Fe-Ti Oxide Minerals in the Matsumae Plutonic Rocks, Southwestern Hokkaido, Japan

機関リポジトリ (HANDLE) 被引用文献1件 オープンアクセス

この論文をさがす

説明

The Matsumae plutonic rocks, consisting of ultramafic cumulates to adamellite, are divided into three types in terms of the assemblage of Fe-Ti oxide minerals; Type I is characterized by the presence of magnetite and hemo-ilmenite, Type II by the presence of magnetite and absence of hemo-ilmenite, and Type III by the absence of magnetite. Chemistry of Fe-Ti oxide minerals suggests that origin of these types is ascribed to the dirrerence in oxidation state of magma, i.e. Type I is the highest in fO2, while Type III is the lowest. However, these differences in fO2 do not strictly correlate with the variation of assumed fH2O. Some rocks of Type II may represent an original redox state of the Matsumae plutonic magma. The Type I rocks were probably oxidized mainly in the magma chamber, whereas the Type III rocks may be reduced. Since some of the hornblendite show mixed facies of Types I and II, incorporation of less oxidized magma into the oxidized magma chamber may have occurred in early stages of crystallization. Redox state of the Matsumae plutonic magma is considered to be affected by such magma incorporation.

収録刊行物

被引用文献 (1)*注記

もっと見る

詳細情報 詳細情報について

  • CRID
    1050001338997515392
  • NII論文ID
    120001152039
  • HANDLE
    2115/36733
  • ISSN
    00183474
  • 本文言語コード
    en
  • 資料種別
    departmental bulletin paper
  • データソース種別
    • IRDB
    • CiNii Articles

問題の指摘

ページトップへ