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风成沉积石英绿光释光测年的单片技术 被引量:8
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作者 赖忠平 周杰 +1 位作者 卢演俦 A.K.Singhvi 《中国沙漠》 CSCD 北大核心 1999年第4期403-406,共4页
运用再生法进行单片技术测年所面临的主要问题是感量变化。论文探讨了石英绿光释光测年中对感量变化进行校正的方法,然后运用单片技术对沙漠黄土边界带风成沉积沙样进行等效剂量测定。结果表明。
关键词 光释光测年 单片技术 风成沉积物 石英绿
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CLAY MINERAL ASSEMBLAGES AND THEIR IMPLICATIONS IN SHIHEZI FORMATION FROM THE HUAIBEI COAL-BEARING STRATA
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作者 黄文辉 许光泉 刑军 《Journal of Coal Science & Engineering(China)》 1998年第2期38-41,共4页
Clay mineral assemblages in Shihezi Formation of Huaibei coal-bearing strata are determined by X-ray diffraction and Differential Thermal Analyzer, that is restated to the sediment faces and climatic changes in the so... Clay mineral assemblages in Shihezi Formation of Huaibei coal-bearing strata are determined by X-ray diffraction and Differential Thermal Analyzer, that is restated to the sediment faces and climatic changes in the source area, and to a lesser extent, alterations during burial diagenesis. In the Upper Shihezi Formation, the clay fraction is dominated by kaolinite in northern part of the coal field, which was formed in alluvial sediment environment. But in the South of Huaibei coal field, the clay mineral assemblage consists of mainly illite that reflects the influence of sea water. The predominately kaolinite and sederite composition of the clay fraction in the lower Shihezi Formation sediments documents less relief and gentle erosion of kaolinite rich soils developing under warm source area. In the lower part of Shihezi Formation, some chlorite is detected, which suggests transformation of illite or kaolinite to chlorite under conditions of burial diagenesis. 展开更多
关键词 Huaibei coal field Shihezi Formation clay mineral assemblage
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