Hydrothermal system in the Tatun Volcano Group, northern Taiwan, inferred from crustal resistivity structure by audio-magnetotellurics

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Title:	Hydrothermal system in the Tatun Volcano Group, northern Taiwan, inferred from crustal resistivity structure by audio-magnetotellurics
Authors:	趙丰;Komori, Shogo;Utsugi, Mitsuru;Kagiyama, Tsuneomi;Inoue, Hiroyuki;Chen, Chang-Hwa;Chiang, Hsieh-Tang;Chao, Benjamin Fong;Yoshimura, Ryokei;Kanda, Wataru
Contributors:	地球科學學院地球科學學系
Keywords:	4. Solid earth sciences;Atmospheric Sciences;Biogeosciences;Earth and Environmental Science;Earth Sciences;Flow system;Geophysics/Geodesy;Hydrogeology;Planetology;Spatial distribution;Volcanoes
Date:	2014-12-01
Issue Date:	2026-04-23 11:35:36 (UTC+8)
Publisher:	Springer Open;Berlin/Heidelberg: Springer Science and Business Media LLC
Abstract:	摘要： The present study proposes an improved conceptual model for the hydrothermal system in the Tatun Volcano Group in northern Taiwan. In the study, audio-magnetotellurics (AMT) surveys were conducted to reveal the spatial distribution of resistivity, which is highly sensitive to fluids and hydrothermal alteration. By combining the obtained resistivity structure with other geophysical and geochemical evidence, the following hydrothermal system was inferred. Beneath Chishinshan, vapor-dominant hydrothermal fluids, supplied from a deeper part, are maintained in a low to relatively low resistivity region (5 to 20 Ω m) that is covered by a clay-rich cap, represented by an upper extremely low resistivity layer. Fluid ascent is suggested by a pressure source and clustered seismicity. Exsolved gases result in fumarolic areas, such as Siao-you-keng, while mixing of gases with shallow groundwater forms a shallow flow system of hydrothermal fluids in the Matsao area, represented by a region of less than 10 Ω m. The fumarole in the Da-you-keng area originates from vapor-dominant hydrothermal fluids that may be supplied from a deeper part beneath Cing-tian-gang, suggested by a pressure source and low to relatively low resistivity. Horizontally extended vapor-bearing regions also suggest the possibility of future phreatic eruptions. The proposed conceptual model may provide clues to detecting precursors of potential volcanic activity. 其他題名： Prog. in Earth and Planet. Sci 出版者： Berlin/Heidelberg: Springer Science and Business Media LLC 出版日期： 2014-10-11 出處： Progress in Earth and Planetary Science, 2014-10, Vol.1 (1), p.20-, Article 20 資源來源： Publicly Available Content Database 版權： Komori et al.; licensee Springer. 2014. This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License ( ), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. 版權： The Author(s) 2014 識別號： ISSN: 2197-4284 識別號： EISSN: 2197-4284 識別號： DOI: 10.1186/s40645-014-0020-7
Appears in Collections:	[Department of Earth Sciences ] journal & Dissertation

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