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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

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