银川平原全新世地层氧化物特征在气候上的意义

The Oxidic Characteristics of the Holocene Series in Yinchuan Plain,Ningxia and Their Climatic Significance

本文在对银川平原水洞沟和插旗口全新世地层剖面全量氧化物因子分析的基础上,初步探讨了氧化物剖面分布特征和规律,并选用Q型因子分析的f_1/f2比值作为判别相对干燥或湿润的指标,具有区域对比意义。认为银川平原全新世以来始终处于干旱气候环境中,其表生地球化学过程明显受水分条件制约和影响,在气候演化上表现出干热和相对冷湿的性质。

Based on the results of factor-analysis of the total oxides in the Holocene series in Shuidonggou and Chaqikou on Yinchuan plain, this paper mainly discusses the distributional characteristics and the regularities of the oxides and also suggests that the f_1/f_2 ratio in Q model analysis may be used as one of the indixes for dividing the dry and the wet type which can obtain the comparative significance in the area From these it is known that the arid climate en Yinchuan plain has run all through out during the Holocene epoch,the exogenic geochemical processes have been controlled and influenced by the degree of moisture and the characteris- tice of dry-warm climate alternating with relative wed-cold in the evolution- ary processes of environment were shown