Cristobalite from the Abuta Mine in Hokkaido, Japan

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Other Title
  • 北海道虻田鉱山のクリストバル石

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Description

Cristobalite and opal are contained in the wall-rocks (tuff and agglomerate) of the native sulphur and iron sulphides ore deposits, and in the disseminated limonite (goethite) ore of the Abuta Mine in south-western Hokkaido, Japan.<BR>These are not found in the massive iron sulphides ore and moss-limonite (goethite) ore that always contains quartz as silica minerals. The x-ray diffraction data show that the cristobalite is mostly α-(low) type. Its hexagonal platy crystal can be found in the electromicrograph.<BR>It is considered that the cristobalite has been formed as a secondary mineral from opal which is one of the hydrothermal alteration minerals-alunite, kaolin, montmorillonite, anatase?, pyrite, marcasite, native sulphur, etc. Cristobalite is also found in the wall-rocks of the native sulphur ore deposits of the Tokusyumbetu Mine and in the clay under the moss-limonite (goethite) ore deposit of the Kuttyan Mine.

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Details 詳細情報について

  • CRID
    1390001206525389184
  • NII Article ID
    130003437064
  • DOI
    10.2465/gkk1952.3.738
  • ISSN
    18837018
    04541146
  • Text Lang
    ja
  • Data Source
    • JaLC
    • Crossref
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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