抄録
Most of the clinopyroxene in the clinopyroxene skarn containing the 4D copper orebody of the Shinyama deposit was altered to Ca-amphibole and cummingtonite-grunerite owing to late-stage T decrease. Microprobe analyses indicate that most of the amphibole is cummingtonite-grunerite, generally considered rare in skarns, and that the Mg/(Mg + Fe) mole fractions of Ca-amphibole and cummingtonite-grunerite are 0.24-0.38 and 0.27-0.33, respectively. A zonal arrangement is observed from limestone to igneous rock: cummingtonite-grunerite skarn, Ca-amphibole skarn, (clinopyroxene skarn) and garnet skarn. This zonal arrangement is attributed to the increase of XCO2 towards the limestone.-L.C.C.
本文言語 | English |
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ページ(範囲) | 517-528 |
ページ数 | 12 |
ジャーナル | Canadian Mineralogist |
巻 | 21 |
号 | 3 |
出版ステータス | Published - 1983 1月 1 |
外部発表 | はい |
ASJC Scopus subject areas
- 地球化学および岩石学