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 /
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-...
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| Format: | Government Document eBook |
| Language: | English |
| Published: |
Reston, Va. :
U.S. Dept. of the Interior, U.S. Geological Survey,
2007.
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| Series: | Scientific investigations report ;
2006-5165. |
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| Online Access: | https://purl.fdlp.gov/GPO/LPS105320 |
| 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. |
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| Item Description: | Title from title screen (viewed on Nov. 10, 2008). Electronic resource. |
| Physical Description: | vii, 49 pages : digital, PDF file. |
| Format: | 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. |
| Bibliography: | Includes bibliographic references (pages 45-49). |