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Title Transcription
カラスガセン ヨウガン ドーム オヨビ ソレニ カンレンスル カサイリュウ タイセキブツ ノ ガンセキガクテキ コウブツカガクテキ ケンキュウ
Title Alternative
Petrology and mineral chemistry of the Karasugasen lava dome and associated pyroclastic flow deposits
File
language
eng
Attribute
Article
Author
Ito, Yutaka
Description
The Karasugasen lava dome is part of the Daisen – Hiruzen Volcanic complex and was the source of a large number of Block and Ash flows. Products directly overlie the Aira Tanzawa tephra (AT), and the majority of erupted material is preserved in three voluminous lobes to the south and southeast of Mt Daisen. Dacitic magmas with adakitic characteristics were sourced from a large magma chamber in the shallow crust crystallizing between 4 and 12 km depth, at temperatures between 803 and 920 ˚C and oxygen fugacities of Δlog +1.7 to +1.8 above the NNO buffer. Cores of magnesium rich orthopyroxene phenocrysts are not in equilibrium with the host dacite and may be a rare evidence for insipient mafic replenishment of the voluminous magma chamber beneath the Daisen Volcanic complex.
Subject
Daisen Volcano
Karasugasen Lava Dome
Sasaganaru Block and Ash flows
Thermobarometry
Journal Title
Earth science reports of Shimane University
Volume
37
Start Page
1
End Page
10
ISSN
13439774
Published Date
2020-03-25
NII Type
Departmental Bulletin Paper
Format
PDF
Text Version
出版社版
Gyoseki ID
e37845
OAI-PMH Set
Faculty of Science and Engineering