我国湖泊沉积环境演变研究中元素地球化学的应用现状及发展方向

PRESENT SITUATION AND FUTURE DEVELOPMENT OF ELEMENTAL GEOCHEMISTRY IN THE STUDY OF LAKE SEDIMENTS'' EVOLUTION

中文关键词:  湖泊沉积物,元素地球化学,环境演化,影响因素

英文关键词:Lake sedments, Elemental geochmistry, Evironmental evolution ,Factors of influence.

中文摘要:

      全球气候恶化，洪涝、风沙、干旱等自然灾害频繁，科学研究预测区域乃至全球环境演变趋势，并采取有效措施加以防治，成为目前全人类面临的一大课题。要科学的掌握环境变化的规律，就必须研究过去的环境变迁，沉积物无疑是最好的研究对象。而湖泊在其发生发展过程中，直接出露于地表，其沉积物则是最好记录环境变化信息的载体。近几年来元素地球化学在研究湖泊演变历史，揭示湖泊环境变迁等方面取得了很大的进展。根据目前的研究现状，今后的工作应着眼于分析研究引起源泊环境变化的原因，环境演变与人类活动的关系及其演变规律，进而对未来环境演变趋势进行预测和对自然灾害进行防治，或许是今后湖泊沉积物元素地球化学研究的主要方向。

英文摘要:

      Nowardays, the global climate is becoming variable and natural disasters such as floods,droughts and blown-sands occur frequently.Hence ,prediction of the changable trend of climate, with no doubt, is an important task to carry out.It's well known that,the content of elements in lake sediments, recording much information about the past environmental evolution,is an effective source to study.In recent years , elemental geochemistry has been widely used in studying the evolutionary history of lakes,in discovering environmental changes in lake sediments and so on.According to the present situation, our later work will be laying stress on studying what may couse the changes of lake sediments,and on analysing the correlation between environmental changes and human activities and its law. Besides based on these analyses,predicting the trend of future environmental changes and guarding against of harnessing all kinds of unfavourable factors to human exists, maybe the main aspect in the study of elemental geochemistry in lake sediments