한국남해(韓國南海)의 지질구조(地質構造)에 관(關)한 지구물리학적(地球物理學的) 연구(硏究)

조규장,신병우,Cho, Kyu Jang,Shin, Byung Woo 대한자원환경지질학회 1981 자원환경지질 Vol.14 No.2

An airborne magnetometer survey was carried out over an offshore area of about $200,000km^2$ from the southeastern, southern and western part of Korea. Detailed magnetic studies on the geological structure of the southern part of above area ($100,000km^2$) was accomplished. Residual aeromagnetic map was made in order to delineate magnetic provinces, magnetic lineaments and sedimentary basins by application of least square method using computer system. To determine the depth of the sedimentary basins pseudo-gravimetric method was applied. 1. The area studied is divided into four magnetic provinces for the purpose of interpretation on the basis of the magnetic maps. 2. Near shore area and its attached islands of southern part (fiirst and second magnetic province) can be regarded as being the extension from the land geology due to presentation of strong magnetic anomalies and shallow magnetic basements. 3. Magnetic lineament 1-1 is strong magnetic anomalous region which is presumably relevant to volcanic activities in Cretaceous. The depth of magnetic basement of the lineament was determined to 1,500 m. Negative magnetic anomalous zones B1-1 and B1-2 which represent Tertiary basins showed depth of magnetic basement 3 km and 4 km each. The latter can be interpreted as extension of the Taiwan basin which is consisted of Tertiary sediments. 4. Magnetic lineament 2-1 coincide with Rainan-Fukien massif running NE-SW direction. A lineament located in central part of magnetic lineament 2-1 is well connected with extension of Sobacksan anticlinal axis on land. Volcanic rocks in Gyongsang system concentrated along this lineament. 5. The characteristics of magnetic pattern in the southern Yellow sea basin of western part of Jeju island show weaker magnetic anomalies and deeper magnetic basements than first and second magnetic provinces indicating geological structure of this basin seems to be quite different from that of Jeju strait. 6. In southern part of Jeju island, smoother magnetic pattern develope southward. Maximum depth of magnetic basement in sedimentary basins BIV-1 and BIV-2 were determined down to 6,000 m increasing its thickness toward Taiwan up to 11,000 m in the shelf area off Taichung, Taiwan. Judging from the fact that hydrocarbon was founded in the Tertiary sediments of western coastal area of Taiwan, it can be expected that hydrocarbon will be existed in these sedimentary basins of southern part of Jeju island.

韓國南海의 地質構造에 關한 地球物理學的 硏究

Kyu Jang Cho(曺圭張),Byung Woo Shin(申柄雨) 대한자원환경지질학회 1981 자원환경지질 Vol.14 No.2

An airborne magnetometer survey was carried out over an offshore area of about 200,000㎢ from the southeastern, southern and western part of Korea. Detailed magnetic studies on the geological structure of the southern part of above area (100,000 ㎢) was accomplished. Residual aeromagnetic map was made in order to delineate magnetic provinces, magnetic lineaments and sedimentary basins by application of least square method using computer system. To determine the depth of the sedimentary basins pseudo-gravimetric method was applied. 1. The area studied is divided into four magnetic provinces for the purpose of interpretation on the basis of the magnetic maps. 2. Near shore area and its attached islands of southern part (first and second magnetic province) can be regarded as being the extension from the land geology due to presentation of strong magnetic anomalies and shallow magnetic basements. 3. Magnetic lineament 1-1 is strong magnetic anomalous region which is presumably relevant to volcanic activities in Cretaceous. The depth of magnetic basement of the lineament was determined to 1,500 m. Negative magnetic anomalous zones B1-1 and B1-2 which represent Tertiary basins showed depth of magnetic basement 3 km and 4 km each. The latter can be interpreted as extension of the Taiwan basin which is consisted of Tertiary sediments. 4. Magnetic lineament 2-1 coincide with Rainan-Fukien massif running NE-SW direction. A lineament located in central Part of magnetic lineament 2-1 is well connected with extension of Sobacksan anticlinal axis on land. Volcanic rocks in Gyongsang system concentrated along this lineament. 5. The characteristics of magnetic pattern in the southern Yellow sea basin of western part of Jeju island show weaker magnetic anomalies and deeper magnetic basements than first and second magnetic provinces indicating geological structure of this basin seems to be quite different from that of Jeju strait. 6. in southern part of Jeju island, smoother magnetic pattern develops southward. Maximum depth of magnetic basement in sedimentary basins By-1 and By-2 were determined down to 6,000 m increasing its thickness toward Taiwan up to 11,000 m in the shelf area off Taichung, Taiwan. Judging from the fact that hydrocarbon was founded in the Tertiary sediments of western coastal area of Taiwan, it can be expected that hydrocarbon will be existed in these sedimentary basins of southern part of Jeju island.

미소지진(微小地震) 장기관측(長期觀測)을 위한 지진기록계(地震記錄計)의 개발(開發)

김성균,조규장,정부흥,문창배,신인철,성낙훈,Kim, Sung Kyun,Cho, Kyu Jang,Chung, Bu Heung,Moon, Chang Bae,Sin, In Chul,Sung, Rack Hoon 대한자원환경지질학회 1988 자원환경지질 Vol.21 No.2

A two channel seismic recorder suitable for long-term observation of microearthquakes is developed. The direct analogue recording on cassette tape is adopted in the recorder whose circuits of amplifier and mortor units of an audio cassette recorder are modified. The recorder provides contineous record of 10 days with DC 12V battery (100AH) and with standard cassette tape of 60 minute use. The binary coded time signals of date, hour, and minute are generated once a minute by the timing system and absolute time input using radio to measure the time drift is also possible. For the seismic signal processing, the analogue signals from audio cassette player pass A/D converter and digitized data are stored in personal computer. Then visual records can be obtained using computer graphic mode. Basic programs "ADCONVO" and "DRAWO" to accomplish A/D conversions, the creation of data files and visualization of signals were written. Some sample signals reproduced from the recorded tape are presented.

微小地震 長期觀測을 위한 地震記錄計의 開發

Sung Kyun Kim(金性均),Kyu Jang Cho(曺圭張),Bu Heung Chung(鄭富興),Chang Bae Moon(文昌培),In Chui Sin(申仁澈),Rack Hoon Sung(成樂勳) 대한자원환경지질학회 1988 자원환경지질 Vol.21 No.2

A two channel seismic recorder suitable for long-term observation of microearthquakes is developed. The direct analogue recording on cassette tape is adopted in the recorder whose circuits of amplifier and mortor units of an audio cassette recorder are modified. The recorder provides contineous record of 10 days with DC 12V battery (100AH) and with standard cassette tape of 60 minute use. The binary coded time signals of date, hour, and minute are generated once a minute by the timing system and absolute time input using radio to measure the time drift is also possible. For the seismic signal processing, the analogue signals from audio cassette player pass A/D converter and digitized data are stored in personal computer. Then visual records can be obtained using computer graphic mode. Basic programs “ADCONVO” and “DRAWO” to accomplish A/D conversions, the creation of data files and visualization of signals were written. Some sample signals reproduced from the recorded tape are presented.

수치지형모형을 (數値地形模型) 이용한 경관해석에 관한 연구

유복모(Yeu Bock Mo),권현(Kwon Hyun),조규장(Cho Kyu Jang),박성규(Park Sung Kyu) 한국전통조경학회 1991 한국전통조경학회지 Vol.9 No.1

N/A N/A

韓國南海에 關한 地球物理學的 硏究

曺圭張 한양대학교 1981 학술회의 논문집 Vol.- No.1

An airborne magnetometer survey was carried out over an offshore area of about 200,000㎢ from the southestern, southern and western part of Korea. DEtailed magnetic studies on the geoolgical structure of the southern part of above area(100,000㎢) was accomplished. Residual aeromagnetic map was made in order to delineate magnetic provinces, magnetic lineaments and sedimentary basins by application of least square method using computer system. To determine the depth of the sedimentary basins, pseudo-gravimetric method was applied. 1. The area studied is divided into four magnetic provinces for the purpose of interpretation on the basis of the magnetic maps. 2. Near shore area and its attached islands of southern part(First and Second magnetic province) can be regarded as being the extension from the land geology due to presentation of strong magnetic anomalies and shallow magnetic basements. 3. Magnetic lineament 1-st strong magnetic anomalous region which is presumably relevant to volcanic activities in Cretaceous. The depth of magnetic basement of the lineament was determined to 1,500m. Negative magnetic anomalous zones B1-1and B1-2 which represent Tertiary basins showed depth of magnetic basement 3 Km and 4 Km each, whereas the depth of acoustic basement indicated 4-5 Km in the B1-2 basin. The B1-2 basin can be interpreted as extension of the Taiwas basin which is consisted of Tertiary sediments. 4. Magnetic lineament 2-1 coincide with Rainan-Fukien Massif running NE-SW direction. A lineament located in central part of Magnetic lineament 2-1 is well connected with extension of Dukyusan anticlinal axis on land. Volcanic rocks in Kyong-sang system concentrated along this lineament. 5. The characteristics of magnetic pattern in the southern Yellow sea basin of western part of Jeju island show weaker magnetic anomalies and deeper magnetic basements than First and Second magnetic provinces indicating geological structure of this basin seems to be ouite different from that of Jeju strait. 6. In southern part of Jeju island, smoother magnetic pattern develope southward. Therefore, the thickness of BIV-1 and BIV-2 is getting thicker southwesterly toward Taiwan. Judging from the fact that hydrocarbon was founded in the Tertiary sediments of western coastal area of Taiwan, it can be expected that hydrocarbon will be existed in these sedimentary basins of southern part of Jeju island.