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

被引：14
作者：
Guedes, Carlos C. F. [1 ]
Sawakuchi, Andre O. [1 ]
Giannini, Paulo C. F. [1 ]
Dewitt, Regina [2 ]
Aguiar, Vitor A. P. [3 ]
机构：
[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
来源：
ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS | 2013年 / 85卷 / 04期
基金：
巴西圣保罗研究基金会;
关键词：
optically stimulated luminescence (OSL) dating; Single-Aliquot Regenerative-Dose protocol (SAR); OSL sensitivity; Brazilian sands; SEA-LEVEL; DEPOSITS; INTENSITY; SITE;
D O I：
10.1590/0001-37652013104912
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
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 Lencois 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.
引用
收藏
页码：1303 / 1316
页数：14
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