Geologic descriptionStratiform lenses and disseminations of sulfide minerals occur in mafic metavolcanic rocks and metasedimentary rocks of the Valdez Group; sulfide minerals include chalcopyrite, pyrite, pyrrhotite, and sphalerite (Winkler and others, 1981 [OFR 80-892-B]). The metavolcanic rocks probably represent ocean floor basalts that were accreted with the enclosing flysch of the Valdez Group (Winkler and others, 1981 [OFR 80-892-A]. |
Geologic map unit |
(-146.099312717384, 61.0020812412624) |
Mineral deposit model |
Cyprus massive sulfide (Cox and Singer, 1986; model 24a) |
Mineral deposit model number |
24a |
Age of mineralization |
Late Cretaceous; the host metavolcanic rocks probably represent ocean floor basalts that were accreted with the enclosing flysch of the Valdez Group (Winkler and others, 1981 [OFR 80-892-A]). |
Alteration of deposit |
Oxidation; the deposits are iron stained (Winkler and others, 1980 [OFR 80-892-B]). |