A study of determining the tree-ring age with a precision of one year by 14C wiggle matching

14C摆动匹配一年精度测定树木年轮年龄的研究

基本信息

批准号：
16320108
负责人：
NAKAMURA Toshio
金额：
$ 9.47万
依托单位：
Nagoya University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2006
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16320108/
关键词：
radiocarbon accelerator mass spectrometry tree ring radiocarbon dating tree-ring age wiggle matching Yaku-sugi tree Changbaishan 長白山火山

项目摘要

This research aims to investigate the possibility of determining the age of annual ring for a wood sample excavated from archeological sites or geological sediments with a precision of one year, by 14C dating of their annual rings with AMS and applying 14C wiggle-matching. We first measured 14C ages of individual annual rings as many as possible that were separated from Japanese cedar trees grown in Yaku Island, Kagoshima, and at Muroji temple, Nara, Japan. The sample trees were dated dendrochronologically in advance.61 annual rings (AD1617-1739) from the Muroji tree, 173 (AD1413-1615) and 78 rings (AD881-1072) from the Yaku-Island tree were 14C dated and their age values are compared with respective 14C values from the internationally accepted IntCa104 14C-age calibration data. The 14C ages were consistent with one another within measurement errors, but a tendency that 14C ages of Japanese trees were older than IntCa104 data for respective annual rings.Next, 55 annual rings (AD1631-1739) from the Muroji tree and 142 rings (AD1413-1554) from the Yaku-Island tree were wiggle-matched to the IntCa104 data. The matching yielded a perfect coincidence of 14C-determined age to dendro-dated one with +/-2 year uncertainty (95% confidence) for the Muroji tree. For the Yaku-island tree, 14C-determined age was older by 4 years than the dendro-dated one with +/-2 year uncertainty. It is clearly suggested that age estimation of a tree is possible with a precision of about one year by wiggle matching if a larger number of annual rings will be dated for the sample tree.We also tried to date the outermost ring of archeological and geological wood samples by wiggle matching, and could conclude that a far better accuracy is obtained by this method than by the ordinary method of 14C dating of only the outermost annual ring of the woods.

这项研究旨在调查从考古遗址或地质沉积物中挖掘出一年的木制样本年度环的可能性，其年度为14C年度与AMS的年度戒指并应用14C旋转的匹配。我们首先测量了14C年龄的年度年度戒指，这些环与在雅库岛（Kagoshima）和日本奈良（Nara）的Muroji Temple种植的日本雪松树（Japesation Cedar）分开。样品树在人工学上的日期提前。61年度环（AD1617-1739）来自Muroji树，173（AD1413-1615）和78枚环（AD881-1072）（AD881-1072），来自Yaku-Island树的年龄为14c的年龄及其年龄的值为14c的intription-Intription-Intriptim in Interniption-intriptim intection-intription-Intription-Intription-Intription-Intriptim ccace ccace ccace ccace ccace caccace caccace caccacy进行了比较。 14c年龄在测量错误中相互一致，但是每年戒指的日本树的14c年龄比Intca104年龄要比INTCA104年龄大。该匹配的年龄为14c确定的年龄，以+/- 2年的不确定性（95％的信心）对Dendro的年龄进行了完美的巧合。对于Yaku-Island树，比+/- 2年不确定性的Dendro年代年龄比Dendro的年龄要比14C确定的年龄大4岁。可以清楚地表明，如果匹配将有大约一年的年龄估计，如果将年的年度数量匹配，则可以为样品树的日期使用大约一年。我们还试图通过wiggle匹配来约会考古和地质木材样品的最外面的环，并且可以通过这种方式可以通过这种方法来获得14c wood的戒指来获得更高的准确性。