REGIONAL DIFFERENCES OF ARCHEOMAGNETIC FIELD AND THEIR APPLICATION TO THE ARCHEOMAGNETIC AGE DATING

古地磁场的区域差异及其在古地磁年龄测定中的应用

基本信息

批准号：
07831003
负责人：
HIROOKA Kimio
金额：
$ 1.28万
依托单位：
TOYAMA UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1997
项目状态：
已结题

项目摘要

As the archeomagnetic data have been accumulated, it is revealed that there are considerable regional differences in the ancient geomagnetic field within the islands of Japan. The differences are so big that ages obtained by the archeomagnetic dating show errors more than 100 years in the certain period.The aim of the present research is to clalify the regional differences and to establish the standard archeo-secular variation curve for each region in Japan to contribute to the more acculate archeomagnetic age dating.The present research project allowed us accomplishing the standard archeo-secular variation curves for the Hokuriku District and also for the Tokai District. The archeo-secular variation curve for the formar (Hokuriku District) is obtained for a period from 500 A.D.to 1550 A.D.and that for the latter (Tokai District) is for a period of 900-1700 A.D.We obtained archeomagnetic data from the Hokkaido and the Aomori Prefectures where scarce archeomagnetic results are reported. Moreover, we succeeded to obtain archeomagnetic data from Korea. Those will play a very important role to consider and clarify the distribution of the archeomagnetic field and its secular variation in the east Asia.Archeomagnetic measurements were carried out on charcoal kilns which had a close connection with the iron production industry in the ancient times in Hokuriku District. This study revealed that the iron production industies were prosperous not only in the Nara-Heian and the Bakumatsu (the end of Edo Era)-Meiji periods but also in the 12-13th Centuries in the Hokuriku region.

随着考古磁数据的积累，据显示，日本岛上古老的地磁领域存在很大的区域差异。 The differences are so big that ages obtained by the archeomagnetic dating show errors more than 100 years in the certain period.The aim of the present research is to clalify the regional differences and to establish the standard archeo-secular variation curve for each region in Japan to contribute to the more acculate archeomagnetic age dating.The present research project allowed us accomplishing the standard archeo-secular variation curves for the Hokuriku District and also for Tokai区。从公元500年到1550年，获得了格式（Hokuriku District）的Archeo secular变化曲线，而后者（Tokai District）的公元900- 1700年。此外，我们成功地从韩国获得了考古磁数据。这些将发挥非常重要的作用，以考虑和阐明考古磁场的分布及其在东亚的世俗变化。在霍库里库（Hokuriku）地区与古代的铁生产工业之间建立了与铁生产工业的密切联系。这项研究表明，铁生产的企业不仅在纳拉 - 海和巴库马丘斯（江户时代的终结）时期繁荣，而且还繁荣时期 - 米吉时期，而且在霍库里库地区的12-13世纪也是如此。