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タイトルヨミ
マスミズハラ カサイリュウ タイセキブツ ニ オケル ガンセキガクテキ オヨビ チキュウ カガクテキ ケンキュウ
タイトル別表記
Petrology and geochemistry of pyroclastic rocks from the Masumizuhara pyroclastic flow deposit
ファイル
言語
英語
属性
論文
著者
西田 華菜
内容記述(抄録等)
Daisen Volcano is located in the San-in district, southwest Japan. The volcano is a large composite cone with several amalgamated eruptive centres which are Hiruzen, Karasugasen, and Misen. A thick apron of pyroclastic material surrounds the entire volcanic complex. The erupted material from Daisen volcano is divided into an Older group and a Younger group. The Masumizuhara pyroclastic flow deposits are sourced from the Misen lava dome and are part of the Younger group. Pyroclastic rocks were analysed by X-ray fluorescence spectrometry (XRF) and all samples are classified as adakitic, medium-K dacites. Mineral and glass composition was determined by electron probe microanalyzer (EPMA) to evaluate magma storage conditions and to characterize the magmatic system of Mt. Daisen during its youngest eruptive cycle. Pressure, temperature, water content and oxygen fugacity range from 126 to 201 MPa, 843 to 864 ˚C, 5.0 to 7.7 wt % and +1.6 to +2.0 log units above the nickel-nickel oxide (NNO) buffer, respectively.
主題
Daisen Volcano
Misen Lava Dome
Masumizuhara Block and Ash flows
Thermobarometry
掲載誌名
島根大学地球科学研究報告
37
開始ページ
11
終了ページ
19
ISSN
13439774
発行日
2020-03-25
資料タイプ
紀要論文
ファイル形式
PDF
著者版/出版社版
出版社版
業績ID
e37846
部局
総合理工学部