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 |
|---|---|
| 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 1 |
| 外部発表 | はい |
ASJC Scopus subject areas
- Geochemistry and Petrology