Geochemical Study on Ground Water, Thermal Water and Ash Fall Collected Immediately after the 1977 Eruption of the Usu Volcano, Japan
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- MATSUO Sadao
- Department of Chemistry, Tokyo Institute of Technology
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- KUSAKABE Minoru
- Department of Chemistry, Tokyo Institute of Technology
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- CHIBA Hitoshi
- Department of Chemistry, Tokyo Institute of Technology
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- USHIKI Hisao
- Department of Chemistry, Tokyo Institute of Technology
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- OSSAKA Joyo
- Department of Inorganic Materials, Tokyo Institute of Technology
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- HIRABAYASHI Jun-ichi
- Department of Inorganic Materials, Tokyo Institute of Technology
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- ABIKO Tsutomu
- Department of Industrial Chemistry, Muroran Institute of Technology
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- NOTSU Kenji
- Department of Chemistry, Tsukuba University
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- OZAWA Takejiro
- Department of Environmental Chemistry, Saitama University
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- ARAMAKI Shigeo
- Earthquake Research Institute, University of Tokyo
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- SATO Kazuo
- Earthquake Research Institute, University of Tokyo
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- HAYASHI Tamotsu
- Faculty of Science and Technology, Sophia University
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- SATO Jun
- Department of Industrial Chemistry, Meiji University
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- FUJII Naoyuki
- Department of Earth Sciences, Kobe University
Bibliographic Information
- Other Title
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- 1977年有珠山噴火直後の地下水,温泉水および火山灰の地球化学的研究
- 1977ネン ウスザン フンカ チョクゴ ノ チカスイ オンセンスイ オヨビ
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Abstract
Emergent studies on some water and ash samples collected immediately after the August 7,1977 eruption of Usu volcano have been made by a joint group of geochemists. This paper reports a part of the results obtained for the samples collected in August and September. The items measured were temperature, pH, major and minor dissolved chemical components including radon, hydrogen and oxygen isotope ratios for ground water, thermal water around the Usu volcano and fumarolic condensates of the Showashinzan, the adjacent newer volcano to the Usu, chemical and mineral composition of ash including its soluble components. Through a short period of observation, we could not find any significant change in chemical and isotopic compositions of a variety of waters after the eruption. However, a rough idea of hydrothermal and hydrological situation around the Usu volcano has been obtained. In this comection, we set standing stations for water sampling and the observation through these stations has been still continued. Ash fall contained montmorillonite and chlorite. This fact indicates that clay minerals formed beneath the crater during the dormant period was expelled together with pumice originated from the fresh magma pertinent to this eruption. When the chemical composition of the water-soluble components of the ash is also taken into consideration, temperature of the coexisting gas phase with ash is suggested to be fairly high.
Journal
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- SECOND SERIES BULLETIN OF THE VOLCANOLOGICAL SOCIETY OF JAPAN
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SECOND SERIES BULLETIN OF THE VOLCANOLOGICAL SOCIETY OF JAPAN 22 (4), 201-220, 1977
The Volcanological Society of Japan
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Details 詳細情報について
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- CRID
- 1390282681098637696
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- NII Article ID
- 110002994855
- 10003668800
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- NII Book ID
- AN10512786
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- ISSN
- 04534360
- 24330590
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- NDL BIB ID
- 1917500
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- CiNii Articles
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- Abstract License Flag
- Disallowed