Deep hydrocarbon cycle

Research subject. Experimental modelling of the transformation complex hydrocarbon systems under extreme thermobaric conditions was carried out. The results obtained were compared with geological observations in Urals, Kamchatka and other regions. Material methods. materials for research a model system similar composition to natural gas condensate consisting mixture saturated hydrocarbons various iron-containing minerals enriched 57Fe. Two types high-pressure equipment used: diamond anvils cell Toroid-type chamber. experiments out at pressures up 8.8 GPa temperature range 593–1600 K. Results. According results, submerged subduction slab can maintain their stability down depth 50 km. Upon further immersion, during contact fluid surrounding iron-bearing minerals, iron hydrides carbides are formed. When react water asthenosphere, water-hydrocarbon is Geological observations, such as methane finds olivines from ultramafic rocks unaffected by serpentinization, presence polycyclic aromatic heavy ophiolite allochthons squeezed paleo-subduction zone good agreement experimental data. Conclusion. presented made it possible propose concept deep cycle. immersed Iron asthenosphere convective flows hydrogen contained hydroxyl group some or present form fluid. mantle migrate along faults into Earth’s crust multilayer oil deposits any lithological composition, genesis age. In addition carbide coming slab, contains carbon donors. These donors serve source hydrocarbons, also participating cycle, being an additional recharge total upward flow described cycle appears be part more general