Garnets of crustal parageneses in alluvial deposits of the eastern Siberian Platform: genesis and search significance |
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| Authors: | EI Nikolenko VP Afanas&#x;ev NP Pokhilenko |
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| Institution: | aInstitute of Geology and Mineralogy, Siberian Branch of the RAS, 3 prosp. Akad. Koptyuga, Novosibirsk, 630090, Russia |
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| Abstract: | We present results of study of the specific composition and parageneses of pyrope-almandine garnets from alluvial deposits of the Muna-Markha interfluve drainage in the Yakutian diamondiferous province. The data are correlated with the specific features of garnets (tentatively crustal) from Yakutian and Guinean kimberlites and their crustal xenoliths and from metamorphic rocks of the Anabar Shield. The conclusion is drawn that most of orange pyrope-almandine garnets from the alluvial deposits were generated from kimberlites with varying contents of disintegrated crustal material. This gives grounds to include the studied garnets into a complex of indicator minerals of kimberlites and use them in search for diamonds in the Yakutian diamondiferous province. |
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| Keywords: | Pyrope-almandine garnets lower crust kimberlite shield Siberian Platform |
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