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Gorokhova N.V., Melnik O.E., Plechov P.Yu., Shcherbakov V.D. Numerical simulation of plagioclase rim growth during magma ascent at Bezymianny Volcano, Kamchatka // Journal of Volcanology and Geothermal Research. 2013. V. 263. P. 172 - 181. doi: 10.1016/j.jvolgeores.2013.03.020.    Аннотация
Slow CaAl-NaSi interdiffusion in plagioclase crystals preserves chemical zoning of plagioclase in detail, which, along with strong dependence of anorthite content in plagioclase on melt composition, pressure, and temperature, make this mineral an important source of information on magma processes. A numerical model of zoned crystal growth is developed in the paper. The model is based on equations of multicomponent diffusion with diagonal cross-component diffusion terms and accounts for mass conservation on the melt–crystal interface and growth rate controlled by undercooling. The model is applied to the data of plagioclase rim zoning from several recent Bezymianny Volcano (Kamchatka) eruptions. We show that an equilibrium growth model cannot explain crystallization of naturally observed plagioclase during magma ascent. The developed non-equilibrium model reproduced natural plagioclase zoning and allowed magma ascent rates to be constrained. Matching of natural and simulated zoning suggests ascent from 100 to 50 MPa during 15–20 days. Magma ascent rate from 50 MPa to the surface varies from eruption to eruption: plagioclase zoning from the December 2006 eruption suggests ascent to the surface in less than 1 day, whereas plagioclase zoning from March 2000 and May 2007 eruptions are better explained by magma ascent over periods of more than 30 days). Based on comparison of diffusion coefficients for individual elements a mechanism of atomic diffusion during plagioclase crystallization is proposed.
Gorshkov G.S. Catalogue of the active volcanoes of the world including solfatara fields. Part VII - Kurile Islands / Ed. Signore Francesco Napoli, Italy: the International Volcanological Association. 1958. 100 p.
Gorshkov G.S. Determination of the explosion energy in some volcanoes according to barograms // Bulletin Volcanologique, organe de IAV. 1960. V. 23. V. 2. P. 141-144.
Gorshkov G.S. Directed volcanic blasts // Bulletin Volcanologique. 1963. V. 26. P. 83-88.
Gorshkov G.S. Gigantic Eruption of the Volcano Bezymianny // Bulletin Volcanologique, organe de IAV. 1959. V. 20. V. 2. P. 77-109.
Gorshkov G.S. Intra-oceanic Islands, East Pacific Ridge, Islands arcs: volcanism and upper mantle // Tectonophysics. // Tectonophysics. 1969. № 8. P. 213-221. doi: 10.1016/0040-1951(69)90098-5.
Gorshkov G.S. Kamchatka Valley of Ten Thousand Smokes // Bulletin of the Volcanological Society of Japan. 1959. V. 3. V. 2. № 2. P. 154-156.
Gorshkov G.S. Kurile Islands // Catalog of Active Volcanoes of the World and Solfatara Fields. Rome: IAVCEI, 7. 1958. P. 1-99.
Gorshkov G.S. On some theoretical problems of Volcanology // Bulletin of Volcanology. 1958. V. 19. № 1. P. 103-114. doi: 10.1007/BF02596600.
Gorshkov G.S. On the Relation of Volcanism and the Upper Mantle // Bulletin Volcanologique. 1965. V. 28. P. 159-167.
Gorshkov G.S. On the classification and terminology of Pelee and Katmai type eruptions // Bulletin of Volcanology. 1962. V. 24. P. 155-165.
Gorshkov G.S. On the origin of ignimbrites in relation to the study of recent eruptions // Bulletin of Volcanology. 1963. V. 25. P. 33-37.
Gorshkov G.S. On the petrochemistry of volcanic rocks in connection with the formation of island arcs // Publ. du Bureau Central Sasmol Intern. 1961. V. A. № 22.
Gorshkov G.S. On the relation between seismic and volcanic phenomena and the energy balance of the Bezymianny volcano eruption // Proc. 9th Pacific Sci. Congr. 1963. V. 12.
Gorshkov G.S. Petrochemical features of volcanism in relation to the types of the Earth's crust // The Crust of the Pacific Basin // Geoph. Monograph. AGU. 1962. V. 6. P. 110-115.
Gorshkov G.S. Petrochemistry of volcanic rocks in relation to the formation of island arcs // Annali di Geofisica. 1961. V. 14. № 2.
Gorshkov G.S. Petrochemistry of volcanic rocks in the Kurile Islands arc with some generalizations on volcanism // The Western Pacific: Island Arcs, Marginal Seas, Geochemistry. University of Western Australian Press. 1973. P. 459-467.
Gorshkov G.S. Progress and problems in volcanology // Tectonophysics. 1972. V. 13. № 1-4. P. 123-140.
Gorshkov G.S. Some result of seismometric investigations at the Kamchatka Volcanological Station // Bulletin Volcanologique, organe de IAV. 1960. V. 23. V. 2. P. 121-128.
Gorshkov G.S. Two types of alkaline rocks - two types of upper mantle // Bulletin of Volcanology. 1969. V. 33. № 4. P. 1186-1198.





 

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