26A1/10Be and 7Be/9Be/10Be Systematics in the Marine Environment

铍(10Be和7Be)和铝(26Al)的放射性同位素是由宇宙射线与大气和地球表面的原子相互作用产生的。它们通过湿/干沉降物进入海洋，在26Al的情况下，也在一定程度上通过风沙输送进入海洋。它们有不同的半衰期。它们与稳定的9Be和27Al具有不同的地球化学源功能、行为和途径，但通过同位素亲缘关系以某种方式联系在一起。合在一起，它们可用作一系列海洋学和地球物理问题的强大时间和过程示踪剂，如海洋地质年代学、海洋混合、过去和现在的尘埃输送强度和海洋边缘生产力以及气溶胶行为。近年来，这些同位素测量技术的改进使它们的示踪剂用途的潜力得以发掘。研究了10Be和9Be在海洋-大气系统中的基本分布特征和地球化学行为。这一过去的努力现在扩展到对26Al的研究，因为海洋中这种同位素的数据几乎不存在。将在海水中进行26Al/10Be和7Be/10Be的测量，在深海沉积物和铁锰矿床的自生相中进行26Al/10Be、10Be/9Be和26Al/27Al的测量。从测量中将得到：(1)更好地了解26Al和10Be的比较海洋地球化学，(2)10Be/9Be年代学的精化，(3)26Al/10Be绝对定年方法的评价，(4)陆源26Al向海洋的输入估计，以及(5)探索使用同位素系统追踪海洋环流和大气尘埃传输过去的变化的可能性。

Radioisotopes of beryllium (10Be and 7Be) and aluminum (26Al) are produced by the interaction of cosmic rays with atoms in the atmosphere and on the Earth's surface. They enter the ocean via wet/dry fallout, and in the case of 26Al, via aeolian transport to a certain extent as well. They have different half-lives. They and their stable counterparts, 9Be and 27Al, have varied geochemical source functions, behavior, and pathways, yet are linked in some way through isotopic kinships. Together, they can be used as powerful time an process tracers for a number of oceanographic and geophysical problems such as marine geochronology, ocean mixing, past and present intensity of dust transport and ocean margin productivity, and aerosol behavior. The improvement of measurement techniques of these isotopes in recent years allows the potential of their tracer utility to be explored. The basic distributional features and geochemical behavior of 10Be and 9Be in the ocean-atmosphere system has been studied. This past effort is now extended to the study of 26Al, as data base on this isotope in the ocean borders on virtual non- existence. Measurements will be made of 26Al/10Be and 7Be/10Be in seawater, and 26Al/10Be,10Be/9Be and 26Al/27Al in authigenic phases of deep-sea sediments and ferromanganese deposits. From the measurement will come: (1) better understanding of the comparative marine geochemistry of 26Al and 10Be, (2) refinement of the geochronology with 10Be/9Be, (3) evaluation of the absolute dating method of 26Al/10Be, (4) estimation of the input of the land- originated 26Al to the ocean, and (5) exploration of the possibility of using the isotope systems to trace past variations in ocean circulation and atmospheric dust transport.