2009
DOI: 10.1016/j.jvolgeores.2009.09.008
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Hydrothermal system beneath the crater of Tarumai volcano, Japan: 3-D resistivity structure revealed using audio-magnetotellurics and induction vector

Abstract: Audio-magnetotelluric (AMT) measurements were recorded in the crater area of Tarumai volcano, northeastern Japan. This survey brought the specific structures beneath the lava dome of Tarumai volcano, enabling us to interpret the relationship between the subsurface structure and fumarolic activity in the vicinity of a lava dome. Three-dimensional resistivity modeling was performed to achieve this purpose. The measured induction vectors pointed toward the center of the dome, implying the topographic effect. Howe… Show more

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Cited by 16 publications
(9 citation statements)
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“…The model from Fig. 5A is supported by the tomographic resistivity results of Yamaya et al (2009). Tarumae dome is isolated from the deep part of the magmatic conduit by solidification and strengthening of its crust.…”
Section: Explanation For Different 3 He/ 4 He Ratios Between Hot Sprisupporting
confidence: 53%
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“…The model from Fig. 5A is supported by the tomographic resistivity results of Yamaya et al (2009). Tarumae dome is isolated from the deep part of the magmatic conduit by solidification and strengthening of its crust.…”
Section: Explanation For Different 3 He/ 4 He Ratios Between Hot Sprisupporting
confidence: 53%
“…Considering that the Tarumae dome is internally highly fractured and altered by fumarolic activities (Hernandez et al, 2001a;Yamaya et al, 2009), penetration of meteoric water through the factures to the inside of the dome is likely. Furthermore, tomographic resistivity studies show the existence of an aquifer located between 50 m and 150 m under the dome (Yamaya et al, 2009).…”
Section: Radiogenic 4 He Addition From Superficial Aquifer In Degassementioning
confidence: 99%
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“…Conductive clay layers usually exhibit relatively low permeability (e.g., Jones and Dumas, 1993;Nurhasan et al, 2006;Aizawa et al, 2009a;Yamaya et al, 2009;Kanda et al, 2010). In particular, the top of such a clay layer can be sealed (i.e., impermeable), such that in the subsurface, any shallow, cold groundwater do not become wellmixed with deep, hot hydrothermal waters (Aizawa et al, 2009a).…”
Section: Interpretation Of Background Resistivity Structurementioning
confidence: 99%
“…Resistivity surveying is a powerful tool for studying subsurface geological structures (e.g., Ogawa et al, 1998;Matsushima et al, 2001;Srigutomo et al, 2008;Aizawa et al, 2008Aizawa et al, , 2009Yamaya et al 2009;Fikos et al, 2012) . We conducted a controlled-source audio-frequency magnetotelluric (CSAMT) survey (Sandberg and Hohmann, 1982;Milsom, 2003) over Toya caldera, southwestern Hokkaido, Japan, to in vestigate its subsurface structures (Fig.…”
Section: Introductionmentioning
confidence: 99%