CAJ | 학술논문

采用色度学方法，系统研究了下蜀黄土典型剖面的反射光谱特征。结合磁化率、微量元素Rb、Sr的含量和比值，讨论了色度参数的古气候意义，初步把下蜀黄土形成以来的古气候划分为3个波动旋回。下蜀黄土和黄土高原色度参数的对比，揭示了长江中下游地区更强的化学风化作用和成壤强度。
채용색도학방법，계통연구료하촉황토전형부면적반사광보특정。결합자화솔、미량원소Rb、Sr적함량화비치，토론료색도삼수적고기후의의，초보파하촉황토형성이래적고기 후화분위3개파동선회。하촉황토화황토고원색도삼수적대비，게시료장강중하유지구경강적화학풍화작용화성양강도。
This paper deals with the reflectance spectrum of Xiashu Loess. Lijiagang profile, a typical profile of Xiashu loess, has been selected to study the difference in reflectance spectrum between the loess layers and its overlaping paleosol layers. The results determined by two kinds of color differential meter show that both of the brightness and the red index can be served as a useful tool to discriminate the paleosols from the sequence. The paleoclimate revealed by color indexes in Xiashu loess has been divided into 3 main cycles based on the configuration of reflectance spectrum, which can be also confirmed by the signals of magnetic susceptibility and the contents and ratio of element Rb to Sr. Compared with the equivalents in Loess Plateau, west China, the Xiashu loess shows higher values in reflectance spectrum, which implies a relative stronger chemical weathering and pedogenesis in the lower reach area of Changjiang River.