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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Economic and Environmental Geology
Journal Basic Information
Journal DOI :
The Korean Society of Economic and Environmental Geology
Editor in Chief :
Volume & Issues
Volume 33, Issue 6 - Dec 2000
Volume 33, Issue 5 - Oct 2000
Volume 33, Issue 4 - Aug 2000
Volume 33, Issue 3 - Jun 2000
Volume 33, Issue 2 - Apr 2000
Volume 33, Issue 1 - Feb 2000
Selecting the target year
Geochemical Relationship Between Shore Sediments and Land Geology in Keum River Area, West Coast of Korea
Economic and Environmental Geology, volume 33, issue 6, 2000, Pages 447~467
This study was carried out geochemically and mineralogically to define how Kunsan shore sediments are related to their terrestrial source rocks in the region of Keum River Basin, western Korea. As a whole the chemical composition for major elements, trace elements and rare earth elements analysis from shore sediments and river bed sediments doesn't show the big difference, and especially rare earth elements chondrite normalized patterns are almost same. Heavy minerals of shore sediments are identified as hornblende, epidote, ilmenite, garnet, hematite, magnetite, sphene and rutile. Compared with Taean Area of Seo et al. (1998) and Byeonsan Area of Kwon et al. (1999), Kunsan shore sediments of this study area were origined mostly from Keum River Basin.
Hydrochemistry and Environmental Isotope Studies of the Deep Groundwater in the Munkyeong Area
Economic and Environmental Geology, volume 33, issue 6, 2000, Pages 469~489
The hydrogeochemical and isotopic studies on deep groundwater (below a 550 m depth from the ground surface) in the Munkyeong area, Kyeongbuk province were carried out. Two types of deep groundwater (
-rich groundwater and alkali groundwater) occur together in the Munkywong area.
-rich groundwater (Ca-
type) is characterized by low pH (5.8~6.5) and high TDS (up to 2,682 mg/L.), while alkali groundwater (Na-
type) shows a high pH (9.1~10.4) and relatively low TDS (72~116 mg/L).
-rich water may have evolved by
added at depth during groundwater circulation. This process leads to the dissolution of surrounding rocks and Ca, Na, Mg, K and
concentrations are eniched. The low
atm) of alkali groundwaters seems to result from the dissolution of silicate minerals without a supply of
values and tritium data indicate that two types of deep groundwater were both derived from pre-thermonuclear meteoric water and have evolved through prolonged water-rock interaction. The carbon isotope data show that dissolved carbon in the
-rich water was possibly derived from deep-seated
gas, although further studies are needed. The
values of dissolved sulfate show that sulfate reduction occurred at great depths. The application of various chemical geothermometers on
-rich groundwater shows that the calculated deep reservoir temperature is about 130~
. Based on the geological setting, water chemistry and environmental isotope data, each of the two types of deep groundwater represent distinct hydrologic and hydrogeochemical evolution at depth and their movement is controlled by the local fracture system.
Environmental Isotope Characteristics of
-rich Water in the Kangwon Province
Economic and Environmental Geology, volume 33, issue 6, 2000, Pages 491~504
) studies on
-rich waters in the Kangwon Province were carried out to elucidate the origin, residence time, water-rock interaction and mixing process of their.
data indicate that
-rich waters were derived from the local meteoric water. It also shows that each type of
-rich water has distinct isotopic composition and Na-
type water (-10.8 to -12.1
) is lighter than other type waters. These depleted isotopic values supposedly indicate that, considering the altitude effect of isotope in Korea, the recharge area of Na-
type water can be estimated to be relatively higher in elevation than those of Ca-
type waters. Tritium contents close to zero are observed in the Na-
type water, confirming a long residence time and the possibility of a
inflow into the aquifer at great depth. These isotope data also show that the Ca-
type water has undergone mixing process with surface water during ascending at depth, whereas Na-
type water was less mixed with surface waters. The carbon isotope data (-8.8 to ＋0.8
) indicate that dissolved carbon in the
-rich waters was possibly derived from deep seated
gas. The high
values (up to 38.1
) of dissolved sulfates suggest that sulfate reduction by microbial activity had occurred at depth. Strontium isotopic data (
-rich waters indicate that the chemistry of the
-rich waters is determined by water-rock (granite) interaction.
Physicochemical Heterogeneity of the Supply Water Quality depending on Seasonal Changes in the Taejon Area, Korea
Economic and Environmental Geology, volume 33, issue 6, 2000, Pages 505~517
This study was undertaken to provide a drinking water quality on the basis of physicochemical properties. In this study, the 25 samples of supply waters of the Taejon area were sampled twice (February and August in 1999). Hydrochemistry of the supply water belongs to the
type, whereas the supply water was characterized by the relatively significant enrichment of
ions and heavy metals compared to the original water from the Daecheong lake. Generally, the supply water has a mean values for
of temperature, 6.86 of pH, -12 mV of Eh, 88
/cm of EC and 70.379 mg/l of TDS in February, whereas the waters of the same sites in August are a slightly high temperature (
), TDS (78.069 mg/l) and extremely high EC (442
/cm) value. These values are similar with physicochemical properties of the original lake water depending on the seasonal differences. Results of speciation calculation indicate that potentially toxic ions might exist mainly in the forms of free metal (
) and a small amount of
in the supply water. The water seemed to be in equilibrium with kaolinite field of the normal stability diagrams for the natural water. Based on enrichment parameter of the supply water normalized by original lake water composition, the average value of those parameter can be calculated with nearly 1.00, but the those values for Cu＋Zn possible source of decrepit pipe lines are 126.75 in February and 115.63 in August samples. The parameter values varied with sampling sites, however, do not exceed by chemistry of drinking water standard. Solid compounds remained on the membrane filter papers after filtration are adhered to pale yellow or yellowish brown colored dissolved solids and precipitates, which are coated by 0.02 to 0.35 mm thick per 500 ml with colloidal particles of about 1 to 2
size. The particles are mainly Fe-Cu-Zn compounds and partly detected to Mn and Pb.
The Possibility of Utilizing Stone Powder Sludges as Adsorbents for Heavy Metals
Economic and Environmental Geology, volume 33, issue 6, 2000, Pages 519~524
This study has been performed to evaluate the possibility of utilizing stone powder sludges from stone quarry and manufacturing plant as adsorbents for heavy metals in industrial wastewater. The stone powder sludges from stone quarry (IS-01) have the most effective adsorption capacity (above 95％ of initial concentrations) under the given experimental conditions of reaction times (Pb : 15 min, Cu : 2 hr, Zn : 48 hr), initial acidity of solution (pH>3) and dosage (sludge/liquid ratio : 0.02). The stone powder sludges from manufacturing plant (CW-01) show relatively high adsorption capacity (about 95％ of initial concentrations) only for Pb with a reaction times of 12 hours, initial acidity of solution (pH>3) and dosage (sludge/liquid ratio : 0.02). The stone powder sludges (IS-01) from stone quarry having relatively excellent adsorption capacity under the given experimental conditions show their potential utilization as heavy metal adsorbents.
A Study on the Deep Structure of Yangsan Fault by Electric and Electromagnetic Surveys in Unyang and Bong-gye Areas, Kyeongnam Province, Korea
Economic and Environmental Geology, volume 33, issue 6, 2000, Pages 525~536
Electromagnetic and electric surveys were performed to reveal the deep structure of the Yangsan fault in the Bong-gye and Unyang areas, Kyeongnam Province, Korea. Especially, high-frequency magnetotelluric (HFMT) method of EM survey was mainly employed to study the deep subsurface configuration of Yangsan fault. HFMT survey was performed at 25 points of spacing 50 m, making 1.3 km survey line in Unyang area and 13 points of spacing 50 m, making 0.6 km survey line in Bong-gye area. Two 2-D cross-sections (Unyang and Bong-gye areas) were achieved as results. Electric survey by dipole-dipole array was performed to study the structure of shallow subsurface and compare the results with HFMT surveys. The results of HFMT and electric surveys show that Yangsan fault is a geologic boundary. It is very narrow and steep (about
), and extends to 1~1.5 km depth.
Structural Implications of Gravity Anomalies around Dok Island and its Surrounding Seamounts in the East Sea
Economic and Environmental Geology, volume 33, issue 6, 2000, Pages 537~545
Shipborne gravity data are analyzed to investigate crustal structure under Dok Island and its surrounding seamounts located in border of Ulleung Basin and Oki Bank in the East Sea. Relatively low free-air gravity anomaly compared with the volume of seamounts may be explainable by isostatic compensation. From 1 st to 3rd Dokdo Seamounts, the decrease of free-air and Bouguer gravity anomalies implies the different degree of isostatic compensation, crustal thickness or/and density contrast. 3-D gravity modelling shows that seamounts have the mirror roots for regional Airy isostatic compensation, and from Ulleung Basin to Oki Bank, Moho discontinuity deepens and the density of crust is decreases. The results infer that study area is transitional zone from thin oceanic to thick continental crust. The depth of Moho discontinuity is about 15∼16 km, which may be interpreted as an uplifting of Mantle to shallow depth comparing with other borders of the Ulleung Basin.
Study of Shear Fracture System of Janghung Area by Landslide Location Analysis
Economic and Environmental Geology, volume 33, issue 6, 2000, Pages 547~556
The purpose of this study is to analyze shear fracture system using landslide location occurred 1998 at Janghung area. For the geological implication, foliation was surveyed and analyzed, and location of landslide, geological structure and topography were constructed into spatial database using GIS. With the constructed spatial database, shear fracture system was assessed by the relation analysis between strike and dip of the foliation and aspect and slope of the topography. We compared strike and dip of foliation and aspect and slope of topography and recognized the typical fracture pattern, strike and dip of joint, that coincided with shear fracture system. The result tells us that foliation of gneiss has geometrical relation to joint or fault that leading landslide. GIS was used to analyze vast data efficiently and the result can be used to assess the landslide susceptibility as important factor.
A Study on the Application of GIS for Analysis of Subsidence Hazard
Economic and Environmental Geology, volume 33, issue 6, 2000, Pages 557~563
Subsidence hazard has never been considered seriously until recent yews in Korea, although its socioeconomic impact on Korea becomes more and more enormous. There have been a few studies for the application of GIS analysis technique to the prediction of subsidence hazard. For GIS analysis, several factors, which are represented by coverage, are considered and selected for building a GIS model. Numerical method was used to quantify the importance of each factor in GIS model and the result from numerical modeling using FLAC was compared with that from previous research based on empirical methods. Analysis in 3-D needs more computer resources (i.e. memory). Therefore that in 2.5-D was considered to overcome the problem. Not only maximum vertical subsidence but also maximum horizontal strain and maximum slope have been considered for the assessment of subsidence hazard. The model can be easily modified for the purpose of applications in any subsidence area, especially cavern or abandoned mines under thick soil layer.