Petrochemical evaluation of the diamond potentials of Yakutian kimberlite fields
作者： V. B. Vasilenko , A. V. Tolstov , L. G. Kuznetsova , V. A. Minin
DOI: 10.1134/S0016702910040038
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摘要: The diamond potentials of nine kimberlite bodies occurring in the Mirnyi, Nakyn, AlakitMarkha, and Daldyn fields were studied by examination 2026 10-m core intervals. Most typical rock samples about 1 kg taken from each interval for X-ray fluorescence analysis silicates. A total 6715 analyzed. Pairwise correlation coefficients between mean compositions kimberlites their contents calculated. Correlations with presence (99%) found only TiO2, Al2O3, K2O. negative TiO2 positive K2O can serve as criteria presence. These dependences are good agreement petrochemical population model. According to this model, decrease range 3.0–0.01% increase content 0.85% related larger depths parental melting zones. Contents exceeding determined garnet pyroxenites, associated processes accompanying oceanic crust subduction, magma formation Formation melts at determines higher bodies. Our results confirm hypothesis that selective lithospheric peridotites saturated water carbon dioxide.
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