Marine reservoir correction in the south of Vietnam estimated from an annually-banded coral
Marine reservoir correction in the south of Vietnam estimated from an annually-banded coral
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DOI：
10.1017/s0033822200035712
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发表时间：
2004-01-01
期刊：
影响因子：
8.3
通讯作者：
Kobayashi, T
中科院分区：
文献类型：
--
作者：
Dang, PX;Mitsuguchi, T;Kobayashi, T
我们测量了在越南孔岛（距离湄公河入海口90公里）采集的年度带状珊瑚岩心的放射性碳，并估计了海洋储层年龄（DeltaR值）的区域校正。从公元1949-1960年的年度波段连续采集了12个样品，这些样品在紫外光（类似于352 nm）和x射线照相下被清楚地识别出来。样品中的C-14含量是用日本筑波国立环境研究所的加速器质谱仪测定的。结果提供了Delta(14)C时间序列，显示1949-1955年期间的相对稳定值为-48.6 +/- 4.69‰，从1956年开始突然增加，表明对大气核弹试验的快速反应。使用爆炸前的C-14数据，越南南部的DeltaR值估计为-74 +/- 39年。
We measured radiocarbon in an annually-banded coral core collected from Con Dao Island, Vietnam, 90 km from the mouth of the Mekong River, and estimated the regional correction of the marine reservoir age (DeltaR value). Twelve samples were continuously taken from the annual bands (AD 1949-1960) which were clearly identified under UV light (similar to352 nm) as well as by X-radiography. The C-14 content of the samples was determined using an accelerator mass spectrometer at the National Institute for Environmental Studies, Tsukuba, Japan. Results provide a Delta(14)C time series showing a relatively steady value of -48.6 +/- 4.69parts per thousand for the period of 1949-1955 and an abrupt increase starting from 1956 that indicates a quick response to the atmospheric testing of nuclear bombs. Using the prebomb C-14 data, the DeltaR value in the south of Vietnam is estimated to be -74 +/- 39 yr.