| 碎裂岩的分数维分析:理论、方法及地质意义 |
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| 引用本文： | 赵中岩,王毅.碎裂岩的分数维分析:理论、方法及地质意义[J].地质科学,1992,0(3):282-290. |
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| 作者姓名： | 赵中岩 王毅 |
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| 作者单位： | 中国科学院地质研究所 |
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| 摘 要： | 理论研究表明具有自相似性的几何分裂体可以用分数维描述,其分数维值D的大小取决于碎裂模式。碎裂岩粒度分布具有自相似性,可以用D值定量描述。D值的求法有三种,即粒径法、面积法和体积法。对天然变形的断层岩分数维分析表明,D值随断层岩形成的地质环境(温度、压力和应变量等)变化,如围压增加,D值增大;应变量增加,D值增大,并趋向定值。
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| 关 键 词： | 碎裂岩 分数维 |
| 收稿时间： | 1990-06-01 |
| 修稿时间： | 1990-06-01; |
FRACTAL ANALYSIS OF CATACLASTIC ROCKS:THEORY,TECHNIQUES AND APPLICATIONS |
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| Zhao Zhongyan Wang Yi.FRACTAL ANALYSIS OF CATACLASTIC ROCKS:THEORY,TECHNIQUES AND APPLICATIONS[J].Chinese Journal of Geology,1992,0(3):282-290. |
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| Authors: | Zhao Zhongyan Wang Yi |
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| Institution: | Institute of Geology, Academia Sinica, Beijing |
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| Abstract: | Theoritical study shows that self-slmilar cataclastic processes produce cataclastic rocks with characteristic fractal dimension,which depends on the modes of deformation.A mode of deformation is defined by base'B'and number of fragile elements as a parent cell each time is broken into next order elements.Fractal dimension D of cataclasite can be expressed in terms of particle size(diameter,sectional area and volume)and their distribution frequency:D= -slope(diameter-frequency),D=-2 slope(area-frequency),D=-3 slope(volume-frequ- ency),where slope is the slope of regression line for particle size vs frequency in a log-log co- ordinates. Three techniques can be used in particle distribution analysis,namely Sammis'technique image analysis and sieving technique. Study on naturally deformed catalclasites suggests that fractal dimension D increases with increasing strain and reaches a constant for a specific mode of deformation.D also increases with increasing depth of deformation.It is pointed out that strain,confining pressure and strain rate are probably the main factors that contribute to D value. |
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| Keywords: | Fractal Cataclasite |
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