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用椭圆形颗粒测量应变椭圆的两组方法被应用于变形板岩和砂岩,并对其结果进行了比较.第一组方法包括斜率法和测量轴比的算术平均值法、几何平均值法、调和平均值法.第二组方法比较复杂,有Rf/φ法、Shimamoto和Ikeda法、Robin法和极图数学描述法.研究表明,在第一组方法中,在中等应变条件下,调和平均值法最接近应变比(R_s).在第二组方法中,由Robin法、Shimamto和Ikeda法、Rf/φ法及在很小程度上的数学极图法计算的R_s之间具有很好的线性关系.在具有与本文类似岩性及变形特点的变形岩石中,一条包括这些研究结果的曲线,使我们可以从颗粒轴比的调和平均值简单地计算出R_s.
Two sets of methods for measuring the strain ellipse with elliptical particles were applied to the deformed slate and sandstone and the results were compared.The first set of methods include the arithmetic mean of the slope method and the measured axial ratio, the geometric mean method, Harmonic mean method.The second group of methods is more complicated, there are Rf / φ method, Shimamoto and Ikeda method, Robin method and pole figure mathematical description.The study shows that in the first group of methods, under medium strain conditions, the harmonic average The value method is the closest to the strain ratio (R_s). In the second method, there is a good agreement between the Robin method, the Shimamto and Ikeda methods, the Rf / φ method and the R_s calculated to a very small extent In a deformed rock with lithology and deformation characteristics similar to those in this paper, a curve including these results allows us to simply calculate R_s from the harmonic mean of particle axial ratios.