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ESR dating of a toxodon tooth from a Brazilian karstic cave

被引：38
作者：
Baffa, O [1 ]
Brunetti, A
Karmann, I
Neto, CMD
机构：
[1] Univ Sao Paulo, FFCLRP, Dept Fis & Matemat, BR-14040901 Ribeirao Preto, SP, Brazil
[2] Univ Sassari, Dept Fis, I-07100 Sassari, Italy
[3] Univ Sao Paulo, Inst Geociencias, Dept Geol Geral, Ribeirao Preto, SP, Brazil
来源：
APPLIED RADIATION AND ISOTOPES | 2000年 / 52卷 / 05期
关键词：
D O I：
10.1016/S0969-8043(00)00093-2
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
A pre-molar of a Toxodon platensis (sp), a large mammal that inhabited the forests of Southeast Brazil during quaternary times, was dated by electron spin resonance (ESR). Enamel and dentine were separated giving the following archeological doses (AD): (4.0 +/- 0.8) and (11 +/- 2) Gy, respectively. This difference was explained by the higher content of Uranium in dentine (25.1 +/- 0.3) ppm as compared to enamel (0.37 +/- 0.03) ppm. Taking account of the internal dose contribution to the AD, the age obtained is (6.7 +/- 1.3) ky BP for dentine and (5.0 +/- 1.6) ky BP for enamel. (C) 2000 Elsevier Science Ltd. All rights reserved.
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页码：1345 / 1349
页数：5
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