长江中下游地区下蜀黄土磁化率曲线比较研究

Comparative Study on The Magnetic Susceptibility of The Xiashu Loess in the Middle and Lower Changjiang River Region

通过对镇江大港剖面地层结构和磁化率曲线特征的分析研究，以及与相邻地区风尘堆积研究成果的比较，认为长江中下游地区中更新世以来，经历了七次大的古气候冷暖旋回，旋回变化幅度较北方黄土区要小得多，冷期和暖期都存在着频繁的小尺度的气候冷暖波动，并可与深海氧同位素曲线相比较；另外，在镇江下蜀黄土磁化率测量中还发现。

Based on the analytical study of the stratum structure and magnetic susceptibility curve characteristics of Zhenjiang Dagang profile , and the comparison of research findings of aeolian accumulation in its adjacent area, it is considered that the middle and lower Changjiang river region undergoes 7 large paleoclimate cycles since the middle pleistocene, the change range of the cycles is much smaller than it in north China, frequent small scale cold hot climate fluctuation occurs in both hot period and cold period and can compare with abyssal oxygen isotope curve. The groundwater soak has a big effect on magnetic susceptibility value of profile loess sample in Zhenjiang area.