Occurrence and chemical composition of tourmaline in pegmatite at Nakanosawa quarry in Imakane town, southwest Hokkaido.

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Bibliographic Information

Other Title
  • 西南北海道、今金町中ノ沢採石場周辺におけるペグマタイト産電気石の産状と化学組成

Abstract

Tourmaline occurs in the pegmatite veins at Nakanosawa Quarry and Tanekawa Shimo-Hakai forest road at the northwest Imakane-cho, southwestern Hokkaido. It is assumed to be same in origin such as granitic magma exposed nearby, while their modes of occurrences and chemical compositions are largely different each other. Based on the field survey at outcrops, microscopic observation and chemical compositon by EPMA, we discussed about their characteristics and the formation process in this report. It may be summarized as follows; needle shape aluminum-rich tourmaline from Nakanosawa might be formed by Aluminum transfer due to the quenching and reaction of pegmatite veins with host pelitic rocks, while that from Shimo-Hakai could be crystallized as almost pure iron tourmaline (schol) and large massive crystal aggregates by slow cooling process.

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Details 詳細情報について

  • CRID
    1390001205545342336
  • NII Article ID
    130004601272
  • DOI
    10.14824/jakoka.2009.0.112.0
  • Text Lang
    ja
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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