Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 517-528 |
| Number of pages | 12 |
| Journal | Canadian Mineralogist |
| Volume | 21 |
| Issue number | 3 |
| Publication status | Published - 1983 Jan 1 |
| Externally published | Yes |
ASJC Scopus subject areas
- Geochemistry and Petrology