Research for the volcanic activity of Fuji Volcano, based on the tephrostratigraphy of lake sediments from Lake Yamanaka, central Japan

基于日本中部山中湖沉积物的地层学研究富士火山的火山活动

• 批准号: 13480121
• 负责人: UCHIYAMA Takashi
• 金额: $ 8.64万
• 依托单位: Yamanashi Institute of Environmental Sciences
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 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/en/grant/KAKENHI-PROJECT-13480121/
• 关键词: Fuji Volcano; Lake Yamanaka; Lake sediments; Tephrastratigraphy; long-term volcanic activity Disaster mitigation; Hazard map; Qurternary stratigraphy; 第四紀地質; 火山活動史; 防災; 噴火の影響; 第四紀層序; 第四紀

This research was carried out to make the volcanic activity and eruption history of Fuji volcano to reach over the past several ten thousand based on the tephrastratigraphy of the lake bottom sediments, YA-1 and 2 cores collected from Yamanaka Lake clear. Microfossil analysis was done together, and cleared as for the influence of the eruption activities as well.Those characteristics were explained, and correlation with the tephra distributed in the land part was done about the tephra in YA-1, 2 cores. This result revealed that there was partly an unconfirmed tephra. As the widespread volcanic ashes, it was found that tephra in YA-1 core about 7.4m in depth correlated to Kg, and tephra in YA-1 core, 11.8m depth and YA-2 core, 6m depth done to K-Ah, too. Based on carbon fourteen dating and tephrastratigraphy, scoria layer in YA-1 core, 0.8m in depth correlated to Hoei scoria in 1707AD.Microfossil analysis, as pollen fossil, phytolith and so on, were done by using the core of YA-1 collected from center of Yamanaka Lake to explain impact of the volcanic eruption. Though the remarkable influence of the volcanic eruption couldn't be read as yielded rich arboreal pollen, wood floor was damaged due to increasing and decreasing of the non arboreal pollen and spore analysis in tephra falling.These results seem to contribute the preparation of the volcanic disaster map and the foundation materials in protection against disasters.

根据山中湖YA-1和YA-2岩心湖底沉积物的火山岩地层学资料，对富士火山数万年来的火山活动和喷发历史进行了研究。对YA-1、YA-2柱样的火山灰进行了微体化石分析，明确了火山喷发活动的影响，解释了这些特征，并与分布在陆地部分的火山灰进行了对比。这一结果表明，有一部分未经证实的火山灰。由于广泛分布的火山灰，发现YA-1孔7.4m左右的火山灰与Kg有关，YA-1孔11.8m和YA-2孔6 m左右的火山灰与K-Ah有关。通过碳十四定年和火山岩地层学研究，将YA-1岩心中0.8m深的火山渣层与1707年的会理火山渣层进行了对比。利用山中湖中心YA-1岩心中的花粉化石、植硅石等微体化石分析，解释了火山喷发的影响。火山喷发的显著影响虽然不能解释为产生了丰富的乔木花粉，但由于火山灰下落中非乔木花粉和孢子分析的增加和减少，木地板受到了破坏，这些结果可能有助于火山灾害图的编制和防灾的基础资料。

项目成果

輿水達司: "富士山の生いたちを探る.日本遺産第6号(富士山)"朝日新聞社. 8-11 (2002)

小清水达司：“探索富士山的生活。日本遗产第 6 号（富士山）”《朝日新闻》8-11（2002 年）。

輿水達司, 山内 高: "富士山北麓のボーリングコアの層序および湖の環境変遷史"地球惑星科学関連学会2003年合同大会予稿集. (CD-ROM). Q042-Q007 (2003)

Tatsuji Koshimizu、Takashi Yamauchi：“富士山北麓钻孔岩心的地层学和湖泊环境变化的历史”2003 年地球与行星科学相关学会联合会议论文集（CD-ROM）。 (2003)

輿水達司, 内山 高, 吉澤一家編: "富士五湖周辺の自然環境変遷史に関する研究"山梨県環境科学研究所研究報告書. 8. 1-88 (2003)

小清水达司、内山隆、吉泽家族（编）：《富士五湖周边自然环境变迁史研究》山梨县环境科学研究所研究报告书8. 1-88（2003年）。

UCHIYAMA, Takashi: "On the Volcanic Hazard Map from a view of long-term volcanic activity"Daishiki. 34. 1-8 (2002)

内山隆：“从长期火山活动的角度看火山灾害图”Daishiki。

輿水達司, 内山高, 吉澤一家: "富士五湖周辺の自然環境変遷史に関する研究"山梨県環境科学研究所研究報告書. 8. 1-88 (2003)

小清水龙二、内山隆、吉泽家族：《富士五湖周边自然环境变迁史研究》山梨县环境科学研究所报告书 8. 1-88 (2003)。