Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

OSL dating of sediments from Negro and Solimoes rivers - Amazon, Brazil

Full text
Author(s):
Fiore, M. [1] ; Soares, E. A. A. [2] ; Mittani, J. C. R. [1] ; Yee, M. [1] ; Tatumi, S. H. [3]
Total Authors: 5
Affiliation:
[1] Fac Tecnol Sao Paulo FATEC SP, BR-01124060 Sao Paulo - Brazil
[2] Univ Fed Amazonas, Manaus, Amazonas - Brazil
[3] Univ Fed Sao Paulo, BR-11030900 Santos - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Radiation Physics and Chemistry; v. 95, p. 113-115, FEB 2014.
Web of Science Citations: 3
Abstract

In this work, the OSL dating results of Quaternary fluvial deposits from the confluence of Negro and Solimoes rivers were studied. The equivalent doses (D-e) of sediments were obtained using a Single Aliquot Regeneration (SAR) protocol. Statistic studies were made using frequency histogram, weighted histogram and Radial plot in order to analyze the D-e fluctuations. Ages from 74.5 to 205 thousand of years (Pleistocene) were recorded. The gamma-ray spectroscopy was used to evaluate the natural radioisotopes concentrations of the samples and low concentrations were found with values between 0.64 and 3.71 ppm for U-235 and U-238; 2.01-9.77 ppm for Th-232; already, for K-40, the concentration was negligible. The OSL dating of sediments has contributed to a better understanding of the evolution of Negro and Solimbes rivers, in Amazon, Brazil. (C) 2013 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 09/02069-2 - Deployment and development of methodology for single-grain dating by optically stimulated luminescence
Grantee:Sonia Hatsue Tatumi
Support Opportunities: Regular Research Grants