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Reactivity in the South Spoils and Hillside Dump at the Midnite Mine.


PB96172606

Publication Date 1996
Personal Author Moore, B. W.; Price, J. W.; Gardner, T.
Page Count 230
Abstract The Midnite Mine is an interactive open-pit uranium mine located on the Spokane Indian Reservation in Washington State. Drill samples from two large waste rock dumps on the site, known as South Spoils and Hillside Dump, were collected with a Becker hammer drill and evaluated to determine potential of the rock to generate acid mine drainage (AMD). Waste rock at this mine contains both pyrite and uranium, and AMD effects are more complicated on this site than most in that uranium is soluble in both acidic and neutral aqueous solutions. Considerable calcite exists in the South Spoils, and weathering feldspars further contribute to acid neutralization. The Hillside Dump has low concentrations of pyrite and calcite that acid-base accounting protocols would predict to be non-acidic.
Keywords
  • Uranium mines
  • Acid drainage
  • Rock-fluid interactions
  • Spoil
  • Tailings
  • Sampling
  • Chemical analysis
  • Pyrite
  • Uranium isotopes
  • Silicates
  • Chemical reactions
  • Radionuclide migration
  • Acid neutralizing capacity
  • Neutralization
  • Solubility
  • Metals
  • Drilling
  • Abandoned sites
  • Midnite Mine
  • Waste rock interactions
  • Stevens County(Washington)
Source Agency
  • Bureau of Mines
NTIS Subject Category
  • 68D - Water Pollution & Control
  • 48A - Mineral Industries
  • 99F - Physical & Theoretical Chemistry
Corporate Authors Bureau of Mines, Salt Lake City, UT. Salt Lake City Research Center.
Document Type Technical Report
Title Note Rept. of investigations/1996.
NTIS Issue Number 199615
Reactivity in the South Spoils and Hillside Dump at the Midnite Mine.
Reactivity in the South Spoils and Hillside Dump at the Midnite Mine.
PB96172606

  • Uranium mines
  • Acid drainage
  • Rock-fluid interactions
  • Spoil
  • Tailings
  • Sampling
  • Chemical analysis
  • Pyrite
  • Uranium isotopes
  • Silicates
  • Chemical reactions
  • Radionuclide migration
  • Acid neutralizing capacity
  • Neutralization
  • Solubility
  • Metals
  • Drilling
  • Abandoned sites
  • Midnite Mine
  • Waste rock interactions
  • Stevens County(Washington)
  • Bureau of Mines
  • 68D - Water Pollution & Control
  • 48A - Mineral Industries
  • 99F - Physical & Theoretical Chemistry
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