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Diamond nucleation and growth in sulfide-carbon melts; an experimental study at 6.0-7.1 GPa

Anastasia V. Shushkanova and Yuriy A. Litvin
Diamond nucleation and growth in sulfide-carbon melts; an experimental study at 6.0-7.1 GPa (in Diamonds, Makoto Arima (editor), Ben Harte (editor) and Nikolay V. Sobolev (editor))
European Journal of Mineralogy (June 2008) 20 (3): 349-355

Abstract

Experimental study of diamond nucleation and growth in pyrrhotite-carbon melts was carried out at 6.0-7.1 GPa. The PT -diagram of diamond crystallization was constructed, and we found that the PT boundary conditions of diamond formation are limited by the diamond-graphite equilibrium line and the PT curve of the pyrrhotite-carbon eutectics. The fields of diamond spontaneous nucleation and mass crystallization as well as of diamond-seeded growth were determined. Diamond nucleation density up to 1.8X10 (super 5) grains in 1 mm (super 3) and growth rate within the range of several mm/min to several mu m/min were estimated. A possibility for formation of both monocrystalline and polycrystalline diamonds in the molten sulfide solvents was also demonstrated. Experimental data are in agreement with the melt-solution model of diamond formation in sulfide solvents of carbon. The experimental and literature data applied to the model of the mantle-derived diamond genesis demonstrate that sulfide melts with dissolved carbon are capable to form a limited mass of diamonds with specific mineralogical and physical properties.


ISSN: 0935-1221
EISSN: 1617-4011
Serial Title: European Journal of Mineralogy
Serial Volume: 20
Serial Issue: 3
Title: Diamond nucleation and growth in sulfide-carbon melts; an experimental study at 6.0-7.1 GPa
Title: Diamonds
Author(s): Shushkanova, Anastasia V.Litvin, Yuriy A.
Author(s): Arima, Makotoeditor
Author(s): Harte, Beneditor
Author(s): Sobolev, Nikolay V.editor
Affiliation: Russian Academy of Sciences, Institute of Experimental Mineralogy, Chernogolovka, Russian Federation
Pages: 349-355
Published: 200806
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Federal Republic of Germany
References: 29
Accession Number: 2008-111809
Categories: Mineralogy of non-silicatesGeophysics of minerals and rocks
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table
Secondary Affiliation: M. V. Lomonosov Moscow State University, RUS, Russian Federation
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, copyright, Schweizerbart'sche Verlagsbuchhandlung. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 200841
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