Economic and Environmental Geology (자원환경지질)
- Volume 10 Issue 1
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- Pages.37-48
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- 1977
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- 1225-7281(pISSN)
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- 2288-7962(eISSN)
A Study on the Structural Deformations in the Sedimentary Layer Resulted from Magma Intrusion
마그마관입에 의한 상부퇴적층의 변형에 관한연구
- Min, Kyung Duck (Dept. of Geology, Yonsei University) ;
- Kim, Won Young (Dept. of Geology, Yonsei University)
- Published : 1977.03.31
Abstract
The earth's crust is unceasingly undergoing deformations because of the forces acting upon it. The relationship between the tectonic forces and the resulting deformations are found from the states of stresses in the earth's crust induced by these forces. The study has been attempted to analyze the deformations of the overlying sedimentary layers, which are deformed by the magma intrusion along its lower boundary. The elastic model is constructed to analyze the geologic structures, by means of the theory of elasticity, and then the appropriate boundary conditions are given. The solution of the Airy stress function which satisfies the given boundary conditions is derived from the analytic method. The internal stress distributions of the deformed elastic model layer are portrayed by principal stress trajetories, and then the corresponding potential faults and joints systems are predicted from the Coulomb-Mohr failure criterion. The internal displacement distributions are shown by the calculated displacement components vectors, namely horizontal, vertical and net components. Results of the numerical calculations show the developments of some geologic structures as follows; (1) one set of shear joints and or two sets of shear joints which are oppisite directions, and one set of extension joints parallel to the
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