Description |
vii, 49 p. : digital, PDF file |
Series |
Scientific investigations report ; 2006-5165
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System Details |
Mode of access: Internet from the USGS web site. Address as of 11/10/08: http://pubs.usgs.gov/sir/2006/5165/pdf/sir06-5165%5F508.pdf; current access available via PURL. |
Note |
Title from title screen (viewed on Nov. 10, 2008). |
Summary |
The goal of this study is to compare and contrast the leachability of metals and the acidity from individual mine waste-rock piles and natural erosional scars in the study area near Questa, New Mexico. Surficial multi-increment (composite) samples less than 2 millimeters in diameter from five waste-rock piles, nine erosional-scar areas, a less-altered site, and a tailings slurry-pipe sample were analyzed for bulk chemistry and mineralogy and subjected to two back-to-back leaching procedures. The first leaching procedure, the U.S. Geological Survey Field Leach Test (FLT), is a short-duration leach (5-minute shaking and 10-minute settling) and is intended to leach readily soluble materials. The FLT was immediately followed by an 18-hour, end-over-end rotation leaching procedure. Comparison of results from the back-to-back leaching procedures can provide information about reactions that may take place upon migration of leachates through changing geochemical conditions (for example, pH changes), both within the waste-rock and scar materials and away from the source materials. |
Bibliography |
Includes bibliographic references (p. 45-49). |
Subject |
Geochemistry -- New Mexico -- Questa.
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Spoil banks -- Leaching -- New Mexico -- Questa.
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Acid mine drainage -- New Mexico -- Questa.
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Added Author |
Smith, Kathleen S.
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Geological Survey (U.S.)
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Added Title |
Leaching characteristics of composited materials from mine waste-rock piles and naturally altered areas near Questa, New Mexico |
Other Form: |
Questa baseline and pre-mining ground-water quality investigation. 19, Leaching characteristics of composited materials from mine waste-rock piles and naturally altered areas near Questa, New Mexico vii, 49 p. (OCoLC)173480302 |
Gpo Item No. |
0624-B-02 (online) |
Sudoc No. |
I 19.42/4-4:2006-5165 |
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