核化学与放射化学Issue(2)：120-128,9.DOI:10.7538/hhx.2015.37.02.0120
应用210 Pb 的南海黑角珊瑚定年
Application of Radionuclide 210 Pb in Dating of Black Coral
摘要
Abstract
In this study,theαspectrometry technology was used to estimate the activities of 2 1 0 Pb in the skeletons of black corals collected from the Xisha Islands (JYI-1,JYI-2 )and Luhuitou Peninsula (LHT)of the South China Sea.According to the radial distribution characteristics of excess 2 1 0 Pb in the cross-sections of black corals,we studied the chronology of black corals.The results reveal that specific activity of 2 1 0 Pb exhibits an exponential decrease with distance from the edge of the black corals.The ranges of 2 1 0 Pb specific activity in the coral skeleton are 10.28-73.41 mBq/g,1.50-4.72 mBq/g and 5.35-12.67 mBq/g in the JYI-1,JYI-2 and LHT respectively.All black corals are long-lived and slow-growing organisms.They have been growing continuously for 185-267 a,with growth rates ranging from 17.8 to 26.5 μm/a.Moreover,the annual growth rates exhibit obvious distinction in diverse species collected from different regions.The sequence of the growth rate is JYI-2 >JYI-1>LHT.With respect to counting growing rings,the results of radionuclide 2 1 0 Pb in dating of black corals reveal a good conformity.The dating of black corals in this study will provide the basic data to study the evolution and reconstruction of climate change in the past centuries.关键词
210Pb/黑角珊瑚/定年/α能谱仪Key words
210Pb/black coral/dating/αspectrometry分类
海洋科学引用本文复制引用
张晓笛,毕倩倩,蔡炜颖,王希龙,张芬芬,杜金洲..应用210 Pb 的南海黑角珊瑚定年[J].核化学与放射化学,2015,(2):120-128,9.基金项目
中央高校基本科研业务费专项资金资助项目(78210240 （）
78260018) （）
华东师范大学河口海岸学国家重点实验室开放基金项目(SKLEC-KF201206) （SKLEC-KF201206）
