Structure Analysis Gunung Benau Karst Area by Using mSTA and FFD, North Kalimantan, Indonesia

Abstract

The formation of Gunung Benau is associated to the geological structural process. This study uses remote sensing using DEMNAS data resampled at 10 meters. The DEMNAS data will be modeled using the modified Segment Tracing Algorithm (mSTA) and Fault Fracture Density (FFD) approaches. Surface geological mapping methods involve observations, descriptions, direct measurements, and field data recording of data appearances and geological conditions on the Gunung Benau. The structure which found in Gunung Benau is a shear joint with syncline and anticline folds and nine faults identified. The mSTA’s main lineament directions, Northeast-Southwest and Southeast-Northwest, are consistent with the area’s geological structure. The FFD shows that the highest density values occur in the central region of Gunung Benau, where faults are extensively exposed.