Caracterização dos Sedimentos Turfosos em Campo Mourão, Paraná, Brasil (Characterization of Peat Bogs in Campo Mourão, Paraná State, Brazil )
DOI:
https://doi.org/10.26848/rbgf.v7.2.p319-326Keywords:
Turfa, escala de von Post, Pleistoceno Superior, Holoceno.Abstract
Foi caracterizado os sedimentos turfosos da planície dos rios Água dos Papagaios e Ranchinho no município de Campo Mourão, PR. Para tanto, foram determinados: a) a datação absoluta (14C); b) a caracterização dos sedimentos via escala de von Post; c) o percentual de queima do material, sólido e volátil e d) a determinação granulométrica do sedimento. Os depósitos no rio Água dos Papagaios apresentaram idades entre ~7.280 anos cal AP. (75 cm) e ~3.280 anos cal AP. (45 cm), portanto formada durante o Holoceno. Por sua vez o depósito do rio Ranchinho apresentou idades mais antigas, de ~48.800±270 anos AP. (95 cm) e ~41.460 anos cal AP. (45 cm). Os depósitos apresentaram alto grau de decomposição entre as classes H6 e H9 (hêmica e sáprica). Os percentuais de combustão volátil e sólido foram maiores no testemunho rio Água dos Papagaios (29,89% e 45,06% respectivamente). No entanto, em virtude da presença de conteúdo mineralógico e dos valores médios de combustão o uso de ambas as turfeiras como combustível não é viável.
A B S T R A C T
Were characterized the peaty sediments of rivers Água dos Papagaios and Ranchinho floodplain in Campo Mourão, PR. Thus, we determined: a) the absolute dating (14C); b) the characterization of sediments with von Post scale; c) the percentage of the burning material, solid and volatile; d) sediments granulometry. The deposits ages in the river Água dos Papagaios were between ~ 7280 years cal BP. (75 cm) and ~ 3280 years cal BP. (45 cm) thus formed during the Holocene. Turn the deposit of the river Ranchinho presented higher age of ~ 48,800 ± 270 years BP. (95 cm), and ~ 41,460 years cal BP. (45 cm). The deposits showed a high degree of decomposition between classes H6 and H9. The percentage of volatile and solid combustion were higher in the Água dos Papagaios core (29.89% and 45.06 % respectively). However, due to the presence of mineral content and average values of the combustion use of both peats as fuel is not feasible.
Key words: Peat, von Post scale, Pleistocene, Holocene.
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Copyright (c) 2014 Leandro Domingos Luz, Mauro Parolin
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