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Dating stalagmite from Caverna do Diabo (Devil´S Cave) by TL and EPR techniques
Provedor de dados: Anais da Academia Brasileira de Ciências
Autores: WATANABE,SHIGUEO; CANO,NILO F.; RAO,T.K. GUNDU; SILVA-CARRERA,BETZABEL N.; CARMO,LUCAS S.; QUINA,ANTONIO J.A.; GENNARI,ROSELI F.; MUNITA,CASIMIRO S.; AYALA-ARENAS,JORGE S.; FERNANDES,BRUNO G.
ABSTRACT A cylindrical fragment of stalagmite from Caverna do Diabo, State of São Paulo, Brazil, has been studied and dated by thermoluminescence and electron paramagnetic resonance techniques. The thermoluminescence glow curves of stalagmite samples and subsequently gamma irradiated, have shown rise of three peaks at 135, 180 and 265 °C. From electron paramagnetic resonance spectra of stalagmite was possible to clearly identify three paramagnetic centers in the g = 2.0 region: Centers I, II and III are due to , and , respectively. The additive method was applied to calculate the accumulated dose using thermoluminescence peak at 265 °C and the electron paramagnetic resonance signal at g = 1.9973 of CO- 2 radical. The ages of the different slices of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Stalagmite; Caverna do Diabo; Dating; TL; EPR.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000602137