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A Study of the Environment Change from Moor Deposits during the Late Pleistocene and Holocene in the Eastern Japan.

日本东部晚更新世和全新世期间沼泽沉积物环境变化的研究。

基本信息

批准号：
04452330
负责人：
SUGIHARA Shigeo
金额：
$ 4.35万
依托单位：
Meiji University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1992
资助国家：
日本
起止时间：
1992 至 1994
项目状态：
已结题

项目摘要

In the mountainous regions in the eastern Japan, there are many moors formed in a topographical environment where blocked with surrounding mountains. These moors are rich in peat or peaty clay. The peaty deposits mainly composed of remains of wetland plants, that had not been completely decomposed. To reconstruct paleo-environmental conditions, at the time of peat deposition, boring was made in various moors in the eastern Japan. Many samples were gathered from peat beds. Then these samples were subjected to identification and correlation of marker tephra, radiocarbon dating, and pollen analysis. This study shows that many of peats can be traced to the last glacial, which is conventionally believed to have been formed in the post glacial. This study produced many findings with respect to changes in the environmental conditions including topography and climate.From 1992 to 1994, studies were conducted in the Jaishi Oike moor in southern part of Izu Peninsula on the Pacific Ocean side, the Yashimagahara moor (Nagano Prefecture) in an inland region, and the Ohsone moor (Fukushima Prefecture), the Naebayama moor (Nagano Prefecture) and the Komatsubara moor (Niigata Prefecture) in areas of heavy snowfall in the districts Japan Sea.In conclusion, the Jaishi Oike moor was formed during the last glacial, and other moors were formed in the Holocene. Based on these studies, we examined the beginning of cold climate in the last glacial and the influence of heavy snowfall to vegetation.

在日本东部的山区，有许多沼泽地形成在地形环境中，与周围的山脉阻隔。这些沼泽地富含泥炭或含泥炭的粘土。泥炭质沉积物主要由未完全分解的湿地植物遗骸组成。为了重建泥炭沉积时的古环境条件，在日本东部的各种沼泽地进行了钻探。许多样品是从泥炭层采集的。对这些样品进行了火山灰、放射性碳年代测定和花粉分析。这项研究表明，许多泥炭可以追溯到末次冰期，这是传统上认为已形成在冰后期。从1992年到1994年，在伊豆半岛南部太平洋一侧的在石大池摩尔沼泽、八岛原摩尔沼泽进行了研究（长野县）在内陆地区，和大根摩尔（福岛县），内松山摩尔（长野县）和小松原摩尔（新泻县）在日本海地区的大雪地区。总之，在石大池摩尔沼泽形成于末次冰期，和其他沼泽形成于全新世。在此基础上，我们考察了末次冰期寒冷气候的开始和大雪对植被的影响。