Modern single-crystal X-ray analysis of minerals still encapsulated in diamond not only permits the determination of both the chemical composition of inclusions and of the residual internal pressures [1], but also provides a three dimensional analysis of the crystallographic relationships between inclusions and diamond hosts. Although the syngenicity of inclusions in diamonds is generally assumed on the basis of strong morphological criteria, the crystallographic relationships between inclusions and their host are rarely determined and a systematic survey of them for the different mineral species is lacking. We will present results of an ongoing single-crystal X-ray diffraction study of olivines included in diamonds from the Udachnaya kimberlite (Russia). Implications on the syngenetic or protogenetic nature of the inclusions will be discussed.
Crystallographic relationships between diamond and its olivine inclusions.
NESTOLA, FABRIZIO;NIMIS, PAOLO;
2011
Abstract
Modern single-crystal X-ray analysis of minerals still encapsulated in diamond not only permits the determination of both the chemical composition of inclusions and of the residual internal pressures [1], but also provides a three dimensional analysis of the crystallographic relationships between inclusions and diamond hosts. Although the syngenicity of inclusions in diamonds is generally assumed on the basis of strong morphological criteria, the crystallographic relationships between inclusions and their host are rarely determined and a systematic survey of them for the different mineral species is lacking. We will present results of an ongoing single-crystal X-ray diffraction study of olivines included in diamonds from the Udachnaya kimberlite (Russia). Implications on the syngenetic or protogenetic nature of the inclusions will be discussed.Pubblicazioni consigliate
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