 | | Journal (article/letter/editorial) | | study of diamond and disordered sp3-carbon in the coesite-bearing Straumen Eclogite Pod, Norway D. C. SMITH1...in phengite–kyanite–coesite eclogite sample 62a from the Straumen Eclogite Pod in the Western Gneiss Region...Region (WGR), S.W. Norway. Graphitic carbon is always present with a degree of structural disorder comparable...coexisting diamond due to depressurization by exhumation. Hematite coexists with diamond in C3-1. In...microinclusions, the Raman wavenumber position of the diamond peak varies from point to point, from the ideal |  | | Journal (article/letter/editorial) | | themes discussed during the 9th International Eclogite Conference (Mariánské Lázně, Czech Republic...the International Lithosphere Program. THEME 1: DIAMOND FROM UHPM TERRANES At the beginning of 1980 when...nanoscales. Papers presented at the 9th International Eclogite Conference (Mariánské Lázně, Czech Republic...focused ion beam techniques to study polycrystalline diamond containing nanometric fluid and crystalline inclusions...nanoinclusions showed that the polycrystalline diamond crystallized from a two end-member fluid, with compositions |  | | Journal (article/letter/editorial) | | Coesite in the Straumen kyanite-eclogite pod, Norway David C. Smith Laborntoire de MinPralogie, MusPum...coesite in the Straumen kyanite-eclogite pod in the Western Gneiss Region (WGR),Norway, is described....the first coesite occurrence in Norway (the Grytting dolomite-eclogite pod) there are some significant...An initial coesite-eclogite (sub)facies paragenesis was followed by a quartz-eclogite (sub)faciesparagenesis...(7) of silicate phases known in any Norwegian eclogite: garnet, clinopyroxene, kyanite, quartz, phengite |  | 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) | | 12040 Discovery of diamond in the Tromsø Nappe, Scandinavian Caledonides (N. Norway) ,1 E. J. KROGH...Geology, University of Tromsø, Tromsø, N-9037, Norway 3 Department of Geology and Mineralogy, Graduate...finding of diamond in crustal rocks from the Tromsø Nappe of the North Norwegian Caledonides. Diamond occurs...diameter. The diamond occurs as single grains and as composite diamond + carbonate inclusions. Diamond vibration...(sp2-bonded carbon) indicating partial transformation of diamond to graphite. The calculated peak P–T conditions |  | | Journal (article/letter/editorial) | | Raman study of diamond-based abrasives, and possible artefacts in detecting UHP microdiamond...Steger, Simon, Reissner, Claudia, Raman study of diamond-based abrasives, and possible artefacts in detecting... T ACCEPTED MANUSCRIPT RI P Raman study of diamond-based abrasives, and NU SC possible artefacts... Raman spectral characteristics of a range of diamond-based abrasives (powders and RI P sprays) and...Some abrasives show strong broadening of the main diamond band [FWHM (full SC width at half band-maximum) |  | 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) | | 2015 Available online 3 September 2015 Keywords: Diamond Graphite Metastable graphite Pseudomorphs UHPM...1400–2100 °C have been carried out to investigate the diamond-to-graphite transformation in “dry” and “wet” systems...of original diamond crystals, whereas at 1 atmosphere only the general outline of diamond crystals can...graphite crystallites was observed only on the {111} diamond faces, while randomly oriented graphite crystals...were observed on the {100} and especially {110} diamond faces. In a “wet” system, we were unable to reproduce |  | 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) | | metamorphic Geol., 2015 doi:10.1111/jmg.12130 Diamond in metasedimentary crustal rocks from Pohorje,...Slovenia ABSTRACT We report the first finding of diamond and moissanite in metasedimentary crustal rocks...observations and Raman spectroscopy show that diamond occurs in situ as inclusions in garnet, being heterogeneously...colour. The Raman spectra of the investigated diamond show a sharp, first order peak of sp3-bonded carbon...(sp2-bonded) carbon. Detailed observations show that diamond occurs either as a monomineralic, single-crystal |  | | Journal (article/letter/editorial) | | concordia U/Pb age of 335.8 ± 1.9 Ma. Polycrystalline diamond (10–40 µm) consists of many fine-grained crystals...rare. All measured Raman spectra show an intense diamond band at 1332–1328 cm−1 and have a negative correlation...previously reported diamond band data (1331–1337 cm−1) are compatible with those of diamond inclusions in various...the ideal value (1332 cm−1), and have a broader diamond band (FWHM >3 cm−1) than those of well-ordered...(δ13C, −17 to −27‰) of diamond and occurrences of fluid/melt inclusions in diamond and garnet indicates |  | 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) | | in the Åreskutan gneisses ABSTRACT Metamorphic diamond in crustal rocks provides important information...continental crust. Here we present a new occurrence of diamond within the Seve Nappe Complex of the Scandinavian...Microdiamond is found in-situ as single and composite (diamond + carbonate) inclusions within garnet, in kyanite-bearing...this stage are 830-840 ºC and 4.1-4.2 GPa, in the diamond stability field. The ultrahigh-pressure (UHP) assemblage...interpreted to record post-UHP exhumation of the diamond-bearing rocks. The new discovery of microdiamond |  | | 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...imply Archaean crystallisation at T ≥1500 ◦C • Diamond-field UHPM during prograde subduction destroyed...in garnet from the Almklovdalen peridotite, SW Norway 13 Dirk Spenglera,∗, Herman L. M. van Roermundb |  | | Journal (article/letter/editorial) | | xxx (2014) xxx–xxx www.elsevier.com/locate/gca Diamond formation by carbon saturation in C–O–H fluids during...Alps, Italy) represent the first occurrence of diamond in a low-temperature subduction complex of oceanic...sp2-bonded carbon indicates variable kinetics during diamond precipitation. We suggest that precipitation of...for diamond formation outside the thermodynamic stability field of crystalline graphite. Diamond formation...of C required for the spontaneous nucleation of diamond. The interplay of rock buffered fO2 and the prograde |  | 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) | | Rhodopes: evidence from U–Pb–Th dating of monazite in diamond-bearing gneiss from Chepelare (Bulgaria) , 1...Rhodope metamorphic complex comes from occurrence of diamond in pelitic gneisses, variably overprinted by granulite...use monazite in diamond-bearing gneiss from Chepelare (Bulgaria) to date the diamond-forming UHPM event...event in the Central Rhodopes. The diamond-bearing gneiss comes from a strongly deformed, lithologically...orthogneiss units, known as Arda-I and Arda-II. Diamond, identified by Raman micro-spectroscopy, shows |  | 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) | | A diffusion-less mechanism for the graphite-to-diamond transition under huge pressure has been experimentally...well-shaped single nanocrystals. The after-organic diamond paramorphs are characterized by a well-preserved...carbonado. Key-words: astrobleme; impact diamond; coal; diamond paramorphs; after-coal transformation;...1971; Kurdyumov et al., 2012; Xie et al., 2014). Diamond production under shock pressure is known to be...al., 1991). However, the detailed mechanism of diamond formation from coal is completely unclear. Besides |  | | Journal (article/letter/editorial) | | orthopyroxene exsolved from majoritic garnet, graphitized diamond, exsolution of rutile from garnet and pyroxenes...are predominately graphite, but contain relict diamond, based on Raman spectral analysis (see discussion...distributions from the Western Gneiss Region of Norway (KonradSchmolke et al. 2008), Himalayan majorites...AL.: A NEW ~1.8 GA UHP SITE IN WEST GREENLAND Diamond 1335 cm-1 Graphite D = 1355 cm-1 Garnet background...Hydrogenated diamond ~1420 -1450 cm-1 Graphite G = 1580 cm-1 Carbon coat Garnet (5pt7) Remnant diamond in graphite |  | 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 |  | 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 |  | 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) | | their groundmass. A mineral assemblage composed of diamond, super-reduced [(SuR) moissanite, native Cr] and...October 2018 Accepted 16 February 2019 KEYWORDS Diamond; moissanite; ophiolite; Purang; Tibet CONTACT...the discovery of ultra-high pressure (UHP; i.e. diamond, TiO2 II, coesite pseudomorphs after stishovite...mantle. Among the UHP minerals hosted in ophiolites diamond can provide direct insights into deep upper mantle...that the petrological process(es) controlling diamond formation may vary in several details among different |
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