On the Resolution of the Darai Limestones by Two-Dimensional MT Forward Modeling

Abstract

The PNG data have been analysed to determine the presence of the lower Darai limestones. As a first step, Groom and Bailey decomposition method was applied, which indicated that the electrical structure was approximately two-dimensional and striking N120°. Accordingly, two-dimensional forward modeling of the rotated data was performed. The final model showed the resistivity distribution with alternating resistive Darai limestones and conductive Ieru stratigraphic units. In particular, the model exhibited the resistive lower Darai limestones along the whole profile, which was the question posed at the MT-DIW2. A sensitivity test was performed to ensure the presence of the lower Darai limestones was resolvable.