Fig. 9. Gravity model along the Dongducheon Fault line. A 2D gravity forward model is suggested by using all available constraints from gravity field (A, B) and geologic map (A), and rock type with densities (C). The final model indicates that the prominent gravity highs (HG1 and HG2 in A and B) are mainly caused by the high density material (HD1 and HD2 in C), which may be uplifted from the basement of the Gyeonggi Massiv (GM). The vertical stress distribution (D) at depth of 4.5 km shows a prominent vertical stress change from 3 MPa to –3 MPa in the area between EE1 and EE2 that can be explained by the density difference between En echelon lines.

Econ. Environ. Geol. 2022;55:633-48 https://doi.org/10.9719/EEG.2022.55.6.633

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