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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 38, Issue 6 - Dec 2005
Volume 38, Issue 5 - Dec 2005
Volume 38, Issue 4 - Aug 2005
Volume 38, Issue 3 - Jun 2005
Volume 38, Issue 2 - Apr 2005
Volume 38, Issue 1 - Feb 2005
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Three-Dimensional Information Extraction of Discontinuity on Rock Slope by Processing Stereo Digital Images
Lee Dong-Cheon ; Woo Ik ; Choi Jin Ok ;
Economic and Environmental Geology, volume 38, issue 4, 2005, Pages 369~380
This study describes image-based approach for efficient and objective evaluation method of the rock slope stability. Three-dimensional rock slope model was reconstructed by processing stereo digital images. The model provided fundamental information for geospatial analysis of the rock slope. Methods to extract three-dimensional information about discontinuity on the rock slope and to estimate roughness of the rock surfaces were suggested. The results show that stereo digital images have potential to provide information for both quantitative and qualitative analysis of rock slope. In addition, visualization of the results increases efficiency and benefit in evaluating rock slope stability.
Measurement of Ground Subsidence in Mokpo Area from Radar Intrerferometry
Kim Sang-Wan ; Kim Chang-Oh ; Won Joong-Sun ; Kim Jeong Woo ;
Economic and Environmental Geology, volume 38, issue 4, 2005, Pages 381~394
Mokpo city is a coastal city located at the south western coast of the Korean Peninsula. Large regions within Mokpo are subjected to significant subsidence because about
of the city area is a reclaimed land from the sea. Although no confidential quantitative measurements are available up to the present, the subsidence rate is as much as several cm per year. In this study, we aimed to estimate the subsidence rate over Mokpo city by using twenty-six JERS-1 SAR dataset from September 1992 to October 1998. Several tens of differential interferograms were processed from JERS-1 dataset and STRM 3-arc DEM. The results indicate continuous subsidence in Dongmyung-dong, Hadang-dong and Wonsan-dong in city, and the subsidence velocity reach over 4 cm/yr in the most highly sinking area. For facilitating the analysis of time-varying surface change, we also carried out an interferometric SAR time series analysis using permanent scatterer and consequently determined space-time maps of surface deformation at each acquisition time of JERS- 1 SAR.
Exploration and Verification of Submarine Groundwater Discharge on Jeju Island by Remotely Sensed Based Water Quality Analysis
Baek Seung-Gyun ; Park Maeng-Eon ;
Economic and Environmental Geology, volume 38, issue 4, 2005, Pages 395~409
To explore submarine groundwater discharge (SGD) into the coastal zone of Jeju Island, the water quality analysis with seasonal remotely sensed data was carried out. If the groundwater is directly discharged into the ocean, the water quality of coastal zone is influenced. Therefore sea surface temperature (SST), the transparency, and Chlorophyll-a's concentration were analyzed for extracting the anomaly zone related with SGD using Landsat Thematic Mapper (TM) data acquired on April, August, and December. Then the spatial characteristics of springs, which located along the coastal area, were analyzed by CIS data integration based on Fuzzy logic. The integration results were compared with the anomaly zone extracted from Landsat TM data, and it is considered that springs has close relationship with SGD.
Nonferrous Metal Industry of China and Production Trend in 2003
Park Hong-Soo ; Kim You-Dong ;
Economic and Environmental Geology, volume 38, issue 4, 2005, Pages 411~419
The recent rapid economic growth of China has an increasing interest to Korea. China is plentiful of the natural mineral resources and has a huge territory with 1.3 billion people, also has a strong foundation in the mining industry as a mineral process and metallurgical technology. Such strong mining industry of China is attractive to Korea which is getting ready the North East Asia epoch. The growth of big mining groups as Gangseo (Jiangxi) Copper Corporation and Honam Juyawhageo (Hunan Zhuye Torch) Metal Co. Ltd. haul up the rapid economic growth in China.
Exploration for the Carlin-type Gold Deposits and Its Potential to Korea
Park Maeng-Eon ; Sung Kyu-Youl ; Baek Seung-Gyun ; Kim Pil-Geun ; Kang Heung-Suk ; Moon Young-Hwan ;
Economic and Environmental Geology, volume 38, issue 4, 2005, Pages 421~434
Abstract Based onthe characteristics of Carlin-type gold deposit in Nevada district, a potential in Korea is evaluated to the Yemi area where is structurally controlled by folds and trust fault. The fault of high angles are combined with a more permeable rocks such as the Yemi breccia and laminated silty limestone. The pattern of enrichment factors for Tl, Sb, As, Ag, Pb, Zn, Cu, Mo and W of limestones in the southern area are geochemically similar with those reported from the Carlin-type Bold deposit. Moreover, the oxygen and carbon isotopes show a hydrothermal alteration is widely developed in this area. According to the result of geophysical interpretation, stable isotope, alteration mineralogy, geochemical study, and geological structure, this mineralized zone may be extended to the M direction, so a detailed systematic exploration is required to identify this alteration zone.
Hydrogeochemical Characterization of Groundwater in Jeju Island using Principal Component Analysis and Geostatistics
Ko Kyung-Seok ; Kim Yongie ; Koh Dong-Chan ; Lee Kwang-Sik ; Lee Seung-Gu ; Kang Cheol-Hee ; Seong Hyun-Jeong ; Park Won-Bae ;
Economic and Environmental Geology, volume 38, issue 4, 2005, Pages 435~450
The purpose of the study is to analyze the hydrogeochemical characteristics by multivariate statistical method, to interpret the hydrogeochemical processes for the new variables calculated from principal components analysis (PCA), and to infer the groundwater flow and circulation mechanism by applying the geostatistical methods for each element and principal component. Chloride and nitrate are the most influencing components for groundwater quality, and the contents of
increased by the input of agricultural activities show the largest variation. The results of PCA, a multivariate statistical method, show that the first three principal components explain
of the total variance. PC1 indicates the increase of dissolved ions, PC2 is related with the dissolution of carbonate minerals and nitrate contamination, and PC3 shows the effect of cation exchange process and silicate mineral dissolution. From the results of experimental semivariogram, the components of groundwater are divided into two groups: one group includes electrical conductivity (EC), Cl, Na, and
, and the other includes
Ca, and Sr. The results for spatial distribution of groundwater components showed that EC, Cl, and Na increased with approaching the coastal line and nitrate has close relationship with the presence of agricultural land. These components are also correlated with the topographic features reflecting the groundwater recharge effect. The kriging analysis by using principal components shows that PC 1 has the different spatial distribution of Cl, Na, and EC, possibly due to the influence of pH, Ca, Sr, and
for PC1. It was considered that the linear anomaly zone of PC2 in western area was caused by the dissolution of carbonate mineral. Consequently, the application of multivariate and geostatistical methods for groundwater in the study area is very useful for determining the quantitative analysis of water quality data and the characteristics of spatial distribution.
Contamination and Mobility of Toxic Trace Elements in Tailings of Samsanjeil Mine
Yeon Kyu-Hun ; Lee Pyeong-Koo ; Youm Seung-Jun ; Choi Sang-Hoon ;
Economic and Environmental Geology, volume 38, issue 4, 2005, Pages 451~462
In order to examine the extent of environmental contamination at abandoned Samsanjeil Cu mines in Kosung-kun, Kyeongsangnam-do, we have investigated the contaminations and mobility of toxic trace elements from mine wastes including about 280,000 tonnages of tailings by chemical experiments (total extraction, partial extraction by 0.1N HCI and sequential extraction procedure). Total concentrations of trace elements showed that Cu, As, Co, Zn, Pb, and Cd concentrations in tailings were 14.0, 3.6, 3.1, 2.1, 2.1 and 1.6 times greater than those in background soil, respectively. From the proportion of metals bound to the exchangeable and carbonate fractions, the comparative mobility of metals decrease in order of $Zn(29.0\%)>Cu(12.3\%)Pb(9.6\%)>Cd(3.0\%)>As=Co(0.0\%)$. Based on the concentrations, chemical speciations of tailings, waste rock and nearby soil, it was revealed that Cu and Zn were the most possible elements to contaminate the surrounding environment in Samsanjeil mine area. In addition, the tailings had total trace metal concentrations below Dutch guideline values except Cu, and they might not affect adverse impact on environment.
The Sr and Pb Isotopic and Geochemical Properties of the Atmospheric Bulk Deposition of Jeonju, Gunsan, and Namweon Areas
Jeon Seo-Ryeong ; Chung Jae-il ;
Economic and Environmental Geology, volume 38, issue 4, 2005, Pages 463~479
The Sr and Pb isotopic ratios and chemical composition were measured for atmospheric bulk deposition samples collected in the Jeonju, Gunsan and Namweon areas over a period of one year. Acidity of deposition ranged pH
with little higher in dry season, and around pH 5.0 in rainy season. The EC and TDS of rainy season was low showing dilution effect, and increased during dry season. Sulfate
are atmospheric aerosols largely of anthropogenic origin in winter. Sodium was concentrated in winter deposition, Ca was concentrated in spring to summer deposition. Namweon has lower EC and TDS than those of other, and Jeonju has higher. Namweon was concentrated in
and Cunsan was concentrated in Cl. Aluminium, Cu, and Zn show good correlation index with TDS, indicating of their origin atmospheric.
ratios of bulk deposition ranged from 0.7109 to 0.7128. The isotopic variations are correlated with mixing of isotopic compositions of local soils, road deposit and biogenic aerosol. In order to constrain further the origin of aerosols in rainwater, it will be necessary to collect additional Sr isotopic data for aerosols. Lead isotope ratios for all areas were similar and belonged to Pb isotope ratios of Seoul's aerosols, but little different with Beijing's aerosols. It showing that Pb in the Korea mainly derived from the gasoline combustion, not exclusively from the Beijing.
Geochemical Study on Geological Groups of Stream Sediments in the Gwangju Area
Kim, Jong-Kyun ; Park, Yeung-Seog ;
Economic and Environmental Geology, volume 38, issue 4, 2005, Pages 481~492
The purpose of this study is to determine geochemical characteristics for stream sediments in the Gwangju area. We collect the stream sediments samples by wet sieving along the primary channels and dry these samples slowly in the laboratory and grind to under 200mesh using an alumina mortar fur chemical analysis. Major elements, trace and rare earth elements are determined by XRF, ICP-AES and NAA analysis methods. For geochemical characteristics on geological groups of stream sediments, we separate geologic groups which are derived from Precambrian granite gneiss area, Jurassic granite area and Cretaceous Hwasun andesite area. Contents range of major elements for stream sediments in the Gwangju area are
According to the AMF diagram for stream sediments and rocks, the stream sediments are plotted on boundary of tholeiitic series and calk alkaline series, which shows that contents of
are higher in stream sediments than rocks. According to variation diagram of
stream sediments are plotted on subalkaline series. Contents range of trace and rare earth elements for stream sediments in the Gwangiu area are Ba
ppm and Yb
The Metallogenic Province of the Russian Far East
Lee Jae-Ho ;
Economic and Environmental Geology, volume 38, issue 4, 2005, Pages 493~497