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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Luminescence characteristics of quartz from Brazilian sediments and constraints for OSL dating

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Guedes, Carlos C. F. [1] ; Sawakuchi, Andre O. [1] ; Giannini, Paulo C. F. [1] ; Dewitt, Regina [2] ; Aguiar, Vitor A. P. [3]
Total Authors: 5
[1] Univ Sao Paulo, Inst Geociencias, Dept Geol Sedimentar & Ambiental, BR-05508080 Sao Paulo - Brazil
[2] E Carolina Univ, Dept Phys, Greenville, NC 27858 - USA
[3] Univ Sao Paulo, Inst Fis, BR-05508090 Sao Paulo - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Anais da Academia Brasileira de Ciências; v. 85, n. 4, p. 1303-1316, DEC 2013.
Web of Science Citations: 6

This study analyzes the optically stimulated luminescence (OSL) characteristics of quartz grains from fluvial, eolian and shallow marine sands of northeastern and southeastern Brazil, with especial focus on the applicability of the single-aliquot regenerative dose (SAR) dating protocol. All analyzed Brazilian sediments presented relatively high OSL sensitivity and good behavior regarding their luminescence characteristics relevant for radiation dose estimation. However, some samples from the Lençóis Maranhenses region in northeastern Brazil showed inadequate OSL sensitivity correction, hampering the implementation of the SAR protocol and their ability to behave as a natural dosimeter. While the shallow marine and eolian samples showed a narrow and reliable dose distribution, the fluvial sample had a wide dose distribution, suggesting incomplete bleaching and natural doses estimates dependent on age models. (AU)

FAPESP's process: 09/10521-2 - Cronology and sedimentology of the Quaternary aeolian deposist of Maranhão east coast
Grantee:Carlos Conforti Ferreira Guedes
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 07/51511-4 - Quaternary sedimentary evolution of Ilha Comprida, São Paulo state
Grantee:Carlos Conforti Ferreira Guedes
Support Opportunities: Scholarships in Brazil - Master