Lillie

The Lillie is a copper, molybdenum, lead, and tungsten 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

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Site Name

Primary: Lillie
Secondary: Unnamed (south of Dry Pass)

Commodity

Primary: Copper
Primary: Molybdenum
Primary: Lead
Primary: Tungsten

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: W skarn

Orebody

Not available

Structure

Not available

Alterations

Alteration Text: Contact metamorphic/metasomatic alteration with development of calcsilicate minerals in marble at periphery of the pluton at Dry Pass.

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Chalcopyrite
Ore: Scheelite
Ore: Pyrrhotite
Ore: Pyrite
Ore: Powellite
Ore: Molybdenite
Ore: Magnetite
Ore: Galena
Gangue: Marble
Gangue: Quartz

Comments

Comment (Reference): Primary Reference = Herreid and Kaufman, 1964

Comment (Deposit): Model Number = 14a, 18a, 18b, 18c, and 18d

Comment (Reserve-Resource): Reserves = None

Comment (Workings): Workings / Exploration = Old prospects and occurrences on which little recent work apparently has been done beyond minor surface exploration and a short adit (said to be 100 feet long). Twenty-seven lode claims were staked in the area in 1961 (U. S. Bureau of Mines, 1980) and an even bigger block is shown on the 1995 Alaska land status map. Extent and type of work done on these claims in recent years is unknown.

Comment (Commodity): Gangue = Calcsilicate minerals

Comment (Exploration): Status = Active?

Comment (Geology): Age = Cretaceous based on probable genetic relationship to nearby pluton.

Comment (Production): Production Notes = None

Comment (Deposit): Model Name = Various types of skarn deposits (Cox and Singer, 1986; models 14a, 18a, 18b, 18c, and 18d).

Comment (Geology): Geologic Description = Several mineral deposits occur near the contact of a Cretaceous quartz monzonite pluton bordered by Cretaceous marble metamorphosed from Silurian Heceta Limestone (Brew, and others, 1984); all the deposits are probably related to this contact zone. At the Lillie prospect (Denny, 1961; Herreid and Kaufman, 1964) a band of tactite about 100 feet wide in diorite contains joint coatings and disseminated irregular masses, less than a half-inch in diameter, of molybdenite and subordinate powellite, chalcopyrite, pyrite, and magnetite. At another unnamed occurrence, a band of magnetite about 3 feet wide follows the contact between a diorite dike and marble. At another, samples of hornfels, marble, and diorite collected from a dump outside a short caved adit contain variable amounts of magnetite, molybdenite, chalcopyrite, pyrrhotite, pyrite, and galena. Quartz veins near the adit contain scheelite and a 5-foot chip sample of the vein contained 1.4% WO3. Quartz-rich rock near a marble-diorite contact also carry disseminated scheelite. These and additional showings of molybdenite, pyrite, and chalcopyrite in the contact zone of the pluton suggest the possibility of a porphyry copper or molybdenum deposit as well as more contact metamorphic deposits in the vicinity. Also see 'Workings/exploration'.

References

Reference (Deposit): Herreid, G.H., and Kaufman, M. A., 1964, Geology of the Dry Pass area, southeastern Alaska: Alaska Division of Mines and Minerals Geologic Report 7, 12 p.

Reference (Deposit): Denny, R.L., 1961, Lillie, Hawkins, and Eichner Moly prospect (Koscuisko Island): Alaska Territorial Department of Mines Prospect Evaluation 117-7, 3 p

Reference (Deposit): Grybeck, D.J., Berg, H.C., and Karl, S.M., 1984, Map and description of the mineral deposits in the Petersburg and eastern Port Alexander quadrangles: U.S. Geological Survey Open-File Report 84-837, 86 p., 1 sheet, scale 1:250,000.

Reference (Deposit): Brew, D. A., Ovenshine, A. T., Karl, S. M., and Hunt, S. J., 1984, Preliminary reconnaissance geologic map of the Petersburg and parts of the Port Alexander and Sumdum 1:250,000 quadrangles, southeastern Alaska: U.S. Geological Survey Open-File Report 84-405, 43 p., 2 sheets, scale 1:250,000.

Reference (Deposit): U.S. Bureau of Mines, 1980, Claim map, Petersburg quadrangle, Alaska: U.S. Bureau of Mines Map 117, 1 sheet, scale 1:250,000.

Reference (Deposit): Herreid, G.H., and Kaufman, M. A., 1964, Geology of the Dry Pass area, southeastern Alaska: Alaska Division of Mines and Minerals Geologic Report 7, 16 p.

Reference (Deposit): Cobb, E.H., 1978, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Petersburg quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-870, 53 p.

Reference (Deposit): Cobb, E.H., 1972, Metallic mineral resources map of the Petersburg quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-415, 1 sheet, scale 1:250,000.

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