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Variations in Geochemical characteristics of the Acid Mine Drainages due to Mineral-Water Interactions in Donghae Mine Area in Taebaek, Korea  

김정진 (서울대학교 지구환경과학부)
김수진 (서울대학교 지구환경과학부)
Publication Information
Economic and Environmental Geology / v.35, no.1, 2002 , pp. 55-66 More about this Journal
Abstract
There are several abandoned coal mines around Donghae mine area in the Taebaek coal field. Two major creeks, Soro and Sanae, are contaminated with the colored precipitates formed from the coal mine drainages. Bed rocks of the study area consist of limestone, shale, and sandstone. Limestone consisted mainly of calcite and dolomite, and shale of quartz, pyropyllite and chlorite, and sandstone of quatz and illite. Coal coal spoil dumps composed mainly of pyrite and chlorite. The oxidative dissolution of sulfide minerals leads to acid mine drainage and adds the metal ions in the stream water. The ion concentrations of Fe, Ca, Mg, Al, Si, SO$_{4}$in the stream polluted by AMD are generally higher than those in the unpolluted stream water. High concentrations of Ca and Mg, Al and Si can be resulted from dissolution of carbonate minerals such as calcite, dolomite and aluminosilicates such as chlorite, pyrophyllite. Although the Fe, Al, Si, SO$_{4}$ contents are considerbly high in the acid water released from the mine adits, they become decreased downstream due to dilution of unpolluted water and precipitation of oxide/hydroxide and sulfate minerals on the bottom of stream.
Keywords
coal mines; pyrite; AMD; aluminosilicates; oxide/hydroxide;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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