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The Deep Hydrocarbon Cycle: From Subduction to Mantle Upwelling

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Abstract

Experimental results and geological observations suggesting the existence of a deep hydrocarbon cycle are presented. During immersion hydrocarbons accumulated in the Earth’s crust in the slab generally maintain stability to a depth of 50 km. With deeper immersion, the hydrocarbon fluids contact the surrounding ferrous minerals forming a mixture of iron hydride and iron carbide on the depths of 100–290 km. Iron carbide transported into the asthenosphere by convective flows can act as carbon donors and react with hydrogen donors presented in the asthenosphere and form an aqueous-hydrocarbon fluid. This fluid can migrate through deep faults into the Earth’s crust and form oil and gas deposits.

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Correspondence to V. G. Kutcherov.

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Translated by D. Voroshchuk

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Kutcherov, V.G., Dmitrievsky, A.N., Ivanov, K.S. et al. The Deep Hydrocarbon Cycle: From Subduction to Mantle Upwelling. Dokl. Earth Sc. 492, 338–341 (2020). https://doi.org/10.1134/S1028334X20050098

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  • DOI: https://doi.org/10.1134/S1028334X20050098

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