Application of 14C Wiggle-Matching to Support Dendrochronological Analysis in Japan
Application of 14C Wiggle-Matching to Support Dendrochronological Analysis in Japan
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DOI：
10.3959/1536-1098-63.1.37
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发表时间：
2007-06
期刊：
影响因子：
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通讯作者：
T. Nakamura;M. Okuno;K. Kimura;T. Mitsutani;H. Moriwaki;Y. Ishizuka;K. H. Kim;B. Jing;H. Oda;M. Minami;H. Takada
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文献类型：
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作者：
T. Nakamura;M. Okuno;K. Kimura;T. Mitsutani;H. Moriwaki;Y. Ishizuka;K. H. Kim;B. Jing;H. Oda;M. Minami;H. Takada
14C摆动匹配应用于两个与地质和考古事件密切相关的木材样本，并与树木年代学日期相关，以证明加速器质谱（AMS）测定14C年代的准确性。从10世纪白头山火山大喷发沉积的火山碎屑泥石流中挖掘出的烧焦木材与树皮的摆动匹配结果显示，该火山喷发年代约为公元935 +8/−5年，置信度为95%。这一年代与日本白头山火山喷发形成的火山灰落层B-Tm tephra沉积物在地层上有明显联系的两块木板上的树木年代学估计的公元912年至公元972年的喷发年龄相一致。这一日期也与青森县小原湖的碎屑沉积物分析得出的公元937-938年的日期一致。另一块从石川县茂木考古遗址收集的木板，其摆动匹配时间为公元前783 +13/ - 11年，95%的置信度，这与从与木板相同的木结构中获得的7根木杆的公元前830至公元前759年的时间一致。在树木年代学无法使用的情况下，这些结果对于获得准确的木材年代是非常令人鼓舞的。
14C wiggle-matching was applied to two wood samples closely related to geological and archaeological events with associated dendrochronological dates, to demonstrate the accuracy of 14C dating with accelerator mass spectrometry (AMS). Wiggle-matching on charred wood with bark, excavated from a pyroclastic mud-flow deposited by the huge 10th Century eruption of the Baitoushan Volcano, revealed the eruption age as cal A.D. 935 +8/−5 with 95% confidence. This date is consistent with the eruption age of A.D. 912 to A.D. 972 estimated by dendrochronology on two wooden boards that had clear stratigraphical connections to the B-Tm tephra deposit in Japan, an ash fall layer formed by the eruption of the Baitoushan Volcano. The date is also consistent with an A.D. 937–938 date estimated by the analysis of varved sediments from Lake Ogawarako in Aomori prefecture. The other wooden board collected from the Mawaki archaeological site in Ishikawa prefecture was wiggle-matched as 783 +13/−11 cal B.C. with 95% confidence, which is consistent with the dates of 830 cal B.C. to 759 cal B.C. obtained for seven wooden poles from the same wooden structures as the wooden board. These results are highly encouraging for obtaining accurate dates on wood when dendrochronology cannot be used.