【摘要】 考虑两期纯剪切变形成因的骨节状石香肠。假设骨节缝处香肠层的厚度近似等于香肠层的原始厚度,再根据等面积法原理恢复骨节状石香肠层的原始长度,求得石香肠层的拉伸有限应变,并采用物理模拟方法对骨节状石香肠等面积法进行了检验,误差范围分别为3.23%,2.84%,3.94%和6.82%。将该种方法应用于湖北铁山含骨节状石香肠岩石的有限应变测量,得到石香肠层的伸长有限应变值为33.80%~48.22%。再利用矩形断裂石香肠对骨节状石香肠应变测量结果进行检验,取得比较一致的结果。并将两期构造变形的岩石有限应变进行了分离。更多还原

【Abstract】 The authors have taken the bone-shaped boudins of two different stages into account.With the assumption that thickness of joints of the ’bone’ is approximately the same as the original thickness of the layers of the boudins,the original length of the boudins has been reconstructed with the equal-area method to measure their finite strain.Meanwhile,this equal-area method is demonstrated by physical modeling,showing that the errors are 3.23%,2.84%,3.94% and 6.82%,respectively.This new strain gauge is successfully applied in the finite strain determination of rocks embedded bone-shaped boudins and developed in Tieshan,Hubei,indicating the extension finite strain of the layers ranges from 33.80% to 48.22%.This result is relatively consistent to the other method applied in the measurement of the boudins’ finite strain.Furthermore,the authors have also successfully segregated the finite strain in two structural deformation periods.更多还原