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中国沙漠 ›› 2004, Vol. 24 ›› Issue (2): 136-143.

• 研究论文 • 上一篇    下一篇

萨拉乌苏河流域末次间冰期全球变化区域响应的主元素记录

吕玉晓1,2, 李保生1,2, 靳鹤龄3, David Dian ZHANG4, 余雪飞1,2   

  1. 1. 华南师范大学 地理系, 广东 广州 510631;
    2. 中国科学院 地球环境研究所黄土与第四纪地质国家重点实验室, 陕西 西安 710061;
    3. 中国科学院 寒区旱区环境与工程研究所, 甘肃 兰州 730000;
    4. 香港大学 地理与地质学系, 香港
  • 收稿日期:2003-08-25 修回日期:2003-10-26 出版日期:2004-04-20 发布日期:2004-04-20
  • 作者简介:吕玉晓(1978-),女(汉族),硕士研究生,主要从事环境及其演变的研究工作。E-mail:li-@163.net
  • 基金资助:
    国家自然科学基金资助项目(49971009); 中国科学院知识创新工程重要方向项目(KZCX2-SW-118); 国家重点基础研究发展规划项目(G2000048701)共同资助

Major Element Record in Salawusu River Valley Responding to Global Change during Last Interglacial Period

LV Yu-xiao1,2, LI Bao-sheng1,2, JIN He-ling3, David Dian ZHANG4, YU Xue-fei1,2   

  1. 1. Department of Geography, South China Normal University, Guangzhou 510631, China;
    2. State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710061, China;
    3. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, 730000, China;
    4. Department of Geography and Geology, HongKong University, HongKong, China
  • Received:2003-08-25 Revised:2003-10-26 Online:2004-04-20 Published:2004-04-20

摘要: 萨拉乌苏河流域米浪沟湾剖面末次间冰期层系记录了8.5个风成的古砂丘砂与河湖相或和古土壤构成的沉积旋回。通过对该层系主元素含量分布规律的分析, 认为所述沉积旋回主要是由干湿寒暖气候旋回波动所致。研究亦表明, 末次间冰期层系60LS-82S可进一步划分为5个层段, 它们在时间和气候的主要阶段上与氧同位素5阶段中之5a、5b、5c、5d、5e诸亚段相近。不仅如此, 若干反映冷干气候的风成砂丘砂堆积层位与末次间冰期GRIP冰芯δ18O及西太平洋暖池planktonicδ18O记录的冷凉事件, 特别是与黄土高原记录的9次粉尘事件在时间上具有很好的对应关系。

关键词: 末次间冰期, 元素-气候旋回, 氧同位素阶段对比, 10期砂丘堆积事件

Abstract: The last interglacial strata sequence of Milanggouwan stratigraphic section in the Salawusu River valley has recorded 8.5 sedimentary cycles of aeolian sand alternatively interlaid with fluvio-lacustrine facies or paleosols. After analyzing the distributing regularity of major element contents in the strata, we considered that these sedimentary cycles were chiefly induced by cold-dry and warm-humid climate fluctuations. The study also showed that in the Milanggouwan section, the 60LS-82S depositional sequence formed during the last interglacial period can be further divided into five phases which closely match δ18O5a、δ18O5b、δ18O5c、δ18O5d、δ18O5e in periods and chief climatic stages. Moreover, many horizons of paleo-sand-dune reflecting cold-dry climate temporally corresponded to those cold events recorded by δ18O in GRIP Ice Core and planktonic δ18O in the warm pool of the Western Pacific Ocean, especially to the 9 aeolian dust(loess) events happened in the Loess Plateau of China during the Last Interglacial period.

Key words: last interglacial period, element-climate cycle, correlation with the oxygen isotope stage, 10 dune-heaped events

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