| Reference Type | Journal (article/letter/editorial) |
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| Title | Nucleation environment of diamonds from Yakutian kimberlites |
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| Journal | Mineralogical Magazine | ISSN | 0026-461X |
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| Authors | Bulanova, G. P. | Author |
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| Griffin, W. L. | Author |
| Ryan, C. G. | Author |
| Year | 1998 (June) | Volume | 62 |
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| Issue | 3 |
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| Publisher | Mineralogical Society |
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| Download URL | https://rruff.info/doclib/MinMag/Volume_62/62-3-409.pdf+ |
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| DOI | doi:10.1180/002646198547675Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 286 | Long-form Identifier | mindat:1:5:286:2 |
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| GUID | 0 |
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| Full Reference | Bulanova, G. P., Griffin, W. L., Ryan, C. G. (1998) Nucleation environment of diamonds from Yakutian kimberlites. Mineralogical Magazine, 62 (3) 409-419 doi:10.1180/002646198547675 |
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| Plain Text | Bulanova, G. P., Griffin, W. L., Ryan, C. G. (1998) Nucleation environment of diamonds from Yakutian kimberlites. Mineralogical Magazine, 62 (3) 409-419 doi:10.1180/002646198547675 |
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| Abstract/Notes | AbstractThe micro-inclusions located in the genetic centre of Yakutian diamond monocrystals have been studied using optical (anomalous birefringence, photoluminescence, cathodoluminescence) and microanalytical (electron-microprobe, proton-microprobe, scanning electron microscope) methods. Most diamonds nucleated heterogeneously on mineral seeds, that lowered the energy barrier to nucleation. Nucleation of peridotitic diamonds occurred on a matrix of graphite+iron+wüstite, in an environment dominated by forsteritic olivine and Fe-Ni sulfide. Nucleation of eclogitic diamonds occurred on a matrix of sulfide ± iron in an environment dominated by Fe-sulfide and omphacite (±-K-Na-Al-Si-melt). The mineral assemblages recorded in the central inclusions of Yakutian diamonds indicate that they grew in a reduced environment, with oxygen fugacity controlled by the iron-wüstite equilibrium. Nucleation of diamond occurred in the presence of a fluid, possibly a volatile-rich silicate melt, highly enriched in LIL (K, Ba, Rb, Sr) and HFSE (Nb, Ti, Zr) elements. This fluid also carried immiscible Fe-Ni-sulfide melts, and possibly a carbonatitic component; the introduction of this fluid into a reduced refractory environment may have been accompanied by a thermal pulse, and may have created the conditions necessary for the nucleation and growth of diamond. |
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