Trap gases as evidence of the Tunguska Basin petroleum potential

Materials on the gas potential of the Tunguska syneclise traps are systemat ized. It is shown that the hydrocarbon components of the trap gases and sed imentary rocks are similar. The high contents of methane homologues and low ratios of methane to its homologues evidence the petroleum potential of th e Tunguska Basin sedimentary cover. Data for traps are more convincing, bec ause all their gas hydrocarbons are allochthonous, migrated mainly from hyd rocarbon pools.