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Table 3

Compositions of five extremely acid mine water samples from the Richmond Mine

ElementConcentration of element in sample, mg/liter
90WA103 34.8°C pH 0.4890WA109 38°C pH −0.790WA110A 42°C pH −2.590WA110C 46°C pH −3.691WA111 28°C —
Aluminum2,2106,6801,4206,470
Antimony4.0162915
Arsenic(III)8.14383274
Arsenic (total)56.4154340850
Barium0.0680.10.2<0.1
Beryllium0.0260.10.2<0.1
Boron1.52.517
Cadmium15.948.3211370
Calcium183330279443
Chromium0.120.750.62.6
Cobalt1.315.55.33.6
Copper2902,3404,7609,800
Iron(II)18,10079,70034,5009,790
Iron (total)20,30086,200111,00016,30068,100
Lead3.63.811.98.3
Magnesium8211,4504372,560
Manganese17.14223119
Molybdenum0.591.04.22.3
Nickel0.662.93.76.3
Potassium2611,17019411.1
Selenium0.422.14.2<2.8
Silicon (as SiO2)1703435
Silver0.160.652.40.70
Sodium25193941644
Strontium0.250.490.90
Sulfur (as SO4)118,000360,000760,000
Thallium0.440.150.391.6
Tin1.61541
Titanium5.91251.0
Vanadium2.9111528
Zinc2,0107,65023,50049,300
Associated mineral(s)MelanteriteRhomboclase, römeriteRhomboclase

A dash indicates no determination was made.