Uranium Mining in Virginia Scientific, Technical, Environmental, Human Health and Safety, and Regulatory Aspects of Uranium Mining and Processing in Virginia (2012) / Chapter Skim
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Glossary
Glossary
Pages 300-309
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From page 300... ...
A general term for dark-colored mafic igneous rocks, commonly extrusive but locally intrusive (e.g., as dikes) , composed chiefly of calcic plagioclase and clinopyroxene; the fine-grained equivalent of gabbro.
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From page 301... ...
A fine-grained, cohesive rock with angular fragments that have been produced by the crushing and fracturing of preexisting rocks as a result of mechanical forces in the crust, normally lacking a penetrative foliation or microfabric. Cohort.
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From page 302... ...
Reduction/oxidation potential of a compound is measured under standards conditions against a standard reference half-cell. In biological systems, the standard redox potential is defined at pH 7.0 versus the hydrogen electrode and partial pressure of hydrogen = 1 bar.
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Healthy worker effect. Phenomenon of workers usually exhibiting overall death rates lower than those of the general population due to the fact that the severely ill and disabled are ordinarily excluded from employment.
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From page 304... ...
It is a mineral recovery technique where no mine waste piles or tailings impoundments are created. Intercalated.
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Peralkaline. Said of an igneous rock in which the molecular proportion of aluminum oxide is less than that of sodium and potassium oxides combined.
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From page 306... ...
In older writings, any primary mineralized material too low in tenor to constitute ore but from which ore may be formed through secondary enrichment. As commonly employed today, the rock below the sulfide zone of supergene enrichment; the primary material that cannot be produced at a profit under existing conditions but that may become profitable with techno logical advances or price increases.
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From page 307... ...
A mixture of portland cement, sand (commonly including coarse aggregate) , and water applied by pneumatic pressure through a specially adapted hose and used as a fireproofing agent and as a sealing agent to pre vent weathering of mine timbers and roadways.
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From page 308... ...
Vein. An epigenetic mineral filling of a fault or other fracture in a host rock, in tabular or sheetlike form, often with associated replacement of the host rock; a mineral deposit of this form and origin.
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From page 309... ...
Working level. Any combination of short-lived radon daughters in 1 liter of air that will result in the ultimate emission of 1.3 × 105 MeV of potential alpha particle energy.
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