Magnetotelluric transect across the Niigata-Kobe Tectonic Zone, central Japan

A clear correlation between strain accumulation and resistivity structure

R. Yoshimura, N. Oshiman, M. Uyeshima, H. Toh, T. Uto, H. Kanezaki, Y. Mochido, Koki Aizawa, Y. Ogawa, T. Nishitani, S. Sakanaka, M. Mishina, H. Satoh, T. Goto, T. Kasaya, S. Yamaguchi, H. Murakami, T. Mogi, Y. Yamaya, M. Harada & 6 others I. Shiozaki, Y. Honkura, S. Koyama, S. Nakao, Y. Wada, Y. Fujita

研究成果: ジャーナルへの寄稿記事

14 引用 (Scopus)

抄録

We obtained an electrical transect image of the Niigata-Kobe Tectonic Zone (NKTZ). Several major active faults are located in this zone of concentrated deformation. The main features of the final two-dimensional model are a thick resistive block in the upper crust, with a thinned-out portion beneath the Atotsugawa Fault, and a strong conductor in the lower crust that intrudes upward into the upper resistor. The upper crustal resistive zone corresponds well to the spatiality of the NKTZ, and relatively conductive zones sandwiching this resistor may contribute to observed changes in displacement rates. The overlapping locations of the conductor and the low-velocity body in the lower crust indicate that the conductor represents a zone that was weakened by fluids. Given that microearthquakes are localized in the regions between the resistive and conductive zones, we suggest that the distribution of earthquakes is influenced by intrusions of fluid derived from the conductor.

元の言語英語
記事番号L20311
ジャーナルGeophysical Research Letters
36
発行部数20
DOI
出版物ステータス出版済み - 10 1 2009
外部発表Yes

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electrical resistivity
tectonics
Japan
transect
conductors
crusts
resistors
fluids
lower crust
two dimensional models
intrusion
low speed
earthquakes
microearthquake
fluid
active fault
upper crust
earthquake

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

これを引用

Magnetotelluric transect across the Niigata-Kobe Tectonic Zone, central Japan : A clear correlation between strain accumulation and resistivity structure. / Yoshimura, R.; Oshiman, N.; Uyeshima, M.; Toh, H.; Uto, T.; Kanezaki, H.; Mochido, Y.; Aizawa, Koki; Ogawa, Y.; Nishitani, T.; Sakanaka, S.; Mishina, M.; Satoh, H.; Goto, T.; Kasaya, T.; Yamaguchi, S.; Murakami, H.; Mogi, T.; Yamaya, Y.; Harada, M.; Shiozaki, I.; Honkura, Y.; Koyama, S.; Nakao, S.; Wada, Y.; Fujita, Y.

:: Geophysical Research Letters, 巻 36, 番号 20, L20311, 01.10.2009.

研究成果: ジャーナルへの寄稿記事

Yoshimura, R, Oshiman, N, Uyeshima, M, Toh, H, Uto, T, Kanezaki, H, Mochido, Y, Aizawa, K, Ogawa, Y, Nishitani, T, Sakanaka, S, Mishina, M, Satoh, H, Goto, T, Kasaya, T, Yamaguchi, S, Murakami, H, Mogi, T, Yamaya, Y, Harada, M, Shiozaki, I, Honkura, Y, Koyama, S, Nakao, S, Wada, Y & Fujita, Y 2009, 'Magnetotelluric transect across the Niigata-Kobe Tectonic Zone, central Japan: A clear correlation between strain accumulation and resistivity structure', Geophysical Research Letters, 巻. 36, 番号 20, L20311. https://doi.org/10.1029/2009GL040016
Yoshimura, R. ; Oshiman, N. ; Uyeshima, M. ; Toh, H. ; Uto, T. ; Kanezaki, H. ; Mochido, Y. ; Aizawa, Koki ; Ogawa, Y. ; Nishitani, T. ; Sakanaka, S. ; Mishina, M. ; Satoh, H. ; Goto, T. ; Kasaya, T. ; Yamaguchi, S. ; Murakami, H. ; Mogi, T. ; Yamaya, Y. ; Harada, M. ; Shiozaki, I. ; Honkura, Y. ; Koyama, S. ; Nakao, S. ; Wada, Y. ; Fujita, Y. / Magnetotelluric transect across the Niigata-Kobe Tectonic Zone, central Japan : A clear correlation between strain accumulation and resistivity structure. :: Geophysical Research Letters. 2009 ; 巻 36, 番号 20.
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abstract = "We obtained an electrical transect image of the Niigata-Kobe Tectonic Zone (NKTZ). Several major active faults are located in this zone of concentrated deformation. The main features of the final two-dimensional model are a thick resistive block in the upper crust, with a thinned-out portion beneath the Atotsugawa Fault, and a strong conductor in the lower crust that intrudes upward into the upper resistor. The upper crustal resistive zone corresponds well to the spatiality of the NKTZ, and relatively conductive zones sandwiching this resistor may contribute to observed changes in displacement rates. The overlapping locations of the conductor and the low-velocity body in the lower crust indicate that the conductor represents a zone that was weakened by fluids. Given that microearthquakes are localized in the regions between the resistive and conductive zones, we suggest that the distribution of earthquakes is influenced by intrusions of fluid derived from the conductor.",
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T2 - A clear correlation between strain accumulation and resistivity structure

AU - Yoshimura, R.

AU - Oshiman, N.

AU - Uyeshima, M.

AU - Toh, H.

AU - Uto, T.

AU - Kanezaki, H.

AU - Mochido, Y.

AU - Aizawa, Koki

AU - Ogawa, Y.

AU - Nishitani, T.

AU - Sakanaka, S.

AU - Mishina, M.

AU - Satoh, H.

AU - Goto, T.

AU - Kasaya, T.

AU - Yamaguchi, S.

AU - Murakami, H.

AU - Mogi, T.

AU - Yamaya, Y.

AU - Harada, M.

AU - Shiozaki, I.

AU - Honkura, Y.

AU - Koyama, S.

AU - Nakao, S.

AU - Wada, Y.

AU - Fujita, Y.

PY - 2009/10/1

Y1 - 2009/10/1

N2 - We obtained an electrical transect image of the Niigata-Kobe Tectonic Zone (NKTZ). Several major active faults are located in this zone of concentrated deformation. The main features of the final two-dimensional model are a thick resistive block in the upper crust, with a thinned-out portion beneath the Atotsugawa Fault, and a strong conductor in the lower crust that intrudes upward into the upper resistor. The upper crustal resistive zone corresponds well to the spatiality of the NKTZ, and relatively conductive zones sandwiching this resistor may contribute to observed changes in displacement rates. The overlapping locations of the conductor and the low-velocity body in the lower crust indicate that the conductor represents a zone that was weakened by fluids. Given that microearthquakes are localized in the regions between the resistive and conductive zones, we suggest that the distribution of earthquakes is influenced by intrusions of fluid derived from the conductor.

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