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晚第三纪以来黄土高原风积序列的压实校正及其古气候意义
引用本文:孙有斌,周杰,安芷生.晚第三纪以来黄土高原风积序列的压实校正及其古气候意义[J].海洋地质与第四纪地质,1999,19(4):51-58.
作者姓名:孙有斌  周杰  安芷生
作者单位:中国科学院,黄土与第四纪地质国家重点实验室,西安,710054
基金项目:国家自然科学基金!49894170,中科院“九五”重大项目!KZ-951-Al-402,国家科委攀登项目!95-预-40
摘    要:晚第三纪以来黄土高原完整连续、高分辨率的风尘堆积序列为研究以冬、夏季风组合为特征的东亚季风环流长期演化提供了很好的气候信息载体。利用高压固结试验结果,基于高分辨申的磁化率和容重测量及相关性分析,初步探讨了黄土、古土壤及红粘土不同地层单元的压缩特性,校正了压实作用对容重的影响,获得了更真实的东亚季风气候演化信息。有助于深入探讨晚第三纪以未东亚李凤阶段性演化特征及其与太阳辐射、全球冰量变化、青藏高原阶段性隆升等气候控制因子之间的密切关系。

关 键 词:风积序列  压实校正  古气候意义  晚第三纪  黄土高原

THE PALEOCLIMATE SIGNIFICANCE RECORDED BY THE COMPACT-CORRECTED CLIMATE PROXY OF LATE TERTIARY EOLIAN SEQUENCE ON THE CHINESE LOESS PLATEAU
SUN Youbin,ZHOU Jie,AN Zhisheng.THE PALEOCLIMATE SIGNIFICANCE RECORDED BY THE COMPACT-CORRECTED CLIMATE PROXY OF LATE TERTIARY EOLIAN SEQUENCE ON THE CHINESE LOESS PLATEAU[J].Marine Geology & Quaternary Geology,1999,19(4):51-58.
Authors:SUN Youbin  ZHOU Jie  AN Zhisheng
Abstract:The late Tertiary eolian sequence on the Chinese Loess Plateau has been proved as an excellent terrestrial paloeclimate recorder. Because of various pedogenesis and compacting experiences, the physical and mechanical properties of the loess-paleosol layers have changed with increase of buried depth,and thus measuring climate proxy such as the dry bulk density and sedimentation rate can't reveal the real climate conditions during the sedimentary history. Based on the compacting experiment results and high-resolution magnetic susceptibility and dry bulk density measurements,this paper gives a preliminary discuss about the compaction properties of different soil layers, and well reveals the East Asia monsoon climate change recorded by the compact-corrected climate proxy.
Keywords:eolian sequence  compaction properties  dry bulk density  late Tertiary  Loess Plateau
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