云南程海现代沉积物环境记录研究  

ENVIRONMENTAL RECORDS IN RECENT SEDIMENTS OF LAKE CHENGHAI, YUNNAN PROVINCE

作　　者：陈敬安[1] 万国江[1] 

机构地区：[1]中国科学院地球化学研究所

出　　处：《矿物学报》2000年第2期112-116,共5页Acta Mineralogica Sinica

基　　金：中科院重大项目专题!(KZ95 1A14020604);国家自然科学基金!(批准号 :49894170)联合资助

摘　　要：本文通过对程海沉积物C、H、N等元素的含量及其比值的综合分析 ,辨识了程海沉积物有机质H/C及C/N值的环境指示意义 ,发现它们均可作为程海水位波动及区域气候干湿变迁的替代性指标。研究结果表明 :程海的水位和区域气候干湿变化明显经历了两个不同的阶段 ,但整体上程海水位一直呈下降趋势 。Based on fine analysis of the contents of carbon, hydrogen, nitrogen and their ratios, this paper reveals the environmental significance of H/C and C/N ratios in lacustrine organic matter in Lake Chenghai. The result shows that these two ratios can be both used as substitutive indices of lake level fluctuations. The lake level and regional climate in Lake Chenghai have experienced two different periods, but, as a whole, the lake level trends to fall, reflecting the regional climate has become drier recently.

关 键 词：湖泊沉积物 水位波动 气候变化 程海 

分 类 号：P467[天文地球—大气科学及气象学]