GRUNERITE FROM THE SHINYAMA ORE DEPOSIT, KAMAISHI MINE, JAPAN.

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Abstract

Most of the clinopyroxene in the clinopyroxene skarn that contains the 4D copper orebody of the Shinyama ore deposit (Japan) was altered to amphibole owing to late-stage decrease of temperature. Two amphibole species are found: Ca-amphibole and cummingtonite-grunerite; the latter is rarely found in skarn-type ore deposits. In exoskarns derived from limestone, the following zonal arrangement is observed from the limestone to the igneous rock: cummingtonite-grunerite skarn, Ca-amphibole skarn, (clinopyroxene skarn), and garnet skarn. This arrangement is attributable to the increase in the chemical potential of CO//2 toward the limestone.

Original languageEnglish
Pages (from-to)517-528
Number of pages12
JournalCanadian Mineralogist
Volume21
Issue numberpt 3
Publication statusPublished - 1983 Aug
Externally publishedYes

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ASJC Scopus subject areas

  • Geochemistry and Petrology

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