 | | Journal (article/letter/editorial) | | disordered sp3-carbon in the coesite-bearing Straumen Eclogite Pod, Norway D. C. SMITH1,2 AND G. GODARD3...zircon in phengite–kyanite–coesite eclogite sample 62a from the Straumen Eclogite Pod in the Western Gneiss...Gneiss Region (WGR), S.W. Norway. Graphitic carbon is always present with a degree of structural disorder...rocks in general. This new locality of diamond at Straumen, the fourth in the WGR but the first in the southwestern...the minimum pressure for coesite-, diamond- or orthopyroxene-bearing eclogite types in the WGR. Key words: |  | | Journal (article/letter/editorial) | | themes discussed during the 9th International Eclogite Conference (Mariánské Lázně, Czech Republic...nanoscales. Papers presented at the 9th International Eclogite Conference (Mariánské Lázně, Czech Republic...graphitized diamond from the Straumen eclogite of Western Gneiss Region (WGR) of Norway, a Palaeozoic UHPM terrane...the same monocrystal. The finding of diamond at Straumen provides a minimum pressure estimate for UHP metamorphism...correspond to the minimal pressure assigned for coesite-, diamond- or orthopyroxene-bearing eclogites. |  | | Journal (article/letter/editorial) | | Coesite in the Straumen kyanite-eclogite pod, Norway David C. Smith Laborntoire de MinPralogie, MusPum...occurrence of coesite in the Straumen kyanite-eclogite pod in the Western Gneiss Region (WGR),Norway, is described...described. Although the microtextures of coesite, and of its partial or complete transformation into quartz...described at the first coesite occurrence in Norway (the Grytting dolomite-eclogite pod) there are some...kyanite. An initial coesite-eclogite (sub)facies paragenesis was followed by a quartz-eclogite (sub)faciesparagenesis |  | Janák, M., Krogh Ravna, E. J., Kullerud, K., Yoshida, K., Milovský, R., Hirajima, T. (2013) Discovery of diamond in the Tromsø Nappe, Scandinavian Caledonides (N. Norway) Journal of Metamorphic Geology, 31 (6) 691-703 doi:10.1111/jmg.12040 | Journal (article/letter/editorial) | | the Tromsø Nappe, Scandinavian Caledonides (N. Norway) ,1 E. J. KROGH RAVNA,2 K. KULLERUD,2 K. YOSHIDA...Geology, University of Tromsø, Tromsø, N-9037, Norway 3 Department of Geology and Mineralogy, Graduate...worldwide, i.e. the Western Gneiss region (WGR) in Norway (Dobrzhinetskaya et al., 1995); China (Xu et al...of the Scandinavian Caledonides in southwestern Norway, provided unequivocal evidence for © 2013 John...of diamond in WGR was reported from an eclogite pod at Straumen, where microdiamond was found as inclusions |  | | Journal (article/letter/editorial) | | Song et al., 2005), the Western Gneiss Region, Norway (Dobrzhinetskaya et al., 1995; Vrijmoed et al....and C5–1) in zircon in an eclogite from the CE Western Gneiss Region, Norway: ―The fact that the diamond...strongly AC downshifted in both microinclusions at Straumen is considered to be especially important in favouring...to UHP metamorphism based on the detection of coesite (e.g. Chopin, 1984; Smith, 1984) appears less disputable...occurrence of microdiamond and quartz (instead of coesite), as for instance in garnet from the Rhodopes (Perraki |  | Janák, M., Froitzheim, N., Yoshida, K., Sasinková, V., Nosko, M., Kobayashi, T., Hirajima, T., Vrabec, M. (2015) Diamond in metasedimentary crustal rocks from Pohorje, Eastern Alps: a window to deep continental subduction. Journal of Metamorphic Geology, 33 (5) 495-512 doi:10.1111/jmg.12130 | Journal (article/letter/editorial) | | metamorphism, together with other mineral indicators like coesite (Chopin, 1984; Smith, 1984). Crystallization from...Cretaceous metamorphism up to greenschist facies, eclogite facies metamorphic rocks of Cretaceous age occur...Fodor et al., 2003; Kirst et al., 2010). Numerous eclogite bodies, partly amphibolitized, occur in the southeastern...Uher et al., 2014). The Late Cretaceous age of eclogite facies metamorphism in the Pohorje nappe is documented...et al., 2009). Similar ages were determined for eclogite facies metamorphism in the Koralpe and Saualpe |  | | Journal (article/letter/editorial) | | Meta-anorthosite and related jotunites, Western Gneiss Region, Norway Spencer J. Cotkin Department of Geological Sciences...in the high-grade Western Gneiss Region (WGR) of Norway, and is adjacent to the 1.52 Ga Flat&et quartz...monzonite (mange&e). The WGR was metamorphosed to eclogite facies during Caledonian tectonism 414 &- 16 Ma...Seljeneset rocks display evidence of retrogression from eclogite through amphibolite facies. Meta-anorthosite consists...Mafic rocks vary from moderately well-preserved eclogite, through varieties containing symplectite, to |  | | Journal (article/letter/editorial) | | pre-conference field excursion of the 10th International Eclogite Conference to the Erzgebirge terrane of the Saxothuringian...mineral equilibria, but UHP index minerals including coesite, diamond, moissanite, and nano-sized grains of...high-grade metamorphic rocks: (a) mica-schist–eclogite INTERNATIONAL GEOLOGY REVIEW N 14 o E 12 o...granulite, and other UHP rocks (garnet peridotite, and eclogite) recovered from boreholes T-7 and T-38 (50°28...grey gneiss unit, and (c) gneiss–eclogite unit. The gneiss–eclogite unit in the core of the Erzgebirge |  | 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) | | the tromsø nappe, Scandinavian caledonides (N. Norway). Journal of Metamorphic Geology 31, 691–703. Katayama...E.D., Kostopoulos, D.K., 2001. Diamond, former coesite and supersilicic garnet in metasedimentary rocks...Ogasawara, Y., Fukasawa, K., Maruyama, S., 2002. Coesite exsolution from supersilicic titanite in UHP marble...Ogasawara, Y., 2000. Petrology of the diamond-grade eclogite in the Kokchetav Massif, northern Kazakhstan....disordered sp3carbon in the coesite-bearing straumen eclogite pod, Norway. Journal of Metamorphic Geology |  | Klonowska, I., Janák, M., Majka, J., Petrík, I., Froitzheim, N., Gee, D. G., Sasinková, V. (2017) Microdiamond on Åreskutan confirms regional UHP metamorphism in the Seve Nappe Complex of the Scandinavian Caledonides. Journal of Metamorphic Geology, 35 (5) 541-564 doi:10.1111/jmg.12244 | Journal (article/letter/editorial) | | surrounded by radial cracks indicating breakdown of coesite. Calculated P-T conditions for this stage are 830-840...rocks, mostly para- and orthogneisses, containing coesite or diamond provide evidence for ultrahigh-pressure...mineral assemblages that do not correspond to the eclogite facies but record lower pressure conditions. Often...garnet formed in quartzofeldspathic rocks under eclogite facies conditions may survive even severe retrogression...mountain belt in the Tromsø Nappe, in northern Norway (Ravna & Roux, 2006; Janák et al., 2012, 2013a) |  | | Journal (article/letter/editorial) | | Smith et al., 2011); the Western Gneiss Region, Norway (Dobrzhinetskaya et al., 1995; van Roermund et...lawsonite–blueschist facies (Combin Zone) and eclogite facies (Zermatt–Saas Zone) Alpine metamorphic...serpentinite; (7) Coesite- eclogite and metasediment (Lago di Cignana Unit); (8) Zermatt–Saas Zone eclogite and metagabbro...after the discovery by Reinecke (1991, 1998) of coesite included in a tourmaline crystal. Peak metamorphic...garnet + omphacite + Na-amphibole + lawsonite + coesite + rutile formed at T = 600 °C and P P 3.2 GPa |  | | Journal (article/letter/editorial) | | High-pressure phengite decomposition in the Weissenstein eclogite, Miinchberger Gneiss Massif, Germany G. Franz...petro- genesis of a sample from the Weissenstein eclogite, Bavaria, Germany, has been investigated. The...evolution of the rock. The main phengitequartz-eclogite mineral equilibration occurred at minimum P=13-17...the Weissenstein eclogite are in the same order of magnitude as those for other eclogite bodies from the...non-essential (kyanite, coesite/ quartz, orthopyroxene, olivine) anhydrous eclogite-facies silicates. Phengitic |  | DesOrmeau, Joel W., Gordon, Stacia M., Kylander-Clark, Andrew R.C., Hacker, Bradley R., Bowring, Samuel A., Schoene, Blair, Samperton, Kyle M. (2015) Insights into (U)HP metamorphism of the Western Gneiss Region, Norway: A high-spatial resolution and high-precision zircon study. Chemical Geology, 414. 138-155 doi:10.1016/j.chemgeo.2015.08.004 | Journal (article/letter/editorial) | | (U)HP metamorphism of the Western Gneiss Region, Norway: A high-spatial resolution and high-precision zircon...(U)HP metamorphism of the Western Gneiss Region, Norway: A high-spatial resolution and high-precision zircon...(U)HP metamorphism of the Western Gneiss Region, Norway: A high-spatial PT resolution and high-precision...spectrometry; AC CE P TE D MA NU SC RI PT Norway; Ultrahigh-pressure metamorphism 2 ACCEPTED...Western Gneiss Region of Norway. Zircons were extracted from a layered eclogite in the SC Saltaneset |  | | Journal (article/letter/editorial) | | MINERALS IN ECLOGITES FROM THE WESTERN GNEISS REGION, NORWAY 1. Petrology of the Oxide Microassemblages M I...minerals in eclogites from the Western Gneiss Region, Norway, 1. Petrology of the oxide microassemblages. In:...from ten different eclogite pods in the Western Gneiss Region of southern Norway have been examined by...ilmenite and rutile, as oxide phases stable in eclogite-facies parageneses in appropriate local bulk-rock...initial eclogite-facies equilibration; (f) further petrological evidence to distinguish the eclogite pods |  | Petrík, I., Janák, M., Froitzheim, N., Georgiev, N., Yoshida, K., Sasinková, V., Konečný, P., Milovská, S. (2016) Triassic to Early Jurassic (c. 200 Ma) UHP metamorphism in the Central Rhodopes: evidence from U-Pb-Th dating of monazite in diamond-bearing gneiss from Chepelare (Bulgaria) Journal of Metamorphic Geology, 34 (3) 265-291 doi:10.1111/jmg.12181 | Journal (article/letter/editorial) | | ultrahigh-pressure metamorphism (UHPM) such as coesite (Chopin, 1984; Smith, 1984). The return of such...UHPM such as inferred quartz pseudomorphs after coesite, rods of silica suggesting the former presence...Thermobarometric evidence for UHPM comes from kyanite eclogite in the Pirin Mts. (Fig. 1), which has preserved...tendency of zircon to dissolve at the amphibolite/eclogite transition before UHPM, and its growth during...rocks in the assemblage with phengite + garnet + coesite + kyanite jadeite (Terry et al., 2000; Krenn |  | Gordon, Stacia M., Whitney, Donna L., Teyssier, Christian, Fossen, Haakon (2013) U–Pb dates and trace-element geochemistry of zircon from migmatite, Western Gneiss Region, Norway: Significance for history of partial melting in continental subduction. Lithos, 170. 35-53 doi:10.1016/j.lithos.2013.02.003 | Journal (article/letter/editorial) | | of zircon from migmatite, Western Gneiss Region, Norway: Significance for history of partial melting in...of Earth Science, University of Bergen, Bergen, Norway a r t i c l e i n f o Article history: Received...online 16 February 2013 Keywords: Partial melting Eclogite U–Pb geochronology Trace elements Western Gneiss...Region (WGR), Norway, is dominated by migmatitic gneiss that contains inclusions of eclogite, some of which...and age relationships between host migmatite and eclogite, we obtained LA–ICP–MS U–Pb dates and trace-element |  | | Journal (article/letter/editorial) | | in garnet from the Almklovdalen peridotite, SW Norway Dirk Spengler, Herman L.M. van Roermund, Franziska...in garnet from the Almklovdalen peridotite, SW Norway, LITHOS, https:// doi.org/10.1016/j.lithos.2019...garnet from the Almklovdalen peri- 3 dotite, SW Norway 4 Dirk Spengler, Herman L. M. van Roermund, Franziska...in garnet from the Almklovdalen peridotite, SW Norway 13 Dirk Spenglera,∗, Herman L. M. van Roermundb...western part of the Western Gneiss Region (WGR), SW Norway. The garnetite 24 sample is a non-deformed clot |  | | Journal (article/letter/editorial) | | Introduction Since the first discovery (Chopin 1984) of coesite in alpine metamorphic rocks, ultrahigh-pressure...distributions from the Western Gneiss Region of Norway (KonradSchmolke et al. 2008), Himalayan majorites...eclogitic rocks from the Western Gneiss Region (Norway) using a separate forward-calculation approach...Garnet peridotite, Otrøy, Western Gneiss Region, Norway (Van Roermund et al. 2000); (5) Yangkou mafic-ultramafic...peridotites, Czech Republic (Vrána 2008); (7) Eclogite xenoliths, Premier Kimberlite (Dludla et al. 2006); |  | Shumilova, Tatyana G., Isaenko, Sergey I., Ulyashev, Vasily V., Kazakov, Valery A., Makeev, Boris A. (2018) After-coal diamonds: an enigmatic type of impact diamonds. European Journal of Mineralogy, 30 (1) 61-76 doi:10.1127/ejm/2018/0030-2715 | Journal (article/letter/editorial) | | of silica polymorphs, including high-pressure coesite and lowpressure post-impact phases, was described...disordered sp3-carbon in the coesite-bearing Straumen Eclogite Pod, Norway. J. metamorphic Geol., 31, 19–33 |  | Xiong, Fahui, Liu, Zhao, Kapsiotis, Argyrios, Yang, Jingsui, Lenaz, Davide, Robinson, Paul T. (2019) Petrogenesis of lherzolites from the Purang ophiolite, Yarlung-Zangbo suture zone, Tibet: origin and significance of ultra-high pressure and other ‘unusual’ minerals in the Neo-Tethyan lithospheric mantle. International Geology Review, 61 (17) 2184-2210 doi:10.1080/00206814.2019.1584771 | Journal (article/letter/editorial) | | ultra-high pressure (UHP; i.e. diamond, TiO2 II, coesite pseudomorphs after stishovite and clinopyroxene...small number of diamond, moissanite, corundum, coesite, nitride, native metal and retrograde wadsleyite...detachment of a dense lithospheric slab undergoing eclogite-facies metamorphism as it is subducted deep into...diamond and sp3-carbon in the coesite-bearing Straumen Eclogite Pod, Norway: Journal of Metamorphic Geology...Komiya, T., Hirose, K., and Maruyama, S., 2009, Coesite and clinopyroxene exsolution lamellae in chromites: |
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