Achievement of accurate C-14 dating for charcoal based on a chemical index
| Project/Area Number |
15H02947
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Cultural assets study and museology
|
|---|
| Research Institution | Nagoya University |
|---|
Principal Investigator |
MINAMI MASAYO 名古屋大学, 宇宙地球環境研究所, 准教授 (90324392)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
鍵 裕之 東京大学, 大学院理学系研究科(理学部), 教授 (70233666)
三村 耕一 名古屋大学, 環境学研究科, 准教授 (80262848)
|
|---|
| Research Collaborator |
TOMIYAMA SHINJI 名古屋大学, 大学院環境学研究科
NAKAMURA TOSHIO 名古屋大学, 名誉教授 (10135387)
|
|---|
| Project Period (FY) |
2015-04-01 – 2018-03-31
|
| Project Status |
Completed (Fiscal Year 2017)
|
| Budget Amount *help |
¥18,980,000 (Direct Cost: ¥14,600,000、Indirect Cost: ¥4,380,000)
Fiscal Year 2017: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2016: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2015: ¥14,040,000 (Direct Cost: ¥10,800,000、Indirect Cost: ¥3,240,000)
|
|---|
| Keywords | 炭素14年代 / 炭化物 / 化学処理 / 元素分析 / 赤外吸収スペクトル / 蛍光X線回折パターン / 化学前処理 / 蛍光X線回析パターン / 化学処理法 / 姶良テフラ / 段階的加熱 |
|---|
| Outline of Final Research Achievements |
This study assesses two pre-treatments of charcoal samples: acid-base-acid (ABA) treatment and acid-base-oxidation with stepped combustion (ABOx-SC) treatment. In addition to C14, the effects of the treatments on the chemical structure and composition of charcoal were studied.
The ABOx-treated charcoal yielded older C14 dates than the ABA-treated samples, probably owing to the effects of removing organic contaminants bound to the edges of the aromatic molecular structures produced by the original pyrolysis. This investigation of the structural and compositional changes of charcoal during its pre-treatment demonstrates that oxidation treatment and stepped combustion can remove contaminants preferentially from the ABA-treated charcoal and ABOx-treated charcoal, respectively. Especially, the stepped combustion, not the chemical oxidation, is a key to reduce contaminant residue left after ABA and ABOx treatments.
|
Report
(4 results)
Research Products
(25 results)
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
[Presentation] Present status of 14C AMS system at Nagoya University (2014/15)2015
Author(s)
Toshio Nakamura, Masayo Minami, Fusa Miayake, Kimiaki Masuda, Hirotaka Oda, Akiko Ikeda, Masataka Hakozaki, Fumiko Watanabe Nara, Tomoko Ohta1and Masami Nishida
Organizer
6th East Asian Conference on AMS
Place of Presentation
Taiwan National University, Taipei, Taiwan
Year and Date
2015-10-05
Related Report
Int'l Joint Research / Invited
-
