Figure 15. Alteration effects at the Fetais deposit:
calculated mass changes in Cu (in ppm). Major zones of Cu addition
occur within the rhyolite A footwall to the main orebody, and also
downdip of this, in the area of an inferred synvolcanic fault that
may have bounded a sulfide depositional graben. Holes FS-13 and LC-3
have not been sampled.
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