High-resolution Chronology of Humic Soil and Peat Layer Established by Tephra Layers and Radiocarbon Dates

由火山灰层和放射性碳数据建立的腐殖土和泥炭层的高分辨率年代学

• 批准号: 17500712
• 负责人: OKUNO Mitsuru
• 金额: $ 1.98万
• 依托单位: Fukuoka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-17500712/
• 关键词: Volcano; Accelerator; Environmental Change; Soilsphere Phenomena; Dating; 土場圏現象; 土壌圏現象

Radiocarbon dates for soil and peat layers are seemed to be not reliable because of a suspicious of closed system. However, these samples are very useful for reconstructing paleo-environmental change. This study is considered by not only radiocarbon dates but also vertical change of carbon and nitrogen contents and deposit density. We try to distinguish deposition and accumulation of organic material, and establish interpretation of radiocarbon dates for these deposits in high-resolution.Subjects of investigation in this study are not only eruptive history of volcano but also glacier variation and sea level changes. Buried soil in and around Mayon Volcano (Philippines), Adak Island (USA), Ulleung Island (South Korea), Hakone Volcano, Unzen Volcano and Kirishima Volcano aredatedwithacceleratormassspectrometry(AMS).Theseeruptivehistorieshavebeen refined. Identification of bubble-wall type glass shards is very important for recognition of deposition age of widespread tephra at soil and peat sections. Because radiocarbon dates can be determined by comparing with age of widespread tephra. Radiocarbon dates from alluvial deposits in Kumamoto plane and Rarotonga Island (Cook Islands) reveal changes in sea level and coastal environments. Glacier variation in Kyrgyz Republic is also determined. Consequently, soil and peat material is widely applicable for chronological studies.

由于对封闭系统的怀疑，土壤和泥炭层的放射性碳测年似乎并不可靠。然而，这些样品对于恢复古环境变化是非常有用的。这项研究不仅考虑了放射性碳测年，还考虑了碳、氮含量和沉积密度的垂直变化。我们试图区分有机质的沉积和堆积，并建立这些沉积物的高分辨率放射性碳年代学解释。本研究的研究对象不仅是火山喷发历史，还包括冰川变化和海平面变化。马荣火山(菲律宾)、阿达克岛(美国)、蔚亮岛(韩国)、箱根火山、云顶火山和麒麟岛火山及其周围埋藏的土壤aredatedwithacceleratormassspectrometry(AMS).Theseeruptivehistorieshavebeen得到了提炼。泡壁型玻璃碎屑的识别对于识别广泛存在于土壤和泥炭剖面上的火山灰沉积时代具有重要意义。因为放射性碳的年代可以通过与广泛分布的火山灰的年代进行比较来确定。来自熊本岛和拉罗通加岛(库克群岛)冲积沉积物的放射性碳测年揭示了海平面和沿海环境的变化。吉尔吉斯共和国的冰川变化也被确定。因此，土壤和泥炭材料广泛适用于年代学研究。

项目成果

The 7.3 cal kyr BP eruption in Kikai caldera : a role of basaltic magma and crustal stress

Kikai 火山口的 7.3 cal kyr BP 喷发：玄武岩浆和地壳应力的作用

• 发表时间: 2006
• 期刊: Bulletin of the Volcanological Society of Japan 51
• 作者: Tetsuo Kobayashi

Eruptive history of Ohachi Volcano, Kirishima Volcano Group, southern Kyushu, Japan

日本九州南部雾岛火山群大八火山的喷发历史

• 发表时间: 2007
• 期刊: Bulletin of the Volcanological Society of Japan 52
• 作者: Mirabueno;M.H.T.;Masaaki Tsutsui
• 通讯作者: Masaaki Tsutsui

Chronological Research on Volcanic Activities in Luzon Island in the Philippines by Thermoluminescence and Radiocarbon Methods

热释光和放射性碳方法对菲律宾吕宋岛火山活动的年代学研究

• 发表时间: 2007
• 期刊: Summaries of Researches using AMS at Nagoya University XVIII
• 作者: Mirabueno;M.H.T.;Masaaki Tsutsui;Mitsuru Okuno
• 通讯作者: Mitsuru Okuno

AMS Radiocarbon dating of a charcoal fragment from the Irosin Ignimbrite, Sorsogon Province, Southeastern Luzon, Philippines

菲律宾吕宋岛东南部索索贡省 Irosin Ignimbrite 木炭碎片的 AMS 放射性碳测年

• 发表时间: 2007
• 期刊: Bulletin of the Volcanological Society of Japan 52(in press)
• 作者: Mirabueno;M.H.T.
• 通讯作者: M.H.T.

The Owakidani Tephra Group : A Newly Discovered Post-magmatic Eruption Product of Hakone Volcano, Japan

大涌谷火山灰群：日本箱根火山新发现的岩浆喷发后产物

• 发表时间: 2006
• 期刊: The Memoiirs of Geological Society of Japan 59
• 作者: Ota;Y.;Makabe;R.;Hattori;H;Sampei;M;Tanimura;A;Sasaki;H.;Makoto Kobayashi
• 通讯作者: Makoto Kobayashi