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THE KHRUSTALNAYA MOUNTAIN QUARTZ DEPOSIT AS AN OBJECT OF POLYGENIC AND POLYCHRONIC GENESIS
V. N. Ogorodnikov, Yu. A. Polenov, V. V. Babenko
The Ural State Mining University, Ekaterinburg, Russia
New geological observations and scientific studies confirm the opinion of researchers on the hydrothermal genesis of the Khrustalnaya Mountain deposit. The quartz body of this deposit is a quartz-vein formation of filling associated in time with the formation of Isetian potassium-sodium tonalite-granodiorite series of the Verkh-Isetsky batholith. A closer look at the quartz body of the deposit shows that there is no unusual in its shape. The body shape can be described with a geometric figure as a truncated pyramid, and in cross section, the body shape is a trapezoid. This shape of the quartz body could be formed as a result of subsidence of the granodiorite massif roof through a system of tectonic cracks that created large blocks of wedge-shaped sections in the lower basement and smaller ones in the upper part, which contributed to the subsidence of the blocks during cooling of the magmatic massif and the formation of huge cavities in which quartz filling veins were formed. According to their genesis, the quartz bodies of filling in the Urals belong to plutonogenic hydrothermal formations. Our long-term studies of quartz objects in the Urals suggest that the Silexite term for quartz objects in the piezooptical and vein quartz deposits is not applicable and are found to be unnecessary.
Keywords: vein quartz, Silexite, Khrustalnaya Mountain, quartz filling veins, hydrothermal genesis.
DOI 10.20403/2078-0575-2019-4-105-110