Position of zoned Pt-bearing alkali-ultrabasic plutons in the southeast of Russia according to the seismic tomography data
1049 Several ring basic and ultrabasic plutons associated with commercial platinoid placers were identified in the southeastern part of the North Asian craton. According to the commonly accepted geodynamic models imitating the region formation and the seismic tomography data, the subduction processes affected the Asian–Pacific Ocean convergence zone in the Mesozoic initiated the development of the stagnated oceanic slab in the mantle transition zone. Its NE and SW boundaries likely coincide with the transform faults.