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  1. F300 宇宙地球環境研究所
  2. F300b 紀要
  3. 名古屋大学加速器質量分析計業績報告書
  4. 22

見かけ上の炭素年代差を用いた環境解析 : 淡水湖産貝,骨試料を例として

https://doi.org/10.18999/sumrua.22.49
https://doi.org/10.18999/sumrua.22.49
963e4e05-fb2d-4433-b1f7-6433c18250f3
名前 / ファイル ライセンス アクション
miyata2010.pdf miyata2010.pdf (1.2 MB)
Item type 紀要論文 / Departmental Bulletin Paper(1)
公開日 2012-06-04
タイトル
タイトル 見かけ上の炭素年代差を用いた環境解析 : 淡水湖産貝,骨試料を例として
言語 ja
その他のタイトル
その他のタイトル Environmental analysis by apparent radiocarbon age difference : molluscan shells and bone samples from Lake Biwa
言語 en
著者 宮田, 佳樹

× 宮田, 佳樹

WEKO 83190

ja 宮田, 佳樹

Search repository
南, 雅代

× 南, 雅代

WEKO 83191

ja 南, 雅代

Search repository
中村, 俊夫

× 中村, 俊夫

WEKO 83192

ja 中村, 俊夫

Search repository
Miyata, Yoshiki

× Miyata, Yoshiki

WEKO 83193

en Miyata, Yoshiki

Search repository
Minami, Masayo

× Minami, Masayo

WEKO 83194

en Minami, Masayo

Search repository
Nakamura, Toshio

× Nakamura, Toshio

WEKO 83195

en Nakamura, Toshio

Search repository
アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
キーワード
主題Scheme Other
主題 Radiocarbon dating
キーワード
主題Scheme Other
主題 Reservoir effect
キーワード
主題Scheme Other
主題 Lake Biwa
キーワード
主題Scheme Other
主題 Apparent age difference
キーワード
主題Scheme Other
主題 Carbon cycle
キーワード
主題Scheme Other
主題 炭素年代測定
キーワード
主題Scheme Other
主題 淡水リザーバー効果
キーワード
主題Scheme Other
主題 琵琶湖
キーワード
主題Scheme Other
主題 見かけ上の年代差
キーワード
主題Scheme Other
主題 炭素循環
抄録
内容記述 We measured the radiocarbon ages of the samples such as molluscan shells, fish, Phragmites and pine leaves collected after 1966 year at Lake Biwa to examine the possibility of freshwater reservoir effects at Lake Biwa, Japan. The molluscan shells collected after 1990 year, were hardly affected from the nuclear bomb test, showed 330 -450 14Cyrs older radiocarbon ages than that of the coeval atmosphere. Then, the apparent difference in radiocarbon ages between the shell fossils and wood samples & soft-shelled turtles and terrestrial animals (-300 14C yrs) excavated from the Awazu submarine shell midden at Lake Biwa suggests that the freshwater reservoir effect existed in middle Holocene (the Middle Jomon period) at Lake Biwa. Because the present-day average residence time of Lake Biwa water is less than a decade, its direct influence on the reservoir effect is little, which suggests that old carbon has been supplied into Lake Biwa. The both age offsets of radiocarbon dating strongly indicate that there were likely to be freshwater reservoir effects at Lake Biwa from middle to late Holocene, which was corresponded to about 5000 years. A great deal of organic matter has flowed into Lake Biwa. Some very old radiocarbon ages can result from retention of old carbon in peat layers formed by plants such as the ditch reeds that grow along the shore of Lake Biwa. This may have been the result of the inflow of aged subsurface waters that may have dissolved old carbon from the carbonate rocks of Mt. Ibuki and Mt. Ryouzen. Therefore the degree of freshwater reservoir effects at Lake Biwa had a possibility to fluctuate, depending on change of the lake environment such as inflow into the lake and circulation of the lake water. In this paper, we discuss the relationships between the apparent radiocarbon age offsets and its lake environment to understand carbon cycle from middle to late Holocene at Lake Biwa, Japan.
言語 en
内容記述タイプ Abstract
抄録
内容記述 本研究では、琵琶湖沿岸の粟津湖底第三貝塚から出土した、貝、獣骨や現生琵琶湖産魚貝試料の見かけ上の炭素年代差を見積もり、琵琶湖水に観察される淡水リザーバー効果の大きさの変遷を推定した。その結果、縄文時代後期から大正までの琵琶湖水の淡水リザーバー効果の大きさに関する実測データはないが、琵琶湖周辺の石灰岩地帯や琵菅湖岸の泥炭層などに由来する古い炭素の影響によって,完新世後期のおよそ5000年間、琵琶湖水中の溶存無機炭素中の炭素14濃度は、300~45014Cyrレベルのリザーバー効果を示す一定の値に保たれていた可能性が高いと推定される。
言語 ja
内容記述タイプ Abstract
内容記述
内容記述 第23回名古屋大学年代測定総合研究センターシンポジウム平成22(2010)年度報告
言語 ja
内容記述タイプ Other
出版者
言語 ja
出版者 名古屋大学年代測定資料研究センター
言語
言語 jpn
資源タイプ
資源 http://purl.org/coar/resource_type/c_6501
タイプ departmental bulletin paper
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
ID登録
ID登録 10.18999/sumrua.22.49
ID登録タイプ JaLC
書誌情報 ja : 名古屋大学加速器質量分析計業績報告書

巻 22, p. 49-54, 発行日 2011-03
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