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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Economic and Environmental Geology
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Journal DOI :
The Korean Society of Economic and Environmental Geology
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Volume & Issues
Volume 40, Issue 6 - Dec 2007
Volume 40, Issue 5 - Oct 2007
Volume 40, Issue 4 - Aug 2007
Volume 40, Issue 3 - Jun 2007
Volume 40, Issue 2 - Apr 2007
Volume 40, Issue 1 - Feb 2007
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Pollution Property of Heavy Metal in Goseong Cu Mine Area, Kyungsangnam-do, Korea
Jung, Chul-Hyun ; Park, Hyun-Ju ; Chung, Il-Hyun ; Na, Choon-Ki ;
Economic and Environmental Geology, volume 40, issue 4, 2007, Pages 347~360
In order to evaluate the degree and extent of heavy metal pollution and the environmental impacts of abandoned Cu mines in Goseong-gun, soils and paddies were collected from the mine area and have been analysed for heavy metal contents. The heavy metal contents were much higher in mountain soils than in paddy soils. Total content of heavy metals decreased in order of Cu>Zn>Pb>As>Cr>Cd in mountain soils whereas Zn>Pb>Cu>Cr>As>Cd in paddy soils. The extractable amount of heavy metals by 0.1/1N HCl decreased in order of Cu>Pb>Zn>As>Cd>Cr in mountain soils whereas Pb>Cu>Zn>As>Cd>Cr in paddy soils. Although the extraction ratios were highly various depending on the sampling site, their average values were in order of Cd(16%)>Pb(10%)>Cu(9%)>As(4.5%)>Zn-Cr(
). The soils investigated were enriched in heavy metals relative to the averages of earth crust as In order of
>Pb>Zn>Cu>Cr. Pollution index calculated from total or extractable heavy metals of soils indicated that the heavy metal pollution was restricted to mountain soils around abandoned Cu mines, especially the Samsan I mine. The metal contents of brown rice showed no significantly contaminated level as follows; As
. From the extraction and dispersion properties of heavy metal with the soil pH (
), it can be deduced the conclusion that the heavy metal pollution is spreading in the study area mainly by the detrital migration of waste ore and gangue minerals rather than the dissolution and circulation of heavy metal.
Sorption Behavior of
in the Geological Materials: Eu as an Optimum Analogue for Fate and Transport of Am Behavior in Subsurface Environment
Lee, Seung-Gu ; Lee, Kil-Yong ; Cho, Soo-Young ; Yoon, Yoon-Yeol ; Kim, Yong-Je ;
Economic and Environmental Geology, volume 40, issue 4, 2007, Pages 361~374
Rare earth elements(REEs) have been used as an useful tool in understanding the various geological processes such as evolution and differentiation in the crust. The REEs also have been used as an analog of actinides for radioactive wastes at the water-rock interactions. Using physicochemical properties of the REEs and actinides, we have shown that Eu is an optimum analogue for understanding the behavior of Am in subsurface environments. Factors affecting sorption behavior of radioactive nuclides in groundwater were investigated by batch experiments. Four nuclides such as
were selected to test our hypothesis, and
were specifically used to compare to the sorption behavior between
and other radioactive nuclides. Four different rock samples and one groundwater were used in the batch experiments where solution pH for all experiments was fixed at 5.5. Our results demonstrate that
show similar sorption behavior whereas
is different in sorption behavior at the mineral-water interface, suggesting that the sorption behavior of
is affected by different rock types. Our results also show that 1) Eu in REEs is optimum analogue of fate and transport of Am in subsurface environments, and 2) mineral compositions such as
and distribution of REEs such as Eu anomaly play key roles in affecting sorption behavior of radioactive nuclides even though physicochemical properties of geological materials such as specific surface area and cation exchange capacity can not be ruled out.
Geochemical Behavior and Occurrence of Surface Oxidized Materials on the Stone Cultural Heritage: Iksan Mireuksaji Stone Pagoda
Lee, Dong-Sik ; Lee, Chan-Hee ; Yang, Hee-Jae ; Choi, Ki-Young ;
Economic and Environmental Geology, volume 40, issue 4, 2007, Pages 375~387
The Iksan Mireuksaji stone pagoda, designated as national treasure No. 11 in Korea, has been in the process of disassembling for reconstruction as part of the cultural heritage conservation program. The pagoda is mainly consisting of granite, which is relatively resistant to weathering. However, it has lost its original rock color due to various contaminants deposited at the surface since it exposed to the atmospheric environment long time. In this research, we categorized the secondary inorganic contaminants into the genetic type, and also quantitatively examined occurrences and types of pollutants in the oxidation area of the pagoda surface in which the area is clearly distinguished by naked eyes. Geochemical behavior of soluble pollutants through reaction experiments are demonstrated, and effective methods of cleaning for the conservation and scientific applicability of the surface cleaner are also studied.
The Variation of Oxygen and Hydrogen Isotopic Composition in Precipitation and Geothermal Waters from the Yuseong Catchment
Moon, Sang-Ho ; Cho, Sung-Hyeon ; Lee, Kwang-Sik ; Yun, Uk ;
Economic and Environmental Geology, volume 40, issue 4, 2007, Pages 389~401
The oxygen and hydrogen isotopic composition in precipitation, groundwater and geothermal water were monitored over four-year period from 2001 to 2004 at the Yuseong catchment, Daejeon. By analyzing the long term rainfall pattern, we found out the drought cycle of 6 or 7 year. We fortunately revealed that the oxygen and hydrogen isotopic composition of rain has progressively changed to heavier isotopic ratios from 2001 to 2004. The weighted mean values of
of rain are calculated to be
, respectively. These isotopic values are much heavier than those of groundwater and geothermal water collected at the same period, which indicates that the rain or snow of the study area would not immediately affect the isotopic composition of groundwater or geothermal water. Comparing with the previous data, the groundwater and geothermal water collected at 1990 and 1992 year has the heaviest isotopic composition and afterwards their isotopic composition has been progressively shifted to the direction of lighter composition field.
Fate and Transport of Cr(VI) Contaminated Groundwater from the Industrial Area in Daejeon
Chon, Chul-Min ; Moon, Sang-Ho ; Ahn, Joo-Sung ; Kim, Yung-Sik ; Won, Jong-Ho ; Ahn, Kyoung-Hwan ;
Economic and Environmental Geology, volume 40, issue 4, 2007, Pages 403~418
The objective of this research was to characterize the fate and transport of Cr(VI) contaminated groundwater in the Daejeon industrial area. Five subsidiary monitoring wells were newly installed and two existing wells were utilized for the investigation and the reduction process of Cr(VI) contaminated groundwater of the Daejeon(Mun-pyeong) national groundwater monitoring station. The Cr(VI) concentrations at the shallow aquifer well of the station were in the range of 3.2-4.5 mg/L indicating continuous contamination. However, Cr was not detected at the deep bedrock well and the other monitoring wells except MPH-1 and 3. The Cr(VI) concentrations of MPH-1 and MPH-3 were below the drinking water guideline value (0.05 mg/L). Therefore, the plume of the Cr(VI) contaminated groundwater was predicted to be confined within the narrow boundary around the station. The soluble/exchangeable Cr(VI) concentrations were below the detection limit in all core and slime samples taken from the five newly installed wells. Although the exact source of contamination was not directly detected in the study area, the spatial Cr(VI) distribution in groundwater and characteristics of the core samples indicated that the source and the dispersion range were confined within the 100 m area from the monitoring station. The contamination might be induced from the unlined landfill of industrial wastes which was observed during the installation of an subsidiary monitoring well. For the evaluation of the natural attenuation of Cr(VI), available reduction capacities of Cr(VI) with an initial concentration of 5 mg/L were measured in soil and aquifer materials. Dark-gray clay layer samples have high capacities of Cr(VI) reduction ranging from 58 to 64%, which is obviously related to organic carbon contents of the samples. The analysis of reduction capacities implied that the soil and aquifer materials controlled the dispersion of Cr(VI) contamination in this area. However, some possibilities of dispersion by the preferential flow cannot be excluded due to the limited numbers of monitoring wells. We suggest the removal of Cr(VI) contaminated groundwater by periodical pumping, and the continuous groundwater quality monitoring for evaluation of the Cr(VI) dispersion should be followed in the study area.
A Toolbox Approach for the Environmental Site Assessment of a Chemical Plant in a Coastal Area
Choi, Seung-Jin ; Woo, Nam-Chil ;
Economic and Environmental Geology, volume 40, issue 4, 2007, Pages 419~443
Recently, the branch-out of foreign companies into domestic markets through M&A and the opened followed by the Free Trade Agreement(FTA) with America have made the environmental site assessments of specific site more necessary. In this study, through case study of conducting actual environmental site assessment by use of a toolbox approach at a large scale of chemical plant with various contaminants located in a coastal area, the problems of guideline of domestic environmental assessment of soil were complemented. And an efficient and economical assessment was achieved. All six steps such as basic investigation, environmental site history survey, sampling and analysis, installation of monitoring wells and hydrogeological survey, and data interpretation were conducted in this study. All results of document survey, geological lineament analysis, field geology survey of surrounding area, geophysical prospecting of the site, hydraulic conductivity, measurement of groundwater flow rate and direction, sampling and analysis at each step were associated and estimated as an integrated tool box approach. As a consequence of this study, toolbox approaches were very useful techniques for contamination level and site characterization of subsurface media. The given conditions to conduct a basic survey for domestic soil environment assessment of site by use of existing documents, as well as interviews with the owner/manager/user of all adjacent properties and thorough review of all practically reviewable records pertaining to the property and surrounding properties within "Guideline for Soil Environment Assessment" radii are very poor. As a result, the application of toolbox approach in the environment site assessment of site is not only more efficient and economical, but also could be very useful assessment to integrate the soil and groundwater contamination.
Installation and Data Analysis of Superconducting Gravimeter in MunGyung, Korea; Preliminary Results
Kim, Tae-Hee ; Neumeyer, Juergen ; Woo, Ik ; Park, Hyuck-Jin ; Kim, Jeong-Woo ;
Economic and Environmental Geology, volume 40, issue 4, 2007, Pages 445~459
Superconducting Gravimeter(SG) was installed and has been successfully operated at MunGyung, Kyungsang province in Korea in March 2005. It was registered as the 21st observatory of the Global Geodynamics Project. Since SG can precisely measure the gravity variations below the 1mHz frequency band, it has the outstanding capability to sense and resolve many different periodic gravity components from each other. From the raw data collected between 18 March 2005 and 21 February 2006 diurnal and semi-diurnal tidal band's residual gravity components were analyzed. During this process, the instrumental noises, air pressure, and ground water corrections were carried out. Values of
were used respectively in the air pressure and groundwater corrections. Hartmann-Wenzel and Whar-Dehant Earth tide models were adopted to compute the residual gravity for Q1, O1, P1, K1, M2, N2, S2, K2 tidal bands. For the ocean loading correction, SCW80, FES952, and FES02 models were used and compared. As a result, FES02 ocean loading model has shown the best match for the data processing at MunGyung SG MunGyung SG gravity was compared with GRACE satellite gravity. The correlation coefficient between the two gravity after groundwater correction was 0.628, which is higher than before ground water correction. To evaluate sensitivity at MunGyung SG gravity statition, the gravity data measured during 2005 Indodesian earthquake was compared with STS-2 broad band seismometer data. The result clearly revealed that the SG could recorded the same period of earthquake with seismometer event and a few after-shock events those were detected by seismometer.
Analysis of Calcite Twins as Indicators of Paleostress History
Park, Young-Seog ; Jang, Bo-An ; Kim, Cheong-Bin ; Kang, Seong-Seung ;
Economic and Environmental Geology, volume 40, issue 4, 2007, Pages 461~471
A temperature of deformation and the state and direction of paleostress at that time when twins in calcite grains had been produced were observed, using analysis of calcite twins as indicators of paleostress history. The study was performed with the target of carbonate rocks distributed randomly small size in the southern area of south Korea. Considering the appearance of twins (thin or thick straight twins with one or two twin sets), average twin strain (1.235-7.453%), thickness (
) and intensity (25.26-41.99 twins/mm) from the results of calculated calcite twins, it is estimated that calcite twins were produced under temperatures lower than approximately
. In the magnitudes and directions of principal strains, the maximum shortening strain axis (
) is approximately N-S direction in the GS-1 area in the southern Gyeongsang Basin as well as in the BS-1 area in the southern Yongnam Massif, whereas E-W direction in the NR-1 area in the southwestern Ogcheon Fold Belt. In case of the maximum extension strain axis (
), it is oriented in NW-SE and NE-SW directions in the GS-1 and BS-1 area, respectively, and in N-S direction in the NR-1 area. That is, it is suggested that the paleostress which produced the calcite twins may be applied at least more than two times in the study area.
Stratigraphy of the Kachi-1 Well, Kunsan Basin, Offshore Western Korea
Ryu, In-Chang ; Kim, Tae-Hoon ;
Economic and Environmental Geology, volume 40, issue 4, 2007, Pages 473~490
Strata of the Kachi-1 well, Kunsan Basin, offshore western Korea, were analyzed by using integrated stratigraphy approach. As a result, five distinct unconformity-bounded units are recognized in the well: Triassic, Late Jurassic-Early Cretaceous, Early Cretaceous, Late Cretaceous, and Middle Miocene units. Each unit represents a tectono-stratigraphic unit that provides time-sliced information on basin-forming tectonics, sedimentation, and basin-modifying tectonics of the Kunsan Basin. In the late Late Jurassic, development of second- or third-order wrench faults along the Tan-Lu fault system probably initiated a series of small-scale strike-slip extensional basins. Continued sinistral movement of these wrench faults until the Late Cretaceous caused a mega-shear in the basin, forming a large-scale pull-apart basin. However, in the Early Tertiary, the Indian Plate began to collide with the Eurasian Plate, forming a mega-suture zone. This orogenic event, namely the Himalayan Orogeny, continued by late Eocene and was probably responsible for initiation of right-lateral motion of the Tan-Lu fault system. The right-lateral strike-slip movement of the Tan-Lu fault caused the tectonic inversion of the Kunsan Basin. Thus, the late Eocene to Oligocene was the main period of severe tectonic modification of the basin. After the Oligocene, the Kunsan Basin has maintained thermal subsidence up to the present with short periods of marine transgressions extending into the land part of the present basin.
A Chemical Study of the Periodic Precipitation Reaction in Natural Rocks
Jun, Sang-Ho ; Han, Mi-Ae ;
Economic and Environmental Geology, volume 40, issue 4, 2007, Pages 491~496
This study conducted a chemical experiment on the Leisegang phenomenon, which is known to be the principle of rhyolite formation, and analyzed the results. Even if the same chemical elements precipitated, the shape of Leisegang rings was different according to the condition of medium and depending on inner electrolyte and outer electrolyte. The experiment used agar, gelatin and mung-bean jelly as media. We prepared 0.01M inner electrolyte containing agar 1%, gelatin 2% and mung-bean jelly 5% and curdled the solution at room temperature for 12 hours and, as a result, we obtained viscosity optimal for experimenting on the diffusion of outer electrolyte, and Leisegang rings appeared clearly according to the characteristic of each chemical element. In
with solubility product(
the intervals of Leisegang rings caused by the reaction of inner electrolyte 0.01M KI and outer electrolyte 25%
were narrow between 0.01cm and 0.12cmm but increased gradually, but in with of
the intervals of Leisegang rings caused by the reaction of inner electrolyte 0.01M KI and outer electrolyte 25%
were between 0.7cm and 0.45cm and decreased gradually. This suggests that, in the chemical formation of Leisegang rings, the interval and size of the rings are correlated with the solubility product of the precipitates.
Preliminary Study for the Tapajos Gold Mine Province, Brazil
Kim, In-Joon ; Lee, Jae-Ho ;
Economic and Environmental Geology, volume 40, issue 4, 2007, Pages 497~501
The Scheme of the Mineral Resources and Investment Opportunity, the Republic of Kazakhstan
Lee, Jae-Ho ; Kim, In-Joon ; Kim, Bok-Chul ;
Economic and Environmental Geology, volume 40, issue 4, 2007, Pages 503~511
Comment on "Recent Research for the Seismic Activities and Crustal Velocity Structure"
Lee, Kie-Hwa ; Yoo, Hyun-Jae ; Song, Seok-Goo ; Cho, Kwang-Hyun ;
Economic and Environmental Geology, volume 40, issue 4, 2007, Pages 513~516