Subsurface Model Based Interpretation of One-Dimensional Magnetotelluric Data at Universitas Padjadjaran

摘要

Universitas Padjadjaran (UNPAD) Jatinangor region, according to general geology composed with sedimentary rocks that covered with a very thick volcanic rocks products. To know more clearly the boundaries of ithas measured by the one of deep geophysical method that is magnetotelluric method (MT). This method which utilize natural sources of electromagnetic waves to induce the rock below the earth's surface where the response is measured at the surface of the amount of electric and magnetic fields, and then obtained variation from the resistivity of rock value vertically. The results from interpretation of one dimensional magnetotelluric data gives information of rock boundary in subsurface that is follows: unit A (3-89 Ωm) with a thickness of 600 m and unit B (21-156 Ωm) with thickness more than 2500 m. This low resistivity value (under 1000 Ωm) suggests that correlated with sedimentary rocks, such as clay, tuff, sand, and weathered rocks. Further studies are necessary for this condition such as groundwater recharge, soil and rock stability, and disaster management.