Hanief Ajib Abdalla1,2* , Nasywa Dhia Khalifa1,3, Cyntia Adrian Lestari1,3, M Maruf Mukti4, Akhmad Khahlil Gibran2, Fadlin2
1 MBKM Program, Geological Resources BRIN, Bandung 40135, Indonesia
2 Geological Engineering, Jendral Soedirman University, Purwokerto, Indonesia
3 Geological Engineering, Padjadjaran University, Jatinangor, Indonesia
4 Geological Resources, BRIN, Bandung 40135, Indonesia
http://dx.doi.org/10.55981/risetgeotam.2024.1311
Abstract
Based on analyses of published geological cross sections along the Baribis Fault, we briefly review several possible mechanisms of this backarc thrust that developed behind the volcanic arc in western Java. There is no general agreement regarding the mechanisms of the backarc thrust. Therefore, the origin of this fault remains uncertain. Previous works proposed that the backarc thrust in western Java may have developed as deformation of paleo-accretionary wedge sediments behind a continental backstop, inverted normal fault, northward migrating thrust belt, and thrusting due to gravitational sliding of the volcanic arc. However, evidences supporting those mechanisms still need to be elucidated. Detailed examination of the available geological data might suggest that backarc thrusting in western Java may have formed due to stress transfer through rigid arc blocks. The far-field stress from the subduction zone is propagated through remnants and modern volcanic arcs and finally, deformed sediments in the Bogor Trough that nucleated as backarc thrust.
Keywords: Baribis Fault, backarc thrust, stress transfer, subduction, volcanic arc
Tektonesiana 