The Ayat gold and cinnabar deposit
Abstract
The described deposit is located in the Yekaterinburg District of Perm Province, in the northeast corner of block 109 of the Ayat Dacha of the Verkh-Isetsk District. The vein rock, of igneous origin, cutting through the thickness of the host rocks like dikes, is a rock of porphyritic structure, sometimes with a clear composition. The phenocrysts are large grains of albite, varying in size from No. 0 to No. 4. The groundmass consists of small crystals, usually elongated in the direction of flow, of the same albite, quartz, and small grains of orthoclase that cannot be optically investigated and are only detected by chemical analysis. Inclusions of apatite crystals, pyrite, and occasionally tourmaline and stibnite are observed almost everywhere. Based on the work carried out to date, the deposit as it currently appears has no commercial significance, but it must be kept in mind that many very essential aspects of it have not yet been clarified.
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References
- K. I. Bogdanovich. Ore Deposits, Vol. II, pp. 102–108. (in Russian)
- V. Nikitin. Geological Research of the Central Group of Dachas of the Verkh-Isetsk Factories, the Revda Dacha, and the Murzinsky Area. Page 279. (in Russian)
- Becker. Quicksilver Deposits of the Pacific Slope. U. S. G. XIII. 1888. pp. 17, 18.
- Becker. Quicksilver Deposits of the Pacific Slope. U. S. G. Surv. XIII. 1888. p. 36.