 | | Journal (article/letter/editorial) | | Origin of K-cymrite and kokchetavite in the polyphase mineral inclusions from Kokchetav UHP calc-silicate...revealed the coexistence of kokchetavite and K-cymrite (KAlSi3O8H2O) in association with muscovite/phengite...rocks from the Kokchetav Complex (northern Kazakhstan). Experiments have shown that K-cymrite is stable under...UHPM rocks before. The mode of occurrence of K-cymrite and kokchetavite in these rocks is strong evidence...through the dehydration of K-cymrite. The presence of fluid inclusions and K-cymrite in the polyphase mineral |  | Hwang, Shyh-Lung, Shen, Pouyan, Chu, Hao-Tsu, Yui, Tzen-Fu, Liou, Juhn G., Sobolev, Nikolay V., Zhang, Ru-Yuan, Shatsky, Vladislav S., Zayachkovsky, Anton A. (2004) Kokchetavite: a new potassium-feldspar polymorph from the Kokchetav ultrahigh-pressure terrane. Contributions to Mineralogy and Petrology, 148 (3) 380-389 doi:10.1007/s00410-004-0610-2 | Journal (article/letter/editorial) | | Kokchetavite: a new potassium-feldspar polymorph from the Kokchetav ultrahigh-pressure terrane Received: 14 October...Springer-Verlag 2004 Abstract Kokchetavite, a new polymorph of K-feldspar (KAlSi3O8), has been identified as micrometer-size...garnetpyroxene rock from the Kokchetav ultrahigh-pressure terrane, Kazakhstan. Kokchetavite has a hexagonal...Zayachkovsky NEDRA Geological Expedition, 475013 Kokchetav, Kazakhstan concluded that kokchetavite could not be...might be metastably precipitated from an infiltrated K-rich melt during rock exhumation. Alternatively, although |  | | Journal (article/letter/editorial) | | thermodynamic calculations: examples from the Kokchetav Massif, Kazakhstan and the Sulu terrane, China HANS-JOACHIM...siliceous calcite-dolomite marble from the Kokchetav Massif, Kazakhstan and a dolomite marble from the UHP unit...rocks (Sulu terrane: 3.5–1.0 GPa around 6008C; Kokchetav Massif: 7 GPa—11008C to 0.65 GPa—7008C) are compatible...Orogen in Mali: Caby, 1994) and diamond (Kokchetav Massif, Kazakhstan: e.g. Ogasawara, 2009) in these rocks...Sulu terrane and in the Erzgebirge of the Bohemian Massif in central Europe, respectively, that the marbles |  | | Journal (article/letter/editorial) | | clinopyroxene (left) and garnet (right). Kokchetav massif, Kazakhstan Some chemical compounds adopt different...reach diameters of 0.3 mm, as seen at Kumdy Kol, Kazakhstan (FIG. 3B). In Experimental studies on the HP...spectacular pyrope quartzite rocks from the Dora-Maira massif, western Alps (Chopin 1984), was a hallmark event...and can be simply described by the KMASH system (K 2O–MgO– Al 2 O3 –SiO2 –H 2 O). As a result, the pyrope...retrograde quartz (Qz) in pyrope (Prp), Dora-Maira massif, Italy (PPL). (B) Same as (A) (XPL). (C) Twinned |  | | Journal (article/letter/editorial) | | situated in the northwestern edge of the Bohemian Massif, Central Europe, Massonne (1999) reported microdiamonds...quartzofeldspathic rocks of the Kokchetav Massif, Northern Kazakhstan (Hermann et al. 2001), where microdiamonds...allowed important conclusions regarding the source region of the crustal rocks that underwent subsequent...and Liu et al. (2001) for UHP rocks from the Kokchetav Massif and the Dabie-Sulu terrane, Eastern China...microprobe. The concentrations of Na, Mg, Al, Si, K, Ca, Ti, Cr, Mn, and Fe were determined with counting |  | | Journal (article/letter/editorial) | | garnet-clinopyroxene rock from the Kokchetav Massif, northern Kazakhstan a Kunihiko Sakamaki & Yoshihide...garnet-clinopyroxene rock from the Kokchetav Massif, northern Kazakhstan, International Geology Review, DOI:...garnet-clinopyroxene rock from the Kokchetav Massif, northern Kazakhstan Kunihiko Sakamaki* and Yoshihide...garnet-clinopyroxene rock from the Kumdy-Kol area of the Kokchetav Massif were characterized using micro-FT-IR spectroscopy...coexisting with supersilicic titanite contain exsolved K-feldspar and phengite lamellae and were classified |  | | Journal (article/letter/editorial) | | rocks from the Saxonian Erzgebirge and the Kokchetav Massif: are so-called diamondiferous gneisses magmatic...quartz-rich diamondiferous rocks from the Kokchetav Massif, especially the zonation of garnet, were studied...By this, the P^T paths, derived here for the Kokchetav rocks, and the textural observations it is concluded...metasediments (Erzgebirge: at T as high as 1200‡C, Kokchetav Massif: at 50^100‡C lower T) and ascended from at...deep portions of thickened continental crust (Kokchetav Massif: 45^50 km close to 800‡C, Erzgebirge: 55^60 |  | | Report (issue) | | 6404(6) Z=8 X-ray Powder Pattern: Kokchetav Massif, northern Kazakhstan. (selective area diffraction pattern)...64.6 18.0 15.5 < 0.3 100.1 (1) Kokchetav Massif, northern Kazakhstan; average of several EDS analyses... Distribution: From Kumdy-Kol, Kokchetav Massif, northern Kazakhstan. Name: For the locality of the first...first specimens, the Kokchetav Massif. Type Material: National Museum of Natural Science, Taichung, (Taiwan)...Kokchetavite: a new potassium-feldspar polymorph from the Kokchetav ultrahigh-pressure terrain. Contrib. Mineral. |  | Ferrero, Silvio, Ziemann, Martin A., Angel, Ross J., O’Brien, Patrick J., Wunder, Bernd (2016) Kumdykolite, kokchetavite, and cristobalite crystallized in nanogranites from felsic granulites, Orlica-Snieznik Dome (Bohemian Massif): not evidence for ultrahigh-pressure conditions. Contributions to Mineralogy and Petrology, 171 (1) doi:10.1007/s00410-015-1220-x | Journal (article/letter/editorial) | | felsic granulites, Orlica‑Snieznik Dome (Bohemian Massif): not an evidence for ultrahigh‑pressure conditions...kumdykolite and kokchetavite, polymorphs of albite and K-feldspar, respectively, together with cristobalite...granulites of the Orlica-Snieznik dome (Bohemian Massif) as the product of partial melt crystallization...granulites of the Orlica-Śnieżnik dome (Bohemian Massif) as polycrystalline inclusions (Ferrero et al....2009), while kokchetavite is a hexagonal polymorph of K-feldspar (Hwang et al. 2004). Both phases have been |  | | Journal (article/letter/editorial) | | pronounced than around moderately transformed coesite. No K-feldspar was observed in inclusions consisting of...replaced coesite. Thus, inclusions in omphacite of K-feldspar–quartz symplectites with abundant cracks...in Schmädicke (1991) show striking resemblance to K-feldspar–quartz inclusions reported in the same eclogites...(Massonne et al., 2000) and in those of the Su-Lu region, China (Yang et al., 1998), which cannot be simply...of the Erzgebirge, that is part of the Bohemian Massif, Massonne (1999) detected microdiamonds in hardly |  | Sokol, Alexander G., Kupriyanov, Igor N., Seryotkin, Yurii V., Sokol, Ella V., Kruk, Alexey N., Tomilenko, Anatoly A., Bul’bak, Taras A., Palyanov, Yury N. (2020) Cymrite as mineral clathrate: An overlooked redox insensitive transporter of nitrogen in the mantle. Gondwana Research, 79. 70-86 doi:10.1016/j.gr.2019.08.013 | Journal (article/letter/editorial) | | Journal Pre-proof Cymrite as Mineral Clathrate: An Overlooked Redox Insensitive Transporter of Nitrogen...Tomilenko, A.A., Bul’bak, T.A., Palyanov, Y.N., Cymrite as Mineral Clathrate: An Overlooked Redox Insensitive...Published by Elsevier B.V. All rights reserved. Cymrite as Mineral Clathrate: An Overlooked Redox Insensitive...N2/(NH3+N2) ratio varies from < 0.1 to ∼ 1. N-bearing K-cymrite is obtained in association with a kyanite-gar...systems stabilizes the K-cymrite structure. Muscovite does not convert to K-cymrite in the absence of NH3-N2-bearing |  | Berryman, Eleanor J., Wunder, Bernd, Wirth, Richard, Rhede, Dieter, Schettler, Georg, Franz, Gerhard, Heinrich, Wilhelm (2015) An experimental study on K and Na incorporation in dravitic tourmaline and insight into the origin of diamondiferous tourmaline from the Kokchetav Massif, Kazakhstan. Contributions to Mineralogy and Petrology, 169 (3) doi:10.1007/s00410-015-1116-9 | Journal (article/letter/editorial) | | 1007/s00410-015-1116-9 ORIGINAL PAPER An experimental study on K and Na incorporation in dravitic tourmaline and insight...of diamondiferous tourmaline from the Kokchetav Massif, Kazakhstan Eleanor J. Berryman · Bernd Wunder ·...relative incorporation of Na and K in dravitic tourmaline. Incorporation of K at the X-site increases with...a maximum of 0.71 K pfu (leaving 0.29 X-vacant sites pfu) was incorporated into K-dravite synthesized...zoned, and the dominant solid solution in the Na- and K-bearing system is between magnesio-foitite [□(Mg2Al) |  | | Journal (article/letter/editorial) | | cylinder device was measured over the range of 5–303 K using the heat capacity option of a physical properties...measured heat capacity data is 253.8 ± 0.6 J mol–1 K–1, which is considerably larger than some of the previous...boundaries, seven multi-anvil experiments at 1,400 K and 6.0–7.7 GPa suggest that no equilibrium stability...decomposition products of K-amphibole (K2CaMg5Si8O22(OH)2) at 14–16 GPa and above 1,473 K. Tronnes (2002) also...the decomposition products of K-richterite (KNaCaMg5Si8O22(OH)2) at 1,773 K above 10 GPa. Similar to the |  | Korsakov, Andrey V., Zhimulev, Egor I., Mikhailenko, Denis S., Demin, Sergey P., Kozmenko, Olga A. (2015) Graphite pseudomorphs after diamonds: An experimental study of graphite morphology and the role of H2O in the graphitisation process. Lithos, 236. 16-26 doi:10.1016/j.lithos.2015.08.012 | Journal (article/letter/editorial) | | ultra-high-pressure metamorphic rocks from the Kokchetav massif (Korsakov & Shatsky, 2004; Korsakov et al...in Fig. 8. They have two bands in the first-order region, at ~ 1360 (D1) and ~1580 (G) cm–1, with a shoulder...to experiments of Qian et al. (2001) at T = 1470 K and P = 2.0 GPa, the discrepancy between the effectiveness...surrounding diamond crystals in UHPM rocks from the Kokchetav massif (see their Fig. 7c–d). Therefore, this phenomenon...of fluid inclusions in UHPM diamonds from the Kokchetav and Erzgebirge (Dobrzhinetskaya et al., 2009; |  | | Journal (article/letter/editorial) | | Volume 94, pages 222–228, 2009 First record of K-cymrite in North Qaidam UHP eclogite, Western China Ru...abstRact Inclusions of polycrystalline K-feldspar aggregates after K-cymrite (KAlSi3O8·nH2O) were discovered...coesite. Some inclusions consist of almost end-member K-feldspar (Or99–100Ab0–1) polycrystalline aggregates...aggregates, whereas others are composed of >90 vol% K-feldspar (Or96–99Ab1–4) with minor secondary albite occurring...along the margins of the inclusions. Raman spectra of K-feldspar crystalline aggregates vary slightly reflecting |  | | Journal (article/letter/editorial) | | distinguished: the peak stage for the formation of H2O- and K-bearing omphacite (stage I), the exsolution of phengite...jadeite (Na, Al, and Si), forsterite (Mg), K-feldspar (K), wollastonite (Ca), hematite (Fe), rutile (Ti)...0.01 0.01 0.01 0.01 0.00 0.01 0.00 0.00 0.01 0.00 K 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00...101.50 101.80 Si Ti Al Cr Fe3+ Fe2+ Mn Mg Ca Na K Sum Jd 1851 1.99 0.01 0.38 0.00 0.00 0.11 0.00 0...0.06 0.50 6.65 Si Ti Al Cr Fe3+ Fe2+ Mn Mg Ca Na K Sum layers closest to the surface, which are detected |  | | Journal (article/letter/editorial) | | ultrahigh-pressure anatexis: fractionation of elements in the Kokchetav gneisses during melting at diamond-facies conditions...Berlin Heidelberg 2014 Abstract The Kokchetav complex in Kazakhstan contains garnet-bearing gneisses that...most characteristic trace element feature of the Kokchetav UHP restites is a strong depletion in light rare...fractionation observed during UHP anatexis in the Kokchetav gneisses is significantly different from depletions...Mineral Petrol (2014) 167:1002 The Kokchetav complex in Kazakhstan is ideal for the study of UHP melting |  | Dobrzhinetskaya, Larissa F., Green, Harry W., Weschler, Matthew, Darus, Mark, Wang, Young-Chung, Massonne, Hans-Joachim, Stöckhert, Bernhard (2003) Focused ion beam technique and transmission electron microscope studies of microdiamonds from the Saxonian Erzgebirge, Germany. Earth and Planetary Science Letters, 210 (3) 399-410 doi:10.1016/s0012-821x(03)00170-5 | Journal (article/letter/editorial) | | are characterized by different combinations of Si, K, P, Ti, and Fe in the presence of oxygen (stoichiometries...discovered more than 15 years ago in the Kokchetav massif, Kazakhstan [13], they have only recently been studied...be characterized by di¡erent combinations of Si, K, P, Ti, and Fe in the presence of oxygen. Additionally...Geological background and sampling The crystalline massif of the Erzgebirge is located in Saxony, Germany...younger strata. In the central part of the Erzgebirge massif, the socalled ‘gneiss^eclogite unit’ (GEU), ortho- |  | Zhang, L., Ellis, D. J., Arculus, R. J., Jiang, W., Wei, C. (2003) 'Forbidden zone' subduction of sediments to 150 km depth- the reaction of dolomite to magnesite + aragonite in the UHPM metapelites from western Tianshan, China. Journal of Metamorphic Geology, 21 (6) 523-529 doi:10.1046/j.1525-1314.2003.00460.x | Journal (article/letter/editorial) | | connect the Atbashy eclogite-blueschist belt in Kazakhstan which contains inclusions of coesite pseudomorphs...localities of coesite pseudomorphs in eclogites from Kazakhstan (Tagiri et al., 1995); open quadrangle: study...silica (Si) and spessartine (Mn), natural sanidine (K), pyrope (Mg), andradite (Fe, Ca), albite (Na, Al)...85 27.30 0.00 0.00 Si Al Fe3+ Ti Fe2+ Mg Mn Ca Na K 0.00 0.00 0.00 0.00 0.40 0.57 0.02 0.01 0.00 0.00...ARA IN METAPELITES 527 10 9 250 , sura 7 at &K ato S ( ag D2 + ar Mag Do1 Tianshan 6 1) 200 S |  | | Journal (article/letter/editorial) | | observed in pyrope quartzites from the Dora-Maira massif that contain at least three phases of silica replacing...regionally metamorphosed rocks of the Dora-Maira massif (Western Alps) by Chopin (1984) proved for the...samples included pyrope-quartzite from the DoraMaira massif, eclogites from the Dabie Shan and Sulu terranes...from the Western Gneiss Region of Norway. Sample 95YK4E from the Sulu region is of particular interest...replacing coesite in rocks from the Dora-Maira massif; herein we report for the first time the surprising |  | Liou, J. G., Zhang, R., Liu, F., Zhang, Z., Ernst, W. G. (2012) Mineralogy, petrology, U-Pb geochronology, and geologic evolution of the Dabie-Sulu classic ultrahigh-pressure metamorphic terrane, East-Central China. American Mineralogist, 97 (10) 1533-1543 doi:10.2138/am.2012.4169 | Journal (article/letter/editorial) | | been established for the microdiamond-bearing Kokchetav Massif. Thus far, however, diamond inclusions have...and/or K-bearing clinopyroxene, and aragonite + magnesite inclusions in garnet from Kokchetav microdiamond-bearing...HP granulites of the North Bohemian crystalline massif (Kotková et al. 2011). (3) Inclusions of polycrystalline...associated with a HP granulite in the Bohemian Massif (Naemura et al. 2011). These findings reveal that:...stabilities of coesite, diamond, jadeite, and K-cymrite (modified after Liou et al. 2004). (b) P-T stabilities |  | Song, S. G., Yang, J. S., Xu, Z. Q., Liou, J. G., Shi, R. D. (2003) Metamorphic evolution of the coesite-bearing ultrahigh-pressure terrane in the North Qaidam, Northern Tibet, NW China. Journal of Metamorphic Geology, 21 (6) 631-644 doi:10.1046/j.1525-1314.2003.00469.x | Journal (article/letter/editorial) | | quartz pseudomorphs after coesite and polycrystalline K-feldspar + quartz in eclogitic garnet and omphacite;...These lines of evidence demonstrate that the Dulan region is a UHP metamorphic terrane. In the North Dulan...eclogite and garnet-peridotite in the Luliangshan region. Subsequently, Yang et al. (1998) identified eclogite...zone between Alax Massif (the west part of North China Platform) and Qilian Massif. (b) Geological map...east-central China, the Kokchetav Massif of northern Kazakhstan, the Western Gneiss Region of Norway and the |  | | Journal (article/letter/editorial) | | + quartz + K,Mg-fich siliceous fluid = K-feldspar+ phlogopite + H20 (2) phengite + talc + K,Mg-rich siliceous...pressures bet~,een 15 and 30 kbar. The ascending K-rich fluids would penetrate the overlying mantle to... could lead to the formation of high-temperature K-rich magmas. Introduction Numerous experimental studies...observed the decomposition of K-feldspar + phlogopite to phengite and a K,Mg-rich siliceous fluid, which...and H20saturated system K20-MgO-AI203-SiO2-H20 ( K M A S H ) . This reaction, which is relevant to natural |  | | Journal (article/letter/editorial) | | plagioclase + quartz, (2) plagioclase + quartz + K-feldspar, and (3) barite + plagioclase + Kfeldspar...to trondhjemitic composition from the Münchberg Massif in Germany were ascribed to high-pressure (HP)...dehydration melting reaction: phengite + quartz = kyanite + K-feldspar + rutile + melt (Lang and Gilotti, 2007)...(Massonne, 2001; Massonne and Nasdala, 2003), Kokchetav in Kazakhstan (Mikhno and Korsakov, 2013; Mikhno et al...others attributed them to the former existence of K-cymrite and coesite (Massonne, 2001; Mikhno et al., 2013; |  | | Journal (article/letter/editorial) | | 16(Si + Al) and Z = 1. The ideal formula (Z = 2) is (K,Na)2(Mn,Fe)[(Nb,Ti)4 (Si4O12)2(O,OH)4]⋅6H2O. The IR...but is a minor mineral. It is also one of the few K-rich minerals to crystallize in the alkali granite...erosenbuschite group from the Langesundsfjord district, Norway: definition and crystal structure. Eur...the island of Vesle Arøya in the Langesundsfjord district, Vestfold, Norway. The pegmatite was heavily blasted...(catalogue no. 33974). P.C.P. KFe3+ 3 H8(PO4)6·6H2O K. Walenta, T. Theye (2004) KFe3+ 3 (H2PO4)2(HPO4)4·6H2O |
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