Publications

Sandbox modeling is an approach used to investigate the geometry of a structure and the time-related process of sedimentary rock deformation within a basin. Our model was based on surface and projected subsurface data that had been restored by palinspastic reconstruction. This experiment was clearly intended to observe fold-fault growth activities, illustrating possible trap development and fault compartments in a Fold-Thrust belt region. The Kendeng Fold-Thrust Belt is a representative, field observed object which was attempted to be simulated in a sandbox model experiment. Several field mapped, surface geological sections were restored in order to obtain shortening and strain values, which were then converted into our model's design. Quartz sand and Glass bead materials were analogically used to represent brittle and ductile deformation rocks, respectively. Palinspastic reconstruction results show that the Kendeng fold thrust belt developed via fault propagation folds and detachment folds with shortening of 46% and strains of 0.46. These tend to be formed by compensating effects of drag and bedding plane shortening above an detachment that are unassociated with a ramp. Both are types of fold induced trailing imbrication systems that formed a thrust fault compartmentalized, fold trap. Understanding fold mechanisms in each compartment of a thrust fault by sandbox experiments was thought to be a reasonable way to postulate possible structural traps' development in deeper zones of the Kendeng, Bogor and North Serayu fold thrust belts. Keywords: Sandbox modeling, Kendeng Zone, fold thrust belt, trap