Co-Evolution of Parallel Triple Subduction Systems in the New Guinea Region: A Systematic Numerical Study

A specific configuration of the global subduction system is parallel triple subduction. The widely accepted example New Guinea region, including a northward dip at Britain Trench (NBT), southward Trobriand Trough (TT), and North Solomon (NST). Questions regarding remain largely unexplored in terms factors controlling its initiation, duration, dynamics. Here, we used two-dimensional numerical models to study dynamics mechanism region. Four possible regimes were achieved: 1) double model, which includes forward jumping model (FSJ) polarity reversal (SPR) 2) tendency (TFSJ) (TSPR). By evaluating four with actual seismic data, suggest that pre-existing rupture length ocean–continent transition (OCT) determine formation TT, while NBT may be result rheological strength differences between Island Arc (SIA) Sea Basin (SSB); initial SSB can regulate competitive relationship TT NBT, also determines present-day inactive state TT. longer makes initiated independently, narrower will allow interaction during initiation NBT.