가음단층계의 선형구조 추출과 선형구조와 단층활동의 관련성
Extraction of Lineament and Its Relationship with Fault Activation in the Gaeum Fault System
1
조회
0
다운로드
8
인용
0
참고문헌
키워드
초록
The purpose of this study is to extract lineaments in the southeastern part of the Gaeum Fault System, and to understand their characteristics and a relationship between them and fault activation. The lineaments were extracted using a multi-layered analysis based on a digital elevation model (5 m resolution), aerial photos, and satellite images. First-grade lineaments inferred as an high-activity along them were classified based on the displacement of the Quaternary deposits and the distribution of fault-related landforms. The results of classifying the first-grade lineaments were verified by fieldwork and electrical resistivity survey. In the study area of 510 km2, a total of 222 lineaments was identified, and their total length was 333.4 km. Six grade lineaments were identified, and their total length was 11.2 km. The lineaments showed high-density distribution in the region along the Geumcheon, Gaeum, Ubo fault, and a boundary of the Hwasan cauldron consisting the Gaeum Fault System. They generally have WNW-ESE trend, which is the same direction with the strike of Gaeum Fault System. Electrical resistivity survey was conducted on eight survey lines crossing the first-grade lineament. A low-resistivity zone, which is assumed to be a fault damage zone, has been identified across almost all survey lines (except for only one survey line). The visual (naked eyes) detecting of the lineament was evaluated to be less objectivity than the automatic extraction using the algorithm. However, the results of electrical resistivity survey showed that first-grade lineament extracted by visual detecting was 83% reliable for inferred fault detection. These results showed that objective visual detection results can be derived from multi-layered analysis based on tectonic geomorphology.
Abstract
The purpose of this study is to extract lineaments in the southeastern part of the Gaeum Fault System, and to understand their characteristics and a relationship between them and fault activation. The lineaments were extracted using a multi-layered analysis based on a digital elevation model (5 m resolution), aerial photos, and satellite images. First-grade lineaments inferred as an high-activity along them were classified based on the displacement of the Quaternary deposits and the distribution of fault-related landforms. The results of classifying the first-grade lineaments were verified by fieldwork and electrical resistivity survey. In the study area of 510 km2, a total of 222 lineaments was identified, and their total length was 333.4 km. Six grade lineaments were identified, and their total length was 11.2 km. The lineaments showed high-density distribution in the region along the Geumcheon, Gaeum, Ubo fault, and a boundary of the Hwasan cauldron consisting the Gaeum Fault System. They generally have WNW-ESE trend, which is the same direction with the strike of Gaeum Fault System. Electrical resistivity survey was conducted on eight survey lines crossing the first-grade lineament. A low-resistivity zone, which is assumed to be a fault damage zone, has been identified across almost all survey lines (except for only one survey line). The visual (naked eyes) detecting of the lineament was evaluated to be less objectivity than the automatic extraction using the algorithm. However, the results of electrical resistivity survey showed that first-grade lineament extracted by visual detecting was 83% reliable for inferred fault detection. These results showed that objective visual detection results can be derived from multi-layered analysis based on tectonic geomorphology.
참고문헌 (32)
- Cha, M. S, "Cretaceous volcanic cauldrons and ring complex in Korea", Journal of the Geological Society of Korea, 24(Special issue), pp.67~86 (1988)
- Cheon, Y. B, "Tectonic evolution of the Cretaceous Gyeongsang Basin focused on the Jinju, Daegu, and Uiseong blocks", Ph.D, pp.2018
- Cheon, Y. B, "Intraplate strike-slip reactivation of the Sinnyeong fault in the Cretaceous Gyeongsang Basin, Korea, Due to the concertration of later compressional stress", Journal of Geoscience and Environment Protection, 1(3), pp.12~17 (2013)
- 조영동, "경북 영천시 고현천의 하안단구 지형 분석", 대한지리학회지, 44(4), pp.447~462 (2009), 대한지리학회
- 최진혁, "대규모 지진에 수반된 지표파열특성에 관한 최근 연구동향", 지질학회지, 53(1), pp.129~157 (2017), 대한지질학회[DOI]
- 최진혁, "울산시 상천리 일대에서 발달하는 남부 양산단층대의 단층대 분류와 지질구조적 특성", 지질학회지, 45(1), pp.9~28 (2009), 대한지질학회
- 황학수, "경주시 외동읍 구어리 일대 동래단층 연장성 확인을 위한 물리탐사 적용", 지질공학, 27(3), pp.207~215 (2017), 대한지질공학회
- 임창복, "원자력발전소 부지에 적용하는 활동성 단층의 기준 및 그 배경", 지질학회지, 40(2), pp.279~284 (2004), 대한지질학회
- 김희준, "한국의 전기비저항탐사", 자원환경지질, 39(4), pp.473~483 (2006), 대한자원환경지질학회
- 김지수, "지구물리탐사와 트렌치조사에 의한 일광단층의 특성", 지질학회지, 39(2), pp.211~223 (2003), 대한지질학회
- Kim, S. J, "-Ar ages and geochemistry for granitic and volcanic rocks in the Euiseong and Shinryeong area, Korea", Economic and Environmental Geology, 30, pp.603~612 (1997)
- Kim, S. W, "Lineament analysis in th Euiseong area using automatic lineament extraction algorithm", Economic and Environmental Geology, 32(1), pp.19~31 (1999)
- Kim, W. K, "A technique assessing geological lineaments using remotely sensed data and DEM: Euiseong area, Kyungsang Basin", Journal of the Korean Society of Remote Sensing, 12(2), pp.139~154 (1996)
- 김영석, "활성단층의 이해: 최근의 연구에 대한 고찰", 지질학회지, 47(6), pp.723~752 (2011), 대한지질학회
- Kwon, B. D, "Electric and electromagnetic surveys of the Hongseong fault zone", Journal of Korean Earth Science Society, 24(4), pp.361~368 (2003)
- Lee, B. J, "Relationship between the Kaum fault and the Yangsan fault at the northeastern part of the Cretaceous Kyongsang Basin, Korea", Journal of the Geological Society of Korea, 33(1), pp.1~8 (1997)
- 이초희, "양산단층대 북부 유계-보경사지역의 조구조지형학적 분석", 한국지형학회지, 26(1), pp.93~106 (2019), 한국지형학회[DOI]
- 이광률, "울산단층대 주변의 단층 지형 및 선구조 분포", 한국지형학회지, 25(3), pp.89~103 (2018), 한국지형학회[DOI]
- 이광률, "동래 단층 중부 지역 웅촌-웅상 일대의 단층 지형과 지형 발달", 한국지형학회지, 26(1), pp.79~91 (2019), 한국지형학회[DOI]
- 이민부, "Hough변환과 음영기복을 이용한 추가령구조곡의 선형구조 분석", 지질학회지, 38(4), pp.457~469 (2002), 대한지질학회
- NEMA (National Emergency Management Agency), "Active Fault Map and Seismic Hazard Map" (2012)
- 오경섭, "구조지형학 관점에서 본 한반도 중부의 지형선구조 체계", 한국지형학회지, 14(2), pp.1~19 (2007), 한국지형학회
- 오경섭, "양양-속초지역 태백산지 동사면 및 동해안에서 안식되는 지형요소의 선구조", 한국지형학회지, 9(1), pp.61~69 (2002), 한국지형학회
- Okada, A, "Active fault topography and trench survey in the central part of the Yangsan fault, Southeast Korea", Journal of Geography, 103, pp.111~126 (1994)
- O’Leary, D. W, "Lineament, linear, lineation: Some proposed new standards for old terms", Geological Society of America Bulletin, 87, pp.1463~1469 (1976)
- 박충선, "양산 단층곡 경주 지역의 단층 지형 분석", 한국지형학회지, 25(1), pp.19~30 (2018), 한국지형학회[DOI]
- 박서우, "수치표고모형 공간해상도에 따른 선구조 자동 추출 연구", 대한원격탐사학회지, 34(3), pp.439~450 (2018), 대한원격탐사학회[DOI]
- 양주석, "울산광역시 울주군 삼남면 일대에 발달한 양산단층대의 제4기 단층운동", 자원환경지질, 47(1), pp.17~27 (2014), 대한자원환경지질학회
- Yun, S. H, "Volcanic activity and cauldron structure of the Geumseongsan volcanic complex", Journal of the Geological Society of Korea, 29(4), pp.309~323 (1993)
- Ward, S. H, "Electrical, electromagnetic, and magnetotelluric methods", Geophysics, 45, pp.1659~1666 (1980)