Geologic descriptionThe Kulik Kopper prospect consists of pyrite- and chalcopyrite-bearing quartz veins which crosscut the Early Jurassic Talkeetna Formation that consists mainly of volcanic and volcaniclastic rocks (Riehle and others, 1993). These rocks are propylitically altered near the veins. Tertiary plutons containing disseminated pyrite crop out in the drainage basin a few 100 yards south of the prospect. The pluton is marked by phyllic alteration. Samples collected by Church, Riehle, and Goldfarb (1993) contain up to 1,000 parts per million (ppm) copper, 340 ppm zinc, and 2 ppm silver. Several prospect pits were dug by George Pfaff in 1966 over an area of several acres. |
Geologic map unit |
(-154.892979185123, 58.9112072349385) |
Mineral deposit model |
Polymetallic vein (Cox and Singer, 1986; model 22c). |
Mineral deposit model number |
22c |
Age of mineralization |
Lower Jurassic or younger, the pyrite- and chalcopyrite-bearing quartz veins cut the Early Jurassic Talkeetna Formation. |
Alteration of deposit |
The volcanic and volcaniclastic rocks are propylitically altered near the veins; the pluton is marked by phyllic alteration. |