Geology at the Hidden Creek mine, Anyox, showing the several zones of mineralization. The pits represent collapsed underground workings. Rocks near the mineralized zones have been strongly altered to biotite-chlorite-sericite-quartz Fe sulfide assemblages, and are not readily identifiable in the field as being of volcanic or sedimentary origin. Parts of the alteration zones are highly silicified and appear cherty. Map courtesy of TVI Pacific and R. Macdonald.

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