Unnamed (near head of Hope Creek)

Occurrence, Inactive

Commodities and mineralogy

Main commodities F
Other commodities Cu; Mo; Pb; REE; Sb; W; Zn
Ore minerals allanite; arsenopyrite; chalcopyrite; fluorite; galena; malachite; marcasite; molybdenite; pyrite; pyrrhotite; scheelite; stibnite; sphalerite
Gangue minerals rutile

Geographic location

Quadrangle map, 1:250,000-scale CI
Quadrangle map, 1:63,360-scale B-6
Latitude 65.418
Longitude -146.502
Nearby scientific data Find additional scientific data near this location
Location and accuracy Occurrence is sample number 025, in Holm (1973). The sample is located on the north headwater fork of Hope Creek, NW1/4 SW1/4 sec. 22, T. 7 N., R. 6 E.

Geologic setting

Geologic description

The occurrence is a 15-cm-wide fluorite vein in a fine-grained quartz- and opal-bearing breccia zone in a contact phase of biotite granite. Minor sulfide mineralization occurs in carbonate-bearing metamorphic rocks at the head of Hope Creek. Sulfides present are pyrrhotite, marcasite, and sphalerite with blebs of chalcopyrite, pyrite and arsenopyrite. None of these minerals occurs in quantities of economic significance. Samples of granite taken near the head of Hope Creek contained trace to small amounts of allanite (?), fluorite, galena, malachite, molybdenite, pyrite, pyrrhotite, rutile, scheelite and stibnite (Holm, 1973). Biotite from this granite has been dated at 59.5 +/- 1.8 m.a. by the K/Ar method (Holm, 1973).
Geologic map unit (-146.504476979908, 65.4176012742801)
Age of mineralization The principal occurrence is a fluorite vein in a fine-grained quartz- and opal-bearing breccia zone in a contact phase of biotite granite. The biotite in the granite has been dated at 59.5 +/- 1.8 m.a. by the K/Ar method (Holm, 1973).

Production and reserves

Workings or exploration Surface samples taken.
Indication of production None

References