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Dendrochronological Research on a Relation Between the Trees from the Botton of the Ashinoko Lake and the Great

芦之湖湖底树木与大树关系的树木年代学研究

基本信息

批准号：
09480086
负责人：
MITSUTANI Takumi
金额：
$ 5.89万
依托单位：
NARA NATIONAL COLTURAL PROPERTIES RESEARCH INSTITUTE
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

项目摘要

We took 17 samples from the Ashinoko Lake in 1997,1998. As they lost their sapwoods, we couldn't measure their accurate dates of the death of the trees. The result of the chronology consisted of 2 groups; one was about 500 AD., the other was 1000 AD. Estimating the tree rings of the lost sapwoods, the seasoned date of the former group was about 600 AD., the latter one was in about 1100 AD.. According to the old records, the great earthquakes occurred in 599 and 1096. We had a conclusion that the big trees grown on the steep slope were moved into the bottom of the Lake by landslide because of the earthquakes. Then such trees were sank into the bottom of the Lake. they look like inverted from the boat on the lake.Based on these researches , we think that the great earthquakes attacked this area had a cycle of about 500 years. And the result of the chronology using 14 C (about 350AD., and 900 AD.) was about 200 years earlier than using dendrochronology. We can crosscheck the reliability of the chronology using 14C. We believe that this research must be very helpful chronological information for predicting a future earthquake in this area.Now we are being involved in analyzing the tree rings of Chamaecyparis obtusa Endl. buried in the mud of Kamiyama Mt.. When this analysis is completed, we can clear the birth date of the Ashinoko Lake.

1997年和1998年，我们从阿辛诺科湖采集了17个样本。由于他们失去了边材，我们无法测量他们树木死亡的准确日期。年表结果分为两组，一组约为500年，另一组为1000年。估测失落边材的年轮，前者的成熟日期约为公元600年，后者约为公元1100年。根据旧的记录，大地震发生在公元599年和1096年。我们得出结论，生长在陡坡上的大树是由于地震而被滑坡移到湖底的。然后，这样的树被沉入湖底。根据这些研究，我们认为袭击该地区的大地震大约有500年的周期。用14C(约公元350年和公元900年)年代学的结果。比使用树状年代学早了大约200年。我们可以用14C交叉核对年表的可靠性。我们相信，这项研究对于预测该地区未来的地震一定是非常有用的年代学信息。现在，我们正在对树轮进行分析。埋在神山的泥浆里。当这项分析完成后，我们就可以确定阿什诺科湖的出生日期了。