›› 1987, Vol. 7 ›› Issue (3): 234-239.

• 论文 • 上一篇    下一篇

210Pb法在深圳湾现代沉积速率研究中的应用

王传华, 陆国琦, 谭惠忠   

  1. 广州地理研究所
  • 出版日期:1987-07-30 发布日期:1987-07-30

210Pb METHOD APPLIED TO THE ATUDY OF MODERN SEDIMENTATION RATES IN THE ZHENZHEN BAY

Wang Chuanhua, Lu Guoqi, Tan Huizhong   

  1. Guangzhou Institute of Geography
  • Online:1987-07-30 Published:1987-07-30

摘要: 同位素210Pb测年法,是70年代发展起来的一种新的测试技术,用于测定100多年来泥沙的沉积速率和沉积年代.目前,这一方法已被广泛应用于湖泊、河口、港湾和大陆架等不同沉积环境的泥沙沉积速率的研究.实际应用表明,21)Pb法与纹泥法、孢粉法和某些放射性同位素年代学方法一样,已被证实是一种可靠的测年方法.

Abstract: Three undisturbed cores were obtained with a static corer(Model LDC-1-1) from the Shenzhen Bay,and their sedimentation rates' were determinated by 210Pb method.There are three characteristic layers shown from the profiles:the surface mixed layer.the low background activity layer and the radioctive decay layer in which the distribution of excess 210Pb decreased exponentially with depth.The sedimentation rates of these three cores are 1.27,2.40,2.50cm/yr.,and the sedimentation fluxes are 0.92,1.55,1.60g/cm2.yr.