Geochemical map of strontium isotope ratio in Japan: a database for tracing of ancient human migration and archeological remains transport

2014 Fiscal Year Final Research Report

• Project/Area Number: 22300308
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Cultural property science
• Research Institution: Nagoya University
• Principal Investigator: MINAMI Masayo 名古屋大学, 年代測定総合研究センター, 准教授 (90324392)
• Co-Investigator(Kenkyū-buntansha): OHTA Atsuyuki 独立行政法人産業技術総合研究所, 研究員 (30356638) ; ASAHARA Yoshihiro 名古屋大学, 大学院環境学研究科, 助教 (10281065) ; MIYATA Yoshiki 名古屋大学, 年代測定総合研究センター, 非常勤研究員 (70413896) ; YAMAMOTO Koshi 名古屋大学, 大学院環境学研究科, 教授 (70183689)
• Research Collaborator: JOMORI Yuka 名古屋大学, 大学院環境学研究科
• Project Period (FY): 2010-04-01 – 2015-03-31
• Keywords: ストロンチウム同位体比 / 地球化学図 / 河川堆積物 / 来歴判別

Outline of Final Research Achievements

We cariied out a basic research for geochemical mapping of Sr isotope ratio, which is needed for multiple purposes such as detection of food-producing areas, tracing of patterns of ancient human migration, and culture change in earlier times. First, we revealed that 1) catchment outlet stream sediment (particle size of <180μm) is most suitable as a sample for mapping of Sr isotope ratio, and then that 2) Sr isotope ratio of Bulk Sr in stream sediment reflects that of parent rock and soil around the stream, while Sr isotope ratio of Exchangeable Sr in stream sediment reflects that of water and biological samples of vegetation and fauna growing around the stream. Based on the results, we have completed a nationwide geochemical map of Sr isotope ratio by Sr isotope ratio measurement of 1084 samples of stream sediment in Japan.

Free Research Field

同位体地球化学