초록

- 울릉도 북서부 해역 약 $6,000km^2$에 대한 지질 지구물리 선상조사(북위 37도 30분~38도 00분, 동경 130도 00분~131도 00분)
- 조사 자료를 기반으로 한 조사지역 광역 해저지질 주제도 작성
- 해저지질도 대외 서비스 기반 조성 및 지원 홍보

Abstract ▼

The 'Marine Geological and Geophysical Mapping of the Korean Seas' is a thirty-year-long government program, the goal of which is to publish a series of five regional-scale (1:250,000) thematic maps of the Korean seas and to develop a better understanding of the origin, character, evolution and pote

The 'Marine Geological and Geophysical Mapping of the Korean Seas' is a thirty-year-long government program, the goal of which is to publish a series of five regional-scale (1:250,000) thematic maps of the Korean seas and to develop a better understanding of the origin, character, evolution and potential economic value of the seafloor strata with respect to geologic and geophysical points of views. Since 1980 approximately 90% of the target area (ca. $30,000km^2$) has been surveyed and mapped although the quality of survey specification and acquired data has changed depending on the research environment.
This report is a second-year summary of the three-year project launched to publish a 1:250,000-scale map of the southern part of the Korea Plateau in the East Sea. The survey area is the northwestern sea of the Ulleung Island ($37^{\circ}30'~38^{\circ}00'N, 130^{\circ}00'~131^{\circ}00'E$) and the areal extent is approximately $6,000km^2$.
650 line-km records of single-beam echo-sounder, 3.5 kHz chirp acoustic profiler, digital multi-channel air-gun seismic system, gravimeter and magnetometer were achieved. Based on the onboard interpretation of the chirp acoustic profiles ten cored samples were recovered using an eight-meter-long piston corer. The survey vessel used was the R/V Tamhae II of Korea Institute of Geoscience and Mineral Resources and the ship's navigation was controlled and logged with TRINAV navigation system and differential global positioning systems. The survey was conducted for nine days from 24th, March to 1st, April.
Collating the acquired geophysical data and cored samples laboratory analyses were performed and the results were presented as five thematic maps on bathymetry, shallow seafloor geology, total sedimentary strata, magnetic and gravity anomalies. The five maps will be compiled in the final year (2009) and published into the 'Marine Geology Map of the Korean Seas, Series XIX (Samcheok-Kangneung Area)'.
This report is produced through the research fund of the Ministry of Knowledge Economy (MKE) of Korea

목차 Contents

• 제 1 장 서론 ...17
• 제 2 장 국내외 기술개발 현황 ...19
• 제 1 절 국내 기술개발 현황 ...19
• 제 2 절 해외 기술개발 현황 ...22
• 제 3 장 연구개발 수행 내용 및 결과 ...26
• 제 1 절 연구지역 개괄 ...26
• 제 2 절 연구 방법 ...29
• 1. 선상자료 취득 ...29
• 2. 자료처리 및 분석 ...39
• 제 3 절 연구 결과 ...50
• 1. 수심 및 해저지형 ...50
• 2. 천부지층 퇴적상 및 물성 특성 ...52
• 3. 심부퇴적층 탄성파 층서 및 층후 ...72
• 4. 중력 특성 ...75
• 5. 자력 특성 ...76
• 제 4 절 결론 ...77
• 제 4장 연구개발 목표 달성도 및 결과의 활용도 ...79
• 참고문헌 ...81
• Fig. 1.1. The location of 2008 survey area for marine geology mapping program ...18
• Fig. 2.1. Survey tracks around the Korean peninsular before 1983 (Chough, 2000) ...20
• Fig. 2.2. Survey tracks made by Korean agencies and cooperations between 1983 and 1999 (Chough, 2000) ...20
• Fig. 2.3. R/V Tamhae 2 ...19
• Fig. 2.4. 해저지질도 작성사업 수행 현황 ...21
• Fig. 2.5. 미국 지질조사소가 제작한 Massachusetts 주 연안지역 해저지질도 ...24
• Fig. 2.6. 영국의 1:250,000 축척 연안 해저지질도 발간 현황 ...25
• Fig. 2.7. 일본의 해저지질도 발간 현황 ...25
• Fig. 3.1. 동해 및 주변해의 지리적, 지정학적 위치(출처: Google Earth) ...26
• Fig. 3.2. 동해의 초기 열개 모델(Jolivet and Tamaki, 1992) ...27
• Fig. 3.3. 울릉분지(노랑색 원)와 조사구역의 위치(붉은색 사각형) ...28
• Fig. 3.4. 조사기간 중 항측자료 취득 및 모니터링을 위하여 사용된 탐해2호의 Trinav 항측시스템 ...30
• Fig. 3.5. 항측 기준점(Ref. Point)과 각 사용 장비들의 이격거리를 보여주는 도면 ...31
• Fig. 3.6. Track plot of 2008 survey. Black dots denote shot points and red circles are the locations of core samples ...32
• Fig. 3.7. Field logs of seismic survey and core sampling of 2008 onboard survey ...33
• Fig. 3.8. Noise diagram shown by the TRIQC system ...34
• Fig. 3.9. G-880 해상 자력계 시스템의 예인용 센서 ...37
• Fig. 3.10. Benthos Chirp ll acoustic Profiler system ...38
• Fig. 3.11. A piston corer used for 2008 survey ...38
• Fig. 3.12. Gravitimeter used for the survey (Microg LaCoste사) ...40
• Fig. 3.13. A picture of the multi-sensor core logger of KIGAM (Geotek MSCL-5) (above) ...46
• Fig. 3.14. Digital image aquisition device attached to a XRF scanner ...47
• Fig. 3.15. Spectrophotometer CM-2500d (left) and representation of color solid for L*a*b* color space (right). The numbers on each end of circles indicate ranges of L*a*b* values ...48
• Fig. 3.16. Digital X-ray scanner and sample image ...48
• Fig. 3.17. Microtrac사의 레이저 회절 입도분석기 사진 ...49
• Fig. 3.18. Bathymetric map of the study area. Contour interval is 100 meters ...51
• Fig. 3.19. Bathymetry of Ulleung Basin and locations of piston cores ...52
• Fig. 3.20. Locations of 08MAP-P01 and 08MAP-P02 cores on Chirp sub-bottom profiles crossing the core sites ...53
• Fig. 3.21. L* values (the g-eater value means lighter color), grain size statistics, and textural composition of the core 08MAP-P01 ...54
• Fig. 3.22. Variations of P-wave velocity, gamma density, water content, porosity, magnetic susceptibility, and resistivity of 08MAP-P01 core ...54
• Fig. 3.23. L* values (the greater value means lighter color), grain-size statistics, and textural composition of the core 08MAP-P02 ...55
• Fig. 3.24. Variations of p-wave velocity, gamma density, water content, porosity, magnetic susceptibility, and resistivity of 08MAP-P02 core ...56
• Fig. 3.25. Locations of core 08MAP-P3 on Chirp sub-bottom profile crossing the core sites ...57
• Fig. 3.26. Variations of p-wave velocity, gamma density, water content, porosity, and magnetic susceptibility of 08MAP-P03 core ...57
• Fig. 3.27. Locations of core 08MAP-P04 and 08MAP-P05 on Chirp subbottom profiles crossing the core sites ...58
• Fig. 3.28. L* values (the greater value means lighter color), grain size statistics, and textural composition of the core 08MAP-P04 ...59
• Fig. 3.29. Variations of p-wave velocity, gamma density, water content, porosity, magnetic susceptibility, and resistivity of 08MAP-P04 core ...59
• Fig. 3.30. L* values (the greater value means lighter color), grain-size statistics, and textural composition of the core 08MAP-P05 ...60
• Fig. 3.31. Variations of p-wave velocity, gamma density, water content, porosity, magnetic susceptibility, and resistivity 08MAP-P05 core ...61
• Fig. 3.32. Locations of core 08MAP-P06 on Chirp subbottom profile crossing the core sites ...62
• Fig. 3.33. L* values (the greater value means lighter color), grain-size statistics, and textural composition of the core 08MAP-P06 ...63
• Fig. 3.34. Variations of p-wave velocity, gamma density, water content, porosity, magnetic susceptibility, and resistivity of 08MAP-P06 core ...63
• Fig. 3.35. Locations of core 08MAP-P07 on Chirp subbottom profile crossing the core sites ...64
• Fig. 3.36. L* values (the greater value means lighter color), grain-size statistics, and textural composition of the core 08MAP-P07 ...65
• Fig. 3.37. Variations of p-wave velocity, gamma density, water content, porosity, magnetic susceptibility, and resistivity of 08MAP-P07 core ...65
• Fig. 3.38. Locations of core 08MAP-P08 on Chirp subbottom profile crossing the core sites ...66
• Fig. 3.39. L* values (the greater value means lighter color), grain-size statistics, and textural composition of the core 08MAP-P08 ...67
• Fig. 3.40. Variations of p-wave velocity, gamma density, water content, porosity, magnetic susceptibility, and resistivity of 08MAP-P08 core ...67
• Fig. 3.41. Locations of core 08MAP-P09 on Chirp subbottom profile crossing the core sites ...68
• Fig. 3.42. L* values (the greater value means lighter color), grain-size statistics, and textural composition of the core 08MAP-P09 ...69
• Fig. 3.43. Variations of p-wave velocity, gamma density, water content, porosity, magnetic susceptibility, and resistivity of 08MAP-P08 core ...69
• Fig. 3.44. Locations of core 08MAP-P10 on a Chirp sub-bottom profile crossing the core sites ...71
• Fig. 3.45. L* values (the greater value means lighter color), grain-size statistics, and textural composition of the core 08MAP-P10 ...71
• Fig. 3.46. Variations of p-wave velocity, gamma density, water content, porosity, magnetic susceptibility, and resistivity of 08MAP-P10 core ...72
• Fig. 3.47. The 08MAP-09 profile showing the seismic strata of the study area. Note the eastern side of deeper water depth resides in the West Ulleung Interplain Gap. See the track in the Fig. 3.6 ...73
• Fig. 3.48. Isopach map of the unit I. The contour Interval is 0.05 in two-way travel time ...73
• Fig. 3.49. Isopach map of the unit II. The contour interval is 0.1 sec in two way travel time ...74
• Fig. 3.50. Isopach map of the unit III. The contour interval is 0.1 sec. in two-way travel time ...74
• Fig. 3.51. Free-air gravity anomaly map ...75
• Fig. 3.52. Total intensity anomaly map ...76
• Table 3.1. 탄성파 탐사작업에 사용된 음향장비의 제원과 취득 사양 ...35
• Table 3.2. Locations and water depths of core sites ...39
• Table 3.3. Detailed specification of MSCL used for the measurement of geophysical properties of marine core sediments which obtained from Ulleung Basin, East Sea, Korea ...47