| 摘要: |
| 于1989年8月，在新疆巴里坤湖区进行多次野外调查和钻孔取样，将116块岩芯样用等离子发射光谱对各种微量元素和氧化物进行全面分析，以研究古气候与古环境的演变关系。研究得知，本区多数微量元素以碎屑形式机械迁移为主，因此，在地表径流较丰富的凉湿或冷湿环境，湖底沉积的元素相对富集；反之，在地表径流减少的暖干环境，元素富集减少。这种元素的迁移规律，表明干旱区内陆确存在冷湿暖干型的气候特征，不同于东部季风区元素的累积规律。 |
| 关键词: 新疆 巴里坤湖 元素 累积规律 古气候 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金资助，4870042号 |
附件 |
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| THE ACCUMULATING REGULATION OF DEPOSIT GEOCHEMISTRY OF BALIKUN LAKE, XINJIANG |
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Han Shuti1, Li Zhizhong2
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1.Department of Geography, Xinjiang University, Wulumuqi 830041;2.Departmen of Geography, Xinjiang Normal University, Wulumuqi 830041
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| Abstract: |
| Trace elements and some oxides in 116 sediments core samples taken in August, 1989 from Balikun Lake in northeastern Xinjiang were analysed using inductively coupled plasma spectrometry. Chemical elements are accumulated under the prevailing conditions of dry climate and little precipitation, strong physical weathering and slight undulation of topography. Most trace elements migrate mainly by means of debris element accumulation increased with increasing runoff during the cool or coldmoisture periods, but decreased with decreasing runoff during the warm-dry periods. Therefore, the migration and accumulation of chemical elements in arid areas are deeply affected by the alternation of cold-moisture and warm-dry inland climate. Lacustrine facies chemical elements in arid areas are very important bases for paleoclimate study because of their high resolution and high-sensitivity to paleoclimate. But the organic matter, although its indication of paleoclimate is clear, was complicatedly affected by many factors. So in order to show the distinctive regulation of accumulation and paleoclimatic significance of organic matter, comprehensive studies, combined with other paleoclimatic marks have to be made. |
| Key words: Xinjiang, Balikun Lake, Elements, Accumulation regulation, Paleoclimatic |
