| 云南程海现代沉积物环境记录研究 |
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| 引用本文： | 陈敬安,万国江.云南程海现代沉积物环境记录研究[J].矿物学报,2000,20(2):112-116. |
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| 作者姓名： | 陈敬安 万国江 |
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| 作者单位： | 中国科学院地球化学研究所,环境地球化学国家重点实验室,贵阳,550002 |
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| 基金项目： | 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 |
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| 摘 要： | 本文通过对程海沉积物Ｃ、Ｈ、Ｎ等元素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，发现它们增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主为化明显以历了两个不同的阶段，但整体上程海水位一直呈下降趋势，反映区域气候整体上向干旱化方向发展。
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| 关 键 词： | 湖泊沉积物 水位波动 气候变化 程海 |
ENVIRONMENTAL RECORDS IN RECENT SEDIMENTS OF LAKE CHENGHAI, YUNNAN PROVINCE |
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| Chen Jing'an,Wan Guojiang.ENVIRONMENTAL RECORDS IN RECENT SEDIMENTS OF LAKE CHENGHAI, YUNNAN PROVINCE[J].Acta Mineralogica Sinica,2000,20(2):112-116. |
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| Authors: | Chen Jing'an Wan Guojiang |
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| Abstract: | 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. |
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| Keywords: | lake sediment H/C C/N lake level fluctuation climate change Lake Chenghai |
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