본문 바로가기
HOME> 논문 > 논문 검색상세

논문 상세정보

Journal of Asian earth sciences v.151, 2018년, pp.148 - 172   SCIE
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

Spatiotemporal distribution of low-frequency earthquakes in Southwest Japan: Evidence for fluid migration and magmatic activity

Yu, Zhiteng (Department of Geophysics, Tohoku University, Sendai 980-8578, Japan ) ; Zhao, Dapeng (Department of Geophysics, Tohoku University, Sendai 980-8578, Japan ) ; Niu, Xiongwei (Department of Geophysics, Tohoku University, Sendai 980-8578, Japan ) ; Li, Jiabiao (State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China ) ;
  • 초록  

    Abstract Low-frequency earthquakes (LFEs) in the lower crust and uppermost mantle are widely observed in Southwest Japan, and they occur not only along the subducting Philippine Sea (PHS) slab interface but also beneath active arc volcanoes. The volcanic LFEs are still not well understood because of their limited quantities and less reliable hypocenter locations. In this work, seismic tomography is used to determine detailed three-dimensional (3-D) P- and S-wave velocity (Vp and Vs) models of the crust and upper mantle beneath Southwest Japan, and then the obtained 3-D Vp and Vs models are used to relocate the volcanic LFEs precisely. The results show that the volcanic LFEs can be classified into two types: pipe-like and swarm-like LFEs, and both of them are located in or around zones of low-velocity and high-Poisson’s ratio anomalies in the crust and uppermost mantle beneath the active volcanoes. The pipe-like LFEs may be related to the fluid migration from the lower crust or the uppermost mantle, whereas the swarm-like LFEs may be related to local magmatic activities or small magma chambers. The number of LFEs sometimes increases sharply before or after a nearby large crustal earthquake which may cause cracks and fluid migration. The spatiotemporal distribution of the LFEs may indicate the track of migrating fluids. As compared with the tectonic LFEs along the PHS slab interface, the volcanic LFEs are more sensitive to fluid migration and local magmatic activities. High pore pressures play an important role in triggering both types of LFEs in Southwest Japan. Highlights Low-frequency earthquakes (LFEs) in SW Japan are relocated precisely using a 3-D velocity model. The volcanic LFEs occur in or around zones of low-velocity and high Poisson’s ratio in the crust and uppermost mantle. The LFEs reflect migration of crustal fluids and ascending arc magmas. Graphical abstract [DISPLAY OMISSION]


  • 주제어

    Low-frequency earthquakes .   Southwest Japan .   Seismic tomography .   Active volcanoes .   Fluid migration .   Subduction dynamics.  

 활용도 분석

  • 상세보기

    amChart 영역
  • 원문보기

    amChart 영역

원문보기

무료다운로드
  • 원문이 없습니다.

유료 다운로드의 경우 해당 사이트의 정책에 따라 신규 회원가입, 로그인, 유료 구매 등이 필요할 수 있습니다. 해당 사이트에서 발생하는 귀하의 모든 정보활동은 NDSL의 서비스 정책과 무관합니다.

원문복사신청을 하시면, 일부 해외 인쇄학술지의 경우 외국학술지지원센터(FRIC)에서
무료 원문복사 서비스를 제공합니다.

NDSL에서는 해당 원문을 복사서비스하고 있습니다. 위의 원문복사신청 또는 장바구니 담기를 통하여 원문복사서비스 이용이 가능합니다.

이 논문과 함께 출판된 논문 + 더보기