Calibration of AMS C-14 ages prior to 20,000 years B.P. or more, using Fission Track ages of burnt obsidians

距今 20,000 年前的 AMS C-14 年龄校准

• 批准号: 14380050
• 负责人: SUZUKI Masao
• 金额: $ 3.78万
• 依托单位: Rikkyo University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14380050/
• 关键词: obsidian; burnt obsidian; FT dating method; AMS C-14 dating method; charcoal; calibration; AMSC-14; FT; EDXRF; INAA; LA; ICP-MS; Obsidian Summit; フィッショントラック; ITP条件; ITPFT; 考古学的被熱黒曜石; AMS C-14; Tandetron

The purpose of this research is to examine the degree and tendencies of the discordance of measured ages by two dating techniques (AMS C-14, FT) of the sample (charcoal and burnt obsidian, respectively) of simultaneous derivation. However, mostly because of the difficulties in FT dating, we couldn't obtain sufficient results.The Nagano series obsidians were glass-clear quality, and gave FT ages with 5% counting errors. However, the association status of charcoal and burnt obsidian depends on the third level of reliance (stratigraphic).To overcome these difficulties, the Hokkaido series obsidians were added. Their association status was second level (archaeological). However, due to fission-track-like etch pits derived from crystalline properties, and the small size of the specimens, it was difficult to obtain reliable and reproducible FT ages.As a result, we couldn't calculate conversion factors for AMS C-14 versus FT ages.Especially in the case of Hokkaido series, S/N (signal/noise) ratios were extremely low - beyond the limits of human vision?Therefore, research like this should be oriented for, as a first step, automatic and instrumental FT measurement that is urgently required.We have published papers and reports, including an oral presentation in a related field, all of which have been collated in the booklet report.

本研究的目的是检验同时衍生样品（分别为木炭和烧成黑曜石）的两种测年技术（AMSC-14，FT）所测年龄的不一致程度和趋势。然而，主要是由于FT测年的困难，我们无法获得足够的结果。长野系列黑曜石是玻璃透明的质量，FT测年的计数误差为5%。但木炭和烧过的黑曜石的组合地位取决于第三个依赖层次（地层），为了克服这些困难，增加了北海道系列黑曜石。他们的协会地位是二级（考古）。然而，由于晶体性质产生的裂变径迹状蚀坑，以及样品的小尺寸，很难获得可靠和可重复的FT年龄。因此，我们无法计算AMS C-14与FT年龄的转换因子。特别是在北海道系列的情况下，S/N（信号/噪声）比非常低，超出了人类视觉的极限。因此，作为第一步，我们的研究应该面向迫切需要的自动和仪器FT测量。我们发表了论文和报告，包括相关领域的口头报告，所有这些都已整理在小册子报告中。

项目成果

木野瀬正典, 赤塚次郎, 小田寛貴, 山本直人, 中村俊夫: "尾張地域の弥生時代・古墳時代の土器に付着した炭化物の放射性炭素年代"名古屋大学加速器質量分析計業績報告書. XV. 18-25 (2004)

Masanori Kinose、Jiro Akatsuka、Hiroki Oda、Naoto Yamamoto、Toshio Nakamura：“尾张地区弥生和古坟时期陶器上的木炭沉积物的放射性碳测年”名古屋大学加速器质谱仪性能报告 18-25 (2004)。

渡辺圭太, 鈴木正男: "黒曜石の水和速度と化学組成の関係について"日本文化財科学会第20回大会(松江)研究発表要旨集. 2-3 (2003)

渡边庆太、铃木正男：“黑曜石水合率与化学成分的关系”第20届日本文化财产学会年会研究报告摘要（松江）2-3（2003年）。

Nakamura, T., Takada, H., Niu, E., Oda, H.: "Marine reservoir effect deduced from 14C dates on marine shells and terrestrial plants at Mawaki archeological site facing sea of Japan"Abstracts of 18th radiocarbon Conference, held from September 1 to 5,2003,

Nakamura, T.、Takada, H.、Niu, E.、Oda, H.：“根据 14C 日期对面向日本海的 Mawaki 考古遗址的海洋贝壳和陆地植物推断出的海洋储层效应”第 18 届放射性碳会议摘要

Suzuki, M.: "An approach to the palaeoclimatic reconstruction using obsidian hydration as a temperature indicator"Proceedings of the Melos International Workshop. 11-12 (2003)

Suzuki, M.：“使用黑曜石水合作为温度指示器进行古气候重建的方法”Melos 国际研讨会论文集。

Ambrose, W., Stevenson, C., Suzuki, M.: "Current trends of obsidian studies in the Circum-Pacific region"The Bulletin of Meiji University Center for Obsidian and Lithic Studies. 2. 195-208 (2003)

Ambrose, W.、Stevenson, C.、Suzuki, M.：“环太平洋地区黑曜石研究的当前趋势”明治大学黑曜石和石质研究中心公报。