number of downloads : ?
Title Transcription
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
Title Alternative
Petrology and geochemistry of pyroclastic rocks from the Masumizuhara pyroclastic flow deposit
File
language
eng
Attribute
Article
Author
Nishita, Haruna
Description
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.
Subject
Daisen Volcano
Misen Lava Dome
Masumizuhara Block and Ash flows
Thermobarometry
Journal Title
Earth science reports of Shimane University
Volume
37
Start Page
11
End Page
19
ISSN
13439774
Published Date
2020-03-25
NII Type
Departmental Bulletin Paper
Format
PDF
Text Version
出版社版
Gyoseki ID
e37846
OAI-PMH Set
Faculty of Science and Engineering