Crystallization of diamond from a silicate melt of kimberlite composition in high-pressure and high-temperature experiments

Journal Article · Mon Nov 01 00:00:00 EST 1993 · Geology; (United States)

DOI:https://doi.org/10.1130/0091-7613(1993)021<0968:CODFAS>2.3.CO;2· OSTI ID:5653862

Arima, Makoto; Nakayama, Kazuhiro ^[1]; Akaishi, Minoru; Yamaoka, Shinobu; Kanda, Hisao ^[2]

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1. Yokohama National Univ. (Japan)
2. National Inst. for Research in Inorganic Materials, Ibaraki (Japan)

In high-pressure and high-temperature experiments (1800-2200[degrees]C and 7.0-7.7 GPa), diamond crystallized and grew in a volatile-rich silicate melt of kimberlite composition. This diamond has well-developed [111] faces, and its morphologic characteristics resemble those of natural diamond but differ from those of synthetic diamond grown from metallic solvent-catalysts. The kimberlite melt has a strong solvent-catalytic effect on diamond formation, supporting the view that some natural diamonds crystallized from volatile-rich melts in the upper mantle. 19 refs., 3 figs., 1 tab.

• OSTI ID: 5653862
• Journal Information: Geology; (United States), Vol. 21:11; ISSN 0091-7613
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
58 GEOSCIENCES
DIAMONDS
CRYSTALLIZATION
CATALYSIS
EXPERIMENTAL DATA
GRAPHITE
HIGH PRESSURE
KIMBERLITES
MICROSCOPY
RAMAN SPECTROSCOPY
SILICATES
TEMPERATURE RANGE 0400-1000 K
X-RAY DIFFRACTION
CARBON
COHERENT SCATTERING
DATA
DIFFRACTION
ELEMENTAL MINERALS
ELEMENTS
IGNEOUS ROCKS
INFORMATION
LAMPROPHYRES
LASER SPECTROSCOPY
MINERALS
NONMETALS
NUMERICAL DATA
OXYGEN COMPOUNDS
PERIDOTITES
PHASE TRANSFORMATIONS
PLUTONIC ROCKS
ROCKS
SCATTERING
SILICON COMPOUNDS
SPECTROSCOPY
TEMPERATURE RANGE
VOLCANIC ROCKS
360601* - Other Materials- Preparation &amp; Manufacture
400201 - Chemical &amp; Physicochemical Properties
580000 - Geosciences