Dating stalagmite from caverna do diabo (devil’s cave) by TL and EPR techniques

Shigueo Watanabe; Nilo Francisco Cano; T. K. Gundu Rao; Betzabel N. Silva-Carrera; Lucas S. Carmo; Antonio J.A. Quina; Roseli F. Gennari; Casimiro S. Munita; Jorge Sabino Ayala Arenas; Bruno G. Fernandes

doi:10.1590/0001-3765201620150755

Dating stalagmite from caverna do diabo (devil’s cave) by TL and EPR techniques

Shigueo Watanabe, Nilo Francisco Cano, T. K. Gundu Rao, Betzabel N. Silva-Carrera, Lucas S. Carmo, Antonio J.A. Quina, Roseli F. Gennari, Casimiro S. Munita, Jorge Sabino Ayala Arenas, Bruno G. Fernandes

Departamento Académico de Física

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

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 CO^-₂, and CO^-₃ and CO^3-₃, 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 stalagmite were determined from the D_ac-values and D_an-value, obtaining an average of 86410 for central slice, 53421 for second slice, 31490 for third slice and 46390 years B.P. for the central region of upper end.

Original language	English
Pages (from-to)	2137-2142
Number of pages	6
Journal	Anais da Academia Brasileira de Ciencias
Volume	88
Issue number	4
DOIs	https://doi.org/10.1590/0001-3765201620150755
State	Published - 2016

Bibliographical note

Funding Information:
The authors wish to thank Ms. E. Somessari and Mr. C. Gaia, Instituto de Pesquisas Energeticas e Nucleares (IPEN), Brazil, for kindly carrying out the irradiation of the samples. To Funda??o de Amparo ? Pesquisa do Estado de S?o Paulo (FAPESP, Process number 2014/03085-0) for partial financial support and to Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES, Process number BEX-9612130) for fellowship to T.K. Gundu Rao.

Publisher Copyright:
© 2016, Academia Brasileira de Ciencias. All rights reserved.

Keywords

Caverna do diabo
Dating
EPR
Stalagmite
TL

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title = "Dating stalagmite from caverna do diabo (devil{\textquoteright}s cave) by TL and EPR techniques",

abstract = "A cylindrical fragment of stalagmite from Caverna do Diabo, State of S{\~a}o 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 CO-2, and CO-3 and CO3-3, 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 stalagmite were determined from the Dac-values and Dan-value, obtaining an average of 86410 for central slice, 53421 for second slice, 31490 for third slice and 46390 years B.P. for the central region of upper end.",

keywords = "Caverna do diabo, Dating, EPR, Stalagmite, TL",

author = "Shigueo Watanabe and Cano, {Nilo Francisco} and {Gundu Rao}, {T. K.} and Silva-Carrera, {Betzabel N.} and Carmo, {Lucas S.} and Quina, {Antonio J.A.} and Gennari, {Roseli F.} and Munita, {Casimiro S.} and {Ayala Arenas}, {Jorge Sabino} and Fernandes, {Bruno G.}",

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AU - Watanabe, Shigueo

AU - Cano, Nilo Francisco

AU - Gundu Rao, T. K.

AU - Silva-Carrera, Betzabel N.

AU - Carmo, Lucas S.

AU - Quina, Antonio J.A.

AU - Gennari, Roseli F.

AU - Munita, Casimiro S.

AU - Ayala Arenas, Jorge Sabino

AU - Fernandes, Bruno G.

PY - 2016

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N2 - 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 CO-2, and CO-3 and CO3-3, 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 stalagmite were determined from the Dac-values and Dan-value, obtaining an average of 86410 for central slice, 53421 for second slice, 31490 for third slice and 46390 years B.P. for the central region of upper end.

AB - 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 CO-2, and CO-3 and CO3-3, 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 stalagmite were determined from the Dac-values and Dan-value, obtaining an average of 86410 for central slice, 53421 for second slice, 31490 for third slice and 46390 years B.P. for the central region of upper end.

KW - Caverna do diabo

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JO - Anais da Academia Brasileira de Ciencias

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ER -

Dating stalagmite from caverna do diabo (devil’s cave) by TL and EPR techniques

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Keywords

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