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临汾盆地是山西地堑系南部的一个断陷盆地,是研究第四纪环境变化的重要地区。文中以临汾盆地郭家庄钻孔(GJZ)剖面为研究对象,对钻孔岩芯进行磁化率和粒度测定,并与其它典型剖面对比分析,发现临汾盆地中更新世(Q2)中晚期的沉积环境:上部为黄土沉积下部为河湖相沉积,气候共经历了四个冷-暖交替阶段。磁化率和沉积物粒度与西峰剖面对比,表现出相同气候条件下的不同沉积环境的变化。该结果为研究山西中部盆地这一时期沉积环境和气候变化具有重要意义。
Linfen basin is a faulted basin in the southern part of Shanxi Graben and is an important area for studying the environmental change in Quaternary. In this paper, the GJZ section of Linfen Basin is taken as the research object. The magnetic susceptibility and particle size of the core are measured and compared with other typical sections. It is found that the sedimentary environment of Middle Pleistocene (Q2) The lower part of the loess sediments is the sediments of rivers and lakes, and the climate experienced a total of four cold-warm alternations. The magnetic susceptibility and sediment grain size are compared with the Xifeng profile and show the variation of different depositional environments under the same climatic conditions. The result is of great significance for the study of sedimentary environment and climate change during this period in central Shanxi Basin.