Geologic descriptionThe Copper Wonder prospect is in a strongly sheared basalt (Schmidt and others, 2002). A 2- to 3-foot-thick layer of specular hematite is exposed over a vertical distance of 20 feet in a shear zone. Chalcopyrite with minor pyrite and quartz, occurs as clots up to 4 inches wide. Malachite and azurite coatings are prominent in the altered, shear zone. Scattered specks of sulfides occur in the greenstone away from the shear zone (Capps, 1919 [692]). Three large open cuts expose the shear zone. |
Geologic map unit |
(-149.135722761391, 62.3278028886955) |
Mineral deposit model |
Basaltic Cu (Cox and Singer, 1986; model 23) |
Mineral deposit model number |
23 |
Alteration of deposit |
The shear zone material as well as the greenstone adjacent to the shear zone is described as altered, but the type of alteration is not specified (Capps, 1919 [B 692]). Local oxidation of chalcopyrite to azurite and malachite. |