[1]张宏亮,李世杰,于守兵,等.青藏高原全新世环境变化的兹格塘错元素地球化学沉积记录[J].山地学报,2009,(02):248.
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青藏高原全新世环境变化的兹格塘错元素地球化学沉积记录()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2009年02期
页码:
248
栏目:
山地学报
出版日期:
2009-03-15

文章信息/Info

作者:
张宏亮;李世杰;于守兵;申慧彦;沈德福;
中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室;中国科学院研究生院;南京水利科学研究院;
关键词:
青藏高原湖泊沉积全新世环境元素地球化学
文献标志码:
A
摘要:
兹格塘错是位于藏北高原腹地的一个封闭型湖泊,流域内没有现代冰川和永久积雪存在,其湖泊的水量平衡主要是大气降水和蒸发之间的平衡,因此其湖泊的变化过程可直接反映区域的气候变化。为了探讨该区域全新世的气候与环境变化过程,在其湖泊中心水深30m处钻取了一支深727cm的沉积岩芯,对沉积岩芯进行了元素地球化学分析,利用主成分分析得出影响沉积物化学组成的三个主要因子,主要受控于流域侵蚀因子和径流因子,区域背景作用因子所占比重很小。结合Mg/Ca的变化,其结果反映了全新世期间湖泊水体退缩与扩张,水质的浓缩与淡化的过程,揭示了兹格塘错流域气候的干湿变化,呈现暖干/冷湿气候组合模式;元素地球化学所反映出的湖面波...

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更新日期/Last Update: 2009-03-15