Primary geochemical aureoles in U--Mo deposits in acidic volcanic rocks (in Russian)
Uranium-- molybdenum lenticular- stratified hydrothermal deposits are timed at the middle Devon volcanic-sedimentary rock strata and connected with fault disturbances, widely developing at this boundary. The ores are of pure uranium or uranium-- molybdenum. The processes of oxidation, reduction to the formation of leaching-out zones, oxidation, and cementation appear widely in the deposits. The study of the initial geochemical aureoles in the rocks was done by sampllng of well cores, mlne walls, and outcroppings. The samples were analyzed by semiquantitative, approximate-quantitative, spectral, and radiometric methods. The samples of the bearing profiles were verifled by quantitative, spectral, and chemical analysis. The changes of the ore-containing rocks were studied simultaneously. The results of the gamma logging of wells and the surface gamma removal were studied during the construction of the scattering aureoles. For determination of the bonding of element satellites with ore-forming elements correlation analysis in samples of ore and aureoles was used. All positive bonds were explained by the presence of given paragenesis, arising during ore, extruslon, and hypergenic processes and by the admixture of individual elements in the ore-forming minerals. The distribution of elements in the different horizontal slices, characterizing the different positions of the aureoles with reference to the ores and modern surfaces, was studied. On the basis of this study the following conclusions were made: (a) in the upper part of the ores and aureoles the ore-forming elements were bound more diversely than in the lower; (b) in the hypergenesis zone the real composition of the initial geochemical aureoles undergoes changes; (c) in the zone of the emergence of ore-bearing rock in the day surface of the ground the aureoles inherit correlation bonds typical of endogenetic processes. (tr-auth)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-29-000353
- OSTI ID:
- 4425497
- Journal Information:
- Izv. Vyssh. Ucheb. Zaved., Geol. Razved., no. 7, pp. 60-68, Other Information: Orig. Receipt Date: 30-JUN-74; Bib. Info. Source: TTT (Tenn. Tech. Trans.)
- Country of Publication:
- Country unknown/Code not available
- Language:
- Russian
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