MECHANICAL ANALYSIS OF THE DIKE PATTERN OF THE SPANISH PEAKS AREA, COLORADO
MECHANICAL ANALYSIS OF THE DIKE PATTERN OF THE SPANISH PEAKS AREA, COLORADO
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科罗拉多州西班牙峰地区堤坝格局的力学分析
DOI：
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发表时间：
1957
期刊：
影响因子：
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通讯作者：
H. Odé
中科院分区：
文献类型：
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作者：
H. Odé
如果假设存在一个区域应力系统，其中最大主压力的方向平行于叠加在局部应力系统上的岩墙图案所表现出的对称线，那么就有可能通过应力分析来解释科罗拉多西班牙峰周围引人注目的岩墙图案的形状。这种局部应力系统是由西班牙峰的侵入体施加的静水压力造成的。为简化计算，假定在西西班牙峰位置有一个圆孔。西班牙峰以西的山脉前沿提供了一个未知的边界条件，但可以通过假设图像源来描述，并获得令人满意的结果。根据安德森（1951）提出的构造应力场与岩墙型式关系的假设，建立了一种新的构造应力场与岩墙型式的关系模型。3)然后可以计算堤图案。这种计算的堤坝图案同意在许多方面与观察到的堤坝图案。
It is possible to explain the shape of the remarkable dike pattern surrounding the Spanish Peaks, Colorado, by an analysis of stresses if a regional-stress system in which the direction of greatest principal pressure was parallel to the line of symmetry exhibited by the dike pattern superposed on a local-stress system is assumed. This local-stress system is caused by hydrostatic pressure exerted by the intrusive mass of the Spanish Peaks. For simplification of the computations a circular hole is assumed at the position of West Spanish Peak. The mountain front west of the Spanish Peaks provides an unknown boundary condition, which however can be described with satisfactory results by the assumption of an image source. On the basis of the assumption that the relation between stress field and dike pattern is the one proposed by Anderson (1951, Chap. 3) it is then possible to compute the dike pattern. This computed dike pattern agrees in many respects with the observed dike pattern.