伊豆半島西・南部地域火山岩類の岩石学的および化学的性質

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タイトル別名
  • Petrology and Chemistry of the Volcanic Rocks from the Western and Southern Part of Izu Peninsula, Central Japan
  • イズ ハントウ ニシ ナンブ チイキ カザンガンルイ ノ ガンセキガクテキ オ

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抄録

In the Izu Peninsula, Quaternary volcanoes arearranged apparently on two lines of NE direction. The volcanoes of Ida, Daruma, Tanaba, and Irozaki alkali basalts distribute on the west line in the peninsula (Fig.1). Most of the rocks of those volcanoes range in composition from basaltic andesite to andesite. Only a little alkaline basalt is represented in the southern end of the peninsula. Microscopically, the following rock types are distinguished: olivine-bearing two-pyroxene andesite (type Yd) for Darnma Volcano, olivine-augite andesite～basaltic andesite (IVc,IVb→c) for Ida Volcano, olivine-bearing hypersthene andesite (IId→c) for Tanada. Volcano, two-pyroxene andesite (Vc, Vd→c) for Tenshi and Jaishi Volcanoes, and olivine-augite basalt (IVb) of the Irozaki alkali basalts.

収録刊行物

  • 火山.第２集

    火山.第２集 21 (1), 11-29, 1976

    特定非営利活動法人 日本火山学会

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