Studies on Quaternary crustal movements and volcanic activities of gigantic calderas

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K01166
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Geography
• Research Institution: Kagoshima University
• Principal Investigator: Moriwaki Hiroshi 鹿児島大学, 法文教育学域法文学系, 名誉教授 (70200459)
• Co-Investigator(Kenkyū-buntansha): 奥野 充 福岡大学, 理学部, 教授 (50309887) ; 田中 源吾 金沢大学, 国際基幹教育院, 助教 (50437191) ; 小林 善仁 鹿児島大学, 法文教育学域法文学系, 准教授 (80594358) ; 吉田 明弘 鹿児島大学, 法文教育学域法文学系, 准教授 (80645458)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 姶良カルデラ / 阿多カルデラ / 臨海平野 / 地殻変動 / テフラ / 完新世 / 鹿児島湾 / 南九州

Outline of Final Research Achievements

Kagoshima Bay of southern Kyushu in south Japan consists of gigantic calderas. Remnants of past sea levels indicating datum plane of crustal movements occur on the coastal plains around the Bay, providing most suitable data for examining crustal movements of those calderas and volcanic activities. Upwarping in the Holocene has been hitherto suggested in Aira caldera forming the head of the Bay. In this study, we examined the background of the Holocene uplift of Aira caldera on the basis of the chronology of landforms, deposits of the coastal plains on the central and southern parts of Kagoshima Bay, using bore hole drilling, tephra analyses and C-14 measurements. As a result, conspicuous uplift like Aira caldera is not recognized in these areas. The upwarping of Aira caldera in the Holocene is unique in southern Kyushu, suggesting to be closely related to volcanic activities of Aira caldera.

Free Research Field

自然地理学，地形学，火山灰編年学