Publications

The Baribis Thrust System, which is located in the foreland zone near the back-arc basin, is the result of Neogene compression related to the subduction of the Indo-Australian plate into the Eurasian plate. Stratigraphic and structural information from field mapping was acquired from two locations in the Sumedang region and covering about 150km2 of area. This information was used to construct an integrated geological and structural map. Geological mapping focuses on direct structural interpretation from field-observed structural element data that is then used as raw data in kinematic and dynamic analysis.The main purpose of this paper is to discuss the structural analysis related to the Imbicrate thrust system in order to produce geologically realistic models which correlate with subsurface determinations derived from balanced crosssections. The Baribis Thrust-fold comprises of an array of structural elements, such as reverse faults, tear faults, and folds that are geometrically and kinematically linked. These associated structures develop in sequence during a single deformation with a NE - SW direction above the basal decollement or detachment zone with intervals at l150 - 2500 m of depth. Geological restoration was applied in order to conserve the areas balance, consistency of bed length, and consistency of fault shape in order to visualize the distribution of stratigraphic units prior to deformation. The 31% - 40% of shortening measured from the balanced cross-section restoration which illustrates the magnitude of the compressive forces in the area. Subsurface interpretation from the balanced crosssection can be applied as an integrated method in every foreland basin hydrocarbon play. This integrated analysis should be assisted by sandbox modeling to provide clearer images of thrust and fold configuration as it relates to the imbricate thrust system and to predict structural control on hydrocarbon traps.