Continuous Garnet Zoning under Increasing and Decreasing Temperature Conditions, Kwoiek Area, British Columbia, Canada

Abstract

Garnet porphyroblasts from five rocks, collected from within a 100-foot-square outcrop area in the Kwoiek area of British Columbia and differing only in the relative proportions of chlorite, staurolite, garnet, biotite, plagioclase, ilmenite, graphite, and quartz, were studied in detail with the electron microprobe. The assemblage of these five rocks can be considered to be divariant in Mn content and activity of water at any stage of the metamorphic history.

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