Abstract
The geological and tectonic settings of new primary low-grade diamond deposit, the Zarya pipe (Alakit-Markhinsky kimberlite field, Yakutian diamond province, Western Yakutia, Russia), are discussed. Data on the geological structure of the diatreme, mineral composition and kimberlite diamond content is presented. The factors determining the vertical and lateral heterogeneity of the mineral-indicative characteristics of kimberlites, diamond assemblage minerals, and diamonds are considered. It is concluded that diamond quality and grades increase with depth.
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