| タイトル |
-
en
Lead concentration and isotopic composition in the Pacific sclerosponge (Acanthochaetetes wellsi) reflects environmental lead pollution
|
| 作成者 |
|
| アクセス権 |
open access |
| 主題 |
|
| 内容注記 |
-
Abstract
en
We measured Pb/Ca and Pb isotopes with high resolution in the high-Mg calcite skeleton of a Pacific sclerosponge (Acanthochaetetes wellsi) collected from the reef edge off the western coast of Kume Island (East China Sea), to investigate its potential to he used as a proxy for lead contamination in the environment, and atmospheric transportation and fallout over the last few decades. Skeletal Pb/Ca ranged from 58 to 1642 nmol/mol, 10x higher than that of the aragonite skeleton of Pacific corals, and 2.5x higher than that of the aragonite skeletons of Caribbean sclerosponges. The Pb/Ca timeseries recorded from 1967 through 2007 CE correspond to historical changes in atmospheric lead flux in anthropogenic aerosols. Pb isotopes (Pb-206/Pb-207 and Pb-208/Pb-207) in the sclerosponge skeleton document that the main source of lead emissions shifted from Japan (1970-1980 CE) to China (1995-2005 CE), as expected from the timing of legislation against the use of leaded gasoline in Japan and China. Our results indicate that the skeleton of the Pacific sclerosponge is a powerful proxy to monitor environmental lead pollution. Applying this methodology to long-living and/or fossil specimens could be useful in determining the interannual variability of atmospheric transport and dynamics over geologic time scales.
|
| 出版者 |
en
Geological Society of America
|
| 日付 |
|
| 言語 |
|
| 資源タイプ |
journal article |
| 出版タイプ |
AM |
| 資源識別子 |
HDL
http://hdl.handle.net/2115/58018
|
| 関連 |
-
isVersionOf
DOI
https://doi.org/10.1130/G34316.1
|
| 収録誌情報 |
-
-
PISSN
0091-7613
-
EISSN
1943-2682
-
en
Geology
-
巻42
号4
開始ページ287
終了ページ290
|
| ファイル |
|
| コンテンツ更新日時 |
2023-07-26 |
