WEKO3
アイテム
Evolution of Mount Fuji, Japan: Inference from drilling into the subaerial oldest volcano, pre-Komitake
https://nied-repo.bosai.go.jp/records/4778
https://nied-repo.bosai.go.jp/records/47783fa8aaf7-c787-409d-ae29-c04864dfc6ca
| Item type | researchmap(1) | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 公開日 | 2023-03-30 | |||||||||||||||||
| タイトル | ||||||||||||||||||
| 言語 | en | |||||||||||||||||
| タイトル | Evolution of Mount Fuji, Japan: Inference from drilling into the subaerial oldest volcano, pre-Komitake | |||||||||||||||||
| 著者 |
Mitsuhiro Yoshimoto
× Mitsuhiro Yoshimoto
× Toshitsugu Fujii
× Takayuki Kaneko
× Atsushi Yasuda
× Setsuya Nakada
× Akikazu Matsumoto
|
|||||||||||||||||
| 抄録 | ||||||||||||||||||
| 内容記述タイプ | Other | |||||||||||||||||
| 内容記述 | A buried, old volcanic body (pre-Komitake Volcano) was discovered during drilling into the northeastern flank of Mount Fuji. The pre-Komitake Volcano is characterized by hornblende-bearing andesite and dacite, in contrast to the porphyritic basaltic rocks of Komitake Volcano and to the olivine-bearing basaltic rocks of Fuji Volcano. K-Ar age determinations and geological analysis of drilling cores suggest that the pre-Komitake Volcano began with effusion of basaltic lava flows around 260 ka and ended with explosive eruptions of basaltic andesite and dacite magma around 160 ka. After deposition of a thin soil layer on the pre-Komitake volcanic rocks, successive effusions of lava flows occurred at Komitake Volcano until 100 ka. Explosive eruptions of Fuji Volcano followed shortly after the activity of Komitake. The long-term eruption rate of about 3 km3/ka or more for Fuji Volcano is much higher than that estimated for pre-Komitake and Komitake. The chemical variation within Fuji Volcano, represented by an increase in incompatible elements at nearly constant SiO2, differs from that within pre-Komitake and other volcanoes in the northern Izu-Bonin arc, where incompatible elements increase with increasing SiO2. These changes in the volcanism in Mount Fuji may have occurred due to a change in regional tectonics around 150 ka, although this remains unproven. c 2010 Blackwell Publishing Asia Pty Ltd. | |||||||||||||||||
| 言語 | en | |||||||||||||||||
| 書誌情報 |
en : Island Arc 巻 19, 号 3, p. 470-488, 発行日 2010-09 |
|||||||||||||||||
| ISSN | ||||||||||||||||||
| 収録物識別子タイプ | EISSN | |||||||||||||||||
| 収録物識別子 | 1440-1738 | |||||||||||||||||
| DOI | ||||||||||||||||||
| 関連識別子 | 10.1111/j.1440-1738.2010.00722.x | |||||||||||||||||
