In the basic and ultrabasic rocks of the Gulinsky massif of the Maymecha-Kotui province of the Kondersky massif of the Aldan province in the series of rocks: dunites - olivinites - peridotites - clinopyroxenites - gabbro, the content of rare earth elements increases, and the content of elements of the platinum group decreases. The content of noble metals in ultrabasic rocks correlates well with the content of rare earth elements and poorly with the content of other geochemical groups of elements.

The Magan massif belongs to the Maimecha-Kotui province of alkaline, ultramafic rocks and carbonatites.