L. I. Gontovaya1, V. V. Gordienko2, S. V. Popruzhenko3, I. V. Nizkous4

1 Institute of Volcanology and Seismology RAS FEB, Petropavlovsk-Kamchatsky, 683006, Russia; е-mail: [email protected]
2 Institute of Geophysics, Ukraine National Academy of Sciences, Kiev, 03680; е-mail: [email protected]
3 Territorial Agency for Subsoil Use of Kamchatka Region and Koryak Autonomous Okrug (Kamchatnedra), Ministry of Natural Resources of Russian Federation, Petropavlovsk-Kamchatsky, 683016, Russia, е-mail: [email protected]
4 Schlumberger Logelco Inc., Moscow; е-mail: [email protected]

Data of geologic and geophysical research done in Kamchatka were compared to the velocity model for the upper mantel. The comparison revealed a consistent spatial structure in the lithosphere of the region. The modeling showed asthenolith under the Central-Kamchatka rift zone. Its thickness and boundaries were detected in the upper mantel of Eastern Kamchatka. Аsthenolyth inclusions at 70-120 km depth beneath modern volcanic belts revealed a relationship between these inclusions, continental lithosphere and seismic focal zone velocity structures. Structure of the upper mantle at variety of depths corresponds to fault tectonics. Revealed characteristics of the deep structure of Kamchatka were studied using advection-polymorphous hypothesis. Results revealed that deep-structure processes agree with the suggested model for the mantle in the studied interval of depths.