Isotope composition of diamonds containing diamond inclusions
Abstract
Results are presented on the isotope composition of carbon in both the host diamond and their diamond inclusions for several such crystals, including diamonds from the kimberlite pipe Udachnaia from the Daldyn-Alakitsk region of Yakutia. Results obtained for nine diamond crystals and their inclusions showed that the carbon-isotope compositions of the host diamond and the diamond inclusion were different. In some cases the difference could be 2 percent and greater. A mechanism for the formation of such double diamonds is proposed. It implies that the primary diamond crystal is grown from liquid mantle that is moving through the rocks, followed by an additional growth under stable conditions.
- Publication:
-
Geokhimiia
- Pub Date:
- July 1990
- Bibcode:
- 1990Geokh.....1033G
- Keywords:
-
- Carbon Isotopes;
- Chemical Composition;
- Diamonds;
- Crystal Growth;
- Crystal Structure;
- Inclusions