Mn-rich mineral paragenesis in the Sanbagawa metamorphic rocks from the Kanto Mountains, Japan.

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  • 関東山地三波川変成岩中のＭｎに富んだ鉱物組み合わせについて
  • カントウ サンチ サンバガワ ヘンセイガン チュウ ノ Mn ニ トンダ コウブツ クミアワセ ニ ツイテ

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Abstract

Mn-rich mineral paragenesis containing Mn-winchite, Mn-aegirine-augite, and Mn-rich garnet (calderitic spessartine) is found in hematite-rich siliceous schists from the Sanbagawa metamorphic belt in the Kanto Mountains. Chemical composition of amphibole widely changes with compositional layers in a siliceous schist; Mn-winchite in aegirine-augite+garnet+hematite+quartz layer, actinolite in hematite+calcite+quartz layer, and Mn-cummingtonite in hematite+quartz layer.

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