Penerapan Second Vertical Derivative (SVD) Pada Data Gravitasi Untuk Mengidentifikasi Keberadaan Patahan Di Sepanjang Pegunungan Serayu Selatan Kabupaten Banyumas

Abstrak

The research using gravity data has been done to to find out the structure that can cause disaster due to geological activity along Serayu Selatan Mountain Banyumas Regency. The data that used in this research was a topography data obtained from Scripps Institution of Oceanography, University of California San Diego and the map of complete bouger anomaly Banyumas Regency. Data processing is begun by  digitized  to obtain a complete bouger anomalies. Upward Continuation method was used to separate regional and residual anomaly. The analysis of SVD was performed to determine of fault. Subsurface modeling was performed using 2 ½ D Talwani method in grav2DC program. SVD analysis shows there is a fault in the surrounding mountains of South Serayu, Banyumas. Modeling shows that structural fault in this research had a dip that varies between 60⁰ to 72⁰. The fault lies in contact Halang formation with breccia member of Halang formation.  The type of fault identified is the fault type down with the slope of the rock layer <20⁰