Role of pH changes in primary uraninite mineralization
Uranyl minerals form a distinct series based on their solubilities in environments of different pH, beginning with the molybdenates, and proceeding through the arsenates, phosphates, vanadates, and silicates of the soddyite groups. Unlike exogenetic-epigenetic uranium deposits with pitchblende, infiltrational deposits with uranyl mineralization are primarily the result of changes in the pH of the environment. The model presented gives the precipitation of uranyl vanadates at an acidic geochemical barrier, and it can be used to explain the genesis of carnotite deposits in calcretes. A geochemically opposite model for the formation of uranyl minerals as the result of the neutralization of interstitial waters that have been strongly acidified (to pH 2) in conjunction with the oxidation of sulfide-bearing rocks must be adopted to explain the distribution and conditions of the formation of the uraninite deposits in black shales. (JMT)
- Research Organization:
- USSR Ministry of Geology, Minge
- OSTI ID:
- 6463514
- Journal Information:
- Int. Geol. Rev.; (United States), Vol. 24:10
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
URANIUM DEPOSITS
GEOCHEMISTRY
MINERALIZATION
BLACK SHALES
CARNOTITE
ORIGIN
PH VALUE
PITCHBLENDE
URANYL PHOSPHATES
ACTINIDE COMPOUNDS
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
CHATTANOOGA FORMATION
CHEMISTRY
ENERGY SOURCES
FOSSIL FUELS
FUELS
GEOLOGIC DEPOSITS
GEOLOGIC FORMATIONS
MATERIALS
MINERAL RESOURCES
MINERALS
OIL SHALES
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
RADIOACTIVE MATERIALS
RADIOACTIVE MINERALS
RESOURCES
TRANSITION ELEMENT COMPOUNDS
URANINITES
URANIUM COMPOUNDS
URANIUM MINERALS
URANIUM VANADATES
URANYL COMPOUNDS
VANADATES
VANADIUM COMPOUNDS
050100* - Nuclear Fuels- Reserves
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