... of rock-forming oxides and REE. The supply of REE during the hydrothermal metasomatism enriched the kimberlites with TiO 2 , P 2 O 5 , and CaO. During the removal of REE, most of the rock-forming oxides were partially lost. The maximum REE supply was 67% in the Udachnaya-Vostochnaya pipe and 59...

...Fig. 1. Proportions of the bulk CO 2 and H 2 O contents in olivines (Ol x ) and garnets (Ga x ) from xenoliths of mantle ultrabasic rocks and eclogites (Udachnaya-Vostochnaya, Mir, Obnajzhennaya (Yakutia), Roberts Victor (South Africa) diamond pipes). Ol k —magmatic olivines from kimberlites...

...V.N. Sharapov; M.P. Mazurov; A.A. Tomilenko; V.A. Faleev Abstract We report results of experiments in which samples of ultramafic xenoliths from the Udachnaya-Vostochnaya kimberlite pipe (Siberian craton, Yakutia) were heated, in a flow reactor, by flows of reduced gas at temperatures between 800...

... inclusions in garnet megacrysts. In our opinion, the inclusions result from interaction of megacrysts with kimberlite melt-fluid. The garnet megacrysts were collected from the pipes: Mir (Malo-Botuobinskoe field); Udachnaya-Vostochnaya, Udachnaya-Zapadnaya, Zarnitsa, Dalnaya (Daldyn field); Sytykan...

... Composition of the Initial Sulfide Melt of Inclusions in Olivines from the Udachnaya-Vostochnaya Pipe Nos. Sp. Element contents, % Me/S Ni/Fe S Fe Ni Co Cu Total 1 UV-78-1 39.2 40.0 15.2 0.37 5.28 100.05 0.870 0.360 2 UV-78-2 37.9 39.4 17.5 0.36 4.96 100.12 0.920...

... . Mineralogical Magazine , 78 , 583 – 590 . Marshintsev , V.K. Migalkin , K.N. Nikolaev , N.S. , and Barashkov , I.P. 1976 Unchanged kimberlite of Udachnaya-Vostochnaya pipe . Doklady Akademii Nauk SSSR , 231 , 961 – 964 . Mascal , M. 1997 A statistical analysis...

... 0.69 0.35 s 4.10 0.51 0.80 1.63 3.52 3.80 0.63 0.52 0.17 Udachnaya-Zapadnaya pipe of the Daldyn-Alakit region 898 x 25.18 0.86 2.29 6.53 25.27 15.49 0.17 0.64 0.30 s 4.38 0.28 0.57 2.12 5.80 6.39 6.30 0.42 0.39 Udachnaya-Vostochnaya pipe of the Daldyn...

... . Golovin , A.V. , Sharygin , V.V. , Pokhilenko , N.P. , 2007 . Melt inclusions in olivine phenocrysts from unaltered kimberlites from the Udachnaya-Vostochnaya pipe, Yakutia: some aspects of evolution of kimberlitic magmas at the late stages of crystallization . Petrologiya 15 ( 2 ), 178...

... ]. The analyzed samples of basaltoid kimberlites are represented by compact monticellite-bearing kimberlites of massive structure and porphyritic texture, which fill some pipes (Zimnyaya, an. 24), by independent intrusion phases inside intricately constructed pipes (Dal’nyaya, an. 25; Udachnaya-Vostochnaya...

.... It is necessary to carefully approach identification of similar pyrope and diamond relationships in diamondiferous peridotites taking into account possible identification of diamond inclusions in olivine and pyrope, especially in samples from an unaltered kimberlite of the Udachnaya-Vostochnaya pipe...

..., and UZ 76-910 — intergrowth with ilmenite) and one megacryst from the Udachnaya Vostochnaya (Eastern) pipe (UV 91-81). All megacrysts are smooth rounded or ellipsoid nodules 1 to 3.5 cm in size. They show coarse cleavage obliquely cut by thin fracturing. The megacrysts have small caverns filled...

... magma chambers. However, localization of kimberlites on the periphery of the area of the Devonian and Permo-Triassic trap magmatism and the composition of the olivine phenocrysts from the kimberlites of the Udachnaya-Vostochnaya (Devonian) and Malokuonapskaya (Triassic) pipes suggest their genetic link...

... field), Mir (Mirny field), and Udachnaya-Vostochnaya and Udachnaya-Zapadnaya (Daldyn field) pipes showed that secondary processes break oxide correlations typical of unaltered kimberlites and give rise to new correlations ( Fig. 5 , b ). Fig. 5. Correlations between rock-forming oxides (wt...

... . Grishina , S.N. , Maksimovitch , Ya.E. , Goryainov , S.V. , Karmanov , N.S. , Smirnov , S.Z. , 2018 . Chloride-containing segregations in the Udachnaya–Vostochnaya kimberlite pipe, in: The Problems of Magmatic and Metamorphic Petrology, Geodynamics and Genesis of Diamonds : Abstracts...

... in and adjacent to the pipe, as well as the blocks of host-rock basalt, sandstone and mudstone in the pipe. Re-drawn from Field et al. (2008) , after Clement (1982) and Ekkerd et al. (2003) . Figure 10. Udachnaya kimberlite twin pipe mine and its host rock geology. Plan and section views. Note...