n=20) and in the Meuse river, Netherland (25,29 m.Myr-1, n=25). The exception is the mean paleo-erosive denudation rate found in the Eel river, United States (201,88 m.Myr-1, n=16), due to the occurrence of a regional rock uplift. However, the five paleo-erosions are located in a flat landscape, with low declivity, while the other places compared to are situated in mountainous regions. Therefore, the denudation rates determined from those paleo-erosions are quite elevated. |
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