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对黄河三门峡北岸的山西平陆庙下、阳凹两个黄土剖面研究结果表明 ,S6、S1 的磁化率值较黄土高原明显偏高 ,S5～ S2 的磁化率值则相对偏低 ,L7～L2 的磁化率值也表现出较低值 ,与黄土高原内部 L9磁化率值相近。另外 ,S5～L5地层厚度较大。把两剖面磁化率曲线与曹村剖面黄土 -古土壤序列磁化率曲线、深海氧同位素曲线、北半球 6 5°N太阳辐射变化曲线进行对比后表明 ,两剖面磁化率曲线反映的气候变迁 ,在 0 .1 Ma尺度上与黄土高原内部基本相同 ,反映出与地球轨道要素变化控制的太阳辐射变化诱导的全球冰期 -间冰期气候旋回的一致性 ;但并不是简单的一一对应关系 ,表现在地层厚度较大、磁化率值相对较低。其原因可能有 4个 :一是粉尘堆积速率不同 ,二是受流水侵蚀 ,三是物质来源有别 ,四是局地的成壤条件差异。
The results of the two loess sections of Pinglu and Yangyang in the north bank of the Sanmenxia of the Yellow River show that the magnetic susceptibility values of S6 and S1 are obviously higher than those of the Loess Plateau while the magnetic susceptibility values of S5 ~ S2 are relatively low. The L7 ~ L2 Also showed a lower value, which was close to the value of L9 susceptibility in the Loess Plateau. In addition, S5 ~ L5 strata thickness. Comparing the magnetic susceptibility curves of the two sections with the susceptibility curve of loess-paleosol sequence in Caocun section, the deep sea oxygen isotope curve and the solar radiation curve at 65 ° N in the northern hemisphere show that the magnetic susceptibility curve reflects the climatic change at 0 .1 Ma is similar to the interior of the Loess Plateau and reflects the consistency of the global glacial-interglacial climatic cycles induced by changes in solar radiation controlled by changes in the Earth’s orbital elements. However, it is not a simple one-to-one correspondence and is manifested in the strata Thicker, the magnetic susceptibility value is relatively low. The reason may have four: First, the dust accumulation rate is different from the second is subject to erosion of water, the third is the material source is different from the fourth is the local differences in soil conditions.