[논문]접지된 전기 송신원을 이용한 일본 북동부 만다이 산에서의 시간영역 항공 전자탐사

Mogi, Toru; Kusunoki, Ken'ichirou; Kaieda, Hideshi; Ito, Hisatoshi; Jomori, Akira; Jomori, Nobuhide; Yuuki, Youichi

접지된 전기 송신원을 이용한 일본 북동부 만다이 산에서의 시간영역 항공 전자탐사
Grounded electrical-source airborne transient electromagnetic (GREATEM) survey of Mount Bandai, north-eastern Japan 원문보기

지구물리와 물리탐사 = Geophysics and geophysical exploration, v.12 no.1, 2009년, pp.1 - 7

Mogi, Toru (호카이도대학 지진화산연구관측센터) , Kusunoki, Ken'ichirou , Kaieda, Hideshi , Ito, Hisatoshi , Jomori, Akira , Jomori, Nobuhide , Yuuki, Youichi (응용지질 (주))

초록
AI-Helper

항공전자탐사기법은 대규모의 접근이 불가능한 지역에 대한 탐사가 가능하여 화산구조를 조사하는데 유용한 탐사기법이나, 낮은 정밀도와 제한된 가탐심도의 단점을 가지고 있다. 접지된 전기송신원을 이용한 시간영역 항공 전자탐사 (GREATEM) 시스템은 항공 시간영역 전자탐사에서 가용한 탐사심도를 높이기 위한 목적으로 개발되었으며, 일본 북동부의 반다이 산 조사에 시험 적용하였다 반다이 산은 해발 1819 m의 안산암 층운화산이다. 1888년 7월에 일어난 화산분출은 북쪽 분화구에 발굽모양의 붕피 암벽과 기반부에 붕락 쇄설암을 남겼다. 이전의 연구 결과들은 반다이 산에서 실시된 GREATEM과 다른 지구물리 기법을 통해 밝혀진 반다이 산의 구조와 붕괴 메커니즘에 대한 자료의 비교분석을 가능하게 하였다. 최근의 화구구에서는 비저항 구조가, 붕괴된 분화구 지역에서는 전도성 구조가 발견되었다. 붕괴벽 주위의 전도성 구조는 열수의 작용으로 인한 변진대와 일치하고 있으며. 이러한 견과는 1888년 발생한 분출과 관련된 붕괴의 주된 원인이 화산체 내부를 구조적으로 약화시킨 열수변질작용과 관련 있다는 주장을 뒷받침하고 있다

Abstract ▼ AI-Helper

Airborne electromagnetics (AEM) is a useful tool for investigating volcanic structures because it can survey large and inaccessible areas. Disadvantages include lower accuracy and limited depth of investigation. The Grounded Electrical Source Airborne Transient Electromagnetic(GREATEM)survey system was developed to increase the depth of investigation possible using AEM. The method was tested in a survey at Mount Bandai in north-eastern Japan. Mount Bandai is an andesitic stratovolcano that rises 1819m above sea level. An eruption in July 1888 left a hoof-shaped collapsed wall in its northern crater and avalanche debris at its base. Previous surveys of Mount Bandai allow for comparisons of data on its structure and collapse mechanism as obtained by GREATEM and other geophysical methods. The results show resistive structures in recent volcanic cones and conductive structures in the collapsed-crater area. Conductive areas around the collapsed wall correspond to an alteration zone resulting from hydrothermal activity, supporting the contention that a major cause of the collapse associated with the 1888 eruption was hydrothermal alteration that structurally weakened the interior of the volcanic edifice.

주제어

AI 본문요약
AI-Helper

* AI 자동 식별 결과로 적합하지 않은 문장이 있을 수 있으니, 이용에 유의하시기 바랍니다.

문제 정의

(1998), has recently been improved and used in practical surveys. This paper describes the GREATEM system and discusses survey results for Mount Bandai.
A GREATEM survey was carried out at Mount Bandai to clarify resistivity structures relevant to ongoing volcanic activity and the collapse that occurred during the volcano’s 1888 eruption. This paper has discussed GREATEM survey techniques and their advantages with respect to volcanic research. The survey results depict the resistivity structure in the vicinity of the collapsed crater and wall and over the volcano’s summit.

가설 설정

GREATEM results were almost identical to those obtained by other geophysical methods such as P-wave seismic surveying, DIGHEM-type AEM, dipole–dipole resistivity surveying, and MT surveying. The resistivity structures determined by these surveys support the idea that hydrothermal alteration was an important factor in weakening the volcanic edifice, as originally proposed by Yamamoto et al. (1999).

제안 방법

Recently, a project supported by Japan’s Ministry of Education, Culture, Sports, Science and Technology (MEXT) provided the opportunity to refine the system. The project, focused on developing integrated airborne geophysical systems for disaster-prevention applications, was intended to investigate not only geological structures but also groundwater movement and temperature distribution (Ito et al., 2007).

대상 데이터

, 2002) to monitor direction were both set on gimbals, and a three-component induction-coil magnetometer was installed at the rear of the gimbal mount. These instruments and the batteries were placed in the bird, and the data-acquisition instruments, consisting of a data-control PC and a high-precision clock synchronised with the transmitter-control clock, were set up in the helicopter cabin. Full time-series data were collected to facilitate the elimination of noise.

이론/모형

The resistivity map derived from this study (Figure 7) can be compared with the apparent resistivity maps obtained using a DIGHEM-type AEM (Tanahashi et al., 1995). These apparent-resistivity maps, at frequencies of 28.

참고문헌 (22)

Elliott, P., 1998, The principles and practice of FLAIRTEM: Explorat Geophysics, 29, 58？60. doi: 10.1071/EG998058

상세보기
Fraser, D. C., 1978, Resistivity mapping with an airborne multi-coil electromagnetic system: Geophysics, 43, 144？172. doi: 10.1190/ 1.1440817

상세보기
Geographical Survey Institute, 1993, 1 : 15000 Geomorphological map of Bandai Volcano, the 1888 eruption and debris avalanche
Goldstein, M. A., and Strangway, D. W., 1975, Audio-frequencymagnetotellurics with grounded electric dipole source: Geophysics, 40,669？683. doi: 10.1190/1.1440558

상세보기
H\ddot{o}rdt, A., and M\ddot{u}ller, M., 2000, Understanding LOTEM data from mountainous terrain: Geophysics, 65, 1113？1123. doi: 10.1190/1.1444804

상세보기
Inoue, J., Kawakmi, N., Takasugi, S., Tanaka, K., and Takeuchi, M., 1995,Resistivity Structure beneath the Bandai Volcano by the MagnetotelluricSoundings, National Research Institute of Earth Science and DisasterPrevention, Ed., Bandai Volcano ？ Recent Progresson Hazard Prevention,pp. 31？41. (in Japanese)
Ito, H., Kaieda, H., Kususnoki, K., Mogi, T., Tanaka, Y., Fujimitsu, Y., and Yuuki, Y., 2007, Development of an integrated airborne geophysical survey system using helicopter ？ Improvement of airborne survey methods of electromagnetic, magnetic, gamma-ray spectrometry and infrared image: Research Report of Central Research Institute of Electrical Power Industry, N06011, 21. [in Japanese with English abstract]
Mitsuhata, Y., Uchida, T., and Amano, H., 2002, 2.5-D inversion of frequency-domain electromagnetic data generated by a grounded-wire source: Geophysics, 67, 1753？1768. doi: 10.1190/1.1527076

상세보기
Mogi, T., Tanaka, Y., Kusunoki, K., Morikawa, T., and Jomori, A., 1998, Development of grounded electrical source airborne transient EM (GREATEM): Exploration Geophysics, 29, 61？64. doi: 10.1071/EG998061

상세보기
Mohri, K., Uchiyama, T., Shen, L. P., Cai, C. M., Panina, L. V., Honkura, Y.,and Yamamoto, M., 2002, Amorphous wire and CMOS IC-based sensitive micromagnetic sensors utilizing magnetoimpedance (MI) and stress-impedance (SI) effects: IEEE Transactions on Magnetics, 38, 3063？3068. doi: 10.1109/TMAG.2002.802438

상세보기
Nishimura, T., Ueki, S., Yamawaki, T., Tanaka, S., Hashino, H., Sato, M., Nakamichi, H., and Hamaguchi, H., 2003, Broadband seismic signals associated with the 2000 volcanic unrest of Mount Bandai, northeasternJapan: Journal of Volcanology and Geothermal Research, 119, 51？59. doi: 10.1016/S0377-0273(02)00305-0

상세보기
NRIESDP (National Research Institute of Earth Science and Disaster Prevention), Ed., 1995, Bandai Volcano ？ Recent Progress on Hazard Prevention, pp. 241. (in Japanese)
Sasaki, Y., and Nakazato, H., 2003, Topographic effects in frequency-domainhelicopter-borne electromagnetics: Exploration Geophysics, 34, 24？28. doi: 10.1071/EG03024

상세보기
Shimozuru, D., 1988, Brief Outline of Bandaisan, In Tokyo Geographical Society, Ed., Bandai-san ？ Centenary of the 1888 eruption of Bandaisan ？, Journal of Geography, 97, 243？255. (in Japanese with English figure captions)

상세보기
Smith, R. S., Annan, A. P., and McGowan, P. D., 2001,A comparison of datafrom airborne, semi-airborne and ground electromagnetic systems: Geophysics, 66, 1379？1385. doi: 10.1190/1.1487084

상세보기
Strack, K.-M., 1992, Exploration with Deep Transient Electromagnetics, Elsevier, pp. 373
Takeuchi, M., Nakazato, H., Mori, M., Fujisaki, O., Kim, H. J., Furuya, T., Ogura, C., and Okuyama, T., 1995, Dipole？Dipole Electrical Resistivity Survey in Bandai Volcano, National Research Institute of Earth Science and Disaster Prevention, Ed., Bandai Volcano ？ Recent Progress on Hazard Prevention, pp. 21？30. (in Japanese)
Tanahashi, M., Morikawa, T., Kusakabe, K., Yoshikawa, H., Tanaka, K., Inokuchi, T., and Takeuchi, M., 1995, Airborne Electromagnetic Investigation in the Bandai Volcano Area ？ The Relation Between the 1888 Debris Avalanche and Low Resistivity Zone ？, National Research Institute of Earth Science and Disaster Prevention, Ed., Bandai Volcano ？ Recent Progress on Hazard Prevention, pp. 1？9. (in Japanese)
Tanaka, K., Mimura, K., Endo, H., and Inokuchi, T., 1995, Slip Surface and Boring of Catastrophic Rockslide Avalanche at Mount Bandai in 1888, National Research Institute of Earth Science and Disaster Prevention Ed., Bandai Volcano ？ Recent Progress on Hazard Prevention, pp. 69？78. (in Japanese)
Tokyo Geographical Society, Ed., 1988, Bandai-san ？ Centenary of the 1888eruption of Bandai-san ？, Journal of Geography, 97, 243？407. (in Japanese)

상세보기
Yamamoto, T., Nakamura, Y., and Glicken, H., 1999, Pyroclastic density current from the 1888 phreatic eruption of Bandai volcano, NE Japan: Journal of Volcanology and Geothermal Research, 90, 191？207. doi: 10.1016/S0377-0273(99)00025-6

상세보기
Yamawaki, T., Tanaka, S., Ueki, S., Hamaguchi, H., and Nakamichi, H., et al.2004, Three-dimensional P-wave velocity structure of Bandai volcano innortheastern Japan inferred from active seismic survey: Journal of Volcanology and Geothermal Research, 138, 267？282. doi: 10.1016/j.jvolgeores.2004.07.010

상세보기

표제어: PCR

동의어: Packet Collision Rate

용어 설명 출처 목록 (6)

용어 설명: PCR은 세균 특이성이 있는 primer를 이용하여 적은 수의 세균이 있을지라도 쉽게 검출할 수 있는 유용한 방법이며, 이를 이용하여 구강 내 치면세균막이나 타액에서 직접 세균을 검출할 수 있게 되었다[8].

내보내기 구분	파일저장 인쇄 메일전송
구성항목	기본정보 상세정보 관리번호, 논문명, 저널/프로시딩명, 저자 , 발행년, 권, 호, 시작페이지, 끝페이지, 발행기관 관리번호, 논문명, 대등논문명, 저자 , 저널/프로시딩명, 발행기관, 발행년, 발행언어, 권, 호, 시작페이지, 끝페이지, ISBN, ISSN, 주제분야, 키워드, 초록(한글), 초록(영문), 저자(소속기관)
저장형식	Text(ASCII format) Excel format RefWorks Direct Export RIS format (for Reference Manager, ProCite, EndNote), Scholar's Aids, Mendeley
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
안내	총 건의 자료가 검색되었습니다. 다운받으실 자료의 인덱스를 입력하세요. (1-10,000) 검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다. 데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요) 다운로드 파일은 UTF-8 형태로 저장됩니다. 파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오. ~ Text(ASCII format) Excel format

연합인증