Boulder Creek

The Boulder Creek is a molybdenum 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: Boulder Creek

Commodity

Primary: Molybdenum

Location

State: Alaska
District: Goodpaster

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

Not available

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Molybdenite
Gangue: Quartz

Comments

Comment (Geology): Age = Veins cut Cretaceous intrusion

Comment (Workings): Workings / Exploration = The Goodpaster region was first explored for placer gold in 1915. In the early 1930's, gold-bearing quartz veins were discovered in the upper Tibbs Creek area. From 1936 to 1941, the Blue Lead (BD003), Gray Lead (BD017), and Grizzly Bear (BD018) in the nearby Tibbs Creek area were mined for lode gold. The original base camp was on Summit Creek (Joesting, 1938).

Comment (Reference): Primary Reference = Joesting, 1942

Comment (Geology): Geologic Description = The area is characterized by rounded hills and flat-topped ridges (Thomas, 1970). The most prominent ridge is Black Mountain, which trends about 12 miles in a northerly direction and is underlain by Cretaceous granodiorite (Weber and others, 1978). A combination of augen gneiss, gneissic schist, and schist borders Black Mountain to the west. There is intense shearing and faulting in the contact between the metamorphic and intrusive rocks. Although most of the veining occurs in the shear zone, some is found in the intrusive rocks. This shear zone trends roughly N15E and dips 65 degrees NW. Veins are commonly 2 to 3 feet in width; some are as wide as 8 feet (Thomas, 1970). Molybdenite was observed sparingly in quartz veins in the granitic rock (Joesting, 1942). Doyon Limited (1998) documents the site as a Mo lode deposit. The Goodpaster region was first explored for placer gold in 1915. In the early 1930's, gold-bearing quartz veins were discovered in the nearby upper Tibbs Creek area. From 1936 to 1941, the Blue Lead (BD003), Gray Lead (BD017), and Grizzly Bear (BD018) in the nearby Tibbs Creek area were mined for lode gold. The original base camp was on Summit Creek, a tributary of Boulder Creek (Joesting, 1938) . Information regarding production or workings on Boulder Creek is not available.

Comment (Deposit): Model Name = Porphyry Mo? (Cox and Singer, 1986; model 21b)

Comment (Production): Production Notes = Information regarding production on Boulder Creek is not available.

Comment (Exploration): Status = Inactive

References

Reference (Deposit): Joesting, H.R., 1942, Strategic mineral occurences in interior Alaska: Alaska Territorial Department of Mines Pamphlet 1, 46 p.

Reference (Deposit): Doyon, Limited, 1998, Veta Prospects 1997 Volume 1: Doyon, Limited, unpublished report 98-10, 256 p. (Report held by Doyon, Limited, Fairbanks, Alaska.)

Reference (Deposit): Menzie, W.D., and Foster, H.L., 1979, Metalliferous and selected nonmetalliferous mineral resource potential in the Big Delta quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-529D, 61 p., 1 sheet, scale 1:250,000.

Reference (Deposit): Eberlein, G.D., Chapman, R.M., Foster, H.L., and Gassaway, J.S., 1977, Map and table describing known metalliferous and selected nonmetalliferous mineral deposits in central Alaska: U.S. Geological Survey Open-File Report 77-168-D, 132 p., 1 map, scale 1:1,000,000.

Reference (Deposit): Foster, H.L., Albert, N.R.D., Griscom, Andrew, Hessin, T.D., Menzie, W.D., Turner, D.L, and Wilson, F.H., 1979, The Alaskan Mineral Resource Assessment Program: Background information to accompany folio of geologic and mineral resource maps of the Big Delta quadrangle, Alaska: U.S. Geological Survey Circular 783, 19 p.

Reference (Deposit): Cobb, E.H., and Eberlein, G.D., 1980, Summaries of data on and lists of references to metallic and selected nonmetallic mineral deposits in the Big Delta and Tanacross quadrangles, Alaska: U.S. Geological Survey Open-File Report 80-1086, 77 p.

Reference (Deposit): Weber, F.R., Foster, H.L., Keith, T.E.C., Dusel-Bacon, C., 1978, Preliminary geologic map of the Big Delta quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-529A, 1 sheet, scale 1:250,000.

Reference (Deposit): Cobb, E.H., 1972, Metallic mineral resources map of the Big Delta quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-388, 1 sheet, scale 1:250,000.

Reference (Deposit): Joesting, H.R., 1938, Mining and prospecting in the Goodpaster region: Alaska Territorial Department of Mines , 2 p.

Reference (Deposit): Thomas, B.I., 1970, Reconnaissance of the gold-bearing quartz veins in the Tibbs Creek area, Goodpaster River, Big Delta quadrangle, central Alaska: U.S. Bureau of Mines Open-File Report 14-70, 12 p.

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