DBPapers
DOI: 10.5593/SGEM2015/B11/S1.003

A COMPARISON STUDY OF MICRO- AND NANOMORPHOLOGY OF FINE OCTAHEDRAL DIAMONDS FROM URALS PLACERS AND YAKUTIAN KIMBERLITES, RUSSIA

B. M. Osovetskiy, O. N. Kovin, O. B. Naumova, V. A. Naumov
Tuesday 4 August 2015 by Libadmin2015

References:15th International Multidisciplinary Scientific GeoConference SGEM 2015, www.sgem.org, SGEM2015 Conference Proceedings, ISBN 978-619-7105-31-5 / ISSN 1314-2704, June 18-24, 2015, Book1 Vol. 1, 23-28 pp

ABSTRACT
Investigation of the surface morphology of natural diamonds has a widespread usage for determining of their genesis, transport routes, and searching the source rock location. Despite the longtime study, a source of the Urals placer diamonds has not been discovered. Researchers have been discussing a number of hypothesis concerning the primary source rocks of the Urals placer diamonds including kimberlites, lamproites and tuffisites. Scanning electron microscope observations and microprobe analysis of fine diamonds from the placer deposits of the Urals and Mir kimberlitic pipe (Yakutia) revealed the general differences and similarities in the grains surface structure and impurities. Results of study presented in this article showed a vast variability in the shape, structure, and morphology of the observed crystals. Generally, the Ural’s placer and Yakutian kimberlite diamonds demonstrated the similar morphological properties. This suggests that the diamonds from Urals placers and Yakutian kimberlites have rather the same genesis, and the Urals diamonds originate from the kimberlite-like source rock.

Keywords: Yakutian diamonds, Urals placers, crystal nanomorphology, kimberlite pipe, placer diamonds.

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