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 |
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Source Agency |
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NTIS Subject Category |
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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 |