Kimberlites and related rocks of the Arkhangel’sk diamondiferous province and adjacent areas: A comparative petrogeochemical analysis |
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Authors: | A V Lapin E M Verichev |
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Institution: | (1) Institute of Mineralogy, Geochemistry, and Crystal Chemistry of Rare Elements, ul. Veresaeva 15, Moscow, 121327, Russia;(2) ZAO Arkhangel’skgeolrazvedka, Novodvinsk, Arkhangel’sk oblast, 163000, Russia |
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Abstract: | The formational and metallogenic affiliation of the alkaline ultramafic rocks of the Arkhangel’sk diamondiferous province
and the adjacent areas of the northern East European platform were analyzed using recent concepts on the structure of the
formational and metallogenic family of kimberlites and related rocks, petrogeochemical criteria, and discriminant diagrams
based on reference associations. It was shown that the alkaline ultramafic magmatism of the Arkhangel’sk province belongs
to various formations, which is typical of the provinces of ancient craton margins. In addition to diamondiferous kimberlites,
the area hosts abundant low-grade diamondiferous kimpicrites and alpicrites, which are typically associated with rare-metal
carbonatites. Significant petrogeochemical differences were detected between the diamondiferous kimberlites of the Arkhangel’sk
province and the kimberlites of the classic Central Yakutian diamondiferous province. This allowed us to consider the rocks
of the Arkhangel’sk province as a specific geochemical type of diamondiferous kimberlites.
Original Russian Text ? A.V. Lapin, E.M. Verichev, 2006, published in Geokhimiya, 2006, No. 8, pp. 834–854. |
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