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Deployment and development of methodology for single-grain dating by optically stimulated luminescence

Grant number: 09/02069-2
Support Opportunities:Regular Research Grants
Duration: November 01, 2009 - October 31, 2012
Field of knowledge:Physical Sciences and Mathematics - Geosciences
Principal Investigator:Sonia Hatsue Tatumi
Grantee:Sonia Hatsue Tatumi
Host Institution: Instituto de Saúde e Sociedade (ISS). Universidade Federal de São Paulo (UNIFESP). Campus Baixada Santista. Santos , SP, Brazil


This project proposes the nucleation of a new line of dating research of sediments using the technique of dating of quartz and feldspar grains in size around 300¼m in diameter. In the literature this technique is called the "single-grain dating", by Optically Stimulated Luminescence (OSL). The interest in this technique is mainly in the fluvial sediments dating, where the grain cannot have its OSL signal decreased by long enough sunlight exposition, or have been dragged under cloudy water disabling its direct exposure to sunlight. This technique can identify and eliminate the unbleached grain, observing its age, which is discrepant from the average. Therefore, the obtained age by this method will be much closer to real.We intend to use this method, especially with samples of sediments collected in the Amazon region, with the collaboration of researchers Prof. Dr. Dilce of Fatima Rossetti (INPE-São José dos Campos) and Prof.Dr. Emilio Soares (University Federal of Amazonas). The choice of this area of study was based on the importance of this region, the paleoenvironments results treat the study of global climate change and also due to lack of data that occurs in this region nowadays. The advance of this project will start, in the country, a line of original research; it will bring a technological increase in the laboratorial infrastructure, which will match levels found in some developed countries. (AU)

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Scientific publications (10)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
SOARES, ALVARO DE FARIAS; TATUMI, SONIA HATSUE; ROCCA, RENE ROJAS. Influence of heat treatment on luminescent properties of the HfO2, synthesized by precipitation method. Radiation Physics and Chemistry, v. 180, . (09/02069-2)
GUILHEIRO, J. M.; TATUMI, S. H.; SOARES, A. DE F.; COURROL, L. C.; BARBOSA, R. F.; ROCCA, R. R.. Correlation study between OSL, TL and PL emissions of yellow calcite. Journal of Luminescence, v. 233, . (09/02069-2)
FIORE, M.; SOARES, E. A. A.; MITTANI, J. C. R.; YEE, M.; TATUMI, S. H.. OSL dating of sediments from Negro and Solimoes rivers - Amazon, Brazil. Radiation Physics and Chemistry, v. 95, p. 113-115, . (09/02069-2)
GUGLIOTTI, C.; MORIYA, K.; TATUMI, S.; MITTANI, J.. Synthesis and luminescence studies of Tb-doped MgO-MgAl2O4-Mg2SiO4 ceramic for use in radiation dosimetry. Applied Radiation and Isotopes, v. 135, p. 219-223, . (09/02069-2)
SOARES, ALVARO DE FARIAS; TATUMI, SONIA HATSUE; ROCCA, RENE ROJAS; COURROL, LILIA CORONATO. Morphological and luminescent properties of HfO2 nanoparticles synthesized by precipitation method. Journal of Luminescence, v. 219, . (09/02069-2)
ROSSETTI, DILCE DE FATIMA; GRIBEL, ROGERIO; LISBOA COHEN, MARCELO CANCELA; VALERIANO, MARCIO DE MORISSON; TATUMI, SONIA HATSUE; YEE, MARCIO. The role of Late Pleistocene-Holocene tectono-sedimentary history on the origin of patches of savanna vegetation in the middle Madeira River, southwest of the Amazonian lowlands. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY, v. 526, p. 136-156, . (09/02069-2, 13/50475-5)
TATUMI, SONIA H.; SOARES, ALVARO DE F.; TUDELA, DIEGO R. G.; GONCALVES, KATIA A.; ROCCA, RENE R.. Sol-gel synthesis of strontium aluminate phosphor and its TL and OSL properties. Radiation Physics and Chemistry, v. 157, p. 15-21, . (09/02069-2)
ROSSETTI, DILCE F.; GRIBEL, ROGERIO; TOLEDO, PETER M.; TATUMI, SONIA H.; YEE, MARCIO; TUDELA, DIEGO R. G.; MUNITA, CASIMIRO S.; COELHO, LUIZ DE SOUZA. Unfolding long-term Late Pleistocene-Holocene disturbances of forest communities in the southwestern Amazonian lowlands. ECOSPHERE, v. 9, n. 10, . (09/02069-2, 13/50475-5)
TUDELA, D. R. G.; TATUMI, S. H.; COURROL, L. C.; ROCCA, R. R.; MITTANI, J. C. R.. Luminescence properties of SiO2:Tb nanocrystals obtained via sol-gel route and its applicability to environmental ionizing radiation dosimetry. Journal of Luminescence, v. 207, p. 123-128, . (09/02069-2)
SOARES, A. F.; TATUMI, S. H.; MAZZO, T. M.; ROCCA, R. R.; COURROL, L. C.. Study of morphological and luminescent properties (TL and OSL) of ZnO nanocrystals synthetized by coprecipitation method. Journal of Luminescence, v. 186, p. 135-143, . (09/02069-2)

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