褶皱叠加型石香肠基质层有限应变分析

发布时间：2018-03-28 08:17

  本文选题：构造地质学　切入点：褶皱叠加型骨节状石香肠　出处：《中国科技论文》2016年21期

【摘要】：以湖北铁山褶皱叠加型骨节状石香肠为研究对象,从微观尺度研究基质层的二维应变特点。通过微观应变测量与统计分析,研究褶皱叠加型骨节状石香肠的成因机制。使用Straindesk软件对石香肠基质层进行有限应变测量分析和统计,使用Surfer软件生成运动学涡度等值线分布图、真应变差等值线分布图、岩层厚度比等值线分布图。对所获得数据资料的研究表明,早期的2次纯剪切作用形成骨节状石香肠构造,晚期受到纵弯褶皱作用,由于岩层间力学性质的差异,在香肠构造的基础上叠加褶皱。该褶皱叠加型骨节状石香肠的基质层应变受能干层控制,基质层的应变大小与其距离能干层的远近有负相关趋势。由于骨节缝处脉体的能干性较香肠体更强,因此形成骨节颈。
[Abstract]:This paper studies the two-dimensional strain characteristics of the matrix layer in Hubei Tieshan fold superposition sausage. The microcosmic strain measurement and statistical analysis are used to study the characteristics of the two-dimensional strain of the matrix. In this paper, the genetic mechanism of folded superposition bone sausage is studied. The finite strain measurement and statistics of the base layer of the sausage are carried out with Straindesk software, and the kinematic vorticity isoline distribution map and the true strain difference isoline distribution map are generated by using Surfer software. The study of the obtained data shows that the sausage structure formed by the two early pure shear processes was subjected to longitudinal bending fold in the late stage, due to the difference of the mechanical properties between the strata. Superimposed folds on the basis of sausage structure. The matrix strain of the superimposed bone nodal sausage is controlled by the competent layer. There is a negative correlation between the strain of matrix layer and its distance from the competent layer. Because the ability of veins at the suture of bone is stronger than that of sausage, the neck of bone segment is formed.
【作者单位】： 中国地质大学(武汉)地球科学学院;中国地质大学(武汉)华中构造力学研究中心;湖北工业大学电气与电子工程学院;
【分类号】：P584
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本文编号：1675496