... was discovered by the authors, is composed of dome-shaped stocks of rare metal peralkaline granite covering 0.85 km and represents the late plutonic phases of the Devonian (380-390 Ma) multiphase Khaldzan-Buregtey peralkaline granite massif. The formation of the massif took place during tectonic extension...

... 2017 The mineral tuhualite (NaFe 3+ Fe 2+ Si 6 O 15 ) has been recorded from only two localities, in peralkaline rhyolites (∼130 ka − present) from the type locality, Mayor Island, New Zealand ( Marshall, 1932 ,  1936 ), and in a 390–392 Ma peralkaline granite of the Khaldzan Buregtey Massif...

... ratios of incompatible trace elements as reflection of source mixing for alkaline granitoids and basites from the Khaldzan Buregtey massif and of the rare-metal deposit there . Petrologija 17 , 249 – 275 . Kynicky, J...

... in Saudi Arabia ( Küster, 2009 ), the Khaldzan-Buregtey granite massif in Mongolia ( Kovalenko et al., 1995 ; Kempe et al., 2015 ), the Amis Complex in Namibia ( Schmitt et al., 2000; 2002 ), and the Tamazeght alkaline complex in Morocco ( Salvi et al., 2000 ). Pyrochlore is also the main Nb-bearing...

... (= Khaldzan Buregtey or Khaldzan Buragtag) (Kovalenko et al. , 1995 ; Kempe et al. , 2015 ) alkaline granite intrusions in Mongolia and the Strange Lake complex in Canada (Birkett et al. , 1992 ; Salvi and Williams-Jones, 2001 ). In nepheline-syenite complexes no significant elpidite deposits are known...

... and flora in sedimentary rocks of some key sections of volcanosedimentary strata ( Gavrilova and Luvsandanzan, 1983 ; Yarmolyuk and Kovalenko, 1991 ). The rocks of alkali granite massifs in the Mongolian Altay and the southern framing of the Tuva basin are their intrusive analogues. The Khaldzan–Buregtei...

... . Variations in the Nd isotopic ratios and canonical ratios of concentrations of incompatible elements as an indication of mixing sources of alkali granitoids and basites in the Khaldzan–Buregtei massif and the Khaldzan–Buregtei rare-metal deposit in Western Mongolia . Petrology 17 ( 3 ), 227 – 252...

... diversity. For example, eight mineral phases, including ones of metasomatic genesis, were recognized in the Haldzan-Buregtey granites ( Kovalenko et al., 1995 ). Several mineral phases were also found in one of the largest alkali-granitoid massifs of Central Asia ( Rikhvanov et al., 2013 ). Of special...

.... , Sal’nikova , E.B. , Kartashov , P.M. , Kovach , V.P. , Kozakov , I.K. , Kozlovskii , A.M. , Kotov , A.B. , Ponomarchuk , V.A. , Listratova , E.N. , Yakovleva , S.Z. , 2004 . The Khaldzan–Buregtei massif of peralkaline rare-metal igneous rocks: structure, geochronology...

... , S.Z. ( 2004 a). The Khaldzan–Buregtei massif of peralkaline rare-metal igneous rocks: structure, geochronology, and geodynamic setting in the Caledonides of Western Mongolia . Petrology 12 ( 5 ), 467 – 494 . Kovalenko , V.I. , Yarmolyuk , V.V. , Kovach , V.P. , Kotov , A.B...

... wt %, Y = 0.22 wt %) are reached in samples of these aegerine-albite aplites ( Schmitt et al., 2000 ). These abundances are similar to those from other rare metal deposits hosted by peralkaline granites (e.g., Strange Lake, Canada; Boily and Williams-Jones, 1994 , or Khaldzan-Buregtey, Western...

... samples, collected from quartz-epidote metasomatites, a syenite pegmatite and a quartzolite from occurrences in Russia (the Keivy massif, Kola Peninsula and the Vishnevye Mountains, southern Urals) and Mongolia (the Khaldzan-Buragtag massif). The geological ages of the host massifs, the sample localities...

.... , Sal’nikova , E.B. , Kartashov , P.M. , Kovach , V.P. , Kozakov , I.K. , Kozlovskii , A.M. , Kotov , A.B. , Ponomarchuk , V.A. , Listratova , E.N. , Yakovleva , S.Z. , 2004a . The Khaldzan–Buregtei massif of peralkaline rare-metal igneous rocks: structure, geochronology...

... of the miscibility of the sources and the differentiation of alkali-granitoid and basic magmas in the Khaldzan–Buregtei massif and the Khaldzan–Buregtei rare-metal deposit, western Monoglia . Petrologiya 17 ( 2 ), 175 – 196 . Kozlov , V.D. , 2011...

... , V.I. , Yarmolyuk , V.V. , Sal’nikova , E.B. , Kartashov , P.M. , Kovach , V.P. , Kozakov , I.K. , Kozlovskii , A.M. , Kotov , A.B. , Ponomarchuk , V.A. , Listratova , E.N. , Yakovleva , S.Z. , 2004 . The Khaldzan–Buregtei massif of peralkaline rare-metal...

... and Zhou (2017) described replacement of chevkinite-(Ce) by allanite-(Ce) + aeschynite-(Ce) ± bastnäsite-(Ce) ± columbite-(Fe) ± ilmenite at Sin Quyen. A quartz-epidote metasomatite from the Khaldzan Buregtey massif is an example of alteration of a CGM proceeding directly to new phases ( Fig. 14d...

... reserve of 1.1 × 10 6 t of Nb 2 O 5 in ores grading 0.36 wt % ( Schulz et al., 2017 ). Niobium is also present in significant proportions in the pegmatites associated with peralkaline granites. For example, the Strange Lake (Canada), Khaldzan Buregtey (Mongolia), and Baerzhe (China) granites host...

... . Kovalenko V. Tsaryeva G. Goreglyad A. Yarmolyuk V. Troitsky V. Hervig R. Farmer G. ( 1995 ) The peralkaline granite-related Khaldzan-Buregtey rare metal (Zr, Nb, REE) deposit, western Mongolia . Economic Geology , 90 , 530 – 547 . Li C.Y. Zhang H. Wang F.Y...

... , E.B. , Kartashov , P.M. , Kovach , V.P. , Kozakov , I.K. , Kozlovskii , A.M. , Kotov , A.B. , Ponomarchuk , V.A. , Listratova , E.N. , Yakovleva , S.Z. , 2004a . The Khaldzan–Buregtei massif of peralkaline rare-metal igneous rocks: structure, geochronology...

... Lake complexes in eastern Canada ( Ansell et al. 1980 , Birkett et al. 1992 ), and Khaldzan – Buregtey pluton in Mongolia ( Kovalenko et al. 1995 ). Afrikanda is the first example of gittinsite occurring in carbonatitic assemblages. Calcium catapleiite and catapleiite are comparatively more...