The Venitia is a molybdenum and gold mine located in Alaska.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Mine Info
Satelite View
MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.
Venitia MRDS details
Site Name
Primary: Venitia
Secondary: Black Swan
Secondary: Laundromat
Secondary: Jim's cut
Commodity
Primary: Molybdenum
Primary: Gold
Secondary: Copper
Location
State: Alaska
District: Ketchikan
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Prospect
Operation Type: Unknown
Years of Production:
Organization:
Significant:
Physiography
Not available
Mineral Deposit Model
Model Name: Porphyry Mo, low-F
Orebody
Not available
Structure
Not available
Alterations
Alteration Text: Local oxidation of copper minerals (Jim's cut).
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Chalcopyrite
Ore: Malachite
Ore: Molybdenite
Ore: Pyrite
Comments
Comment (Deposit): Model Name = Porphyry Mo, low-F (Jim's cut) (Cox and Singer, 1986; model 21b)
Comment (Reference): Primary Reference = Maas and others, 1995
Comment (Geology): Age = Probably Cretaceous (Jim's cut).
Comment (Workings): Workings / Exploration = Workings dating from the early 1900s have largely been covered by housing or commercial development, or plugged. At Jim's cut, a 68-foot-long sample across disseminated sulfide mineralization in the diorite contained 163 ppb Au, 2632 ppm Cu, and 115 ppm Mo (Maas and others, 1995, p. 201).
Comment (Geology): Geologic Description = This part of Revillagigedo Island is underlain mainly by marine, andesitic or basaltic volcanic rocks and interbedded pelitic sedimentary rocks that are intruded by Cretaceous stocks, sills, and dikes of feldspar-porphyritic granodiorite, and by a stock and probably related plugs of Tertiary gabbro (Berg and others, 1988). The strata were regionally metamorphosed to greenschist-grade phyllite and semischist in Late Cretaceous time. They subsequently were contact metamorphosed to hornblende hornfels: locally, near some of the Cretaceous granodiorite contacts, and, more widely, peripheral to the Tertiary gabbro. The premetamorphic age range of the strata is uncertain. Berg and others (1988) note that they closely resemble Upper Jurassic to mid-Cretaceous flysch and volcanic rocks nearby on Gravina Island. The country rocks are cut by a high-angle fault along Tongass Narrows that displays about 4 miles of right-lateral offset. According to U.S. Bureau of Mines claim records (1977), the Venitia prospect, which appears to be in hornfelsed strata near the contact of a Tertiary gabbro stock, reportedly was staked for gold. No other information about this prospect has been made public. The following three occurrences were examined by Maas and others (1995, loc. 281-283), who named them either from U.S. Bureau of Mines claim records, or, informally, for local landmarks. Loc. 281 (Maas and others, p. 201): Black Swan. Samples of unidentified rock contained up to 555 ppm Cu. Loc. 282. Laundromat. A sample of unidentified rock contained 11 ppb Au. There is a 15-foot adit on this property. Loc. 283: Jim's cut. This occurrence, discovered during Maas and others' investigation, was exposed by residential and commercial development along the highway southeast of Ketchikan. It consists of diorite containing disseminated pyrite, chalcopyrite, molybdenite, and malachite that is exposed for 180 feet in a 12-foot deep cut in the back yards of several new houses. A 68-foot-long sample across disseminated sulfide mineralization in the diorite contained 163 ppb Au, 2632 ppm Cu, and 115 ppm Mo, Maas and others (1995, p. 201) interpret this occurrence as a porphyry molybdenum-type deposit.
References
Reference (Deposit): U.S. Bureau of Mines, 1977, Claim map, Ketchikan quadrangle: U.S. Bureau of Mines Map 120, scale 1:250,000.
Reference (Deposit): Elliott, R.L., Berg, H.C., and Karl, Susan, 1978, map and table describing metalliferous and selected nonmetalliferous mineral deposits, Ketchikan and Prince Rupert quadrangles, Alaska: U.S. Geological Survey Open-file Report, 78-73-B,17 p., scale 1:250,000.
Reference (Deposit): Berg, H.C., Elliott, R.L., and Koch, R.D., 1988, Geologic map of the Ketchikan and Prince Rupert quadrangles, southeastern Alaska: U.S. Geological Survey Mineral Investigations Series Map MF-1807,27 p., scale 1:250,000.
Reference (Deposit): Maas, K.M., Bittenbender, P E., and Still, J.C., 1995, Mineral investigations in the Ketchikan mining district, southeastern Alaska: U.S. Bureau of Mines Open-File Report 11-95, 606 p.
The Top Ten Gold Producing States
These ten states contributed the most to the gold production that built the West from 1848 through the 1930s. The Top Ten Gold Producing States.
