• The Journal of the Korea Contents Association
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• v.7 no.4
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• pp.123-132
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• 2007

This study explored the characteristics of media contents in the past, present and future. Also, it investigated the problems in terms of production of contents and circulation in order to find an effective way of providing contents that can keep pace with ubiquitous environment as well as one source multi use in various platforms and channels. In conclusion, it is viewed easy to expect that content would be the most valuable assets in ubiquitous media environments and the importance of contents will be more growing. Rather than game and enjoyment-related contents, more informative and cultural programs will be more valuable so policy-makers as well as industry need to more cultivate this area. In addition, this study presented the method for copyright protection and suggested that governmental policy fostering independent production should also be followed.

• Economic and Environmental Geology
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• v.38 no.6 s.175
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• pp.633-642
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• 2005

We present the sedimentary sequence and distribution pattern of the late Holocene muddy deposits in the northern East China Sea shelf using the high-resolution 'Chirp' profiles. The seismic sedimentary sequence overlying acoustic basement (basal reflector-B) can be divided into two depositional units (Unit 1 and 2) bounded by erosional bounding surface (mid reflector-M). The lower Unit 1 above basal reflector-H is characterized by the acoustically parallel to subparallel reflections and channel-fill facies. The upper Unit 2, up to 7 m in thickness, shows seismically semi-transparent seismic facies and lenticular body form. On the base of sequence stratigraphic concept, these two sediment units have developed during transgression and highstand period, respectively, since the last sea-level lowstand. The transgressive systems tract (Unit 1) lie directly on the sequence boundary (reflector B) that have farmed during the last glacial maximum. The transgressive systems tract in this study consists mostly of complex of delta, fluvial, and tidal deposits within the incised valley estuary system. The maximum flooding surface (reflector M) corresponding to the top surface of transgressive systems tract is obviously characterized by erosional depression. The highstand systems tract (Unit 2) above maximum flooding surface is made up of the mud patch filled with the erosional depression. The high-stand mud deposits showing a circle shape just like a typhoon symbol locates about 140 km off the south of Cheju Island with water depth of $60\~90m$. Coverage area and total sediment volume of the mud deposits are about $3,200km^2$ and $10.7\times10^9\;m^3$, respectively. The origin of the mud patch is interpreted as a result of accumulating suspended sediments derived from the paleo-Yellow and/or Yangtze Rivers. The circular distribution pattern of the mud patch appears to be largely controlled by the presence of cyclonic eddy in the northern East China Sea.

• Economic and Environmental Geology
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• v.34 no.5
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• pp.437-446
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• 2001

Zoned epidotes formed by the propylitic alteration of the Bobae sericite deposit in western Pusan show complex compositional zoning patterns, such as multiple growth zoning, oscillatory zoning, patchy zoning and irregular zoning. The complex zoned epidote, in general, shows AI-rich cores and Fe-rich rims. Pistacite component (Ps) in the epidote ranges from 18.5 to 74.3 mot.%. Remnant textures in multiple growth zoning indicate that the earlier zone was partially resorbed prior to growth of later one. Multiple growth zoning and oscillatory zoning suggest that hydrothermal system underwent rapid changes and fluctuations in fluid chemistry, redox condition, or temperature.

• Economic and Environmental Geology
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• v.40 no.3 s.184
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• pp.319-330
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• 2007

The Muposan Tuff is a stratigraphic unit which is distinguished as a cooling unit in the volcanic rocks of the northeastern Kyeongsang Basin. The Muposan Tuff commonly belongs to tuff field according to the granulometric classification and to vitric tuffs according to the constituent classification. The tuffs are mostly densely to partially welded to include very flattened and sometimes stretched pumices and shards, and involve several flow indicator and lateral gradings in maximum diameter and content of their constituents. Movement pattern from flow lineation, lithic and pumice imbrications, asymmetric flow folds, and lateral gradings in maximum diameter and content of their constituents indicate that the Muposan Tuff had a source from the southeastern part.

• Economic and Environmental Geology
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• v.41 no.5
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• pp.625-633
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• 2008

Uses of nickel have been widened in 20th century thanks to development of steel industry and munitions industry and also the demand from each uses on nickel has grown rapidly. In recent 5 years, the market price of nickel has been in bull market, so the security of supply became a big issue for each nickel user. However the entire material flow of nickel is not completed yet in Korea and not even in advanced countries, so recycling rate of nickel from raw materials to finished goods is not sufficient. Although statistical data and report systems about nickel are unprepared in domestic market, this study is carried out with limited market data for the completed material flow of nickel in domestic market and establishing recycling policies of nickel.

• Economic and Environmental Geology
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• v.31 no.5
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• pp.431-446
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• 1998

The calcretes from the Cretaceous Gyeongsang Supergroup in the vicinity of Ulsan city have been examined at five sites (Daedong, Seodong, Ansachon, Deogha, and Mangyangri). In these calcretes, evidences indicating pedogenic origin are recognized. Included are calcite aureoles around detrital grains, pedotubular pores, microstromatactis, circumgranular cracks, fitted structure of adjacent peloids, calcrete ooids, rhizocretions, and calcrete intraclasts. On the basis of calcrete development together with lithofacies, the depositional environments of those deposits are interpreted as lake margin (Daedong deposits), braided to low-sinuosity river (Seodong deposits), braid plain (Ansachon deposits), and meandering river (Deogha and Mangyangri). Stratigraphically, the fluvial deposits of study area show paleoenvironmental change from braided to low-sinuosity river plain under arid climatic condition to meandering river plain under seasonally wet an dry climatic condition. The stratigraphic successions of the Gyeongsang Supergroup of the study area Qacustrine-fluvial-Iacustrine) together with paleoenvironmental change of fluvial deposits suggest that those deposits can be correlated with the Banyaweol-Songnaedong-Geoncheonri formations of the Gyeongsang Supergroup in the western part of the Yangsan Fault.

• Proceedings of the KSEEG Conference
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• 2002.10a
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• pp.17-30
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• 2002

삼척-도계지역 일대에 분포하는 조선누층군의 풍촌층 석회석은 품위 및 암상에따라 상부고품위대와 하부석회암대로 분대가 가능한데, 이는 삼척-태백간을 북북동으로 흐르는 오십천을 경계로 서쪽에 분포하는 풍촌층과 비교할 때 다소간의 암상차이를 보인다. 즉, 풍촌층의 특징중에 하나인 중부백운암대가 본 역 일대에서는 백운암화가 미약하여 비교적 소폭으로 확인되며, 상부백색대 역시, 발달정도가 미약한 특징을 보인다. 시추탐사결과 확인된 삼척-도계지역의 풍촌층 상부고품위대는 일반적으로 상부백색대($\pm$15m) - 백운암대($\pm$15m) - 암회색대($\pm$50m)로 구분되는 것으로 나타났다. 각각의 품위는 상부백색대 : CaO 53.4~55.6%, 백운암대 : MgO 3.0~l8.4%, 암회색대 : CaO 50.4~54.2%로 나타나 제철용으로의 사용이 가능하나 백운암대에 대한 선별채광이 부분적으로 요망된다. 이들 석회석은 오십천대단층의 수반단층인 수조의 NNE계열 정단층들에 의해 빈번히 단절되어 있으며 일부지역에서는 EW향의 역단층에 의해 규제되기도 한다. 상기 제단층들은 석회암층을 단절시킬 뿐만아니라 단층각력, 단층점토, 암맥 등의 불순대를 수반하므로 개발에 장애요소가 되고 있다. 상부고품위대 부존표고는 지역에 따라 다소 차이가 있으나 200ML 내외에서 대부분 확인이 가능하며 지표노출 규모는 작은 편이나 $10^{\circ}$이하의 완경사로 화절층 하부에 부존되어 있어 갱도 채광에 적합한 형태를 이루고 있다.

• Proceedings of the KSEEG Conference
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• 2002.10a
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• pp.1-15
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• 2002

조사지역에는 고생대 캠브리아기의 장산규암층, 묘봉층, 풍촌층, 화절층 및 오도비스기의 동점층, 두무동층, 막동층, 그리고 이들과 부정합 관계인 중생대 쥬라기의 사평리 역암이 분포한다. 위의 지층들은 북동-남서방향으로 발달하는 두 개 조의 드러스트 단층과 이에 수반된 후향 드러스트 단층 및 습곡구조에 의해 분포가 지배된다 이들 지층 중 경제 지층인 풍촌층은 암상의 특성에 따라 하부석회암대, 중부백운암대, 상부석회암대(고품위대)로 세분되며, 이 중 상부석회암대가 고품위용으로 개발대상이 된다. 상부석회암대는 백색-유백색의 치밀질 괴상석회암, 담회색 괴상 석회암, 어란상 석회암 등으로 구성되는데, 평균품위는 SiO$_2$ 0.40%, A1$_2$O$_3$ 0.15%, Fe$_2$O$_3$ 0.15%, CaO 54.2%, MgO 1.07%, 백색도 85.7로 중탄용이나 생석회 및 소석회 등 화학공업용으로 사용가능한 범위를 보여준다. 고품위대의 두께는 평균 약 40m이나 드러스트 단층 등의 구조요소에 의해 2～3회 반복되어 분포하기도 하고 지역에 따라 두께가 80～90m까지 두꺼워지기도 한다 상부석회암대의 석회석을 중탄용, 소성용, 탈황용 등으로 개발을 위해서는 사전에 충분한 정밀시추탐사를 시행하여 그 부존규모 및 개발가능구간 확인이 선행되어야 한다.

• Economic and Environmental Geology
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• v.37 no.3
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• pp.325-334
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• 2004

Detail downward variation records for paleomagnetic, XRD, photospectrogram, TOC results were obtained from the soil developed along the Hantan River, Gungpyeong-ri, Cheongsan-myeon, Yeoncheon-gun Gyeonggi-do. The unconsoildated sediments underlain by the Jeongok Quaternary Basalt indicates that the paleosol formed twice with different ages, as apparently indicated by sedimentological, paleomagnatic, and soil chemical properties. The paleosols recorded paleoclimate and paleoenvironments of about 271.21$\pm$89.8 ka before eruption of the Quaternary Jeongok Basalt.

• Economic and Environmental Geology
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• v.41 no.4
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• pp.465-468
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• 2008

Two half circular structures are developed in the northern and southern blocks which divided by the WNW-trending lineament around Uiryeong-Haman area, southern part of the Gyeongsang basin. By displacing one half circular structure to the other one about 750 m, a perfect circular structure is reconstructed. Thus the WNW-trending lineament is a left-lateral fault displacing the circular structure. The NNW trending ridges are dragged with anticlockwise sense near the WNW-trending fault, which indicates also the existence of a sinistral movement.