Figure 2. Initial model and modeling results. (a) Initial model setup with model geometry, layer characteristics, and thermal configuration. (b) Three cases show different results: no subduction (Experiment 5); subducted slab did not reach a depth of 260 km within 10 myr (Experiment 7); subduction depth of 260 km within 10 myr (Experiment 6). (c) Variation of trench retreat velocities with time for experiments with different mechanism (Density of continental lithospheric mantle =3275 kg/m3; Ocean-continent transition angle=30°). (d) Trench retreat velocity of the coupled model with depth 660 km, 400 km, 350 km, 300 km, 250 km, 200km. West, Centre, East indicate the trench retreat velocity on the western side, centre and eastern side of Celebes Sea, respectively.
Table1. Parameters and Descriptions of Numerical Experiments