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Environmental Health - Toxic Substances


U.S. Geological Survey Toxic Substances Hydrology Program--Proceedings of the Technical Meeting, Colorado Springs, Colorado, September 20-24, 1993, Water-Resources Investigations Report 94-4015

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Alteration of Alluvium by Acidic Ground Water Resulting from Copper Mining at Pinal Creek, Arizona


Carol J. Lind (U.S. Geological Survey, Menlo Park, Calif.) and Kenneth G. Stollenwerk (U.S. Geological Survey, Denver, Colo.)


A composited core of alluvium collected downgradient from a metal-rich, acidic ground-water plume was eluted with ground water from the plume in a column experiment.

The major minerals present in the alluvium before and after elution were identified, and resulting changes in mineral content and in ground-water composition were correlated. Of the 12 identified minerals, the ground water dissolved two carbonate minerals and pyrolusite and partially dissolved the feldspars.

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