Article
Licensed
Unlicensed
Requires Authentication
Hydrous fluid as the growth media of natural polycrystalline diamond, carbonado: Implication from IR spectra and microtextural observations
-
Hidemi Ishibashi
,
Hiroyuki Kagi
Published/Copyright:
April 2, 2015
Abstract
Carbonado, a variety of natural polycrystalline diamond whose origin remains unknown, differs notably in the properties from common diamonds of mantle origin. In this study, infrared spectroscopic and microscopic analyses were conducted on carbonado from the Central African Republic. Stepwise heating followed by infrared spectroscopic measurements indicated that liquid H2O is enclosed within diamond single crystals in carbonado. Transmission electron microscope observation revealed a negative crystal that is interpreted as a primary fluid inclusion in a diamond single crystal. Observations by field-emission scanning electron microscope and electron backscatter diffraction analysis show an absence of lattice preferred orientation of diamond crystals, {111} growth steps along grain boundaries, and the crystal-size distribution of diamond similar to those of crystals formed in liquid media. In addition, the redox conditions of carbonado formation is inferred to be ~3 log units below the quartz-magnetite-fayalite buffer, which is the prevailing condition in cratonic upper mantle. These lines of evidence suggest that the carbonado crystallized in C-O-H fluid, supporting the hypothesis of a mantle-depth origin of carbonado.
Received: 2012-1-9
Accepted: 2012-4-27
Published Online: 2015-4-2
Published in Print: 2012-8-1
© 2015 by Walter de Gruyter Berlin/Boston
You are currently not able to access this content.
You are currently not able to access this content.
Articles in the same Issue
- Actinides in Geology, Energy, and the Environment. Petrography and geochronology of the Pele Mountain quartz-pebble conglomerate uranium deposit, Elliot Lake District, Canada
- Celadonite in continental flood basalts of the Columbia River Basalt Group
- Thermodynamics of manganese oxides: Effects of particle size and hydration on oxidation-reduction equilibria among hausmannite, bixbyite, and pyrolusite
- Grossular: A crystal-chemical, calorimetric, and thermodynamic study
- Redetermination of high-temperature heat capacity of Mg2SiO4 ringwoodite: Measurement and lattice vibrational model calculation
- Thermal behavior of realgar As4S4, and of arsenolite As2O3 and non-stoichiometric As8S8+x crystals produced from As4S4 melt recrystallization
- Thermodynamics of the magnetite-ulvöspinel (Fe3O4-Fe2TiO4) solid solution
- Raman spectroscopy of (Ca,Mg)MgSi2O6 clinopyroxenes
- In-situ Raman spectroscopic study of sulfur speciation in oxidized magmatic-hydrothermal fluids
- Structural anisotropy and annealing-induced nanoscale atomic rearrangements in metamict titanite
- Hydrous fluid as the growth media of natural polycrystalline diamond, carbonado: Implication from IR spectra and microtextural observations
- Metastable equilibrium in the C-H-O system: Graphite deposition in crustal fluids
- Controlled morphogenesis of amorphous silica and its relevance to biosilicification
- Structural relaxation in tetrahedrally coordinated Co2+ along the gahnite-Co-aluminate spinel solid solution
- Limitations of Fe2+ and Mn2+ site occupancy in tourmaline: Evidence from Fe2+- and Mn2+-rich tourmaline
- Isothermal compression of face-centered cubic iron
- Bonding and structural changes in siderite at high pressure
- Energetics and kinetics of carbonate orientational ordering in vaterite calcium carbonate
- Growth process and crystallographic properties of ammonia-induced vaterite
- Argesite, (NH4)7Bi3Cl16, a new mineral from La Fossa Crater, Vulcano, Aeolian Islands, Italy: A first example of the [Bi2Cl10]4− anion
- Experimental study of mineral equilibria in the system K2O(Li2O)-Al2O3-SiO2-H2O-HF at 300 to 600 °C and 100 MPa with application to natural greisen systems
- Tobelite and NH+4-rich muscovite single crystals from Ordovician Armorican sandstones (Brittany, France): Structure and crystal chemistry
- The enigmatic iron oxyhydroxysulfate nanomineral schwertmannite: Morphology, structure, and composition
- Ferric iron and water incorporation in wadsleyite under hydrous and oxidizing conditions: A XANES, Mössbauer, and SIMS study
- Kircherite, a new mineral of the cancrinite-sodalite group with a 36-layer stacking sequence: Occurrence and crystal structure
- Molecular models of birnessite and related hydrated layered minerals
- Letter: Gold-telluride nanoparticles revealed in arsenic-free pyrite
- Letter: XAS evidence for the stability of polytellurides in hydrothermal fluids up to 599 °C, 800 bar
Keywords for this article
Carbonado;
diamond;
fluid inclusion;
IR spectroscopy;
TEM;
crystal-size distribution
Articles in the same Issue
- Actinides in Geology, Energy, and the Environment. Petrography and geochronology of the Pele Mountain quartz-pebble conglomerate uranium deposit, Elliot Lake District, Canada
- Celadonite in continental flood basalts of the Columbia River Basalt Group
- Thermodynamics of manganese oxides: Effects of particle size and hydration on oxidation-reduction equilibria among hausmannite, bixbyite, and pyrolusite
- Grossular: A crystal-chemical, calorimetric, and thermodynamic study
- Redetermination of high-temperature heat capacity of Mg2SiO4 ringwoodite: Measurement and lattice vibrational model calculation
- Thermal behavior of realgar As4S4, and of arsenolite As2O3 and non-stoichiometric As8S8+x crystals produced from As4S4 melt recrystallization
- Thermodynamics of the magnetite-ulvöspinel (Fe3O4-Fe2TiO4) solid solution
- Raman spectroscopy of (Ca,Mg)MgSi2O6 clinopyroxenes
- In-situ Raman spectroscopic study of sulfur speciation in oxidized magmatic-hydrothermal fluids
- Structural anisotropy and annealing-induced nanoscale atomic rearrangements in metamict titanite
- Hydrous fluid as the growth media of natural polycrystalline diamond, carbonado: Implication from IR spectra and microtextural observations
- Metastable equilibrium in the C-H-O system: Graphite deposition in crustal fluids
- Controlled morphogenesis of amorphous silica and its relevance to biosilicification
- Structural relaxation in tetrahedrally coordinated Co2+ along the gahnite-Co-aluminate spinel solid solution
- Limitations of Fe2+ and Mn2+ site occupancy in tourmaline: Evidence from Fe2+- and Mn2+-rich tourmaline
- Isothermal compression of face-centered cubic iron
- Bonding and structural changes in siderite at high pressure
- Energetics and kinetics of carbonate orientational ordering in vaterite calcium carbonate
- Growth process and crystallographic properties of ammonia-induced vaterite
- Argesite, (NH4)7Bi3Cl16, a new mineral from La Fossa Crater, Vulcano, Aeolian Islands, Italy: A first example of the [Bi2Cl10]4− anion
- Experimental study of mineral equilibria in the system K2O(Li2O)-Al2O3-SiO2-H2O-HF at 300 to 600 °C and 100 MPa with application to natural greisen systems
- Tobelite and NH+4-rich muscovite single crystals from Ordovician Armorican sandstones (Brittany, France): Structure and crystal chemistry
- The enigmatic iron oxyhydroxysulfate nanomineral schwertmannite: Morphology, structure, and composition
- Ferric iron and water incorporation in wadsleyite under hydrous and oxidizing conditions: A XANES, Mössbauer, and SIMS study
- Kircherite, a new mineral of the cancrinite-sodalite group with a 36-layer stacking sequence: Occurrence and crystal structure
- Molecular models of birnessite and related hydrated layered minerals
- Letter: Gold-telluride nanoparticles revealed in arsenic-free pyrite
- Letter: XAS evidence for the stability of polytellurides in hydrothermal fluids up to 599 °C, 800 bar
