Caracterização da sedimentação superficial do talude continental da foz do Amazonas
This work aims to characterize the recent sedimentation of the continental slope of the mouth of the Amazon, based on two sedimentary records of the piston corer type. The following were evidenced: shallow stratigraphy, granulometric parameters, organic matter content and calcium carbonate. The resu...
| Autor principal: | MARTINS, Larissa Alves |
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| Grau: | Trabalho de Conclusão de Curso - Graduação |
| Publicado em: |
2019
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| Assuntos: | |
| Acesso em linha: |
https://bdm.ufpa.br/jspui/handle/prefix/2108 |
| Resumo: |
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This work aims to characterize the recent sedimentation of the continental slope of the mouth of the Amazon, based on two sedimentary records of the piston corer type. The following were evidenced: shallow stratigraphy, granulometric parameters, organic matter content and calcium carbonate. The results of both sediment samples were classified as muddy sediments, with predominance of the coarse silt fraction deposited in an environment with very high hydrodynamics. The organic matter content levels varied from 1% to 7% with a mean of 0.04% for ANP-S85 and 1% to 7% with a mean of 0.01% for ANP-S104. Calcium carbonate levels ranged from 0.44% to 3.38% with a mean of 1.73% for ANP-S85 and 0.25% to 4.10% with a mean of 1.89% for ANP-S104. The analysis made it possible to infer that the sediments present in the continental slope of the mouth of the Amazon can have two possible sources originating mainly from the continental input such as rivers along with material produced by organisms in smaller scale, or by sediments present in the Andean regions, carried mainly by flows gravity. |