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Colp and Lee Prospect, Petersburg District, Wrangell-Petersburg Borough, Alaska, USA

Latitude: 57°5'54"N
Longitude: 132°48'32"W
Location: As described by Buddington (1929), this prospect is about 1.5 mile north-northeast of the mouth of Scenery Cove and just east of the tidal flat below the toe of the Baird Glacier. It is described as in a steep gully in this vicinity by Roehm (1945 [IR 195-37]). It is in the SE1/4 section 14, T. 55 S., R. 79 E. The prospect could not be found by Still and others (2002).
Geology: As described by Roehm (1945 [IR 195-37]), this prospect is a fracture zone over 100 feet wide that strikes N 70 W along a steep gully. It is intersected by another fracture zone that strikes N 80 E. The rocks in the vicinity consist of Paleocene or Cretaceous quartz diorite (Gehrels and Berg, 1992). The fracture zones contain small quartz masses and veins up to 12 inches thick with pyrite, galena, sphalerite, chalcopyrite, arsenopyrite, and free gold. Roehm (1945 [IR 195-37]) noted that while the veins and quartz masses are locally rich, they are probably too few and too far apart to be an economic deposit. One sample contained 0.02 ounce of gold per ton and 1.50 ounces of silver per ton. Buddington (1923) indicated that fracture zone was 140 feet wide and averaged about 0.145 ounce of gold per ton; the richest part was about 5 feet wide and contained about 0.774 ounce of gold per ton. The prospect could not be found by Still and others (2002).
Workings: None noted other than surface prospecting.
Age: Quartz veins cut Paleocene or Cretaceous quartz diorite.

Commodities (Major) - Ag, As, Au, Cu, Pb, Zn
Development Status: None
Deposit Model: Polymetallic quartz vein (Cox and Singer, 1986; model 22c).

References

Buddington, A.F., 1923, Mineral deposits of the Wrangell district: U.S. Geological Survey Bulletin 739-B, p. 51-75. Roehm, J.C., 1945, Preliminary report of investigations and itinerary of J. C. Roehm in the Wrangell and Petersburg precincts, Alaska: Alaska Territorial Department of Mines Itinerary Report 195-37, 13 p. Still, J.C., Bittenbender, P.E., Bean, K.W., and Gensler, E.G., 2002 Mineral assessment of the Stikine area, central Southeast Alaska: U.S. Bureau of Land Management Technical Report 51, 560 p.

Mineral List

Arsenopyrite
Chalcopyrite
Galena
Gold
Pyrite
Quartz
Sphalerite


7 entries listed. 7 valid minerals.

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Copyright © Jolyon Ralph and Ida Chau 1993-2011. Jobs in Alaska, USA Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 11th Jun 2011 21:29:13
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