Study on the Late Quaternary Glaciations in the Hidaka Mountains, Hokkaido, Japan

日本北海道日高山脉晚第四纪冰川作用研究

基本信息

批准号：
13680098
负责人：
WATANABE Teiji
金额：
$ 2.18万
依托单位：
Hokkaido University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2003
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13680098/
关键词：
Glaciation Quaternary Mountain permafrost Hokkaido Hidaka Mountains Northern Japanese Alps 第四期

项目摘要

This study investigated spatial distribution and stratigraphy of glacial landforms, glacial sediments and marker tephras in the Hidaka Mountains, Hokkaido, Japan. Particularly, the present geological processes and climatological conditions in the alpine regions are paid attention to apply their features to reconstruct glacial and periglacial environments during the last glacial period. In addition, precise chronology of the glaciations in the Hidaka Mountains was investigated using some key marker tephras. The glacial and periglacial conditions in the Japanese high mountains were discussed comparing with several legions in Switzerland and Canada, wheie typical present examples are distributed.Microstructures of glacial sediments obtained from the field were analyzed to reconstruct the former subglacial condition in the Hidaka Mountains. As a result, it is strongly suggested that a deformable unconsolidated sediment layer and an underlying fiozen layer might be existed beneath the ice mass during the last glaciation.We also have successed the first measurement of the present air and ground temperatures at the summit area of the Hidaka Mountains through a year. According to the ground temperature regime, active permafrost is confirmed in this region. These data allow us to discuss not only the present state but also the pareo-environment in the high mountain ranges in Hokkaido.

这项研究调查了日本北海道的希达卡山脉的冰川地形，冰川沉积物和标记Tephras的空间分布和地层。特别是，在上一个冰川期间，请注意高山地区目前的地质过程和气候条件，以将其特征应用于重建冰川和周冰环境。此外，使用一些关键标记Tephras研究了希达卡山脉冰川的精确年代。讨论了日本高山的冰川和周冰条件，与瑞士和加拿大的几个军团进行了比较，分布了典型的现有示例。分析了从该场获得的冰川沉积物的微结构，以重建希达卡山脉中的前次冰层。结果，强烈建议在最后一个冰川期间，可能存在可变形的非固定沉积物层和下层的小叶层。我们还成功地测量了当前空气和地面温度的首次测量。希达卡山（Hidaka Mountains）一年。根据地面温度状态，该区域确认了活跃的多年冻土。这些数据使我们不仅可以讨论当前的状态，而且可以讨论北海道高山范围的pareo-invrientment。