Calibration of AMS C-14 ages prior to 20,000 years B.P. or more, using Fission Track ages of burnt obsidians
| Project/Area Number |
14380050
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Cultural property science
|
|---|
| Research Institution | Rikkyo University |
|---|
Principal Investigator |
SUZUKI Masao Rikkyo University, Department of Contemporary Culture and Society College of Social Relations, Professor, 社会学部・現代文化学科, 教授 (10062655)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
NAKAMURA Toshio Nagoya University, Center for Chronological Research, 年代測定総合研究センター, 教授 (10135387)
北川 浩之 名古屋大学, 大学院・環境学研究科, 助教授 (00234245)
鈴木 達郎 鹿児島大学, 教育学部, 教授 (70136828)
鶴丸 俊明 札幌学院大学, 人文学部, 助教授 (50188645)
安蒜 政雄 明治大学, 文学部, 教授 (00183153)
|
|---|
| Project Period (FY) |
2002 – 2003
|
| Project Status |
Completed (Fiscal Year 2003)
|
| Budget Amount *help |
¥5,900,000 (Direct Cost: ¥5,900,000)
Fiscal Year 2003: ¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 2002: ¥4,000,000 (Direct Cost: ¥4,000,000)
|
|---|
| Keywords | obsidian / burnt obsidian / FT dating method / AMS C-14 dating method / charcoal / calibration / AMSC-14 / FT / EDXRF / INAA / LA / ICP-MS / Obsidian Summit / フィッショントラック / ITP条件 / ITPFT / 考古学的被熱黒曜石 / AMS C-14 / Tandetron |
|---|
| Research Abstract |
The purpose of this research is to examine the degree and tendencies of the discordance of measured ages by two dating techniques (AMS C-14, FT) of the sample (charcoal and burnt obsidian, respectively) of simultaneous derivation. However, mostly because of the difficulties in FT dating, we couldn't obtain sufficient results.
The Nagano series obsidians were glass-clear quality, and gave FT ages with 5% counting errors. However, the association status of charcoal and burnt obsidian depends on the third level of reliance (stratigraphic).
To overcome these difficulties, the Hokkaido series obsidians were added. Their association status was second level (archaeological). However, due to fission-track-like etch pits derived from crystalline properties, and the small size of the specimens, it was difficult to obtain reliable and reproducible FT ages.
As a result, we couldn't calculate conversion factors for AMS C-14 versus FT ages.
Especially in the case of Hokkaido series, S/N (signal/noise) ratios were extremely low - beyond the limits of human vision?
Therefore, research like this should be oriented for, as a first step, automatic and instrumental FT measurement that is urgently required.
We have published papers and reports, including an oral presentation in a related field, all of which have been collated in the booklet report.
|
Report
(3 results)
Research Products
(8 results)
-
-
-
-
-
-
-
[Publications] Nakamura, T., Takada, H., Niu, E., Oda, H.: "Marine reservoir effect deduced from 14C dates on marine shells and terrestrial plants at Mawaki archeological site facing sea of Japan"Abstracts of 18th radiocarbon Conference, held from September 1 to 5,2003,at Wellington, New Zealand. XV. 262 (2004)
-
