^(10)Be-加速器质谱法测定深海多金属结核的生长速率  

DETERMINATION OF GROWTH RATES OF DEEP-SEAPOLYMETALLIC NODULES WITH ^(10)Be ACCELERATORMASS SPECTROMETRY

作　　者：吴世炎[1] 尹明端[1] 施纯坦[1] 曾文义[1] 邹汉阳[1] 曾宪章[1] 

机构地区：[1]国家海洋局第三海洋研究所,厦门361005

出　　处：《热带海洋》1999年第1期73-78,共6页

摘　　要：采用加速器质谱法测定了东太平洋海盆ＣＣ区３个多金属结核和中太平洋海盆北部１个多金属结核中(１０)Ｂｅ的质量活度（比活度，下同）随径向深度的分布。论述了(１０)Ｂｅ－加速器质谱法测定生长速率的步骤。使用该法测得这４个多金属结核的生长速率分别为７．５，２．７，９．６和１．５ｍｍ·Ｍａ(－１)，这些数据接近其他作者利用(１０)Ｂｅ法测定的世界各大洋多金属结核的生长速率。还研究了(１０)Ｂｅ法测定的生长速率与多金属结核ｍ(Ｍｎ)／ｍ(Ｆｅ)比值的关系。Radial distributions of massic activity of 10Be are measured by acceleratormass spectrometry for four polymetallic nodules, one from the Northern Central Pacific,and the others from the CC zone of the East Pacific. Also described here is theprocedure for determination of growth rates of polymetallic nodule with 10 Beaccelerator mass spectrometry. The growth rates of nodules measured by 10Be methodare 7.5, 2.7, 9.6 and 1.5 mm every millionyears respectively. The results are inreasonably good agreement with those of other nodules from world oceans determinedwith 10Be method by other investigators. In addition, the relationship between growthrates determined by 10Be method and Mn / Fe ratio of polymetallic nodule is studied.

关 键 词：加速器质谱法 多金属结核 生长速率 铍10 

分 类 号：P744.3[天文地球—海洋科学]