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The Deep Structure of the Pauzhetka Hydrothermal System Area, Southern Kamchatka

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Abstract

Multidisciplinary geophysical surveys have been carried out in the Pauzhetka hydrothermal system area and around in order to identify 10–15-km deep geological structures that exercise thermal control of the system. The results of vertical electrical and electromagnetic sounding, magnetometric and gravity surveys have been integrated, and geological–geophysical data have been generalized, to develop a model of layered block structure for the Pauzhetka hydrothermal system area. We provide an explanation of fragmentation (permeability) in upper crustal horizons in the structure of the present-day hydrothermal system and the geothermal field. A horizon of less dense rocks has been identified at depths of 3–4 to 8–9 km; this horizon can be the source of thermal supply for known and hidden temperature anomalies in the Pauzhetka–Kambalnyi–Koshelev geothermal area in southern Kamchatka.

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Notes

  1. Zaitsev, I.M., Report on Multidisciplinary Geophysical Surveys in the Pauzhetka geothermal field in 1969, Territorial Fund of Geological Information for the Far East Federal District, Petropavlovsk-Kamchatsky, 1970. 116 p.

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ACKNOWLEDGMENTS

We express our deep gratitude to all colleagues of the Southern Kamchatka–Kuril Expedition affiliated with the Institute of Volcanology and Seismology, Far East Branch, Russian Academy of Sciences for comprehensive help in our field work. We are deeply indebted to Dr. Sci. (Phys.–Math.) P.P. Firstov and to Cand. Sci. (Geol.–Mineral.) A.G. Nurmukhamedov for valuable remarks and suggestions for improving this paper.

Funding

This work was supported by the Russian Foundation for Basic Research, project nos. 18-35-00138 and 19-05-00102 and by the Far East Division of the Russian Academy of Sciences, project no. 18-2-003.

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Correspondence to S. O. Feofilaktov or S. N. Rychagov.

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Translated by A. Petrosyan

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Feofilaktov, S.O., Rychagov, S.N., Loginov, V.A. et al. The Deep Structure of the Pauzhetka Hydrothermal System Area, Southern Kamchatka. J. Volcanolog. Seismol. 15, 35–50 (2021). https://doi.org/10.1134/S0742046321010103

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