F.H. Hisyam, Q.D.T.F. Fiandani, Z.F. Zuhrotul Firdaus
Research has been done in North East Java Basin using gravity method. The data which be processed on this research are obtained from Bureau Gravimétrique International (International Gravimetric Bureau). Initial data processing yields Complete Bouguer Anomaly map which is filtered using Upward Continuation to separate regional and residual anomaly. The residual anomaly data was processed using derivative analysis include First Horizontal Derivative (FHD) and Second Vertical Derivative (SVD). The angle which used in FHD is 135o. Result from this analysis show six fault structures which has NE - SW orientation. The structures are normal fault which associated with half graben. The high area (ridge zone) is shown with high value Residual Bouguer Anomaly (RBA) ranged 6 until 11 mGal. The low area (trough zone) is shown with low value RBA ranged-16 until-8 mGal. These results appropriate with geological data of the research area.
Brawijaya University, Indonesia
