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| Registros recuperados: 23 | |
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| MENDES,Anderson C.; DANTAS,Ângela B.; RIBEIRO,Anne Caroline S.; SANTOS,Livaldo O.; MENDES,Kamilla C.; MORAES,Dorsan dos Santos; ALMEIDA,Rodolfo M.. |
| ABSTRACT Studies on provenance of minerals in Amazonian rivers focus mostly on suspended sediments, while processes that control bottom-sediment production and distribution are still little known. We determined the provenance of the bottom sediments of Green Lake, a micro-basin draining into the Tapajós River, in the eastern Brazilian Amazon. We used X-ray powder diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), scanning electron microscope (SEM) and, cathodoluminescence techniques to analyze clay, light and heavy minerals of 22 samples. The lake is L-shaped, with 5.5 m maximum depth, and predominance of mud over sand in the center. Quartz and feldspar were dominant in the light fraction, while zircon, tourmaline, kyanite, rutile, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Alter do Chão Formation; Lacustrine sediment; Amazon Basin; Santarém; Mineral characterization. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672020000200159 |
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| Registros recuperados: 23 | |
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