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前言大型湖泊的沉积物记录着古大陆气候的变化,其沉积层续往往是连续的(或半连续的)并包含有各种环境标志。可用这些沉积物标志建立详细的古大陆环境标志。早期用这些标志确定阶地抬升和古湖岸线的时代。近年来,新技术新方法的出现对传统的环境标志有了新的解释。目前,沉积相分析不仅仅用于推断湖水水位,而且也用来推断过去的水化学环境。湖泊沉积物中的孢粉可推测区域性植物群的变化,用来阐明蒸发量、降水量以及气温的变化。
Foreword Sediments in large lakes record changes in paleocontinental climate. Sediments are often continuous (or semi-continuous) and contain a variety of environmental markers. These sediment signs can be used to establish detailed paleoenvironmental signs. Early use of these signs to determine the terraces uplift and the ancient lake shoreline era. In recent years, the advent of new methods and techniques has given new interpretations of traditional environmental labels. At present, sedimentary facies analysis is not only used to infer the lake water level, but also to infer the past water chemistry environment. Sporopollen in lacustrine sediments can be used to speculate the changes of regional flora and to illustrate the changes of evaporation, precipitation and temperature.