Porcupine Creek Occurrence, Hope Mining District, Kenai Peninsula Borough, Alaska, USAi

Regional Level Types
Porcupine Creek Occurrence	Occurrence
Hope Mining District	Mining District
Kenai Peninsula Borough	Borough
Alaska	State
USA	Country

Location: The occurrence is located a mile west of Porcupine Creek and three-quarters of a mile southeast of peak 3722. It is in the SE1/4 section 33, T. 3 N., R. 1 W., of the Seward Meridian, at an elevation of 3,000 feet. This is location S-212 of Jansons and others (1984). This location is accurate to within a quarter of a mile.
Geology: Mineralization consists of several quartz veins containing minor amounts of sulfide minerals. One vein in a small gulch is 1 to 3 feet wide; it contains calcite and minor arsenopyrite (Hoekzema and Sherman, 1983). The host rock is iron-stained slate on the footwall; foliation strikes N10E and dips 85E. The hanging wall is metasandstone. Several 1- to 3-inch-thick veins are located 200 to 300 feet south and 200 feet above the large vein. These smaller veins are hosted in graywacke and strike N75W and dip 85N. They contain considerable arsenopyrite and minor galena. The host rock is slate and graywacke of the Valdez Group of Late Cretaceous age (Nelson and others, 1985). Three samples assayed trace amounts of gold and as much as 0.2 ounce of silver per ton (Jansons and others, 1984).
Workings: There are no workings or improvements described in the literature. Three samples assayed trace amounts of gold and as much as 0.2 ounce of silver per ton (Jansons and others, 1984).
Age: Cretaceous or younger; the veins cut rocks of the Valdez Group of Late Cretaceous age.
Alteration: The slate in the footwall is iron-stained.

Commodities (Major) - Ag?, Au
Development Status: None
Deposit Model: Low-sulfide Au-quartz veins (Cox and Singer, 1986; model 36a)

Other Databases

Link to USGS - Alaska:	SR190

Other Regions, Features and Areas containing this locality

References