【摘要】 本文详细分析了中太平洋西部南纬2°—8°,东经170°—173°20′深水区域7个柱状样品中钙、硅的含量分布、控制因素及地球化学特征。研究表明,碳酸钙的含量随着沉积位置的经、纬度增加而减少,且与沉积物类型有关(钙质软泥—钙、硅质软泥—棕色粘土—硅质软泥渐减),而二氧化硅递增;控制碳酸钙和二氧化硅分布的主要因素是生物种属,而生物又受水深的影响;碳酸钙和二氧化硅以基本相同的生物壳体形式存在,但在深水环境中又有完全不同的化学性质,使碳酸钙和二氧化硅间呈极好的负相关,这种负相关在某种程度上可以反映中太平洋西部深水区的沉积环境。更多还原

【Abstract】 This paper analysis in detail the distributing law, control factors and characteristics of geochemistry of calcium and silicon in the deep-sea sediments at 7 stations in western region of central pacific (2°-8°N, 170°-172° 21’E). The result shows that the content of calcium carbonate in the sediments decreases with the increases of longtude and latitude of the samping stations, and is related to the sediment types (calcarious ooye>calcarioussiliceous ooye>red clay>siliceous ooye), and that the content of silicon dioxide is contrary to that of calcium carbonate. The calcium carbonate and silicon dioxide are controlled by living things, such as foraminifers and radiolarians, and the living things are also affected by the depth of water. The existing forms of calcium carbonate and silicon dioxide are the same, but they have different chamical nature in deep-sea water, which results in excellant negative relationship between calcium carbonate and silicon dioxide. According to the over relationships, the deep sediment environments of the wertern region of the central pacific may be recognized.更多还原