| 三趾马红粘土的粒度组成特征及其地质意义 |
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| 引用本文： | 陈丹玲.三趾马红粘土的粒度组成特征及其地质意义[J].西北地质科学,1996,17(2):1-5. |
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| 作者姓名： | 陈丹玲 |
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| 作者单位： | 西北大学地质系 |
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| 摘 要： | 黄河中游三趾马红粘土的粒度组成特征是以粉土（０．０５－０．００５ｍｍ）粒级为主，且粗粉土（０．０５—０．０１ｍｍ）粒级含量为所有粒级含量之冠，缺乏大于０．２５ｍｍ颗粒．主要粒级百分含量、粒度分布概率曲线显示出与黄土及现代风尘极为相似的面貌，表明三趾马红粘土为风力搬运的粉尘堆积．
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| 关 键 词： | 三趾马红粘土，粒度，成因，古气候 |
THE FEATURES OF GRAIN-SIZE DISTRIBUTION AND GEOLOGICAL SIGNIFICANCES FOR HIPPARION RED BEDS |
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| Chen Daming.THE FEATURES OF GRAIN-SIZE DISTRIBUTION AND GEOLOGICAL SIGNIFICANCES FOR HIPPARION RED BEDS[J].Northwest Geoscience,1996,17(2):1-5. |
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| Authors: | Chen Daming |
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| Abstract: | In middle reaches of the Huanghe River, the red beds developed on various underlay rocks show approximately the same grain-size distribution, the major fraction of red beds is 0. 05- 0. 005 mm, which accounts for about 45% - 60. 5%; the next is <0. 005 mm fraction, accounting for about 30% - 50%. there are almost no grains greater than 0. 20 mm.These features and its grain-size distribution curves have the same form as loess and modern dust. This f.ct favors the origin of red beds as an eolian deposit in arid and semi-arid area. |
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| Keywords: | Hipparion red beds Grain-size distribution Eolian deposit |
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