Material composition of Verkhnechonsky field basement rocks and their reflection in the "basement–sedimentary cover" surface structure by seismic data (Siberian platform)
It is stated that Verkhnechonsky field basement is composed by a complex of several types of rocks (biotite granite, biotite metagranites, cataclastic granites and metagranites, metasomatically altered granite cataclasites, metasomatically altered mylonites), representing a succession of metamorphic transformation of granite substrate. Petrological zonal distribution of rocks relative to the anomalies, identified on the seismic structural plan by OG F is set. Presence of weathering crust at the studied area of Verkhnechonsky field is not confirmed. Areas mylonitization and cataclasis are potential reservoirs within the limits of a crystalline basement.