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OSL age determinations of Pleistocene fluvial deposits in Central Amazonia Anais da ABC (AABC)
Soares,Emílio A.A.; Tatumi,Sonia H.; Riccomini,Claudio.
Absolute dating methods have been used in chronological studies of geological processes and sedimentary units of Quaternary age in Central Amazonia, Brazil. Although radiocarbon dating has been very useful in archaeological research and soil studies, the temporal interval of this method is inefficient in evaluating the sedimentation aspects and geological events from the beginning of the Quaternary in the Amazon basin. The use of crystal luminescence dating has been one of the most promising tool for determining the absolute dating of Quaternary deposits in the Amazonian region. Optically stimulated luminescence (OSL) dating, following the MAR and SAR protocols, in a tectonic-sedimentary study of Quaternary fluvial deposits in the confluence area of the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Crystal luminescence dating; Quaternary; Fluvial terraces; Central Amazonia.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652010000300017
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TL, OSL and C-14 dating results of the sediments and bricks from mummified nuns' grave Anais da ABC (AABC)
Tudela,Diego R.G.; Tatumi,Sonia H.; Yee,Márcio; Brito,Silvio L.M.; Morais,José L.; Morais,Daisy de; Piedade,Silvia C.; Munita,Casimiro S.P.; Hazenfratz,Roberto.
This paper presents the results of TL and OSL dating of soil and fragments of bricks from a grave, which was occupied by two mummified nuns, found at "Luz" Monastery, located in the state of São Paulo, Brazil. The TL and OSL ages were compared to C-14 dating ones obtained from bone collagens of the mummies. The majority of the ages is related to the eighteenth century. The gamma-ray spectroscopy was used to evaluate natural radioisotope concentrations in the samples, and by using these concentrations the annual dose rates, from 3.0 to 5.3 Gy/kyr, were obtained. Neutron activation analysis was performed and the radioisotope contents results are in agreement with those obtained by gamma-ray spectroscopy. The contents of U, Th and Ce elements were higher than...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Dating; Thermoluminescence (TL); Optical stimulated Luminescence (OSL); Mummified Nuns; Mosteiro da "Luz".
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000200002
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