本文通过对中太平洋北部海盆表层和柱状沉积物中钙质超微化石的分析鉴定,讨论了该调查区处在溶跃面以下表层沉积物中钙质超微化石的种数与水深变化的关系,推测出本调查区中Ⅰ区的碳酸盐补偿深度约5300米。根据地层中出现的标准化石,对柱状岩芯M_(14)进行了地层年代划分。最上部地层年代约为27万年前,向下1米处年代约为44万年前,3.66米处年代约为122万年前。 Based on the analysis and identification of calcareous microfossils in surface and column sediments in the northern central Pacific Ocean, the relationship between the number of calcareous microfossils and water depth in surface sediments under the surface of the leveled area is discussed It is estimated that the carbonate compensation depth in area I of this survey area is about 5,300 meters. According to the standard fossils appearing in the strata, the stratigraphic division of column core M_ (14) is stratified. The uppermost formation was about 270,000 years ago, with an elevation of about 440,000 years at 1 meter down and about 1.22 million years at 3.66 meters.