MEND Project 1.14.2b

March 1994 (revised September 1997)

ABSTRACT

Acid drainage from the South Dump of Mine Doyon in Quebec was first noted in 1985, and levels of contaminants continued to increase through 1988. Although the South Dump does not have a high sulphide content (3-5%) it is estimated that 50% of the waste rock dump is composed of highly reactive sericitic schists. An exhaustive monitoring program was initiated in the summer of 1990, and has included analysis of leachate coming from below and around the dump. The chemical data generated are described in the report.

The report is a compilation of all chemical and mineralogical data from the South Dump of Mine Doyon which have been gathered and analyzed to date. The data is organized in five sections: chemical analyses of sampled leachate; a discussion of water quality in the unsaturated zone; mass balance calculations based on chemical data; chemical composition calculations based on common physical parameters; and data obtained prior to 1991. The parameters measured and discussed herein include: flow measurements; total dissolved solids; effluent density; conductivity; pH; acidity; sulphate; iron; and a wide range of associated metals.

 

Last Modified: 2003-11-26		Important Notices

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