• Proceedings of the KSEEG Conference
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• 1999.04a
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• pp.21-23
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• 1999

• The Journal of the Petrological Society of Korea
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• v.21 no.2
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• pp.113-128
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• 2012

The chemical composition of the continental crust play an important role in understanding of crustal formation and evolution and quantifying other processes taking place within continental crust. We summarized geochemical data reported in the previous literature for the crustal rocks in the Korean Peninsula and divided their chemical composition into geologic time scale. In the variation diagram normalized by average composition of the upper crustal rocks, the geochemical characteristics of the upper crust during Triassic period is different from those of the upper crustal rocks after Jurassic period or before Precambrian. However, the geochemical characteristics of the Jurassic and Precambrian period are similar each other. Our summarized data indicate that the source material of Triassic upper crust may be different from that of Jurassic or Precambrian upper crust.

• Proceedings of the KSEEG Conference
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• 2001.04a
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• pp.49-52
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• 2001

• Economic and Environmental Geology
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• v.37 no.1
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• pp.35-48
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• 2004

This paper provides a comprehensive overview of geochemical approaches for investigating and assessing heavy metal contamination in abandoned mine sites. Major sources of contaminants at the abandoned mine sites are mine water, waste rocks, tailings, and chemicals used in beneficiation and mineral processing. Soil, sediment, surface and ground water, and ecological system can be contaminated by heavy metals, which are transported due to erosion of mine waste piles, discharge of acid mine drainage and processed water, and dispersion of dust from waste rocks and tailings. The abandoned mine sites should be characterized using various methods including chemical analysis, mineralogical analysis, acid generation prediction tests, leaching/extraction tests, and field tests. Potential and practical environmental impacts from the abandoned mines should be assessed based on the site characterization.

• Economic and Environmental Geology
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• v.34 no.2
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• pp.175-192
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• 2001

We have collected hydrogeochemical data of shallow groundwaters in the Uljin area located at eastern coastal area of Korea. Geostatistical analysis (ANOVA test, cluster analysis, and factor analysis) of the collected data sets was pert'onned, in order to evaluate both the spatial and/or temporal variation of water quality data and the groundwater contamination, as weJl as the principal reactions occurring in the aquifer. Results of the ANOVA test show that regional water chemistry are not significantly changed spatially in eight watersheds. However, some ions such as $Ca^{2+}$, $HCO_{3}^{-}$ and $SO_{4}^{2-}$ show a meaningful watershed variation. Water chemistry variation according to sampling time (season) is not shown, except for $SO_{4}^{2-}$. The cluster analysis shows that significant water chemistry variation is eXplained by the distance from the coast. Factor analysis indicates that the water chemistry is changed according to various factors as follows: in the order of decreasing importance, water-rock interaction (mainly, carbonate dissolution), sea-salt spraying, and then contamination by fertilizers and agrochemicals.

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 2004.09a
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• pp.410-412
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• 2004

한반도남부에 분포하는 중생대의 화강암류는 경기육괴지역을 중심으로 분포하는 쥬라기의 대보화강암류와 옥천대 이남지역에 주로 분포하는 백악기의 불국사 화강암류로 크게 분류할 수가 있다. 우리나라의 4$0^{\circ}C$ 이상의 고온성 온천수는, 이암층으로 덮여있는 포항지역을 제외하고는 대부분이 상기의 화강암류 지역에 분포하는 특성을 지닌다. 이 논문에서는 우리나라의 고온성 온천수의 지구화학적특성, 특히 희토류원소의 분포특성을 화강암류의 분포지역과 비교하여 고찰해보고자 하였다. 화학분석에 이용된 온천수 시료는 2004년도 2월의 건기에 채취되었다. 이 연구결과에 의하면, 아산온천(구 온양온천), 덕산온천, 포천지구 및 속초지구와 같이 쥬라기 대보화강암류지역에 주로 분포하는 온천수는 PAAS(Post-Archean Australian Shale)로 규격화하였을 경우 경희토류(La-Sm)이 결핍되어 있고, 중희토류는 편평한 분포양상을 보여주었다. 그리고 Eu의 이상(anomaly)이 거의 존재하지 않으며, Ce의 경우 부(-)의 이상 (Ce netative anomaly)을 보여주기도 한다. 반면에 옥천대 이남에 분포하는 백암, 덕구, 부곡, 마금산, 동래, 해운대, 포항지구의 온천수들은 전반적으로 편평한 분포특성을 보여준다. 그리고 대체적으로 Eu 과 Ce의 강한 정(+)의 이상을 보여준다. 이와 같은 Eu과 Ce의 이상은 온천수와 대수층간의 반응에 따른 결과로서 사료된다.

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 2000.11a
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• pp.221-224
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• 2000

• Proceedings of the KSEEG Conference
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• 2001.04a
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• pp.396-399
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• 2001

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2010.10a
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• pp.183-184
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• 2010

• Journal of the Korean earth science society
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• v.23 no.7
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• pp.617-617
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• 2002