The very low-frequency SFGPR system and its application on active fault detection

摘要

In Changchun region, Northeast of China, the soil layer with low resistivity has the depth of 10-20 meters and it is difficult for the commercial GPR system to detect bedrock. In this paper, we investigate an active fault detection by a very low frequency SFGPR system which including E5071B VNA, controlling program developed with VBA and low-frequency wire antenna. The results from SFGPR clearly show the undulation of the bedrock and from which we interpret the position and depth of the fault assisted by resistivity survey.