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	Provedor de dados Anais da ABC (AABC) (2) Autor Nogueira,Afonso C.R. (2) Behling,Hermann (1) Horbe,Adriana M.C. (1) Mapes,Russell (1) Riccomini,Claudio (1) Sial,Alcides N. (1) Mais... Palavra-chave Amazon Craton (1) Araras Group (1) Carbon and oxygen isotopes (1) Ediacaran (1) Flooding plain (1) Glaciation (1) Guia Formation (1) Holocene (1) Lacustrine environment (1) Paleovegetation (1) Pb isotopes (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2011 (1) 2007 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Carbon and oxygen isotope geochemistry of Ediacaran outer platform carbonates, Paraguay Belt, central Brazil Anais da ABC (AABC) Riccomini,Claudio; Nogueira,Afonso C.R.; Sial,Alcides N.. After the late Cryogenian glaciation the central region of Brazil was the site of extensive deposition of platformal carbonates of the Araras Group. This group includes a basal cap carbonate sequence succeeded by transgressive, deep platform deposits of bituminous lime mudstone and shale. Facies and stratigraphic data combined with carbon and oxygen isotopic analyses of the most complete section of the transgressive deposits, exposed in the Guia syncline, were used to evaluate the depositional paleoenvironment and to test the correlation of these deposits along the belt and with other units worldwide. The studied succession consists of 150 m thick tabular beds of black to grey lime mudstone and shale with predominantly negative delta13C PDB values around... Tipo: Info:eu-repo/semantics/article Palavras-chave: Carbon and oxygen isotopes; Ediacaran; Araras Group; Guia Formation; Amazon Craton; Glaciation. Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652007000300012 Environmental changes in the western Amazônia: morphological framework, geochemistry, palynology and radiocarbon dating data Anais da ABC (AABC) Horbe,Adriana M.C.; Behling,Hermann; Nogueira,Afonso C.R.; Mapes,Russell. The sediments from the Coari lake, a “terra firme” lake sculpted into Plio-Pleistocene deposits, and the Acará lake, a flooding-type lake developed on Quaternary sediments in the floodplain of the mid-Solimões river, in the western Amazônia, Brazil, were studied to investigate the environmental condition of their developing. This study includes mineral composition, geochemistry, Pb isotope, palinology, radiocarbon-age and morphological framework of the lakes obtained from SRTM satellite images. The geological and the environmental conditions in the two lakes are highly variable and suggest that their evolution reflect autogenic processes under humid rainforest condition. Although kaolinite, quartz, muscovite, illite, and smectite are the main minerals in... Tipo: Info:eu-repo/semantics/article Palavras-chave: Pb isotopes; Lacustrine environment; Paleovegetation; Flooding plain; Holocene. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652011000300008 Registros recuperados: 2 Primeira ... 1 ... Última

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