OSL dating results of post-Barreiras sediments in the Paraiba basin, Northeastern Brazil
Creators
- 1. Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)
- 2. Faculdade de Tecnologia de Sao Paulo (FATEC-SP/CEETEPS), Laboratorio de Datacao e Luminescencia de Cristais, Sao Paulo, SP (Brazil)
- 3. Instituto Nacional de Pesquisas Espaciais (INPE), Sao Jose dos Campos, SP (Brazil). Centro de Observacao da Terra, Divisao de Sensoriamento Remoto - DSR
Description
In the present study we show ages of 39 sediments samples of two sedimentary units (PB1 and PB2) collected from Paraiba Basin, northeastern Brazil, obtained by optically stimulated luminescence (OSL) making use of standardized growth curve (SGC) and applying single aliquot regenerative dose (SAR) protocol in 15 randomly selected samples to validate the equivalent Dose (De). Environmental radiation dosimetry of the area was performed to evaluate the natural concentrations of 238U, 232Th and 40K and in this way annual dose rates of the locations were evaluated. The results showed natural radioisotopes concentrations between 0.542-4.879 ppm for U, 1.314-26.098 ppm for Th and 0.141-1.12% for K and annual dose rates between 439-4172μGy/yr. The ages ranged from 1.8-178.3 kyr were obtained, and they are in agreements with the geological considerations. (author)
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Additional details
Publishing Information
- Imprint Pagination
- 11 p.
- Report number
- INIS-BR--11311
Conference
- Title
- International nuclear atlantic conference. Nuclear energy: new jobs for a better life; 17. ENFIR: Meeting on nuclear reactor physics and thermal hydraulics; 10. ENAN: Meeting on nuclear applications; 2. ENIN: Meeting on nuclear industry
- Acronym
- INAC 2011
- Dates
- 24-28 Oct 2011
- Place
- Belo Horizonte, MG (Brazil)
INIS
- Country of Publication
- Brazil
- Country of Input or Organization
- Brazil
- INIS RN
- 43056422
- Subject category
- S54: ENVIRONMENTAL SCIENCES; S61: RADIATION PROTECTION AND DOSIMETRY;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- DOSIMETRY; ENVIRONMENTAL EXPOSURE; ENVIRONMENTAL MATERIALS; IONIZING RADIATIONS; LYOLUMINESCENCE; RADIATION DETECTION; RADIATION MONITORING; SEDIMENTS; THORIUM 232; URANIUM 238
- Descriptors DEC
- ACTINIDE NUCLEI; ALPHA DECAY RADIOISOTOPES; CHEMICAL RADIATION EFFECTS; DETECTION; EMISSION; EVEN-EVEN NUCLEI; HEAVY NUCLEI; ISOTOPES; LUMINESCENCE; MATERIALS; MONITORING; NUCLEI; PHOTON EMISSION; RADIATION EFFECTS; RADIATIONS; RADIOISOTOPES; SPONTANEOUS FISSION RADIOISOTOPES; THORIUM ISOTOPES; URANIUM ISOTOPES; YEARS LIVING RADIOISOTOPES