• journal_title：The Canadian Mineralogist
• Contributor：Paul A. Weber ; Joan E. Thomas ; William M. Skinner ; Roger St.C. Smart
• Publisher：Mineralogical Association of Canada
• Date：2005-
• Format：text/html
• Language：en
• Identifier：10.2113/gscanmin.43.4.1193
• journal_abbrev：Can Mineral
• issn：0008-4476
• volume：43
• issue：4
• firstpage：1193
• section：Articles

An assessment of the net acid–base account following H₂O₂ oxidation of mine rock was established by chemical calculations based on the molar quantity of neutralizing cations (Na, K, Mg, Ca) and acid-generating S released during the Net Acid Generation (NAG) test. These neutralizing cations are derived from both silicates and carbonates; in carbonate-poor samples (ANC_carb < 5 kg H₂SO₄/t), however, the acid-neutralization capacity of silicate may be more important in neutralizing acidity than carbonate ANC. Testing is not recommended for samples that have significant concentrations of non-acid-forming S, non-neutralizing cations or non-acid-forming sulfide minerals, such as galena.