Abstract
Experiments at 6.0–7.1 GPa and 1500–1700°C were carried out to explore the boundary conditions of diamond nucleation and growth in pyrrhotite-carbon melt-solutions. Pyrrhotite is one of the main sulfide minerals of the pyrrhotite-pentlandite-chalcopyrite assemblage of mantle rocks and primary inclusions in diamond. Solutions of carbon in sulfide melts oversaturated with respect to diamond at the expense of the dissolution of starting graphite (thermodynamically unstable phase) are formed owing to the difference between the solubilities of graphite and diamond, which increases under the influence of temperature gradients in experimental samples. We determined the fields of carbon solutions in pyrrhotite melt showing labile and metastable oversaturation with respect to diamond, which correspond to the spontaneous nucleation of the diamond phase and diamond growth on seeds, respectively. The linear growth rate of diamond in sulfide-carbon melts is rather high (on average, 10 μ/min during the first 1–2 min from the onset of spontaneous crystallization). The nucleation density is estimated as 180 grains per cubic centimeter. Diamonds crystallized from sulfide melts show octahedral and spinel twin shapes. Diamond polycrystals were synthesized for the first time from a sulfide medium as intergrowths of skeletal (edge) or “cryptocrystalline” microdiamonds, from 1 to 100 μm in size, their spinel twins and, occasionally, polysynthetic (star-shaped) twins. During diamond growth from sulfidecarbon melts on smooth faces of cuboctahedral diamond seeds synthesized in metal systems, smooth-faced layer-by-layer step-like growth was observed on their octahedral (111) faces, whereas growth on the (100) cubic faces produced rough-surfaced layers of intergrown micropyramids, whose axes were oriented normal to the (100) face. The obtained experimental results were applied to the problem of diamond genesis under the conditions of the Earth’s mantle in the framework of the model of carbonate-silicate parental melts with blebs of immiscible sulfide melts.
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References
W. E. Sharp, “Pyrrhotite: A Common Inclusion in South African Diamonds,” Nature 211, 402–403 (1966).
N. V. Sobolev and V. A. Vakhrushev, “Sulfides in Pyrope Peridotites from Yakutian Kimberlites,” Zap. Vseross. Mineral. O-va 96, 450–453 (1967).
G. A. Desborough and G. K. Czamanske, “Sulfides in Eclogite Nodules from a Kimberlite Pipe, South Africa: with Comments on Violarite Stoichiometry,” Am. Mineral. 58, 195–202 (1977).
N. V. Sobolev, Deep-Seated Inclusions in Kimberlites and Problem of Upper Mantle Composition (Nauka, Novosibirsk, 1974) [in Russian].
G. P. Bulanova, A. V. Varshavskii, N. V. Leskova, and L. V. Nikishova, in Physical Properties and Mineralogy of Natural Diamonds (Izd. YaF SO AN SSSR, Yakutsk, 1979), pp. 29–45 [in Russian].
J. W. Harris and J. J. Garney, “Properties of Diamond,” in Inclusions in Diamond, Ed. by J. E. Field (Academic Press, London, 1979), pp. 556–591.
E. S. Efimova, N. V. Sobolev, and L. N. Pospelova, “Sulfide Inclusions in Diamonds and Their Paragenesis,” Zap. Vseross. Mineral. O-va 112(11), 300–310 (1983).
G. P. Bulanova, Z. V. Spetsius, and N. V. Leskova, Sulfides in Diamonds and Xenoliths from Kimberlite Pipes of Yakutia (Nauka, Novosibirsk, 1993) [in Russian].
M. Schrauder and O. Navon, “Hydrous and Carbonatitic Mantle Fluids in Fibrous Diamonds from Jwaneng, Botswana,” Geochim. Cosmochim. Acta 58, 761–771 (1994).
G. P. Bulanova, W. L. Griffin, and C. G. Ryan, “Nucleation Environment of Diamonds from Yakutian Kimberlites,” Mineral. Mag. 62, 409–419 (1998).
N. V. Sobolev, F. V. Kaminsky, W. L. Griffin, et al., “Mineral Inclusions in Diamonds from the Sputnik Kimberlite Pipe, Yakutia,” Lithos 39, 135–157 (1997).
E. S. Izraeli, J. H. Harris, and O. Navon, “Brine Inclusions in Diamonds: A New Upper Mantle Fluid,” Earth Planet. Sci. Lett. 187, 323–332 (2001).
Z. V. Spetsius, “Two Generations of Diamonds in the Eclogite Xenoliths,” in Proceedings of 7th International Kimberlite Conference, Cape Town, 1998, South Africa (Cape Town, 1998), pp. 823–828.
P. Deines and J. W. Harris, “Sulfide Inclusion Chemistry and Carbon Isotopes of African Diamonds,” Geochim. Cosmochim. Acta 59, 3173–3188 (1995).
O. Klein-BenDavid, A. M. Logvinova, E. S. Izraeli, et al., “Sulfide Melt Inclusions in Yubileynaya (Yakutia) Diamonds,” in Proceedings of 8th International Kimberlite Conference, Victoria, Canada, 2003, (Victoria, 2003), FLA_0119.
A. M. Logvinova, O. Klein-BenDavid, E. S. Izraeli, et al., “Microinclusions in Fibrous Diamonds from Yubileinaya (Yakutia) Diamonds,” in Proceedings of 8th International Kimberlite Conference, Victoria, Canada, 2003, (Victoria, 2003), FLA_0125
S. H. Richardson, S. B. Shirey, and J. W. Harris, “Episodic Diamond Genesis at Jwaneng, Botswana, and Implications for Kaapvaal Craton Evolution,” Lithos 77, 143–154 (2004).
P. C. Marx, “Pyrrhotine and the Origin of Terrestrial Diamonds,” Mineral. Mag. 38, 636–638 (1972).
S. E. Haggerty, “Diamond Genesis in a Multiply Constrained Model,” Natuire 320, 34–38 (1986).
A. I. Chepurov, “Role of Sulfide Melts in the Formation of Natural Diamonds,” Geol. Geofiz., No. 8, 119–124 (1988).
G. P. Bulanova, “The Formation of Diamond,” J. Geochem. Explor. 53, 1–23 (1995).
A. I. Chepurov, I. I. Fedorov, and V. M. Sonin, Experimental Modeling of Diamond Formation (SO RAN NITs OIGGM, Novosibirsk, 1997) [in Russian].
S. V. Titkov, L. V. Bershov, E. Scandale, et al., “Nickel Structural Impurities in Natural Diamonds,” in Proceedings of 7th International Kimberlite Conference, Cape Town, 1998, South Africa (Cape Town, 1998), pp. 867–871.
Yu. A. Litvin, V. G. Butvina, A. V. Bobrov, and V. A. Zharikov, “The First Synthesis of Diamond in Sulfide-Carbon Systems: The Role of Sulfides in Diamond Genesis,” Dokl. Akad. Nauk 382, 106–109 (2002) [Dokl. Earth Sci. 382, 40–43 (2002)].
Yu. A. Litvin and V. G. Butvina, “Diamond-Forming Media in the System Eclogite-Carbonatite-Sulfide-Carbon: Experiments at 6.0–8.5 GPa,” Petrologiya 12, 425–437 (2004) [Petrology 12, 377–387 (2004)].
Yu. N. Pal’yanov, Yu. M. Borzdov, I. Yu. Ovchinnikov, and N. V. Sobolev, “Experimental Study of the Interaction between Pentlandite Melt and Carbon at Mantle PT Parameters: Condition of Diamond and Graphite Crystallization,” Dokl. Akad. Nauk 392, 388–391 (2003) [Dokl. Earth Sci. 392, 1026–1029 (2003)].
Yu. A. Litvin, A. V. Shushkanova, and V. A. Zharikov, “Immiscibility of Sulfide-Silicate Melts in the Mantle: Role in the Syngenesis of Diamond and Inclusions (Based on Experiments at 7.0 GPa),” Dokl. Akad. Nauk 402, 719–723 (2005) [Dokl. Earth Sci. 403, 715–718 (2005)].
A. V. Shushkanova and Yu. A. Litvin, “Phase Relations during Melting of Diamond-Bearing Carbonate-Silicate-Sulfide Systems,” Geol. Geofiz. 46, 1331–1340 (2005).
A. V. Shushkanova and Yu. A. Litvin, “Formation of Diamond Polycrystals in Pyrrhotite-Carbonic Melt: Experiments at 6.7 GPa,” Dokl. Akad. Nauk 409, 394–398 (2006) [Dokl. Earth Sci. 409A, 916–920 (2006)]
G. Kurat and G. Dobosi, “Garnet and Diopside-Bearing Diamondites (Framesites),” Mineral. Petrol. 69, 143–159 (2000).
T. Taniguchi, D. Dobson, A. P. Jones, et al., “Synthesis of Cubic Diamonds in the Graphite-Magnesium Carbonate and Graphite-K2Mg(CO3)2 Systems at High pressures of 9–10 GPa Region,” J. Mater. Res. 11, 2622–2632 (1996).
Yu. A. Litvin, L. T. Chudinovskikh, and V. A. Zharikov, “Experimental Crystallization of Diamond and Graphite from Alkali-Carbonate Melts at 7–11 GPa,” Dokl. Akad. Nauk 355, 669–672 (1997) [Dokl. Earth Sci. 355, 908–911 (1997)].
Yu. N. Pal’yanov, A. G. Sokol, Yu. M. Borzdov, et al., “Diamond Crystallization in the Systems CaCO3-C, MgCO3-C, and CaMg(CO3)2-C,” Dokl. Akad. Nauk 363, 1156–1159 (1998) [Dokl. Earth Sci. 363, 1156–1159 (1998)].
Yu. A. Litvin and V. A. Zharikov, “Primary Fluid-Carbonatite Inclusions in Diamond: Experimental Modeling in the System K2O-Na2O-CaO-MgO-FeO-CO2 as a Diamond Formation Medium at 7–9 GPa,” Dokl. Akad. Nauk 367, 397–401 (1999) [Dokl. Earth Sci. 367, 801–805 (1999)].
Yu. M. Borzdov, A. G. Sokol, Yu. N. Pal’yanov, et al., “The Study of Diamond Crystallization from Alkaline Silicate, Carbonate, and Carbonate-Silicate Melts,” Dokl. Akad. Nauk 366, 530–533 (1999) [Dokl. Earth Sci. 366, 578–581 (1999)].
Yu. A. Litvin and V. A. Zharikov, “Experimental Modeling of Diamond Genesis: Diamond Crystallization in Multicomponent Carbonate-Silicate Melts at 5–7 GPa and 1200–1570°C,” Dokl. Akad. Nauk 372, 808–811 (2000) [Dokl. Earth Sci. 373, 867–870 (2000)].
A. F. Shatskii, Yu. M. Borzdov, A. G. Sokol, et al., “Phase Formation and Crystallization of Diamond in the Ultra-Potassic Carbon-Bearing Carbonate-Silicate Systems,” Geol. Geofiz. 43, 936–946 (2002).
Yu. A. Litvin, “Alkaline-Chloride Components in Processes of Diamond Growth in the Mantle and High-Pressure Experimental Conditions,” Dokl. Akad. Nauk 389, 382–386 (2003) [Dokl. Earth Sci. 389, 388–391 (2003)].
M. Akaishi and S. Yamaoka, “Crystallization of Diamond from C-O-H Fluids under High-Pressure and High-Temperature Conditions,” J. Cryst. Growth 213, 999–1003 (2000).
Yu. N. Pal’yanov and A. G. Sokol, “Diamond and Graphite Crystallization in COH Fluid at PT Parameters of the Natural Diamond Formation,” Dokl. Akad. Nauk 375, 384–388 (2000) [Dokl. Earth Sci. 375, 1395–1398 (2000)].
M. Akaishi, M. D. Shaji Kumar, H. Kanda, and S. Yamaoka, “Formation Process of Diamond from Supercritical H2O-CO2 Fluid Under High Pressure and High Temperature Conditions,” Diamond Relat. Mater. 9, 1945–1950 (2000).
A. G. Sokol, Yu. N. Pal’yanov, G. A. Pal’yanova, et al., “Diamond and Graphite Crystallization from C-O-H Fluids,” Diamond Relat. Mater. 11, 118–124 (2002).
A. G. Sokol, Yu. N. Pal’yanov, G. A. Pal’yanova, and A. A. Tomilenko, “Diamond Crystallization in Fluid and Carbonate-Fluid Systems under Mantle P-T Conditions: 1. Fluid Composition,” Geokhimiya, No. 9, 1–10 (2004) [Geochem. Int. 42, 830–838 (2004)].
A. G. Sokol and Yu. N. Pal’yanov, “Diamond Crystallization in Fluid and Carbonate-Fluid Systems under Mantle P-T Conditions: 2. An Analytical Review of Experimental Data,” Geokhimiya, No. 11, 1157–1172 (2004) [Geochem. Int. 42, 1018–1032 (2004)].
Yu. A. Litvin, “High-Pressure Mineralogy of Diamond Genesis,” Ed. by E. Ohtani, Geol. Soc. Am. Monograph (2006).
C. S. Kennedy and G. C. Kennedy, “The Equilibrium Boundary between Graphite and Diamond,” J. Geophys. Res. 81, 2467–2470 (1976).
Yu. L. Orlov, Diamond Mineralogy (Akad. Nauk SSSR, Moscow, 1963) [in Russian].
A. V. Spivak and Yu. A. Litvin, “Diamond Syntheses in Multicomponent Carbonate-Carbon Melts of Natural Chemistry: Elementary Processes and Properties,” Diamond Relat. Mater, No. 13, 482–487 (2003).
G. I. Bocharova, V. K. Garanin, G. P. Kudryavtseva, and M. S. Perminova, “Sulfide Mineralization in Kimberlties of Yakutia,” in Proceedings of 13th IMA Conference, Sofia, 1989, p. 107 [in Russian].
V. V. Sharygin, A. V. Golovnin, N. P. Pokhilenko, and N. V. Sobolev, “Djerfisherite in Unaltered Kimberlites of the Udachnaya-East Pipe, Yakutia,” Dokl. Akad. Nauk 390, 242–246 (2003) [Dokl. Earth Sci. 390, 554–557 (2003)].
O. Navon, “Diamond Formation in the Earth’s Mantle,” in Proceedings of 7th International Kimberlite Conferences, Cape Town, South Africa, 1999 (Red Roof Design, Cape Town, 1999), vol. 2, pp. 584–604.
Yu. A. Litvin, G. Kurat, and G. Doboshi, “Experimental Study of the Diamond Formation in Carbonate-Silicate Melts: Model Approximation to Natural Processes,” Geol. Geofiz. 46, 1304–1317 (2005).
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Original Russian Text © A.V. Shushkanova, Yu.A. Litvin, 2008, published in Geokhimiya, 2008, No. 1, pp. 42–53.
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Shushkanova, A.V., Litvin, Y.A. Diamond formation in sulfide pyrrhotite-carbon melts: Experiments at 6.0–7.1 GPa and application to natural conditions. Geochem. Int. 46, 37–47 (2008). https://doi.org/10.1134/S0016702908010035
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DOI: https://doi.org/10.1134/S0016702908010035