Инд. авторы:	Shchukina E.V., Golovin N.N., Mal'kovets V.G., Pokhilenko N.P.
Заглавие:	Mineralogy and equilibrium P-T estimates for peridotite assemblages from the V. Grib Kimberlite Pipe (Arkhangelsk Kimberlite Province)
Библ. ссылка:	Shchukina E.V., Golovin N.N., Mal'kovets V.G., Pokhilenko N.P. Mineralogy and equilibrium P-T estimates for peridotite assemblages from the V. Grib Kimberlite Pipe (Arkhangelsk Kimberlite Province) // Doklady Earth Sciences. - 2012. - Vol.444. - Iss. 2. - P.776-781. - ISSN 1028-334X. - EISSN 1531-8354.
Внешние системы:	DOI: 10.1134/S1028334X12060268; SCOPUS: 2-s2.0-84865644229;
Реферат:	eng: This study presents mineralogical and thermobarometric data for equilibrium peridotite assemblages from the V. Grib kimberlite pipe of the Arkhangelsk diamond province. We provided the first constraints on the composition, structure, thermal state, and lower boundary of the lithospheric mantle beneath the V. Grib kimberlite pipe. It was found that phlogopite-free and phlogopite-bearing peridotite xenoliths can be distinguished by their mineral chemistry. The occurrence of phlogopite in peridotites may represent evidence for modal metasomatism responsible for variation in the mineral composition of phlogopite-pyrope and pyrope peridotites. On the basis of P-T estimates, we conclude that modal metasomatism may have affected the entire thickness of the lithospheric mantle beneath the V. Grib kimberlite pipe. Comparison of our results with the available data from the literature shows strong vertical and lateral mantle heterogeneity beneath kimberlite pipes of the Lomonosov deposit and the V. Grib pipe. © Pleiades Publishing, Ltd., 2012.
Ключевые слова:	Kimberlite pipes; Lithospheric mantle; Russian Federation; Arkhangelsk [Russian Federation]; peridotite; P-T conditions; mineralogy; metasomatism; mantle structure; lithospheric structure; kimberlite; geobarometry; chemical composition; Pipe linings; Petrology; Minerals; Mineralogy; Mica; Crystallography; Thermal state; Peridotite xenoliths; Mineral composition; Mineral chemistry; Mantle heterogeneity; Arkhangelsk; Lower boundary;
Издано:	2012
Физ. характеристика:	с.776-781