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本文根据系统测定的大理点苍山—洱海地区白雀寺地层剖面的氧化矿物含量数据,对该剖面的风化系数和风化变率及其古环境意义进行了深入的探讨;在此基础之上,选择出其中的硅铁化变率曲线,主要采用函数转换法就古环境中温度升降过程的波动幅度进行了推算。揭示出云南北部晚更新世大理冰期中存在着短时的气温回暖期,而在大理冰期内气候的冷暖波动较低,高纬地区的更加剧烈。经与低、高纬地区古气候变化曲线的比较研究,证明大理白雀寺地层剖面风化变率所示的气候变化曲线与其基本一致,但也存在着明显的地域差异性。
Based on the data of oxidized minerals in the Baiqueisi stratigraphic section of Cangshan-Erhai Lake, Dali, which is measured by the system, the weathering coefficient and weathering variability of this section and its paleoenvironmental significance are discussed in depth. On this basis, One of the ferrosiliconization rate curve, the main function of the conversion method used in the paleoenvironmental temperature fluctuations in the process of fluctuations were estimated. It is revealed that there is a short-term warming temperature in the late Pleistocene Dali ice age in northern Yunnan, while the warm and cold fluctuations in the Dali ice period are lower and the high latitudes more intense. The comparison with the paleoclimatic curves in the low latitudes and high latitudes shows that the climatic curves shown by the weathering variability of the Baiheji Formation in Dali are consistent with those of the paleoclimatic change curves, but there are also obvious regional differences.