書誌事項
- タイトル別名
-
- Lava Flows of the 1986 Izu-Oshima Eruption
抄録
During the 1986 Izu-Oshima eruption, various types of lave flows were formed. Those are classified into four : coherent lava flows, overspill lava flows, clastogenic (rootless) lava flows and rheomorphic lava flows. Characteristics of each type are summarized as follows : a) Coherent lava flows. In the later stage of LCI lava flow, coherent lava was observed to be effused from C6 crater. b) Overspill lava flows. The summit eruptions formed a lava lake, from where LA I~IV lava flows spilt over and flowed down the slope of the cone. c) Clastogenic lava flows. Two clastogenic lava flows, LB I and LB III, were originated from high lava fountains from B fissure vents. Those show relict clast structures, covered by blocks of collapsed scoria cone. d) Rheomorphic lava flow. A rheomorphic lava flow, LB II, was observed to flow down from the scoria cone beside B7 crater two days after the eruption of B fissure vents. Chemical composition of LB II is uniform as SiO2=57wt%, though LBI, LBIII and most scoria falls from B craters show SiO2=54wt%, except for the earliest scoria fall showing SiO2=57wt%. This suggests that the lowest part of the scoria cone was welded and deformed, and squeezed up to the surface.
収録刊行物
-
- 火山.第2集
-
火山.第2集 33 (SPCL), S52-S63, 1988
特定非営利活動法人 日本火山学会
- Tweet
詳細情報 詳細情報について
-
- CRID
- 1390001206122627200
-
- NII論文ID
- 10007193882
- 110002988998
-
- ISSN
- 24330590
-
- 本文言語コード
- ja
-
- データソース種別
-
- JaLC
- CiNii Articles
-
- 抄録ライセンスフラグ
- 使用不可