| DOI: | 10.1016/j.palaeo.2014.07.023
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| 论文题名: | Laser ablation U-series analysis of fossil bones and teeth |
| 作者: | Grün R.; Eggins S.; Kinsley L.; Moseley H.; Sambridge M.
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| 刊名: | Palaeogeography, Palaeoclimatology, Palaeoecology
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| ISSN: | 0031-0182
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| 出版年: | 2014
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| 卷: | 416 | | 起始页码: | 150
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| 结束页码: | 167
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| 语种: | 英语
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| 英文关键词: | Callao
; Garba III Melka Kunture
; Human fossils
; Laser ablation analysis
; U-series dating
; Wajak
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| 英文摘要: | Over the past decade, we have applied laser ablation ICP mass spectrometry U-series analysis to a large number of bones and teeth. The method is fast and provides high-resolution data of U-series isotopes, which give insights into the complexity of uranium migration into, within and out of bones. In this paper, we present our laser ablation approach in detail, from the experimental set up, to data reduction and uranium diffusion modelling. Laser ablation analysis can now be applied with minimum damage. Complete diffusion data sets can be obtained by laser drilling which leaves a hole of around 200. μm in diameter and 1-2. mm depth. If the natural U-diffusion follows a simple single-stage process, valuable age information can be obtained. In other cases, highly complex U-migrations have been observed, which make any age assessment impossible. Two examples from Wadjak and Callao illustrate the potential of nearly non-destructive laser ablation U-series analysis of human skeletal tissues. The results demonstrate the physical presence of modern humans in south-east Asia at a time when our species just started to migrate into Europe. © 2014. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/69146
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| Appears in Collections: | 过去全球变化的重建
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作者单位: | Research School of Earth Sciences, The Australian National University, Canberra, ACT, Australia
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| Recommended Citation: | |
Grün R.,Eggins S.,Kinsley L.,et al. Laser ablation U-series analysis of fossil bones and teeth[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2014-01-01,416
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