Velocity of the subduction of the Russian platform under the Siberian one in the Paleozoic by the distribution of mantle hydro-carbon upwelling zones in Western Siberia

Category: 16-4
S.V. Gavrilov, A.L. Kharitonov

UDC 550.311

 S.V. Gavrilov(1), A.L. Kharitonov(2)

 

(1) Schmidt Institute of Physics of the Earth, Russian Academy of Sciences, Moscow, Russia

(2) Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation,
Russian Academy of Sciences, Moscow, Russia

 

Abstract. Gas- and oil-bearing provinces in the Western Siberia are aligned nearly longitudinally with a spatial period of ~300 km. Their total latitudinal range exceeds 10(3) km. It is assumed that non-organic hydrocarbons are transported to the Earth’ surface from the upper mantle by mantle convection formed on the background of total mantle material motion in result of subduction of the Russian platform under the Western Siberia in the Paleozoic. That convection coincides in scale with the spatial period of the gas- and oil-bearing provinces. Based on this assumption and with the use of other geophysical data, the subduction velocity of the Russian platform under the Urals can be constrained. 

Keywords: non-organic hydrocarbons transport, mantle wedge convection, subduction angle and velocity.

 

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