摘要
研究东太平洋海盆多金属结核锶铅同位素地球化学特征。结果表明,结核中锶同位素与铅同位素不相关,锶同位素可用于划分和对比结核生长时代,而铅同位素能指示物源的性质。锶同位素记录表明,有些结核生长历史较短,生长较快,生长过程中不翻转亦不会被“沉积物雨”所淹埋,而铅同位素记录表明结核明显受到了上幔源物质输入的影响。
Based on the study of the isotopic composition of Sr and Pb in polymetallic nodules from the Eastern Pacific Basin, the authors come to the following new views; (1)87 Sr/86 Sr values in polymetallic nodules are not reialed to206 Pb/204 Pb,207Pb/204Pb and 208 Pb/204Pb; (2)The isotopic composition of Sr in poiymetaliic nodules shows that the formation history of some polymetallic noduies is shorter, and their growth rates are bigger; and (3) The isotopic composition of Pb indicates that some polymetallic nodules are considerably af-fecter by mantle-derived materials.
出处
《海洋通报》
CAS
CSCD
北大核心
1996年第6期35-41,共7页
Marine Science Bulletin
