Authors:
Attila Demény Institute for Geochemical Research, Hungarian Academy of Sciences, Budapest, Hungary
H-1112, Budapest, Budaörsi út 45, Hungary, gnagy@geochem.hu, bajnoczi@geochem.hu, ntibi@geochem.hu

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Géza Nagy Institute for Geochemical Research, Hungarian Academy of Sciences, Budapest, Hungary
H-1112, Budapest, Budaörsi út 45, Hungary, gnagy@geochem.hu, bajnoczi@geochem.hu, ntibi@geochem.hu

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Bernadett Bajnóczi Institute for Geochemical Research, Hungarian Academy of Sciences, Budapest, Hungary
H-1112, Budapest, Budaörsi út 45, Hungary, gnagy@geochem.hu, bajnoczi@geochem.hu, ntibi@geochem.hu

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Tibor Németh Institute for Geochemical Research, Hungarian Academy of Sciences, Budapest, Hungary
H-1112, Budapest, Budaörsi út 45, Hungary, gnagy@geochem.hu, bajnoczi@geochem.hu, ntibi@geochem.hu

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József Garai Department of Mechanical and Materials Engineering, International University, Miami, USA
Miami, FL, 33199, USA, jozsef.garai@fiu.edu, vdrozd@gmail.com

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Vadym Drozd CeSMEC, Florida International University, Miami, USA
Miami, FL, 33199, USA, jozsef.garai@fiu.edu, vdrozd@gmail.com

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Ernst Hegner Dept. für Geo- und Umweltwissenschaften, Ludwig-Maximilians Universität, München, Germany
Luisenstr. 37, D-80333, München, Germany, hegner@lmu.de

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Abstract

In this study we report the first hydrogen isotope composition analyses on carbonado diamond along with cathodoluminescence and scanning electron microscopic imaging, electron microprobe analyses, and stable (H and C) and radiogenic (Sr) isotope measurements. The hydrogen of bulk carbonado (consisting diamond and pore-filling minerals) yielded ∼ −4‰, consistent with usual crustal or mantle-derived fluids. The diamond-related hydrogen component is about 70 ± 30 ppm and shows a D-depletion down to −200‰. Determined H isotope values — together with C isotope compositions — overlap the ranges for mantle-derived hydrocarbons. Textural characteristics and Sr isotope ratios of pore-filling florencite indicate that the carbonado was formed in a fluid-rich environment, underwent a significant high-temperature influence and finally suffered thorough alteration. Based on these observations, a terrestrial formation during interaction of mantle rocks/melts or subducted crustal materials and reduced C-H fluids seems to be more plausible than an extraterrestrial origin.

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Senior editors

Editor(s)-in-Chief: Attila DEMÉNY

Deputy Editor(s)-in-Chief: Béla RAUCSIK

Co-ordinating Editor(s): Gábor SCHMIEDL

Editorial Board

  • Zsolt BENKÓ (Geochemistry, Ar dating; Institute for Nuclear Research, Debrecen)
  • Szabolcs HARANGI (Petrology, geochemistry, volcanology; Eötvös Loránd University, Budapest)
  • Anette GÖTZ (Sedimentology; Landesamt für Bergbau, Energie und Geologie, Hannover)
  • János HAAS (Regional Geology and Sedimentology; Eötvös Loránd University, Budapest)
  • István Gábor HATVANI (Geomathematics; Institute for Geological and Geochemical Research, Budapest)
  • Henry M. LIEBERMAN (Language Editor; Salt Lake City)
  • János KOVÁCS (Quaternary geology; University of Pécs)
  • Szilvia KÖVÉR (Sedimentology; Eötvös Loránd University, Budapest)
  • Tivadar M. TÓTH (Mineralogy; Petrology    University of Szeged)
  • Stephen J. MOJZSIS (Petrology, geochemistry and planetology; University of Colorado Boulder)
  • Norbert NÉMETH (Structural geology; University of Miskolc)
  • Attila ŐSI (Paleontology; Eötvös Loránd University, Budapest)
  • József PÁLFY (Fossils and Stratigraphic Records; Eötvös Loránd University, Budapest)
  • György POGÁCSÁS (Petroleum Geology; Eötvös Loránd University, Budapest)
  • Krisztina SEBE (Tectonics, sedimentology, geomorphology University of Pécs)
  • Ioan SEGHEDY (Petrology and geochemistry; Institute of Geodynamics, Bucharest)
  • Lóránd SILYE (Paleontology; Babeș-Bolyai University, Cluj-Napoca)
  • Ákos TÖRÖK (Applied and Environmental Earth Sciences; Budapest University of Technology and Economics, Budapest)
  • Norbert ZAJZON (Petrology and geochemistry; University of Miskolc)
  • Ferenc MOLNÁR (ore geology, geochemistry, geochronology, archaeometry; Geological Survey of Finland, Espoo)

Advisory Board

Due to the changes in editorial functions, the Advisory Board has been terminated. The participation of former Advisory Board members is highly appreciated and gratefully thanked.

CENTRAL EUROPEAN GEOLOGY
Institute for Geochemical Research
Hungarian Academy of Sciences
Address: Budaörsi út 45. H-1112 Budapest, Hungary
Phone: (06 1) 309 2681
Phone/fax: (06 1) 319 3137
E-mail: demeny@geochem.hu

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Central European Geology
Language English
Size Vol 1-63: B5
Vol 64- : A4
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2007 (1952)
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Founder Magyar Tudományos Akadémia  
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