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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。
In this paper, the distributions, controlling factors and geochemical characteristics of calcium and silicon in seven columnar samples in the deepwater area of latitudes 2 ° -8 ° and 170 ° -173 ° 20 ’east longitude are analyzed in detail. The results show that the content of calcium carbonate decreases with the increase of latitude and longitude of sedimentary sites and is related to sediment types (calcareous - calcareous, siliceous - brown clay - siliceous slime), whereas Silicon dioxide increases; the main factor controlling the distribution of calcium carbonate and silica is the biological species, which in turn is affected by water depth; calcium carbonate and silica exist in essentially the same biological shell, but in deepwater environments There are also very different chemistries that provide a very good negative correlation between calcium carbonate and silica, a negative correlation that, to some extent, can reflect the sedimentary environment in the deep water of the western Pacific.