| 用于同位素测年的自生伊利石分离纯化流程探索 |
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| 关键词:authigenic illite separation and purification XDR crystallinity analysis |
| 基金项目:国家重点基础研究发展规划(2001CB409807)，国土资源部“同位素测年新方法新技术体系研究”(2000206) |
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| The Separation of Authigenic Illite from Detrital Illite in Sedimentary Rock for Ar Isotope Dating |
| The dating of sedimentary rock has in part been hampered by the problem of complete separation of authigenic illite from detrital illite. Taking the clay minerals of Changxing area in Zhejiang Province as an example, this paper describes the separation procedure of authigenic illite from detrital illite, with all the grain size fractions analyzed by X-ray diffraction (XRD). The result shows that impurities such as quartz, potassium feldspar, albite, calcite and dolomite decrease gradually with the reduction of grain size, and there are no detectable impurities in the <0.2 μm fraction. It is especially striking that the content of mixing I/S in the samples 5-4,6-3 and 6-4 is 100%, which shows that the separation is relatively successful. |
| ZHANG Yan,CHEN Wen,YANG Hui-ning.2003.The Separation of Authigenic Illite from Detrital Illite in Sedimentary Rock for Ar Isotope Dating[J].Acta Geoscientica Sinica,24(6):622-626. |
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