 | Masago, H., Rumble, D., Ernst, W. G., Parkinson, C. D., Maruyama, S. (2003) Low delta18O eclogites from the Kokchetav massif, northern Kazakhstan. Journal of Metamorphic Geology, 21 (6) 579-587 doi:10.1046/j.1525-1314.2003.00465.x | Journal (article/letter/editorial) | | 579–587 Low d18O eclogites from the Kokchetav massif, northern Kazakhstan H. MASAGO,1,* D. RUMBLE,2 W. G....silicates in eclogites and whiteschists from the Kokchetav massif were analyzed by whole-grain CO2-laser fluorination...and UHP metamorphism. Key words: eclogite; Kokchetav massif; low d18O; whiteschist. INTRODUCTION Since...1990), the Kokchetav massif has attracted the interest of geoscientists worldwide. Kokchetav metamorphic...features of the complex. The significance of the Kokchetav massif and the much greater depths of burial indicated |  | | Journal (article/letter/editorial) | | from diamond-bearing marble in the Kokchetav massif, northern Kazakhstan IKUO KATAYAMA1,*, MASAHITO OHTA2...of deeply subducted impure marble from the Kokchetav massif, we investigated mineral inclusions in zircon...late-stage overprinting. Consequently, diamond, coesite, diopside, garnet, phlogopite, calcite, dolomite...Dolomite + 2 SiO2 = Diopside + 2 CO2. The relict of coesite inclusions in zircon indicates that prograde P-T...P-T trajectory crossed cut the quartz-coesite transition before the decarbonate reaction. Matrix diopsides |  | | Journal (article/letter/editorial) | | partial melting in the Kumdy-Kol region (Kokchetav Massif, Northern Kazakhstan) Alexey L. Ragozin a,⁎, Juhn...U/Pb Zircon Kokchetav UHP metamorphism partial melting A B S T R A C T The Kokchetav Massif of northern...northern Kazakhstan is the best-known metamorphic diamond locality among numerous ultrahigh-pressure (UHP)...the Kumdy-Kol region was performed to constrain the age of partial melting of the Kokchetav UHP metamorphic...rights reserved. 1. Introduction The discovery of coesite (Chopin, 1984; Smith, 1984) and microdiamonds (Sobolev |  | | 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...pyroxene-carbonate and garnet-pyroxene rocks. Graphite, coesite, clinopyroxene, rutile, titanite, kyanite, K-feldspar...of the metamorphic rocks. Key-words: diamond, Kazakhstan, metamorphism, genesis, carbon. 1. Introduction |  | | Journal (article/letter/editorial) | | (UHPM) terranes (Erzgebirge Massif, Germany; Kokchetav Massif, Northern Kazakhstan; Rhodope Metamorphic Province... Keywords: Diamond, Raman, UHP metamorphism, Kokchetav, Erzgebirge, Rhodope Metamorphic Province introduCtion...localities found to have crustal rocks containing coesite, diamond, or other ultrahigh-pressure (UHP) metamorphic...SiO2 and of carbon, respectively, coesite and diamond. Preserved coesite inclusions (often surrounded by...rarely kyanite) deduced to be pseudomorphs after coesite have been cited as evidence of UHPM conditions |  | | Journal (article/letter/editorial) | | systems from residual pressure patterns. For a coesite–garnet, aragonite–garnet and diamond– garnet system...the inclusions. Key words: aragonite–calcite; coesite–quartz; diamond–graphite; numerical modelling;...highly debatable issue since the discovery of coesite (Chopin, 1984; Smith, 1984) and diamond (Rozen...2001), and primary UHPM minerals (e.g. diamond, coesite, aragonite) survive exclusively as inclusions....authors to account for the presence of residual coesite and diamond in UHPM rocks (Gillet et al., 1984; |  | Korsakov, Andrey V., De Gussem, Kris, Zhukov, Vladimir P., Perraki, Maria, Vandenabeele, Peter, Golovin, Aleksander V. (2010) Aragonite-calcite-dolomite relationships in UHPM polycrystalline carbonate inclusions from the Kokchetav Massif, northern Kazakhstan. European Journal of Mineralogy, 21 (6) 1301-1311 doi:10.1127/0935-1221/2009/0021-1992 | Journal (article/letter/editorial) | | polycrystalline carbonate inclusions from the Kokchetav Massif, northern Kazakhstan ANDREY V. KORSAKOV1,*, KRIS DE GUSSEM2...diamond-grade metamorphic rocks from the Kokchetav Massif, N. Kazakhstan was identified for the first time by...magnesite in diamonds from the UHP Kokchetav Massif, Northern Kazakhstan, identified by TEM with focused...minerals that point to UHPM comprise diamond (C), coesite (SiO2), TiO2 polymorph with a-PbO2 structure. Because...from UHP metamorphic rocks from the Kokchetav Massif, N. Kazakhstan frequently contain diamonds (Korsakov |  | | Journal (article/letter/editorial) | | eclogites from the deep subducted crust in the Kokchetav, Kazakhstan, ultrahigh-pressure metamorphic terrane...returned to the surface. Among these, the Kokchetav massif, Kazakhstan, is considered to be the highest-pressure...the hydroxyl contents of clinopyroxenes in the Kokchetav UHP eclogites using infrared (IR) micro-spectroscopy...micro-spectroscopy. GEOLOGICAL SETTING The Kokchetav massif is situated in the central domain of the composite...collisional events (Dobretsov et al. 1995). This massif is composed of several Precambrian rock series |  | | Journal (article/letter/editorial) | | Diamond-Grade Eclogite from the Kokchetav Massif, Northern Kazakhstan a b c Kazuaki Okamoto , Ikuo...Diamond-Grade Eclogite from the Kokchetav Massif, Northern Kazakhstan, International Geology Review, 48:10...Diamond-Grade Eclogite from the Kokchetav Massif, Northern Kazakhstan KAZUAKI OKAMOTO,1 Institute of Earth...investigated mineral inclusions in zircons from Kokchetav diamond-grade eclogites. In the eclogites, phengite...eclogite from the Kumdy-Kol region of the Kokchetav Massif, northern Kazakhstan, is the best natural sample |  | | Journal (article/letter/editorial) | | origin in crustal rocks of the Kokchetav Massif, northern Kazakhstan, diamonds have been described from...exhumation. In contrast to other UHP terranes, the Kokchetav Massif contains rocks with unusually abundant diamonds...diamonds, particularly in the Kumdy-Kol region. Kumdy-Kol diamonds exhibit diverse morphologies, dependent...by Rozen et al. (1972) from the Kokchetav Massif, northern Kazakhstan, its metamorphic origin was accepted...(1990). Since then, addicontinental collision, Kokchetav tional occurrences have been discovered in the |  | Katayama, Ikuo, Maruyama, Shigenori, Parkinson, Christopher D, Terada, Kentaro, Sano, Yuji (2001) Ion micro-probe U–Pb zircon geochronology of peak and retrograde stages of ultrahigh-pressure metamorphic rocks from the Kokchetav massif, northern Kazakhstan. Earth and Planetary Science Letters, 188 (1) 185-198 doi:10.1016/s0012-821x(01)00319-3 | Journal (article/letter/editorial) | | ultrahigh-pressure metamorphic rocks from the Kokchetav massif, northern Kazakhstan Ikuo Katayama a; *, Shigenori Maruyama...constrain the age and geodynamic significance of the Kokchetav ultrahigh-pressure (UHP) metamorphic rocks, which...Middle Proterozoic supracrustal protoliths of the Kokchetav UHP^HP rocks were subducted to mantle depths in...approximately 5 km/Ma. The rapid exhumation rate for the massif is in the same range as other UHP metamorphic terranes...Keywords: SHRIMP data; probe; U/Pb; zircon; Kokchetav Kazakhstan; mineral inclusions; polym metamorphism |  | | Journal (article/letter/editorial) | | Ž2000. 215–233 www.elsevier.nlrlocaterlithos Coesite inclusions and prograde compositional zonation...garnet in whiteschist of the HP-UHPM Kokchetav massif, Kazakhstan: a record of progressive UHP metamorphism...metamorphic ŽUHPM. belt in the Kulet region of the Kokchetav massif of Kazakhstan. Garnet displays prograde compositional...Qtz-stability field. Silica inclusions Žquartz andror coesite. of various textural types within garnets display...inclusions of polycrystalline quartz pseudomorphs after coesite Žtype 2., with minute dusty micro-inclusions of |  | | Journal (article/letter/editorial) | | infiltration in the Kokchetav ultrahigh-pressure metamorphic rocks, northern Kazakhstan Hideki Masago a,⁎...of the Kokchetav massif, Kazakhstan. The mode and extent of retrograde hydration in the massif are highly...was calculated as 0.1% of the total mass of the massif. This amount of fluid is fully covered by the dehydration...discovery of metamorphic coesite by Smith (1984) and Chopin (1984), coesite and its pseudomorph has been...Dabie-Sulu, China (Wang et al., 1989), the Bohemian massif, Poland (Bakun-Czubarow, 1992), Sulawesi Indonesia |  | ZHANG, R. Y., LIOU, J. G., ERNST, W. G., COLEMAN, R. G., SOBOLEV, N. V., SHATSKY, V. S. (1997) Metamorphic evolution of diamond-bearing and associated rocks from the Kokchetav Massif, northern Kazakhstan. Journal of Metamorphic Geology, 15 (4) 479-496 doi:10.1111/j.1525-1314.1997.00035.x | Journal (article/letter/editorial) | | diamond-bearing and associated rocks from the Kokchetav Massif, northern Kazakhstan R . Y. Z HA N G1 , J . G. L I OU...from Unit II at Kulet, eastern Kokchetav Massif, northern Kazakhstan, were studied. Diamond-bearing gneisses...path. Inclusions of quartz pseudomorphs after coesite were identified in garnet from both eclogite and...words: diamond; eclogite; K-feldspar lamellae; Kokchetav Massif; UHP; whiteschist I N T RO DU C TI O N Diamond...first identified from the Kokchetav Massif in the Caledonides of northern Kazakhstan. Although the discovery |  | | Journal (article/letter/editorial) | | the discovery of these microdiamonds (as well as coesite) triggered a major revision in the understanding...metasedimentary rocks of continental affinities of the Kokchetav massif, Kazhakstan (Rozen and Zorin, 1972), but they...ages of coesite- and diamond-bearing UHPM terranes; SX — Saxothurnigan area of Bohemian Massif) (the figure...containing well-confirmed diamonds. Age in MA Kokchetav massif Kazakhstan (Kumdy-Kol and Barchi-Kol) 531 (UHPM)...Erzgebirge massif, Germany Moldanobian Zone, Bohemian massif, Czech Republic Western Gneiss Region, Norway |  | Dobrzhinetskaya, L. F., Green, H. W., Bozhilov, K. N., Mitchell, T. E., Dickerson, R. M. (2003) Crystallization environment of Kazakhstan microdiamond: evidence from nanometric inclusions and mineral associations. Journal of Metamorphic Geology, 21 (5) 425-437 doi:10.1046/j.1525-1314.2003.00452.x | Journal (article/letter/editorial) | | 21, 425–437 Crystallization environment of Kazakhstan microdiamond: evidence from nanometric inclusions...and zircon from felsic gneiss of the Kokchetav massif, Kazakhstan, have been examined utilizing electron...essentially the same stoichiometry suggests that the Kokchetav diamond crystallized from a fluid containing variable...originate from the mantle. It is concluded that Kokchetav diamond most likely crystallized from a COH-rich...metasediments and mantle components. Key words: COH-fluid; Kazakhstan microdiamond; nanoinclusions; oxides; subduction |  | Katayama, Ikuo, Parkinson, Christopher D., Okamoto, Kazuaki, Nakajima, Youichi, Maruyama, Shigenori (2000) Supersilicic clinopyroxene and silica exsolution in UHPM eclogite and pelitic gneiss from the Kokchetav massif, Kazakhstan. American Mineralogist, 85 (10) 1368-1374 doi:10.2138/am-2000-1004 | Journal (article/letter/editorial) | | eclogite and pelitic gneiss from the Kokchetav massif, Kazakhstan IKUO KATAYAMA,1,* CHRISTOPHER D. PARKINSON...matrix clinopyroxene of eclogite from the Kokchetav massif, Kazakhstan. These rocks are diamond-grade, ultrahigh-pressure...containing 2.6 wt% exsolved quartz from the Munchberg Massif, and derived a Ca-Na pyroxene with 10 mol% of the...from eclogites from the Kumdykol region of the Kokchetav massif, Kazakhstan. The eclogite is intercalated... diamonds have been identified in the Kumdykol region (Sobolev and Shatsky 1990; Katayama et al. 1998) |  | Sobolev, N. V., Schertl, H.-P., Valley, J. W., Page, F. Z., Kita, N. T., Spicuzza, M. J., Neuser, R. D., Logvinova, A. M. (2011) Oxygen isotope variations of garnets and clinopyroxenes in a layered diamondiferous calcsilicate rock from Kokchetav Massif, Kazakhstan: a window into the geochemical nature of deeply subducted UHPM rocks. Contributions to Mineralogy and Petrology, 162 (5) 1079-1092 doi:10.1007/s00410-011-0641-4 | Journal (article/letter/editorial) | | diamondiferous calcsilicate rock from Kokchetav Massif, Kazakhstan: a window into the geochemical nature...diamondiferous biotite gneisses and schists of the Kokchetav Massif. The calcsilicates are characterized by high...cooling. Communicated by J. Hoefs. Keywords Kokchetav Massif Garnet Pyroxene Oxygen isotopes Ultrahigh...Oberlin, OH 44074, USA Introduction The presence of coesite and diamond, associated with Mg-rich garnets and...first evidence of coesite eclogites in the upper mantle came from the discovery of coesite, garnet, and clinopyroxene |  | Yui, Tzen-Fu, Chu, Hao-Tsu, Hwang, Shyh-Lung, Shen, Pouyan, Wu, Tsai-Way, Liou, J.G., Sobolev, Nikolay V. (2010) Geochemistry of garnetiferous Ti–clinohumite rock and talc–kyanite–phengite–almandine schist from the Kokchetav UHP terrane, Kazakhstan: An insight to possible origins of some chemically unusual UHP rocks. Lithos, 118 (1) 131-144 doi:10.1016/j.lithos.2010.04.005 | Journal (article/letter/editorial) | | talc–kyanite–phengite– almandine schist from the Kokchetav UHP terrane, Kazakhstan: An insight to possible origins of...Whiteschist Talc–kyanite–phengite–almandine schist Kokchetav UHP terrane a b s t r a c t Major-element, trace-element...whiteschists) and eclogites from the Kulet area of the Kokchetav ultrahigh-pressure (UHP) terrane, to explore their...Garnetiferous Ti– clinohumite rocks from the Kumdy Kol region are characterized by very high Mg, low Si, Ca,...rights reserved. 1. Introduction The discovery of coesite and diamond as micron-scale inclusions within minerals |  | | 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...indicating the presence or earlier occurrence of coesite and/or diamond. Other ultrahighpressure phases...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 |  | | 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...relations 1. INTRODUCTION After the first discovery of coesite (Chopin, 1984) and microdiamond (Sobolev and Shatsky...nature of marbles comes from the occurrence of coesite (Dabie Shan, China: Wang and Liou, 1991; Pan-African |  | | Journal (article/letter/editorial) | | study of diamond and disordered sp3-carbon in the coesite-bearing Straumen Eclogite Pod, Norway D. C. SMITH1...phengite–kyanite–coesite eclogite sample 62a from the Straumen Eclogite Pod in the Western Gneiss Region (WGR),...all of the estimates of the minimum pressure for coesite-, diamond- or orthopyroxene-bearing eclogite types...INTRODUCTION The diamond story in the Western Gneiss Region (WGR), Norway, began by the confirmation by Raman...(Perraki et al., 2006); and especially the Kokchetav Massif, Kazakhstan (Sobolev & Shatsky, 1990; Dobrzhinetskaya |  | | Journal (article/letter/editorial) | | ultrahigh-pressure pelitic schist in the Kokchetav massif, northern Kazakhstan Hideki Masago a,⁎, Soichi Omori...from the latest Precambrian Kokchetav ultrahigh-pressure massif, Kazakhstan, using compositional zoning...in the outer-core to mantle domains. In the rim region both ilmenite and rutile are present, although...similar to the metamorphic P–T gradient of the Kokchetav massif. This result contrasts markedly with the traditional...geothermal gradient than the metamorphic geotherm of the region. On the other hand, the first evidence for ultrahigh-pressure |  | | 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 |  | | Journal (article/letter/editorial) | | Diamond-Free UHP Dolomitic Marble from the Kokchetav Massif a Yoshihide Ogasawara & Kazumasa Aoki a...DiamondFree UHP Dolomitic Marble from the Kokchetav Massif, International Geology Review, 47:11, 1178-1193...Diamond-Free UHP Dolomitic Marble from the Kokchetav Massif YOSHIHIDE OGASAWARA1 AND KAZUMASA AOKI Department...structure occurs at Kumdy-kol in the Kokchetav Massif, northern Kazakhstan. Three centimeter-scale zones occur...(Sobolev and Shatsky, 1990), the Kokchetav Massif of northern Kazakhstan has been the center of attention |
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