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根据东太平洋海盆ＰＣ５７９４柱状样１４７—６９５ｃｍ（早中新世早期）的氧同位素、生物ＣａＣＯ３、古温度及成矿元素等的研究结果表明，该区早中新世早期沉积物的δ１８Ｏ大致可分为五组，所反映的气候变化存在三个暖期和二个冷期的冷暖交替。氧同位素与生物ＣａＣＯ３呈正相关关系；无生物ＣａＣＯ３条件下的成矿元素与古温度的变化趋势具三种情况：Ｍｎ、Ｆｅ、Ｃｏ含量变化趋势与古温度呈正比；Ｃｕ含量与古温度呈反比；Ｎｉ介于上述两种类型之间。ＰＣ５７９４早中新世早期的硅钙质软泥与钙硅质软泥为寒冷气候下的沉积物，有利于沉积型多金属结核的形成
According to the results of the oxygen isotope, bio-CaCO3, palaeo-temperature and ore-forming elements in the 147-695cm column of PC5794 in the eastern Pacific Basin (early Early Miocene), the δ18O of sediments in the Early Early Miocene can be roughly divided For the five groups, there are three warm periods and two cold periods that reflect the climate change. There is a positive correlation between oxygen isotope and bio-CaCO3. There are three conditions for the change of ore-forming elements and palaeoclimatic temperature without biogenic CaCO3: the trend of Mn, Fe, Co content is in direct proportion to the palaeoclimate; Cu content is inversely proportional to palaeoclimatic temperature Ni is between these two types. Early stage of Early Miocene of PC5794 calcareous silts and calcareous silts are sediments in cold climates and are favorable for the formation of sedimentary polymetallic nodules