文章基本信息

标题：DISTRIBUIÇÃO E ANÁLISE DE SEDIMENTOS TURFOSOS HOLOCÊNICOS NA PLANÍCIE DO ALTO TIBAGI, CAMPOS GERAIS, PARANÁ.
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作者：Renato Lada Guerreiro ; Nelson Vicente Lovatto Gasparetto ; Mauro Parolin 等
期刊名称：Revista de Ciências Ambientais
印刷版ISSN：1981-8858
出版年度：2012
卷号：6
期号：1
页码：105-116
DOI：10.18316/430
语种：Portuguese
出版社：Centro Universitário La Salle - Unilasalle Canoas
摘要：Paleoenvironmental conditions resulting from Quaternary paleoclimatic and paleohydrological changes allowed the formation of peaty sediments in at upper Tibagi alluvial plain in the Late Holocene. We analyzed the distribution and fuel potential, and inferences about the paleoenvironmental conditions responsible for the deposition of these sediments. The peaty sediments tend to concentrate between altimetric quotas 775 and 780 m for about 12 km from the confluence of Gabiroba River and Tibagi River. The deposits showed ages between 3,220, 2,770 and 1,340 years BP ( 14 C) and are distributed into approximately 10 km² through the alluvial plain. The sediments deposition occurred with the Tibagi River local base level about 2 to 4 meters higher than the current at 3,220 years BP under climatic conditions slightly drier than the present. Based on the extent and thickness of the deposit, it is estimated that paleomass would reach about 14.000.000 m³. The deposits presented high decomposition degree (H9 and H10) and ombrotrophic and mineralotrophic features. The low average levels of carbon and high mineral content made it impossible to be used as fuel. It is estimated that the burial of these deposits and incision occurred after 1,340 years BP., under wet climate, similar or close to the present conditions of temperature and humidity.
其他摘要：Paleoenvironmental conditions resulting from Quaternary paleoclimatic and paleohydrological changes allowed the formation of peaty sediments in at upper Tibagi alluvial plain in the Late Holocene. We analyzed the distribution and fuel potential, and inferences about the paleoenvironmental conditions responsible for the deposition of these sediments. The peaty sediments tend to concentrate between altimetric quotas 775 and 780 m for about 12 km from the confluence of Gabiroba River and Tibagi River. The deposits showed ages between 3,220, 2,770 and 1,340 years BP (14C) and are distributed into approximately 10 km² through the alluvial plain. The sediments deposition occurred with the Tibagi River local base level about 2 to 4 meters higher than the current at 3,220 years BP under climatic conditions slightly drier than the present. Based on the extent and thickness of the deposit, it is estimated that paleomass would reach about 14.000.000 m³. The deposits presented high decomposition degree (H9 and H10) and ombrotrophic and mineralotrophic features. The low average levels of carbon and high mineral content made it impossible to be used as fuel. It is estimated that the burial of these deposits and incision occurred after 1,340 years BP., under wet climate, similar or close to the present conditions of temperature and humidity.
关键词：paleoenvironmental change;peaty sediments;Lower Holocene;mudanças paleoambientais;sedimentos turfosos;Holoceno Inferior
其他关键词：paleoenvironmental change; peaty sediments; Lower Holocene