JOURNAL ARTICLE
我国南海陆坡沉积物沉积速度的研究
Year: 1983 Journal: Science in China Series B-Chemistry Biological Agricultural Medical & Earth Sciences (in Chinese) Publisher: Science China Press
Abstract
应用Th过230方法测定了南海陆坡沉积物的沉积速度,结果表明,岩柱上部从表层到48厘米,可能发生过滑坡,反映出不连续沉积过程,古气候转暖;岩柱中段,Th过230强度沿深度呈指数衰减,沉积速度为1.6毫米/1,000年,沉积物可能是在较冷和深水环境中形成的;岩柱从90厘米以下,沉积环境较为活跃,古气候偏暖. 根据岩柱各层位中铀、钍含量和其比值以及与Fe,Mn,C(有机),P的关系,本海区主要物质来源于陆相,部分是自生.
Keywords:
Chemistry Physics
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