HR: 1340h
AN: H23B-1430    [Abstracts]
TI: The 3-dimentional Distribution through Physical-Chemical-Mineralogical Characteristics of Subsurface Heterogeneity in Tailings of Guryoung Mine, Korea
AU: * Moon, Y
EM: yhmoon@yonsei.ac.kr
AF: YonseiUniversity, Department of Earth System science 134 Shinchon-dong Sodaemoon-gu, Seoul, 120-749 Korea, Republic of
AU: Park, E
EM: egpark@knu.ac.kr
AU: Song, Y
EM: yungoo@yonsei.ac.kr
AF: YonseiUniversity, Department of Earth System science 134 Shinchon-dong Sodaemoon-gu, Seoul, 120-749 Korea, Republic of
AU: Moon, H
EM: hsmoon@yonsei.ac.kr
AF: YonseiUniversity, Department of Earth System science 134 Shinchon-dong Sodaemoon-gu, Seoul, 120-749 Korea, Republic of
AB: To build an efficient way of handling potential risk associated with a closed mining site with abandoned waste rock and finely crushed mill tailing, detailed characterization on the site is crucial. Among the items to be characterized, mineral characteristics, particle distribution and surface/groundwater flow relationship, shape existence of heavy metal and discriminating the sulfide mineral oxidation and second minerals formation due to the rain or surface water environment may reveal very important aspects of the contaminated site such as kinds and level of contamination, contaminant generation in the event of precipitations, contaminant reaction/transport in the vadose zone, etc. Guryoung mine site in Korea, which is consistent with the purpose of this research, was selected as a research area. In order to illustrate and describe a geological heterogeneity, three-dimensional Coupled Markov chain (CMC) was used. The sampling site was constructed as elemental data using GPS. The sample­_s analytic data of physical-chemical-mineralogical aspects and cation exchange capacity were built as the database. The result is following: In oxidation zone (0.43 to 1.00 m), the particle contained more than 10 percent of clayey due to the weathering, and the pH was below 3 by oxidation of pyrite. The presence of jarosite, gypsum and goethite was confirmed. The cation exchange capacity was analyzed greater than 10 meq per 100 mg. In transition zone, sandy contained greater percentage, and its pH was 3 to 5. Metals and heavy metals extracted using 0.1 N HCl had the highest concentration, and pyrite took the greatest percentage. In primary zone, sandy contained the greatest percentage at the top but silt took over as going down. The pH was neutral, 5 to 8. Also calcite was identified as second mineral due to the reduction of primary zone. These results were built as database, and applying CMC, the three-dimensional distribution of tailing was confirmed.
DE: 1813 Eco-hydrology
SC: Hydrology [H]
MN: Fall Meeting 2005