Geological evolution of the northern Mid Kuril trough based on seismic facies analysis

The model of geological evolution an interarc basin, which is the north-east ending Mid Kuril trough located on continental slope Kuril-Kamchatka trench, was constructed. Seismic facies analysis first applied to define sedimentation conditions in a deep water trench. based 2D CDP reflection seismic data obtained by Dalmorneftegeophysica JSC 2014. According modeling results, basin began form Late Cretaceous and passed several stages. Initial subsidence local crust area incipient changed over its further separation from adjacent waters Sea Okhotsk Pacific Ocean various volcanic formations framing contour. merged as result submersion structures east at final stage during Oligocene-Middle Miocene. This directly related global processes associated with ocean trench appearance such inherent along valley bottom line accompanied increase inclination angle flanks. It concluded that origination time approximately corresponds Miocene boundary.