2024-03-29T11:14:23Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00018128
2023-01-16T04:05:48Z
879:1183:1184:1612
プラント・オパール中の炭素抽出とその14C 年代測定の試み
Study on age determination by carbon in plant opal : Tests of carbon extraction and radiocarbon dating of plant opal
中村, 俊夫
宇田津, 徹朗
田崎, 博之
外山, 秀一
杉山, 真二
松田, 隆二
Nakamura, Toshio
Udatsu, Tetsuro
Tazaki, Hiroyuki
Toyama, Shuichi
Sugiyama, Shinji
Matsuda, Ryuji
open access
accelerator mass spectrometry
radiocarbon dating
plant opal
RF furnace
paddy field remnant
加速器質量分析
放射性炭素年代測定
プラント・オパール
高周波加熱炉
水田遺構
To measure 14C age directly on plant opal itself with accelerator mass spectrometry (AMS), we have extracted carbon contained in plant-opal samples separated from modern lining plants as well as ancient soil deposits at archeological sites, in particular, rice field remains. Carbon dioxide was separated and collected from plant-opal samples by using a radio-frequency furnace (HF-1O, Leco Corporation) which is used successfully to extract carbon in the metal iron. Carbon content of plant opal is not clearly known, and yields of CO2 from p1ant-opal samples were very low (<0.1%) in our experiment Nagoya University AMS 14C dating laboratory. We have conducted CO2 extraction for 15 samples, and we can get enough CO2 from only three samples to perform 14C dating even with AMS. The obtained 14C ages were a few thousand years older than expectations on the basis of archeological aspects. Even more, plant-opal samples extracted from modern living plants showed 14C ages as old as 3-6 ka BP. This implies that carbon in plant opal is not derived from carbon incorporated into the plants by photosynthesis. More studies are required to apply routinely 14C dating of plant-opal material.
名古屋大学年代測定総合研究センターシンポジウム報告
名古屋大学年代測定資料研究センター
2013-03
jpn
departmental bulletin paper
VoR
https://doi.org/10.18999/sumrua.24.123
http://hdl.handle.net/2237/20152
https://nagoya.repo.nii.ac.jp/records/18128
10.18999/sumrua.24.123
名古屋大学加速器質量分析計業績報告書
24
123
132
https://nagoya.repo.nii.ac.jp/record/18128/files/sumrua_24_123.pdf
application/pdf
5.9 MB
2018-02-21