Acta Scientiarum Naturalium Universitatis Pekinensis

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An Approach to Paleoclimate-Reconstruction by Clay Minerals

CHEN Tao, WANG Hejin, ZHANG Zuqing, WANG Huan   

  • Received:2003-11-26 Online:2005-03-20 Published:2005-03-20



Abstract: Clay minerals are widely applied in reconstructing paleoclimate, and many analysis methods are involved. Among them the X-ray diffraction analysis(XRD) is mainly used to confirm clay mineral assemblages and their crystallinity; chemical analysis and electronic microscope are used to study the source, the genesis and the evolvement process of clay minerals; radioactive isotopes analysis can make up the relationship between the time and space which is based on the climate index and the chronology; Hydrogen and oxygen isotopes also provide important evidence for reconstructing paleoclimate. This paper summarizes what paleoclimate information is contained in clay minerals, and it is intent to use clay minerals synthetically as the means to reconstruct paleoclimate.

Key words: Clay minerals, paleoclimate, XRD, chemical analysis, electron microscopy, isotopes

摘要: 利用黏土矿物重建古气候近年来得到了广泛的应用,其分析测试方法较多。其中,X射线衍射分析主要用来确定黏土矿物组合及其含量以及某些黏土矿物的结晶度;化学分析、电镜分析主要用于黏土矿物的来源、成因、演变过程的研究;放射性同位素的研究使气候指标和年代学建立起时间和空间上的联系;而氢氧同位素分析亦能对古气候重建提供重要佐证。本文旨在综述各种研究方法所能提供和揭示蕴藏于黏土矿物中的古气候信息,以期全面综合地利用黏土矿物为手段来重建古气候。

关键词: 黏土矿物, 古气候, X射线衍射分析, 化学分析, 电镜分析, 同位素

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