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• W4385846163 abstract "The thermal conductivity of different volcanic lithotypes from Paraná Basin was measured by the needle probe in semi-infinite space and was related to chemical and petrographic parameters. The basic lithotype (SiO 2 < 55%) shows conductivity varying from 1.9 to 2.5 W/mK, the acid rock samples (SiO 2 > 63%) show thermal conductivities in the range of 1.6 to 3.O W/mK, with an important superimposition zone around 2.0 W/mK. The intermediate samples (55% < SiO 2 < 63%) show values of thermal conductivity between the two ranges cited above (1.7 to 2.7 W/mK). The data suggest that the relationship between thermal conductivity and chemical parameters is very weak and it is not possible to separate the different lithotypes by thermal conductivity. On the other hand, there seems to exist a stronger relationship between thermal conductivity and quantity of vitreous material present in the samples. Através do emprego da sonda tipo agulha para espaço semi-infinito foi determinada a condutividade térmica dos diferentes litotipos vulcânicos da Bacia do Paraná e efetuada sua correlação com os parâmetros químicos, físicos e petrográficos que caracterizam as amostras. As rochas básicas (SiO 2 < 55%) apresentam valores de condutividade térmica no intervalo de 1,9 a 2,5 W/mK, enquanto que as ácidas (SiO 2 > 63%) apresentam um campo de variação de 1,6 a 3,0 W/mK, com importante zona de sobreposição em torno de 2.0W/mK. As rochas intermediárias (55% < SiO 2 < 63%) apresentam valores de condutividade intermediários entre os dois intervalos acima citados (1,7 a 2,7 W/mK). Os valores encontrados sugerem que a relação entre a condutividade térmica e os parâmetros químicos é pouco acentuada, indicando que não é possível separar os diferentes litotipos. Por outro lado, parece existir uma correlação mais nítida com os parâmetros petrográficos, como por exemplo, o teor de material vítreo." @default.
• W4385846163 created "2023-08-16" @default.
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• W4385846163 date "2018-07-17" @default.
• W4385846163 modified "2023-10-06" @default.
• W4385846163 title "Condutividade Térmica dos Diferentes Litotipos Vulcânicos da Bacia do Paraná" @default.
• W4385846163 doi "https://doi.org/10.22564/brjg.v6i1-2.1068" @default.
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