Chronology of marine terraces after the Middle Pleistocene in northern Japan

2016 Fiscal Year Final Research Report

• Project/Area Number: 26750108
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Geography
• Research Institution: Kogakkan University (2015-2016); Meiji University (2014)
• Principal Investigator: Kondo Reisuke 皇學館大学, 教育開発センター, 准教授 (30409437)
• Research Collaborator: TSUKAMOTO Sumiko ; SAKAMOTO Tatsuhiko ; TAKEMURA Takato ; SATO Masahiko
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 北日本 / 海成段丘面 / 中期更新世 / pIRIR年代測定法 / 地形発達史 / テフラ

Outline of Final Research Achievements

In nothrern Japan, it has been difficult to construct a detailed chronology of marine terraces of the Middle Pleistocene, due to the lack of the marker tephra layers and to the deformation of original landforms by strong past periglaciations. The lack of age constraint has prevented studies of precise geomorphic development and estimation of uplift rates in this area. This study applies a post-IR IRSL (pIRIR) dating to marine terraces in northern Japan.
The results of field survey and experimental data indicate that chorology of marine terraces based on pIRIR ages in several area is different from known ages. These chronological data are important evidence in order to estimate Quaternary crustal movements in northern Japan.

Free Research Field

自然地理学・第四紀学・ルミネッセンス年代測定学・地形学