• 자원환경지질
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• 제15권4호
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• pp.177-188
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• 1982

The Chungju and Seosan Groups have been known usually as Precambrian formations in Korea. But their relative and absolute ages have been controvericial problem in relation with other geologic system such as so-called Ogcheon and Yeoncheon Systems in Korea. This study has mainly focused on the corelation of the Chungju Group with the Seosan Group in their stratigraphy, structure, metamorphism, and iron ore deposits. In the process of study, the auther surveyed and reclassified the Chungju and Seosan Groups and corelated with Gyeonggi and Ogch cheon metamorphic belts and got some new data. The Chungju iron-bearing formations showing transtitional relation with the Gyeonggi Gneiss Complex and the Jangamri Formation consisting mainly of pebble bearing calcarious phyllite, should be seperated from the Gyemyeongsan formation which is mainly composed of metavolcanic rocks. The Jangamri Formation and the coaly phyllite, which can be corelated respectively with the Hwaggangri Formation and Changri Formation in Ogcheon Group, are repeated in the Gyemyeonsan and Munjuri Formations with the overturned anticlinal folding(F1). So the Chungju Group which was defined as an indipendant geologic unit from the Ogcheon Group should be limited only on the Chungju iron Formation. The Seosan Group can be classified stratigraphically such as Seosan Formation consisting of iron-bearing quartzite and mica schist, Daesan Formation overlying unconformably on the Seosan Formation and Gyeonggi Gneiss Complex. Taean Formation overlying unconformably on the Daesan Formation should be seperated from Seosan Group. There are many similarity in the stratigrphy, structure, and metamorphic facies between Chungju and Seosan Groups exept the metavolcanic rocks in the Gyemyeongsan and Munjuri Formations and the pebble bearing calcareous phyllite in the Jangamri Formation. The two Groups were deformed with two kinds of differant stages, the first shows $N30^{\circ}-40^{\circ}E$ trend of fold axis, the second $N70^{\circ}-80^{\circ}W$ respectively. The Seosan Formation, which is the lowest formation in Seosan Group and bearing the iron formation, was metamorphosed at 2500 m. y. before. These age is similar with the metamorphic age of Gyeonggi metamorphic belt and with the age of Algoman and Kenoran Orogenies which devide the Precambrian into Archean and Proterozoic Era. So the Seosan Formation, which is included in some migmatitic rocks of Gyeonggi Gneiss Complex, is the oldest formation in Korea and can be corelated with the Anshan Group which bears the oldest iron formation in China. The metamorphic facies of the Precambrian metamorphism in Seosan area is simillar with that of Chungju area, showing high temperature-low pressure amphibolite facies which is corelated with the Gyeonggi metamorphic belt, the oldest metamorphic belt in Korea ($650^{\circ}-680^{\circ}C$, 3.2-4.4 Kb). The high temperature intermediate pressure amphibolite facies in Seosan area with the low temperature-intermediate presure greenschist facies of Taean formation is corelated with that of Ogcheon Group ($590^{\circ}-640^{\circ}$ C, 5.2-6.3 Kb). The Chungju and Seosan iron formations were deposited in Archean, showing geochemical composition of Precambrian iron formations. The Chungju iron formation was mainly formed by the chemical precipitation, on the other hand, the Seosan iron formation was formed by alternated action of chemical and detrital depositions.

• 열린충남
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• 통권39호
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• pp.126-143
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• 2007

This study evaluates the economic impacts of regional festivals and cultural events by utilizing regional input-output models of Seosan and Chungnam, which are derived by using a location-quotient approach. Tourism industry has modest forward and backward linkages with other industries, but its impacts on regional income and employment are much larger than other industries including manufacturing industry. Strong impacts on income and employment seem to provide rational for promoting tourism industry in Seosan and Chungnam. The Seosan Migratory Bird Festival increased city outputs approximately by 3929 million Won, increased employment by 56 people, and increased total income of the province by 774 million Won. All of the economic impacts were mostly concentrated in service related industries,

• 농촌계획
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• 제3권2호
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• pp.25-35
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• 1997

This paper is aimed at investigating environmental indicators and needs based on residents' perception at Seosan city, Chungnam province. The results can be summarized as follows ; 1) On the average, the environmental level perceived by residents at Seosan city lies somewhat above the middle one, three points. 2) The perceived environmental level in rural areas is hither than that in urban and suburban ones, 3) There is a difference in residents'environmental needs between rural and urban areas. 4) It is proposed that a long-term and systematic environmental planning for Seosan city should be established to improve the environmental level.

• 한국농림기상학회:학술대회논문집
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• 한국농림기상학회 2005년도 추계 학술발표논문집
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• pp.78-79
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• 2005

• 한국패류학회지
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• 제28권3호
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• pp.259-267
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• 2012

Due to the oil spill incident in December 2007, every facility of oyster culture was removed in western coast especially in Taean and Seosan. To restore oyster resources in Taean and Seosan, we brought oyster seeds from southern area and monitored their growth. In addition we monitored the culture environment throughout the year, and observed the number of oyster larvae and attached spats on collectors during summer. The factors of water environment were appropriate for oyster culture in both study area. The growth of shell height was larger in Uihang-ri, Taean than Jungwang-ri, Seosan. Spawning was more intensive in a short time in Jungwang-ri, Seosan than Uihang-ri, Taean. The number of oyster larvae and spats of collectors were much more in Jungwang-ri, Seosan than Uihang-ri, Taean. This study showed that transplantation of healthy oyster seeds from southern area can be a way of restoration of oyster resources in western coast. In addition, systematic approaches are necessary by building a better understanding of regional characteristics to restore and enlarge the oyster culture farms in western coast. In summary Uihang-ri, Taean will be appropriate for cultivation farms and Jungwang-ri, Seosan for seedling grounds to increase oyster culture productivity.

• 자원환경지질
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• 제15권1호
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• pp.33-39
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• 1982

The Seosan Group in the Taean peninsular can be divided into Seosan formation and Daesan formation according to its metamorphism and stratigraphy. The Seosan formation is composed of iron bearing quartzite and schist which are strongly metamorphosed and migmatized about 2572 m.y.ago. The Daesan formation is composed mainly of quartzite and crystalline limestone. They were intruded by granite gneiss 2370m.y ago and metamorphosed two or three times before Jurassic Period. The Group is overlain by Taean formation which shows low grade metamorphism. Total three times metamorphic events can be recognized in these areas. First and second metamorphisms are predominent in amphibolite facies, the last metamolphism is mostly greenschist facies.

• 자원환경지질
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• 제22권4호
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• pp.371-379
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• 1989

서산지역의 변성퇴적암류에 대한 변성온도 및 압력 조건이 공존하는 변성광물에 대한 분석결과로부터 측정될 수 있었다. 석류석과 흑운모 지온계 (Ferry and Spear, 1978; Ganguly and Saxena, 1984)를 이용한 온도 측정 결과, 서산층에 서는 $620{\pm}40^{\circ}C$이며, 대산층에서는 $520{\pm}20^{\circ}C$인 것으로 나타났다. 석류석-사장석-$Al_2SiO_5$- 석영 지압계 (Newton and Haselton, 1981; Gangul and Saxena, 1984)을 이용한 압력 측정 결과, 두 층 모두 5-6kb로, 유사한 압력 조건을 보여주고 있다. 이같은 결과는 같은 압력 조건 아래에서 서산층이 대산층보다 상대적으로 높은 온도의 변성작용을 받았음을 제시해 준다. 서산층과 대산층에서 Fe, Mg, Mn 등 주원소에 대한 석류석의 chemical zonation은 서로 다른 양상을 보여 주는데, 아마도 두 층이 다른 열적 변성과정(thermal history)을 받아온 결과인 것같다.

• 한국항만경제학회지
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• 제35권1호
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• pp.19-38
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• 2019

서산 대산항은 중국 주요항만과 최단거리에 위치한 대중국 교역의 최적항만으로 평가받고 있으며 배후지역에 석유화학, 자동차, 전자부품단지 등 산업인프라가 잘 갖추어 있을 뿐 아니라 최근에는 상업항으로서의 기능을 강화하기 위한 항만시설 개발이 진행되고 있기 때문에 해양산업 클러스터 구축을 통한 종합항만으로서의 발전 필요성이 강하게 제기되고 있다. 이에 본 연구에서는 서산 대산항 해양산업 클러스터 구축을 위한 추진 시 선결되어야 하는 과제를 다음과 같이 제시하였다. 첫째, 해양산업 클러스터 지정 요건의 수정이 필요하다. 둘째, 둘째, 해양산업 발전을 위한 중앙 권한의 지방 이양이 요구된다. 셋째, 해양산업 클러스터 구축 관련 지자체(서산시 및 충청남도) 거버넌스 구조 변화가 요구된다. 넷째, 향후 서산 대산항 중장기 발전계획 수립시 상업항으로서의 발전가능성도 함께 검토되어야 할 것이다. 마지막으로 서산 대산항의 해양산업 클러스터 추진을 위한 지역 내 논의와 여론 조성을 위한 협의체 구성이 필요하다.

• 한국항만경제학회지
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• 제36권1호
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• pp.91-104
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• 2020

서산 대산항은 국내 무역항 중 물동량 6위의 항만이며, 항만의 지속적인 성장을 위해 항만 인프라 확장, 정기항로 개발, 해외 마케팅, 항만인센티브제 등을 추진하고 있다. 또한, 중국 위해항으로 운항하는 카페리 정기노선개설을 계획 중인 상황으로 이에 대한 수요분석이 필요한 시점이다. 본 연구는 서산 대산항의 대 중국(위해시)카페리 항로 개설 타당성에 대해 분석하여 효율적인 의사결정을 위한 기초자료로 활용할 수 있는 연구제공을 목표로 한다. 현재 국내에서 중국으로 운항하는 카페리 항로는 인천항, 평택·당진항, 군산항에 개설되어 있으며, 연도별로 약간의 등락은 있으나 증가하는 추세에 있다. 서산 대산항에서 위해시로 가는 카페리 항로가 개설될 시 창출 가능한 물동량을 분석하기 위해서 서산 대산항이 위치한 충청남도 지역으로부터 국내 각 항이 위치한 지역으로의 국내 화물물동량을 분석한 후, 국내 각 항에서 위해시로 카페리를 통해 운송되는 물동량을 파악하여 서산 대산항에서 중국 위해항으로 운송될 수 있는 카페리 물동량을 예측하였다. 그 결과, 2020년 기준 여객 약 76,000명, 화물 약 5만톤 정도의 물동량 창출이 가능할 것으로 분석되었다. 또한, 정책제언으로 카페리 여객 활성화를 위한 전략, 카페리 화물물동량 확보를 위한 전략 및 항만인센티브제도의 도입 방향을 제시하였다.

• Food Science and Biotechnology
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• 제14권1호
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• pp.123-130
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• 2005

Hydrogen-donating capacity, scavenging activity of reactive oxygen including superoxide anion radical and hydrogen peroxide, metal-chelating activity, and reducing power of garlic extracts were investigated. All tested garlic extracts exhibited in vitro antioxidant activities, with Uiseong extract showing highest hydrogen-donating and hydrogen peroxide-scavenging activities, and reducing power, followed by Seosan and Samchek extracts, in proportion to total thiosulfinate contents. Higher scavenging activity of superoxide anion radical was observed in Uiseong than Seosan and Samchek extracts. Metal-chelating activity increased in order of Uiseong < Seosan < Samchek, showing inverse relations to total thiosulfinate content. Garlic extracts of Uiseong and Seosan showed weak prooxidant activities and that of Samchek showed strong antioxidant activity against $Cu^{+2}$-induced human LDL oxidation. Protective effects on peroxyl and hydroxyl radical-induced DNA strand damages were observed in all tested garlic cloves. These results indicate growing conditions of garlic cloves affect total thiosulfinate content and antioxidant activities.