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![Fig. 1.]()
![Fig. 2.]()
O12 end-member. Yellow circle indicates the Sn-dominant analog of elbrusite, which was included in the least-squares fit.]()
![Raman spectra of trabzonite from the Upper Chegem caldera, Northern Caucasus. Spectra are as follows: (1) a pseudomorph (Fig. 2b); (2) a spherulite (Fig. 2a); (3) an aggregate with killalaite (Fig. 2c).]()
![Upper Chegem caldera: (a and b) BSE images of aggregates of pavlovskyite in cuspidine skarn. (c) BSE image of pavlovskyite-hillebrandite aggregate (after rankinite) in a rusinovite zone of skarn. (d–f) Quartz grain on the boundary between ignimbrite and skarn, the grain is partially replaced by pavlovskyite, rankinite, wollastonite, and hillebrandite aggregates. (d) BSE, (e) plane-polarized light, (f) crossed polarizers. Pav = pavlovskyite, Rus = rusinovite, Ran = rankinite, Wol = wollastonite, Cus = cuspidine, Wad = wadalite, Hil = hillebrandite, Q = quartz, Ap = fluorapatite, Hgr = hydrogrossular.]()
![Megawite and lakargiite in skarns of the Upper Chegem caldera: (a–c) spurrite skarns from xenolith no. 1; (a) megawite crystals are found only inside spurrite grains (magnified fragment is shown in inset), whereas lakargiite is widespread in both spurrite and wadalite-hydrocalumite-calcite aggregate; (b) spurrite crystal etched in 10% HCl with megawite and wadalite inclusions (a magnified image of a megawite crystal is shown in inset); (c) megawite and lakargiite in a fractured spurrite crystal (see description in the text); (d) pseudo-cubic crystals of high-Sn lakargiite overgrowing a porous aggregate of lakargiite and srebrodolskite from the chegemite zone of xenolith no. 7; (e) crystals of high-Sn lakargiite with external zones of megawite growing over a fine-grained lakargiite-wadalite-hibschite aggregate, burtite CaSn(OH)6 also occurs in this association; (f) megawite and garnet forming later zones in complex pseudomorphs after zircon, from the larnite-cuspidine zone of xenolith no. 3 (a zoned crystal comprising a lakargiite core and a megawite rim is shown inset). Arabic numerals show the sites of the EMPA analyses. Abbreviations are: Meg, megawite; Afw, afwillite; Brc, brucite; Brt, burtite; Cal, calcite; Chg, chegemite; Etr, ettringite; Hgr, hydrogrossular; Hil, hillebrandite; Hcl, hydrocalumite; Lak, lakargiite; Lar, larnite; Rnd, rondorfite; Sch, schorlomite; Spu, spurrite; Srb, srebrodolskite; Tot, toturite; Wad, wadalite.]()
![Raman spectra of killalaite: (1) on a cross-section approximately perpendicular to z from the Upper Chegem caldera, Northern Caucasus (Fig. 2d); (2) on a cross-section approximately parallel to z from the Upper Chegem caldera, Northern Caucasus (Fig. 2d); (3) intergrowths with trabzonite from the Upper Chegem caldera, Northern Caucasus (Fig. 2c); (4) on a specimen from Ikizdere, Turkey (Fig. 1).]()
![Raman spectra of killalaite in the OH region: (1) on a cross-section approximately perpendicular to z from the Upper Chegem caldera, Northern Caucasus (Fig. 2d); (2) on a cross-section approximately parallel to z from the Upper Chegem caldera, Northern Caucasus (Fig. 2d); (3) intergrowths with trabzonite from the Upper Chegem caldera, Northern Caucasus (Fig. 2c); (4) specimen from Ikizdere, Turkey (Fig. 1).]()
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1-20 OF 89 RESULTS FOR
Upper Chegem Caldera
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1
Journal Article
FLUORCHEGEMITE, Ca 7 (SiO 4 ) 3 F 2 , A NEW MINERAL FROM THE EDGREWITE-BEARING ENDOSKARN ZONE OF AN ALTERED XENOLITH IN IGNIMBRITES FROM UPPER CHEGEM CALDERA, NORTHERN CAUCASUS, KABARDINO-BALKARIA, RUSSIA: OCCURRENCE, CRYSTAL STRUCTURE, AND NEW DATA ON THE MINERAL ASSEMBLAGES Available to Purchase
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 16 September 2015
The Canadian Mineralogist (2015) 53 (2): 325–344.
... (SiO 4 ) 3 (ОН) 2 [ Pbnm , a 5.0696(1), b 11.3955(1), c 23.5571(3) Å, V 1360.91(4) Å 3 , Z = 4], was found in an edgrewite-bearing zone of endoskarn at the contact of a large altered calciferous xenolith within ignimbrites of the Upper Chegem Caldera, Northern Caucasus, Kabardino-Balkaria, Russia...
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Journal Article
Irinarassite Ca 3 Sn 2 SiAl 2 O 12 – new garnet from the Upper Chegem Caldera, Northern Caucasus, Kabardino-Balkaria, Russia Available to Purchase
Journal: Mineralogical Magazine
Published: 01 August 2013
Mineralogical Magazine (2013) 77 (6): 2857–2866.
...I. O. Galuskina; E. V. Galuskin; K. Prusik; V. M. Gazeev; N. N. Pertsev; P. Dzierżanowski Abstract Irinarassite, Ca 3 Sn 2 SiAl 2 O 12 , a new mineral species of the garnet supergroup was discovered in metasomatically altered carbonate-silicate xenoliths in ignimbrites of the Upper Chegem Caldera...
FIGURES
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Journal Article
Dzhuluite, Ca 3 SbSnFe 3+ 3 O 12 , a new bitikleite-group garnet from the Upper Chegem Caldera, Northern Caucasus, Kabardino-Balkaria, Russia Available to Purchase
Journal: European Journal of Mineralogy
Publisher: GeoScienceWorld Journals
Published: 01 May 2013
European Journal of Mineralogy (2013) 25 (2): 231–239.
..., was discovered in a kumtyubeite zone in close proximity to the contact with unaltered ignimbrite in a skarn xenolith from the Upper Chegem Caldera, Northern Caucasus, Russia. The empirical formula of the holotype dzhuluite is (Ca 2.954 Fe 2+ 0.043 Mg 0.003 ) ∑3.000 (Sn 0.850 Sb 5+ 0.764 Zr 0.121 U 6+ 0.127 Ti 4...
FIGURES
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Includes: Supplemental Content
Journal Article
Edgrewite Ca 9 (SiO 4 ) 4 F 2 -hydroxyledgrewite Ca 9 (SiO 4 ) 4 (OH) 2 , a new series of calcium humite-group minerals from altered xenoliths in the ignimbrite of Upper Chegem caldera, Northern Caucasus, Kabardino-Balkaria, Russia Available to Purchase
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 November 2012
American Mineralogist (2012) 97 (11-12): 1998–2006.
... skarn within the Upper Chegem caldera, Northern Caucasus, Kabardino-Balkaria, Russia. The xenolith containing the two new minerals crops out on the slope of the small ridge joining Lakargi and Vorlan peaks at 3240 m above the sea level and 7 km from the Balkarian village Eltyubyu. Other Ca humite group...
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Journal Article
Pavlovskyite Ca 8 (SiO 4 ) 2 (Si 3 O 10 ): A new mineral of altered silicate-carbonate xenoliths from the two Russian type localities, Birkhin massif, Baikal Lake area and Upper Chegem caldera, North Caucasus Available to Purchase
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 April 2012
American Mineralogist (2012) 97 (4): 503–512.
... with dellaite Ca 6 (Si 2 O 7 )(SiO 4 )(OH) 2 around galuskinite Ca 7 (SiO 4 ) 3 CO 3 veins cutting calcio-olivine skarns in the Birkhin gabbro massif. In addition, skeletal pavlovskyite occurs in cuspidine zones of altered carbonate xenoliths in the ignimbrites of the Upper Chegem caldera (North Caucasus...
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Includes: Supplemental Content
Journal Article
Rusinovite, Ca 10 (Si 2 O 7 ) 3 Cl 2 : a new skarn mineral from the Upper Chegem caldera, Kabardino-Balkaria, Northern Caucasus, Russia Available to Purchase
Journal: European Journal of Mineralogy
Publisher: GeoScienceWorld Journals
Published: 01 October 2011
European Journal of Mineralogy (2011) 23 (5): 837–844.
... of the Upper Chegem volcanic caldera. The mineral is named after Vladimir Leonidovich Rusinov (1935–2007), a Russian petrologist and expert in the field of thermodynamics of non-equilibrium mineral systems. A synthetic analogue of rusinovite is also known. The new mineral has an OD structure of which only...
FIGURES
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Journal Article
Megawite, CaSnO 3 : a new perovskite-group mineral from skarns of the Upper Chegem caldera, Kabardino-Balkaria, Northern Caucasus, Russia Available to Purchase
Journal: Mineralogical Magazine
Published: 01 October 2011
Mineralogical Magazine (2011) 75 (5): 2563–2572.
...E. V. Galuskin; I. O. Galuskina; V. M. Gazeev; P. Dzierżanowski; K. Prusik; N. N. Pertsev; A. E. Zadov; R. Bailau; A. G. Gurbanov Abstract Megawite is a perovskite-group mineral with an ideal formula CaSnO 3 that was discovered in altered silicate-carbonate xenoliths in the Upper Chegem caldera...
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Journal Article
Vorlanite (CaU 6+ )O 4 —A new mineral from the Upper Chegem caldera, Kabardino-Balkaria, Northern Caucasus, Russia Available to Purchase
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 January 2011
American Mineralogist (2011) 96 (1): 188–196.
... = 4–5, VHN 10 = 360 kg/mm 2 , was found near the top of Mt. Vorlan in a calcareous skarn xenolith in ignimbrite of the Upper Chegem caldera in the Northern Caucasus, Kabardino-Balkaria, Russia. Vorlanite occurs as aggregates of black platy crystals up to 0.3 mm long with external symmetry 3̅ m...
FIGURES
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Includes: Supplemental Content
Journal Article
Elbrusite-(Zr)—A new uranian garnet from the Upper Chegem caldera, Kabardino-Balkaria, Northern Caucasus, Russia Available to Purchase
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 August 2010
American Mineralogist (2010) 95 (8-9): 1172–1181.
... , a new uranian garnet ( Ia <ovl>3</ovl> d , a ≈ 12.55 Å, V ≈ 1977 Å 3 , Z = 8), within the complex solid solution elbrusite-kimzeyite-toturite Ca 3 (U,Zr,Sn,Ti,Sb,Sc,Nb...) 2 (Fe,Al,Si,Ti) 3 O 12 was discovered in spurrite zones in skarn xenoliths of the Upper Chegem caldera. The empirical...
FIGURES
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Image
Geological map of the Upper Chegem Caldera (after Gazeev et al . 2006 an... Available to Purchase
in FLUORCHEGEMITE, Ca 7 (SiO 4 ) 3 F 2 , A NEW MINERAL FROM THE EDGREWITE-BEARING ENDOSKARN ZONE OF AN ALTERED XENOLITH IN IGNIMBRITES FROM UPPER CHEGEM CALDERA, NORTHERN CAUCASUS, KABARDINO-BALKARIA, RUSSIA: OCCURRENCE, CRYSTAL STRUCTURE, AND NEW DATA ON THE MINERAL ASSEMBLAGES
> The Canadian Mineralogist
Published: 16 September 2015
F ig . 1. Geological map of the Upper Chegem Caldera (after Gazeev et al . 2006 and Galuskin et al . 2009 , simplified). The inset map shows the location of Kabardino-Balkaria. Legend: (1–5) Formations of different ages of the volcanic basement. 1,2 Structural zone of the Greater Caucasus
Image
(A) General view of the northwest part of the Upper Chegem Caldera; numbers... Available to Purchase
in FLUORCHEGEMITE, Ca 7 (SiO 4 ) 3 F 2 , A NEW MINERAL FROM THE EDGREWITE-BEARING ENDOSKARN ZONE OF AN ALTERED XENOLITH IN IGNIMBRITES FROM UPPER CHEGEM CALDERA, NORTHERN CAUCASUS, KABARDINO-BALKARIA, RUSSIA: OCCURRENCE, CRYSTAL STRUCTURE, AND NEW DATA ON THE MINERAL ASSEMBLAGES
> The Canadian Mineralogist
Published: 16 September 2015
F ig . 2. (A) General view of the northwest part of the Upper Chegem Caldera; numbers indicate xenoliths and their positions. Xenoliths are distinguished on the ignimbrite background by a white color. (B) xenolith no. 1 in the foreground, type locality of fluorchegemite. The distance between
Image
O12 end-member. Yellow circle indicates the Sn-dominant analog of elbrusite, which was included in the least-squares fit.](https://gsw.silverchair-cdn.com/gsw/Content_public/Journal/ammin/98/4/10.2138_am.2013.4201/5/s_0785f4.jpeg?Expires=2147483647&Signature=2mCnSX2rmBRVMziJYfuU3mA0Y1KQo~pb3yRD7W23EW9YwWQjkXGKc2F9MDBqIrHkRC736UjJm786nqHzN40zJCu1Re6tB4dVkyPlPS46uPTZ2PGEc5o9P~eI8PO1EltOxvyYSWuoKPAVf2KV7-hSGSsUhOi~vMFLNAG5J-Qoq7oruKHporrRlLWxm~W0ccj4HyvOKCWzITzF0QVVuAdoRuz91vf2M1V0D-7NrTrQ4No4vqRm8rsZExAsrMGZvSdhCB~LZGts7LnmcblDrQaDDK7QhCXQwMYRldIK7v0RvYc5sTasnzfCbd88m7KisacmegHWISNtZt4kBE7RifqLpQ__&Key-Pair-Id=APKAIE5G5CRDK6RD3PGA)
Compositions of U-rich garnets from the Upper Chegem caldera, Northern Cauc... Available to Purchase
Published: 01 April 2013
Figure 4 Compositions of U-rich garnets from the Upper Chegem caldera, Northern Caucasus, Russia ( Galuskina et al. 2010a ; Utsunomiya et al. 2002 ). The red lines mark the boundaries between elbrusite, kerimasite and an unnamed species based on the relative proportions of the kerimasite end
Image
Raman spectra of trabzonite from the Upper Chegem caldera, Northern Caucasu... Available to Purchase
in Trabzonite, Ca 4 [Si 3 O 9 (OH)]OH: crystal structure, revised formula, new occurrence and relation to killalaite
> Mineralogical Magazine
Published: 01 June 2012
F ig . 3. Raman spectra of trabzonite from the Upper Chegem caldera, Northern Caucasus. Spectra are as follows: (1) a pseudomorph ( Fig. 2 b ); (2) a spherulite ( Fig. 2 a ); (3) an aggregate with killalaite ( Fig. 2 c ).
Image
Upper Chegem caldera: ( a and b ) BSE images of aggregates of pavlovskyit... Available to Purchase
in Pavlovskyite Ca 8 (SiO 4 ) 2 (Si 3 O 10 ): A new mineral of altered silicate-carbonate xenoliths from the two Russian type localities, Birkhin massif, Baikal Lake area and Upper Chegem caldera, North Caucasus
> American Mineralogist
Published: 01 April 2012
Figure 2 Upper Chegem caldera: ( a and b ) BSE images of aggregates of pavlovskyite in cuspidine skarn. ( c ) BSE image of pavlovskyite-hillebrandite aggregate (after rankinite) in a rusinovite zone of skarn. ( d – f ) Quartz grain on the boundary between ignimbrite and skarn, the grain
Image
Megawite and lakargiite in skarns of the Upper Chegem caldera: ( a – c ) sp... Available to Purchase
in Megawite, CaSnO 3 : a new perovskite-group mineral from skarns of the Upper Chegem caldera, Kabardino-Balkaria, Northern Caucasus, Russia
> Mineralogical Magazine
Published: 01 October 2011
F ig . 1. Megawite and lakargiite in skarns of the Upper Chegem caldera: ( a – c ) spurrite skarns from xenolith no. 1; ( a ) megawite crystals are found only inside spurrite grains (magnified fragment is shown in inset), whereas lakargiite is widespread in both spurrite and wadalite
Image
Raman spectra of killalaite: (1) on a cross-section approximately perpendic... Available to Purchase
in Trabzonite, Ca 4 [Si 3 O 9 (OH)]OH: crystal structure, revised formula, new occurrence and relation to killalaite
> Mineralogical Magazine
Published: 01 June 2012
F ig . 4. Raman spectra of killalaite: (1) on a cross-section approximately perpendicular to z from the Upper Chegem caldera, Northern Caucasus ( Fig. 2 d ); (2) on a cross-section approximately parallel to z from the Upper Chegem caldera, Northern Caucasus ( Fig. 2 d ); (3) intergrowths
Image
Raman spectra of killalaite in the OH region: (1) on a cross-section approx... Available to Purchase
in Trabzonite, Ca 4 [Si 3 O 9 (OH)]OH: crystal structure, revised formula, new occurrence and relation to killalaite
> Mineralogical Magazine
Published: 01 June 2012
F ig . 5. Raman spectra of killalaite in the OH region: (1) on a cross-section approximately perpendicular to z from the Upper Chegem caldera, Northern Caucasus ( Fig. 2 d ); (2) on a cross-section approximately parallel to z from the Upper Chegem caldera, Northern Caucasus ( Fig. 2 d ); (3
Journal Article
Mayenite supergroup, part II: Chlorkyuygenite from Upper Chegem, Northern Caucasus, Kabardino-Balkaria, Russia, a new microporous mineral with “zeolitic” H 2 O Available to Purchase
Journal: European Journal of Mineralogy
Publisher: GeoScienceWorld Journals
Published: 01 January 2015
European Journal of Mineralogy (2015) 27 (1): 113–122.
...)Å, V =1740.34(3)Å 3 ), was discovered as an accessory mineral in Ca-humite zones of calcareous skarn xenoliths in ignimbrites of the Upper Chegem Caldera, Northern Caucasus, Kabardino-Balkaria, Russia. Rounded grains and crystals with tris-tetrahedral form of chlorkyuygenite up to 50μm and aggregates...
FIGURES
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Journal Article
Vorlanite, (CaU 6+ )O 4 , from Jabel Harmun, Palestinian Autonomy, Israel Available to Purchase
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 November 2013
American Mineralogist (2013) 98 (11-12): 1938–1942.
... Upper Chegem caldera, Northern Caucasus. Heating above 750 °C of dark-gray vorlanite from the Jabel Harmun, as well as dark-red vorlanite from Caucasus, led to formation of yellow trigonal uranate CaUO 4 . The unusual color of vorlanite from Jabel Harmun is assumed to be related to small impurities...
FIGURES
Journal Article
Eltyubyuite, Ca 12 Fe 3+ 10 Si 4 O 32 Cl 6 – the Fe 3+ analogue of wadalite: a new mineral from the Northern Caucasus, Kabardino-Balkaria, Russia Available to Purchase
Journal: European Journal of Mineralogy
Publisher: GeoScienceWorld Journals
Published: 01 May 2013
European Journal of Mineralogy (2013) 25 (2): 221–229.
... Al 10 Si 4 O 32 Cl 6 , was discovered in altered silicate-carbonate xenoliths in the diatreme facies of ignimbrites in the Upper Chegem caldera, Kabardino-Balkaria, Northern Caucasus, Russia. Eltyubyuite forms light-brown or yellow crystals with tetrahedral habit up to 10 μm across in rondorfite...
FIGURES
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Includes: Supplemental Content
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