書誌事項
- タイトル別名
-
- Investigation of sedimentation rate in Ago Bay, Japan by lead-210 dating
- 210Pb堆積年代測定法による英虞湾の堆積環境の解析
- 210Pb タイセキ ネンダイ ソクテイホウ ニ ヨル アゴワン ノ タイセキ カンキョウ ノ カイセキ
この論文をさがす
抄録
Lead-210 dating method was applied to the sediment cores collected in Ago Bay, Mie prefecture, Japan where the seawater and bottom sediments have been contaminated due to the active pearl cultivation carried out for more than 100 years. A contamination with pearl cultivation was observed on the vertical distribution of the organic carbon (OC) and nitrogen (N), and the OC/N ratio suggesting marine plankton was a major source as the organic contaminants. A surface mixed layer (SML) was observed on the excess 210Pb vertical distribution and the underlying part, below the SML, was divided into two layers with different sedimentation rates, suggesting the change of sedimentary condition in the late 1960s. The transition of the sedimentation rate is supposed to occur in connection with the change of pearl-production activity in Ago Bay. The surface mixed layer of 137Cs has expanded to the deeper layer than that of the excess 210Pb and the inventory of 137Cs was significantly smaller compared to that of the excess 210Pb. These facts suggest different behavior of 210Pb and 137Cs in the marine environment after they were transferred from the freshwater environment as soil-particle associated radionuclides.
収録刊行物
-
- 地球化学
-
地球化学 42 (3), 99-111, 2008
一般社団法人日本地球化学会
- Tweet
詳細情報 詳細情報について
-
- CRID
- 1390001205741102976
-
- NII論文ID
- 110009442232
-
- NII書誌ID
- AN00141280
-
- ISSN
- 21885923
- 03864073
-
- NDL書誌ID
- 9643053
-
- 本文言語コード
- ja
-
- データソース種別
-
- JaLC
- NDL
- CiNii Articles
-
- 抄録ライセンスフラグ
- 使用不可