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对汉江上游进行野外实地详细调查,在湖北省郧县尚家河台地前沿发现了典型的全新世黄土-古土壤沉积剖面,通过粒度、磁化率、吸湿水和烧失量分析表明,黏粒、细粉砂、磁化率、吸湿水和烧失量在古土壤层S0出现高值,在L1、Lt、L0为低值;而粗粉砂、细砂粒和粗砂粒在S0为低值,在L1、Lt、L0为高值。这些指标的变化说明了全新世以来的气候和成壤环境的变化特征,即在古土壤S0形成时期,气候温暖湿润,成壤作用非常强烈;黄土堆积时期气候相对干旱,成壤作用较弱。
In the upper reaches of the Hanjiang River, a detailed field survey was conducted. A typical section of the Holocene loess-paleosol deposition was found on the front of the Shangjiahe platform in Yun County, Hubei Province. Based on the analysis of grain size, magnetic susceptibility, moisture absorption and loss on ignition, Fine silt, magnetic susceptibility, hygroscopic water and loss on ignition showed high values in S0, L1, Lt and L0, but low values in coarse silt, fine sand and coarse sand, , Lt, L0 is high. The changes of these indices indicate the characteristics of climate and pedogenesis since the Holocene, that is, during the formation of Paleozoic soil, the climate was warm and humid and the pedogenesis was very strong. In the loess accumulation period, the climate was relatively arid and the pedogenesis was weak.