Subsurface Resistivity Imaging of Nasudake (Chausudake) Volcano Determined from Time Domain Electromagnetic Survey (TDEM)
Toshikazu Tanada*, and Yoichi Nakamura**
*National Research Institute for Earth Science and Disaster Resilience (NIED)
3-1 Tennodai, Tsukuba, Ibaraki 305-0006, Japan
**Utsunomiya University, Tochigi, Japan
A time domain electromagnetic survey (TDEM method) was conducted to investigate the resistivity structure of the crater, fumarole, and hot spring area of the Nasudake (Chausudake) volcano. The findings of this survey are as follows: (1) Under the crater area, a thin low-resistivity layer (approximately 50 m) was found on the surface, and lens-shaped high-resistivity areas continued to a depth of 800 m below it. The lens-shaped high-resistivity areas are believed to correspond to a thermal volcanic gas region. (2) From the east-west direction survey line crossing the foot of the Nasudake, two or three horizontal resistivity layer structures, which are considered to be caused by the geological structure and surface water, were observed.
-  Japan Meteorological Agency, “National Catalogue of the Active Volcanoes in Japan (The Fourth Edition),” Edited by Japan Meteorological Agency and Volcanological Society of Japan, 2013, https://www.data.jma.go.jp/svd/vois/data/tokyo/STOCK/souran/menu_jma_hp.html (in Japanese) [accessed September 9, 2020]
-  T. Hashimoto, W. Kanda, Y. Morita, M. Hayakawa, R. Tanaka, H. Aoyama, and M. Uyeshima, “Significance of Electromagnetic Surveys at Active Volcanoes: Toward Evaluating the Imminence of Wet Eruptions,” J. Disaster Res., Vol.14, No.4, pp. 580-591, doi: 10.20965/jdr.2019.p0580, 2019.
-  S. Takakura, “Estimation of a regional geothermal system by the electromagnetic exploration,” BUTSURI-TANSA (Geophysical Exploration), Vol.67, No.3, pp. 195-203, doi: 10.3124/segj.67.195, 2014 (in Japanese).
-  M. Uyeshima, “Current Topics in Surveys of Electrical Conductivity Structure with the Aid of the Magnetotelluric Method,” Zisin (J. of the Seismological Society of Japan, 2nd ser.), Vol.61, Supplement, pp. S225-S238, doi: 10.4294/zisin.61.225, 2009 (in Japanese).
-  H. Ichihara and M. Ichiki, “An overview of electrical resistivity in the crust and upper mantle: principle of magnetotelluric method, accuracy and resolution of resistivity modeling, and electrical resistivity feature of crustal and mantle rocks and minerals,” Japanese Magazine of Mineralogical and Petrological Sciences, Vol.40, No.3, pp. 73-90, doi: 10.2465/gkk.110131b, 2011 (in Japanese).
-  K. Aizawa, Y. Ogawa, T. Hashimoto, T. Koyama, W. Kanda, Y. Yamaya, M. Mishina, and T. Kagiyama, “Shallow resistivity structure of Asama Volcano and its implications for magma ascent process in the 2004 eruption,” J. of Volcanology and Geothermal Research, Vol.173, Issues 3-4, pp. 165-177, doi: 10.1016/j.jvolgeores.2008.01.016, 2008.
-  K. Aizawa, Y. Ogawa, and T. Ishido, “Groundwater flow and hydrothermal systems within volcanic edifices: Delineation by electric self-potential and magnetotellurics,” J. of Geophysical Research: Solid Earth, Vol.114, Issue B1, Article No.BO1208, doi: 10.1029/2008JB005910, 2009.
-  Nurhasan, Y. Ogawa, N. Ujihara, S. B. Tank, Y. Honkura, S. Onizawa, T. Mori, and M. Makino, “Two electrical conductors beneath Kusatsu-Shirane volcano, Japan, imaged by audiomagnetotellurics, and their implications for the hydrothermal system,” Earth, Planets and Space, Vol.58, Issue 8, pp. 1053-1059, doi: 10.1186/BF03352610, 2006.
-  S. A. Allah and T. Mogi, “Three-dimensional resistivity modeling of GREATEM survey data from Ontake Volcano, northwest Japan,” Earth, Planets and Space, Vol.68, Issue 1, Article No.76, doi: 10.1186/s40623-016-0443-z, 2016.
-  W. Kanda, M. Utsugi, Y. Tanaka, T. Hashimoto, I. Fujii, T. Hasenaka, and N. Shigeno, “A heating process of Kuchi-erabu-jima volcano, Japan, as inferred from geomagnetic field variations and electrical structure,” J. of Volcanology and Geothermal Research, Vol.189, Issues 1-2, pp. 158-171, doi: 10.1016/j.jvolgeores.2009.11.002, 2010.
-  T. Minami, M. Utsugi, H. Utada, T. Kagiyama, and H. Inoue, “Temporal variation in the resistivity structure of the first Nakadake crater, Aso volcano, Japan, during the magmatic eruptions from November 2014 to May 2015, as inferred by the ACTIVE electromagnetic monitoring system,” Earth, Planets and Space, Vol.70, Issue 1, Article No.138, doi: 10.1186/s40623-018-0909-2, 2018.
-  K. Seki, W. Kanda, Y. Ogawa, T. Tanbo, T. Kobayashi, Y. Hino, and H. Hase, “Imaging the hydrothermal system beneath the Jigokudani valley, Tateyama volcano, Japan: implications for structures controlling repeated phreatic eruptions from an audio-frequency magnetotelluric survey,” Earth, Planets and Space, Vol.67, Issue 1, Article No.6, doi: 10.1186/s40623-014-0169-8, 2015.
-  K. Seki, W. Kanda, T. Tanbo, T. Ohba, Y. Ogawa, S. Takakura, K. Nogami, M. Ushioda, A. Suzuki, Z. Saito, and Y. Matsunaga, “Resistivity structure and geochemistry of the Jigokudani Valley hydrothermal system, Mt. Tateyama Japan,” J. of Volcanology and Geothermal Research, Vol.325, pp. 15-26, doi: 10.1016/j.jvolgeores.2016.06.010, 2016.
-  R. Yoshimura, Y. Ogawa, Y. Yukutake, W. Kanda, S. Komori, H. Hase, T. Goto, R. Honda, M. Harada, T. Yamazaki, M. Kamo, S. Kawasaki, T. Higa, T. Suzuki, Y. Yasuda, M. Tani, and Y. Usui, “Resistivity characterisation of Hakone volcano, Central Japan, by three-dimensional magnetotelluric inversion,” Earth, Planets and Space, Vol.70, Issue 1, Article No.66, doi: 10.1186/s40623-018-0848-y, 2018.
-  K. Mannen, T. Tanada, A. Jomori, T. Akatsuka, G. Kikugawa, Y. Fukazawa, H. Yamashita, and K. Fujimoto, “Source constraints for the 2015 phreatic eruption of Hakone volcano, Japan, based on geological analysis and resistivity structure,” Earth, Planets and Space, Vol.71, Issue 1, Article No.135, doi: 10.1186/s40623-019-1116-5, 2019.
-  K. Aizawa, “Recent Progress in Electromagnetic Observations for Volcanology,” Bulletin of the Volcanological Society of Japan, Vol.61, No.2, pp. 345-365, doi: 10.18940/kazan.61.2_345, 2016 (in Japanese).
-  M. Ban and N. Takaoka, “Evolutionary history of the Nasu volcano group, Northeast Japan arc,” J. of Mineralogy, Petrology and Economic Geology, Vol.90, No.6, pp. 195-214, doi: 10.2465/ganko.90.195, 1995 (in Japanese).
-  T. Yamamoto and M. Ban, “Geological Map of Nasu Volcano,” Geological Survey of Japan, 1997 (in Japanese).
-  M. Takahashi, “9. Nasu Volcano – Lava dome erupted during the Muromachi period,” M. Takahashi and T. Kobayashi (Eds.), “Volcanoes in the Tohoku – Field Guide Japanese Volcano 4,” pp. 139-156, Tsukiji Shokan, 1999 (in Japanese).
-  Geospatial Information Authority of Japan, “1:10,000 volcano basic map Nasudake,” 1990 (in Japanese).
-  T. Suzuki, “Tephrochronological Study on Nasu Volcano,” Bulletin of the Volcanological Society of Japan, Vol.37, No.5, pp. 251-263, doi: 10.18940/kazan.37.5_251, 1992 (in Japanese).
-  T. Yamamoto, “Eruptive history of Nasu-Chausudake volcano, NE Japan, based on tephrostratigraphy,” The J. of the Geological Society of Japan, Vol.103, No.7, pp. 676-691, doi: 10.5575/geosoc.103.676, 1997 (in Japanese).
-  T. Tanada, H. Ueda, M. Nagai, and M. Ukawa, “NIED’s V-net, the Fundamental Volcano Observation Network in Japan,” J. Disaster Res., Vol.12, No.5, pp. 926-931, doi: 10.20965/jdr.2017.p0926, 2017.
-  National Institute for Earth Science and Disaster Resilience, “Nasudake,” Report of Coordinating Committee for Prediction of Volcanic Eruption, No.145, Japan Meteorological Agency, 2019 (in Japanese).
-  Japan Meteorological Agency, “Nasudake,” Report of Coordinating Committee for Prediction of Volcanic Eruption, No.145, Japan Meteorological Agency, 2019 (in Japanese).
-  Nasudake Volcano Disaster Prevention Council, “Nasu volcano eruption caution level introduction review committee report, Nasu Town,” 79pp., 2009.
-  B. R. Spies, and F. C. Frischknecht, “5. Electromagnetic Sounding,” M. N. Nabighian (Ed.), “Electromagnetic Methods in Applied Geophysics: Vol.2, Application, Parts A and B,” pp. 285-386, Society of Exploration Geophysicists, doi: 10.1190/1.9781560802686.ch5, 1991.
-  S. C. Constable, R. L. Parker, and C. G. Constable, “Occams’ inversion: A practical algorithm for generating smooth models from electromagnetic sounding data,” Geophysics, Vol.52, Issue 3, pp. 289-300, doi: 10.1190/1.1442303, 1987.
-  T. Uchida and Y. Sasaki, “Stable 3D Inversion of MT Data and its Application to Geothermal Exploration,” Exploration Geophysics, Vol.37, Issue 3, pp. 223-230, doi: 10.1071/EG06223, 2006.
-  W. Kanda, Y. Tanaka, M. Utsugi, S. Takakura, T. Hashimoto, and H. Inoue, “A preparation zone for volcanic explosions beneath Naka-dake crater, Aso volcano, as inferred from magnetotelluric surveys,” J. of Volcanology and Geothermal Research, Vol.178, Issue 1, pp. 32-45, doi: 10.1016/j.jvolgeores.2008.01.022, 2008.
-  Y. Yamaya, P. K. B. Alanis, A. Takeuchi, J. M. Cordon, Jr., T. Mogi, T. Hashimoto, Y. Sasai, and T. Nagao, “A large hydrothermal reservoir beneath Taal Volcano (Philippines) revealed by magnetotelluric resistivity survey: 2D resistivity modeling,” Bulletin of Volcanology, Vol.75, Issue 7, Article No.729, doi: 10.1007/s00445-013-0729-y, 2013.
-  P. Piña-Varas, J. Ledo, P. Queralt, A. Marcuello, F. Bellmunt, R. Hidalgo, and M. Messeiller, “3-D Magnetotelluric Exploration of Tenerife Geothermal System (Canary Islands, Spain),” Surveys in Geophysics, Vol.35, Issue 4, pp. 1045-1064, doi: 10.1007/s10712-014-9280-4, 2014.
-  Y. Kiyosu and Y. Okamoto, “Variation in fumarolic H2 gas and volcanic activity at Nasudake in Japan,” J. of Volcanology and Geothermal Research, Vol.80, Issues 1-2, pp. 27-37, doi: 10.1016/S0377-0273(97)00039-5, 1998.
This article is published under a Creative Commons Attribution-NoDerivatives 4.0 International License.