小値賀島単成火山群の火山地質 Geology of the Ojikajima Monogenetic Volcano Group

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Numerous cinder cones from Ojikajima monogenetic volcanic group are well-exposed by marine erosion that allows a detailed investigation of the proximal products. Observation of the exposures at sea cliffs and petrological study of the volcanic rocks revealed the formation process and the internal structure of cinder cones. These cones are divided into three types in terms of evolution: 1) scoria cone+lava flow, 2) spatter cone+lava flow, 3) maar,tuff-ring (phreato-magmatic phases)+scoria cones+lava flow. Four eruption styles of lava flow are found: 1) over flow from crater edge, 2) outflow from middle part of scoria cone with horseshoe-shaped collapse (intrusion of dike oblige from fissure), 3) without collapse, 4) outflow from middle part or basement (intrusion of dike parallel to fissure).

収録刊行物

  • 東北アジア研究 = Northeast Asian studies

    東北アジア研究 = Northeast Asian studies 3, 201-232, 1999-03-31

    東北大学東北アジア研究センター

各種コード

  • NII論文ID(NAID)
    110004822807
  • NII書誌ID(NCID)
    AA11158374
  • 本文言語コード
    JPN
  • 資料種別
    Departmental Bulletin Paper
  • ISSN
    13439332
  • データ提供元
    NII-ELS  IR 
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