Composition of Volatiles Captured by Diamonds during Growth in the Metal–Carbon–Silicate System at High Pressure and High Temperature

The paper addresses a fluid phase conserved in inclusions in diamond, which were synthesized in the metal–carbon system in the presence of silicate material at 5.5 GPa and 1500°C. Natural olivine and alkaline basaltic glass were used as silicate material. It was found that the diamonds contain 130 d...

Full description

Saved in:
Bibliographic Details
Published in:Geochemistry international 2021-09, Vol.59 (9), p.840-850
Main Authors: Tomilenko, A. A., Chepurov, A. A., Sonin, V. M., Bul’bak, T. A., Logvinova, A. M., Zhimulev, E. I., Timina, T. Yu, Chepurov, A. I.
Format: Article
Language:English
Subjects:
Aliphatic hydrocarbons
Alkanes
Analysis
Carbon
Composition
Crystallization
Diamonds
Earth and Environmental Science
Earth Sciences
Fluid inclusions
Geochemistry
Heavy metals
High pressure
High temperature
Hydrocarbons
Liquids
Metals
Olivine
Saturated hydrocarbons
Silicates
Volatile compounds
Volatiles
Volcanic glass
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The paper addresses a fluid phase conserved in inclusions in diamond, which were synthesized in the metal–carbon system in the presence of silicate material at 5.5 GPa and 1500°C. Natural olivine and alkaline basaltic glass were used as silicate material. It was found that the diamonds contain 130 different volatile compounds dominated by medium (С 5 –С 12 ) and heavy (С 13 –С 18 ) aliphatic hydrocarbons, which correspond to the presence of a highly reducing fluid in the crystallization medium. The comparison of obtained data with composition of fluid inclusions, which were found in natural diamonds and contain significant amount of medium and heavy aliphatic hydrocarbons of the С 5 –С 18 series, indicates that some natural diamonds could be formed in highly reducing mantle conditions in the presence of metal liquids.
ISSN:0016-7029
1556-1968
DOI:10.1134/S0016702921080085