 | | Journal (article/letter/editorial) | | graphite and iron sulfides within the Kokchetav Precambrian massif and in other areas of Tien Shan, Finland...substances in Precambrian bodies. Within the Kokchetav massif, the association of graphitic sulfide-containing...the USSR Academy of Sciences, and the Central Kazakhstan Geological Board. The Russian term "formatsiya...the section in a ditch southwest of the town of Kokchetav, on the eastern boundary of the Chaglinka sovkhoz...of Ken-Utkul' to the southwest of the town of Kokchetav). A marble member about 5 m thick is exposed here; |  | Ohta, M, Mock, T, Ogasawara, Y, Rumble, D (2003) Oxygen, carbon, and strontium isotope geochemistry of diamond-bearing carbonate rocks from Kumdy-Kol, Kokchetav Massif, Kazakhstan. Lithos, 70 (3) 77-90 doi:10.1016/s0024-4937(03)00093-8 | Journal (article/letter/editorial) | | diamond-bearing carbonate rocks from Kumdy-Kol, Kokchetav Massif, Kazakhstan M. Ohta a, T. Mock b, Y. Ogasawara a...Diamond-bearing carbonate rocks from Kumdy-Kol, Kokchetav massif, Kazakhstan, were strongly altered by fluids flowing...an area measuring 100 10 km in the Kokchetav massif, Kazakhstan (Sobolev and Shatsky, 1990; Shatsky...map and sample locations of Kumdy-Kol, Kokchetav massif, Kazakhstan. Outcrops include eclogite, amphibolite...1995; Zhang et al., 1997; Okamoto et al., 2000). Kokchetav microdiamonds define a unique population in relation |  | | 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 |  | Buslov, M.M., Dobretsov, N.L., Vovna, G.M., Kiselev, V.I. (2015) Structural location, composition, and geodynamic nature of diamond-bearing metamorphic rocks of the Kokchetav subduction-collision zone of the Central Asian Fold Belt (northern Kazakhstan) Russian Geology and Geophysics, 56 (1) 64-80 doi:10.1016/j.rgg.2015.01.004 | Journal (article/letter/editorial) | | of the Kokchetav subduction–collision zone of the Central Asian Fold Belt (northern Kazakhstan) M.M. Buslov...their protolith to the sedimentary rocks of the Kokchetav microcontinent. The structural location of the...accretion–collision zone evidences that the subduction of the Kokchetav microcontinent beneath the Vendian–Cambrian Ishim–Selety...metamorphic rocks. The sedimentary rocks of the Kokchetav microcontinent, which are enriched in graphite...geochronology; geochemistry; Kokchetav microcontinent Introduction Northern Kazakhstan is part of the Late |  | | Journal (article/letter/editorial) | | microdiamond in UHP dolomite marble from Kokchetav Massif, Kazakhstan H. ISHIDA,1 Y. OGASAWARA,1 K. OHSUMI2...microdiamond in dolomite marble from Kumdy-kol in the Kokchetav Massif, are unusual; a previous study estimated the...distinct stages. Key words: dolomite marble; Kokchetav Massif; microdiamond; micro-Laue diffraction; ultrahigh-pressure...1999). The microdiamonds in the Kokchetav Massif, northern Kazakhstan are of crustal origin, formed during...in China (Xu et al., 1992), the Western Gneiss Region in Norway (Dobrzhinetskaya et al., 1995), Saxonian |  | | Journal (article/letter/editorial) | | clinopyroxene silicate rocks in the Kokchetav metamorphic massif, northern Kazakhstan. They argued (in their 5th...that the KCpx inclusions in garnet from the Kokchetav massif resulted from the crystallization of pyroxene...The K-feldspar (Kfs) blebs in Cpx from the Kokchetav massif have different occurrences and consequently...Cpx from the Kokchetav massif. 2. The occurrence of Kfs in Cpx from the Kokchetav massif The samples...collected from the Kumdy – Kol area in the Kokchetav massif, which contain up to 50% calcite, and were |  | | Journal (article/letter/editorial) | | together with uvarovite within albite vein of a tremolite rock. Compositions of analyzed clinopyroxene consist...found in microcracks within albite vein of a tremolite rock from the Osayama serpentinite mélange (OSM)...1). In the OSM, two types of tremolite-rich rock occur: high-P tremolite schist of peridotite-origin (type-I)...(type-I), and low-P tremolite-rich rind at the boundaries between blueschist blocks and serpentinite...of type-I schists. On the other hand, type-II tremolite rind is relatively massive and does not contain |  | | Journal (article/letter/editorial) | | amphibole, ilmenite, Mg-Al spinel, magnetite, tremolite, orthopyroxene, and olivine. Diopside contains...clinopyroxenes in the UHP marble from the Kokchetav massif (Zhu & Ogasawara, 2002a) and Kfeldspar exsolution...bounded by the sinistral Tan-Lu fault to the Su-Lu region. This HP and UHP belt extends for about 320 km...dolomite marble (Zhu & Ogasawara, 2002b) in the Kokchetav massif. The low Si contents (mostly <1.97 apfu) in...grains with Na2O-rich cores rimmed by Na2O-poor tremolite or hornblende observed in garnet peridotite from |  | | Journal (article/letter/editorial) | | potential of metamorphic rocks in the Kokchetav Massif, northern Kazakhstan Victor A. PECHNIKOV1 and Felix V...There are two known diamondiferous bodies in Kazakhstan, the Kumdy-Kol deposit and the Barchi-Kol occurrence...belt that outcrops at the central part of the Kokchetav Massif. The metamorphic belt is interpreted as a...of the metamorphic rocks. Key-words: diamond, Kazakhstan, metamorphism, genesis, carbon. 1. Introduction...The history of diamond discoveries in Northern Kazakhstan began in 1967, when I.F. Kashkarov and Yu.A. |  | | Journal (article/letter/editorial) | | Garnet–Clinopyroxene Rocks from the KumdyKol Mine (Kokchetav Massif, Kazakhstan) A. O. Mikhno and A. V. Korsakov Presented...DOI: 10.1134/S1028334X12120100 Rocks of the Kokchetav massif, among which a special role is played by ...mondbearing crustal carbonate–silicate rocks of the Kokchetav massif [4] and then in diamondfree variet ies [5...clinopyroxenes in carbonate–silicate rocks of the Kokchetav massif strongly depleted in potassium is currently...clinopy roxene during exhumation of rocks of the Kokchetav massif [8]. In spite of the differences in mechanisms |  | | Journal (article/letter/editorial) | | KUMDY-KOL AND BARCHI-KOL DEPOSITS, KOKCHETAV MASSIF, NORTHERN KAZAKHSTAN Victor A. PECHNIKOV Central Research...and Barchi-Kol deposits in the Kokchetav Massif, northern Kazakhstan, varies widely from less than one...diamond in the metamorphic sequence of the Kokchetav Massif. Keywords: diamond, metamorphic rocks, factor...factor analysis, Kumdy-Kol, Barchi-Kol, Kokchetav Massif, Kazakhstan. Sommaire La teneur en diamant des...et Barchi-Kol, associés au massif de Kokchetav, dans le nord du Kazakhstan, varie beaucoup, de moins d’un |  | | Journal (article/letter/editorial) | | southern Dora-Maira massif and Lago di Cignana in the Western Alps, the Dabie Shan-Sulu region in northeastern...northeastern China, the Kokchetav massif in northern Kazakhstan, and the Western Gneiss Region of the Scandinavian...preserving rare coesite relics. In the Dora-Maira massif, the Brossasco-Isasca Unit includes coesite-bearing...jadeitealmandine orthogneiss. In the Dabie Shan-Sulu region, felsic rocks with clear evidence of UHPM include...also may have been subjected to UHPM. In the Kokchetav massif, microdiamond-bearing rocks include garnet-biotite |  | | Journal (article/letter/editorial) | | belt of east-central China, the Kokchetav Complex of northern Kazakhstan, the Maksyutov Complex of the...Urals, the Dora Maira Massif of the Western Alps, and the Western Gneiss Region of southwestern Norway...belt of east-central China, the Kokchetav Massif of northern Kazakhstan, the Maksyutov Complex of the southern...Urals, the Dora Maira Massif of the Western Alps, and the Western Gneiss Region of Norway. Figure 1 presents...observed structural relationships. The Kokchetav Complex The Kokchetav Complex occurs as an isolated tectonic |  | | 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...depths. Keywords: micro-FT-IR; Kokchetav Massif; northern Kazakhstan; UHP metamorphism; hydroxyl; H2 |  | Ferrando, Simona, Groppo, Chiara, Frezzotti, Maria Luce, Castelli, Daniele, Proyer, Alexander (2017) Dissolving dolomite in a stable UHP mineral assemblage: Evidence from Cal-Dol marbles of the Dora-Maira Massif (Italian Western Alps) American Mineralogist, 102 (1) 42-60 doi:10.2138/am-2017-5761 | Journal (article/letter/editorial) | | Evidence from Cal-Dol marbles of the Dora-Maira Massif (Italian Western Alps) Simona Ferrando1,*, Chiara...The UHP impure Cal-Dolmarbles from the Dora-Maira Massif are studied to investigate the poorly known evolution...2003; Ferrando et al. 2005; Gao et al. 2014), Kokchetav (e.g., Dobrzhinetskaya et al. 2003; Hwang et al...2006; Korsakov and Hermann 2006), Western Gneiss Region (e.g., Svensen et al. 1999; Carswell and van Roermund...subduction regimes, such as that recorded by the Kokchetav Massif, the possible melting of carbonates can generate |  | Götze, Jens, Schertl, Hans-Peter, Neuser, Rolf D., Kempe, Ulf, Hanchar, John M. (2013) Optical microscope-cathodoluminescence (OM–CL) imaging as a powerful tool to reveal internal textures of minerals. Mineralogy and Petrology, 107 (3) 373-392 doi:10.1007/s00710-012-0256-0 | Journal (article/letter/editorial) | | cha-chalcedony) in a pyrope quartzite from Parigi, Dora Maira Massif; b Zircon crystal from the Erzgebirge, Germany...ultra-high pressure metamorphic rock from the Kokchetav massif, Kazakhstan; g Primary growth zones (progressive...examples have been reported from UHP-rocks of the Kokchetav Massif (Schertl et al. 2004) showing exsolved blue...in a Cretaceous sandstone from the Upper Lusatia region, Germany (arrows); g Weathering and kaolinization...Different minerals in a granite from the Krkonosze Massif, Poland displaying distinct features of magma mixing; |  | | Journal (article/letter/editorial) | | received some attention, mainly in the Dabie-Sulu region of eastern China (Wang & Liou, 1993; Ye & Hirajima..., 1998; Tang et al., 2006) and the Kokchetav massif of Kazakhstan (e.g. Ogasawara et al., 2000; Katayama...metamorphic event. The metamorphic history of this region is well established, with peak metamorphic conditions...epidote; e) X-ray distribution image for Si (same region as in 5b): quartz (white), albite (medium grey)...Mg5 Si8 O22 ðOHÞ2 þCaCO3 þ Ca2þ : quartz (3) tremolite (1c) Hence, the marginal replacement of omphacite |  | | Journal (article/letter/editorial) | | years ago when coesite was found in the Dora Maira Massif, Alps (Chopin 1984). This provides evidence that...mafic, pelitic and granitic rocks of the Dora Maira Massif (Compagnoni et al. 1995), display a very limited...with kyanite from white schists of the Dora Maira Massif as prograde inclusion in garnet. The experiments...micro diamonds from gneisses of the Kokchetav Massif, Kazakhstan, have been regarded to form at UHP conditions...omphacites from the UHP unit of the Dora Maira Massif (Kienast et al. 1991), where peak metamorphism |  | | Journal (article/letter/editorial) | | years ago when coesite was found in the Dora Maira Massif, Alps (Chopin 1984). This provides evidence that...mafic, pelitic and granitic rocks of the Dora Maira Massif (Compagnoni et al. 1995), display a very limited...with kyanite from white schists of the Dora Maira Massif as prograde inclusion in garnet. The experiments...micro diamonds from gneisses of the Kokchetav Massif, Kazakhstan, have been regarded to form at UHP conditions...omphacites from the UHP unit of the Dora Maira Massif (Kienast et al. 1991), where peak metamorphism |  | TAGIRI, Michio, TAKIGUCHI, Shingo, ISHIDA, Chika, NOGUCHI, Takaaki, KIMURA, Makoto, BAKIROV, Apas, SAKIEV, Kadyrbek, TAKAHASHI, Masaki, TAKASU, Akira, BAKIROV, Azamat, TOGONBAEVA, Asel, SUZUKI, Akio (2010) Intrusion of UHP metamorphic rocks into the upper crust of Kyrgyzian Tien-Shan: P-T path and metamorphic age of the Makbal Complex. Journal of Mineralogical and Petrological Sciences, 105 (5) 233-250 doi:10.2465/jmps.071025 | Journal (article/letter/editorial) | | Zhang et al. (1997) and Hermann et al. (2001), Kokchetav UHPM rocks rose at a rate of approximately 10...high uplift velocities of 60 200 mm/year for the Kokchetav UHPM rocks; however, the exhumation mechanism...eclogite lenses can be clearly observed in the Makbal district. Eclogite lenses are included in these pelitic...Caledonian fold belt extending through Central Kazakhstan (Bakirov et al., 1998) and the southern Urals...Urals (Chemenda et al., 1997). The Makbal district is located in the western part of the Kyrgyz Range, and |  | Liu, Penglei, Wu, Yao, Chen, Yi, Zhang, Junfeng, Jin, Zhenmin (2015) UHP impure marbles from the Dabie Mountains: Metamorphic evolution and carbon cycling in continental subduction zones. Lithos, 212. 280-297 doi:10.1016/j.lithos.2014.11.018 | Journal (article/letter/editorial) | | proposed for the dolomite marbles from the Kokchetav Massif (Zhu and Ogasawara, 2002) and for the magnesite-bearing...impure marbles from the Ganjialing area in this region. Coesite relicts are discovered as inclusions within...Sps—spessartine, Sym—symplectite, Tlc—talc, Tr—tremolite, Ttn—titanite, Wo—wollastonite and Zoi—zoisite...varieties of impure marbles, i.e. clinopyroxene and tremolite marbles, were identified based on the index silicate...garnetbearing and garnet-absent marbles. Basically, the tremolite marbles have a low-pressure mineral assemblage |  | Liu, Penglei, Massonne, Hans-Joachim, Jin, Zhenmin, Wu, Yao, Zhang, Junfeng (2017) Diopside, apatite, and rutile in an ultrahigh pressure impure marble from the Dabie Shan, eastern China: A record of eclogite-facies metasomatism during exhumation. Chemical Geology, 466. 123-139 doi:10.1016/j.chemgeo.2017.06.001 | Journal (article/letter/editorial) | | Regarding fluid evolution, UHP rocks from this region have drawn much attention from various isotopic...Zircon UePb dating on different rocks from this region suggested that the peak UHP metamorphism happened...index silicate phases: i.e., clinopyroxene and tremolite marbles (Liu et al., 2015). Earlier studies on...of talc + calcite is much thinner than that of tremolite + calcite, indicating that the former phases formed...Rare rutile grains reacted with diopside to form tremolite + titanite ± plagioclase (Fig. 2e): Di + Ru + |  | Aoki, Kazumasa, Kitajima, Kouki, Masago, Hideki, Nishizawa, Manabu, Terabayashi, Masaru, Omori, Soichi, Yokoyama, Takaomi, Takahata, Naoto, Sano, Yuji, Maruyama, Shigenori (2009) Metamorphic P–T–time history of the Sanbagawa belt in central Shikoku, Japan and implications for retrograde metamorphism during exhumation. Lithos, 113 (3) 393-407 doi:10.1016/j.lithos.2009.04.033 | Journal (article/letter/editorial) | | related clastic rocks and gabbros from a mid-ocean region (e.g., Okamoto et al., 2000a; Terabayashi et al...2clinochlore þ 4albite ¼ 2glaucophane þ amesite þ 2H2 O tremolite þ daphnite ¼ ferroactinolite þ clinochlore ð9Þ...162albite ¼ 88glaucophane þ 48clinozoisite ð12Þ tremolite þ tschermakite þ 2albite ¼ 2pargasite þ 8quartz...known (e.g., Himalaya, Kaneko et al., 2003; Kokchetav massif, We thank Y. Kon, T. Kawai and S. Tsuruoka...ultrahigh-pressure–high-pressure rocks of the Kokchetav Massif, northern Kazakhstan. The Island Arc 9, 417–427. Kawato |  | | Journal (article/letter/editorial) | | Appalachian Blue Ridge (ABR) and Western Gneiss Region (WGR) suggest that the symplectite forming reactions...Eclogite Eastern Blue Ridge Western Gneiss Region P–T path Retrograde Isothermal decompression...features of metabasites from the Western Gneiss Region of Norway. 123 254 Contrib Mineral Petrol (2007)... Studies of retrograde reactions from Bohemian Massif eclogites (Messiga and Bettini 123 1990), and...Appalachian orogen (USA), and the Western Gneiss Region (WGR) of Norway have been examined in detail. Most |  | Zhang, R. Y., Liou, J. G., Yang, J. S., Ye, K. (2003) Ultrahigh-pressure metamorphism in the forbidden zone: the Xugou garnet peridotite, Sulu terrane, eastern China. Journal of Metamorphic Geology, 21 (6) 539-550 doi:10.1046/j.1525-1314.2003.00462.x | Journal (article/letter/editorial) | | such as the Western Gneiss Region (WGR) of Norway, the Bohemian Massif of central Europe and the Dabie-Sulu...gneisses, and lies within the oxygen isotopic anomaly region. Eclogite and its country rock have very low d18O...uncommon (3–7 vol.%) and is partially replaced by tremolite. Enstatite with well-developed (110) cleavage...Clinopyroxene in peridotite is partially replaced by tremolite with high Mg ⁄ (Mg + Fe) of about 0.96. Omphacite...Xugou peridotite; similar lenses in the Bohemian Massif have been interpreted to represent HP crystal accumulation |
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