Abstract
The carbon isotope composition of microdiamonds found in products of the Tolbachik Volcano eruption, Kamchatka (porous lavas and ash), was studied. The isotope composition of microdiamonds (with an average value of δ13C =–25.05‰) is close to that of microsized carbon particles in lavas (from–28.9 to–25.3‰). The general peculiarities of the diamond-forming environment include (1) no evidence for high pressure in the medium; (2) a reduced environment; and (3) mineralogical evidence for the presence of a fluid. The geochemical data characterizing the type of diamonds studied allow us to suggest that they were formed in accordance with the mechanism of diamond synthesis during cavitation in a rapidly migrating fluid, which was suggested by E.M. Galimov.
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E. I. Gordeev, G. A. Karpov, L. P. Anikin, S. V. Krivovichev, S. K. Filatov, A. V. Antonov, and A. A. Ovsyannikov, Dokl. Earth Sci. 454 (2), 47–49 (2014).
V. I. Silaev, G. A. Karpov, V. I. Rakin, L. P. Anikin, E. A. Vasil’ev, V. N. Filippov, and V. A. Petrovskii, Vestn. Perm. Univ. Geol., No. 26, 7–22 (2015).
E. M. Galimov, Geochim. Cosmochim. Acta 55 (6), 1697–1708 (1991).
R. Wirth and A. Rocholl, Earth Planet. Sci. Lett. 211, 357–369 (2003).
F. V. Kaminskii, Diamond Content of Not-Kimberlite Magmatic Rocks (Nedra, Moscow, 1984) [in Russian].
E. M. Galimov, V. S. Sevastyanov, G. A. Karpov, A. I. Kamaleeva, O. I. Kuznetsova, I. V. Konopleva, and L. N. Vlasova, Geochem. Int. 53 (12), 1019–1027 (2015).
G. A. Karpov, L. P. Anikin, G. B. Flerov, V. M. Chubarov, and R. L. Dunin-Barkovskii, in Proc. Conf. on Volcanism and Associated Processes (Inst. Volcan. Seismol. Far East Russ. Acad. Sci., Petropavlovsk-Kamchatskii, 2014), pp. 1–6.
E. M. Galimov, Nature 243, 389–391 (1973).
F. C. Frank and A. R. Lang, Nature 246, 143–144 (1973).
E. M. Galimov, A. M. Kudin, V. N. Syrobogatskii, V. G. Plotnichenko, O. L. Bondarev, B. G. Zarubin, V. V. Strazdovskii, A. S. Aronin, A. V. Fisenko, I. V. Bykov, and A. Yu. Barinov, Dokl. Akad. Nauk 395 (2), 187–191 (2004).
J. B. Dawsen, Kimberlites and Their Xenoliths (Springer-Verlag, Berlin-Heidelberg, New York, 1980).
I. Perchuk, I. D. Ryabchikov, and I. Kushiro, in Proc. 1st Int. Symp. on Hydrothermal Reactions, Ed. by Shigeyuki Somiya and Ftikyu Kai (Tokyo, 1983), p. 258.
A. V. Ukhanov and T. V. Malysheva, Geokhimiya, No. 10, 1467 (1973).
E. M. Galimov, Geochemistry 4, 456–471 (1985).
D. V. Fedoseev, E. M. Galimov, V. P. Varnin, V. S. Prokhorov, and B. V. Deryagin, Pis’ma Zh. Eksp. Teor. Fiz. 14 (2), 80–82 (1971).
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Original Russian Text © E.M. Galimov, V.S. Sevastyanov, G.A. Karpov, S.N. Shilobreeva, A.P. Maksimov, 2016, published in Doklady Akademii Nauk, 2016, Vol. 469, No. 1, pp. 61–64.
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Galimov, E.M., Sevastyanov, V.S., Karpov, G.A. et al. Microcrystalline diamonds in the oceanic lithosphere and their nature. Dokl. Earth Sc. 469, 670–673 (2016). https://doi.org/10.1134/S1028334X16070011
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DOI: https://doi.org/10.1134/S1028334X16070011