Luminescence characteristics of quartz from Brazilian sediments and constraints for OSL dating
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...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Academia Brasileira de Ciências
2013-09-01
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| Series: | Anais da Academia Brasileira de Ciências |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000401303&lng=en&tlng=en |
| _version_ | 1811296457269968896 |
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| author | CARLOS C.F. GUEDES ANDRE O. SAWAKUCHI PAULO C.F. GIANNINI REGINA DEWITT VITOR A.P. AGUIAR |
| author_facet | CARLOS C.F. GUEDES ANDRE O. SAWAKUCHI PAULO C.F. GIANNINI REGINA DEWITT VITOR A.P. AGUIAR |
| author_sort | CARLOS C.F. GUEDES |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-04-13T05:49:45Z |
| format | Article |
| id | doaj.art-ae11212a857040559867cb0afd9d6637 |
| institution | Directory Open Access Journal |
| issn | 1678-2690 |
| language | English |
| last_indexed | 2024-04-13T05:49:45Z |
| publishDate | 2013-09-01 |
| publisher | Academia Brasileira de Ciências |
| record_format | Article |
| series | Anais da Academia Brasileira de Ciências |
| spelling | doaj.art-ae11212a857040559867cb0afd9d66372022-12-22T02:59:50ZengAcademia Brasileira de CiênciasAnais da Academia Brasileira de Ciências1678-26902013-09-018541303131610.1590/0001-37652013104912S0001-37652013000401303Luminescence characteristics of quartz from Brazilian sediments and constraints for OSL datingCARLOS C.F. GUEDESANDRE O. SAWAKUCHIPAULO C.F. GIANNINIREGINA DEWITTVITOR A.P. AGUIARThis 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.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000401303&lng=en&tlng=enDatacao por luminescencia opticamente estimulada (LOE)protocolo de datacao por aliquota unica (SAR)sensibilidade LOEsedimentos arenosos brasileiros |
| spellingShingle | CARLOS C.F. GUEDES ANDRE O. SAWAKUCHI PAULO C.F. GIANNINI REGINA DEWITT VITOR A.P. AGUIAR Luminescence characteristics of quartz from Brazilian sediments and constraints for OSL dating Anais da Academia Brasileira de Ciências Datacao por luminescencia opticamente estimulada (LOE) protocolo de datacao por aliquota unica (SAR) sensibilidade LOE sedimentos arenosos brasileiros |
| title | Luminescence characteristics of quartz from Brazilian sediments and constraints for OSL dating |
| title_full | Luminescence characteristics of quartz from Brazilian sediments and constraints for OSL dating |
| title_fullStr | Luminescence characteristics of quartz from Brazilian sediments and constraints for OSL dating |
| title_full_unstemmed | Luminescence characteristics of quartz from Brazilian sediments and constraints for OSL dating |
| title_short | Luminescence characteristics of quartz from Brazilian sediments and constraints for OSL dating |
| title_sort | luminescence characteristics of quartz from brazilian sediments and constraints for osl dating |
| topic | Datacao por luminescencia opticamente estimulada (LOE) protocolo de datacao por aliquota unica (SAR) sensibilidade LOE sedimentos arenosos brasileiros |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000401303&lng=en&tlng=en |
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