Boundary Creek Occurrence

The Boundary Creek Occurrence is a molybdenum and silver 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.

Site Name

Primary: Boundary Creek Occurrence

Commodity

Primary: Molybdenum
Primary: Silver
Secondary: Copper

Location

State: Alaska
District: Juneau

Land Status

Land ownership: National Forest
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
Discovery Year: 1967
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

Not available

Mineral Deposit Model

Not available

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Not available

Analytical Data

Analytical Data: USGS CIRC 615, P. 15, TABLE 2
Analytical Data: SAMPLE ACF 460,GRAB SAMPLE WITH VISIBLE MOLYBDENITE: 1000 PPM MO, 0.9 PPM AG, 7 PPM CU
Analytical Data: SAMPLE ACF 459, COMPOSITE CHIP SAMPLE OF IRON-STAINED ROCK WITH VISIBLE MOLYBDENITE: 1000 PPM MO, 9.6 PPM AG, 300 PPM CU

Materials

Ore: Molybdenite

Comments

Comment (Deposit): 100 FT WIDE ZONE OF INTENSELY IRON STAINED APLITE CONTAINING LOCALLY VISIBLE PYRITE AND MOLYBDENITE IS EXPOSED OVER 300 FT SLOPE DISTANCE; WITHIN A LARGE DIKELIKE BODY OF APLITE AND GRANODIORITE AT LEAST 2 MI LONG AND EXPOSED OVER A 2000 FT VERTICAL DISTANCE; SAMPLED AREA WITH VISIBLE MOLYBDENITE IS 6 FT WIDE, EXPOSED FOR VERTICAL DISTANCE OF 12 FT

Comment (Deposit): DATA ARE NOT ADEQUATE TO ASSESS ECONOMIC POTENTIAL; FURTHER STUDY WARRANTED ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT

Comment (Geology): COUNTRY ROCK IS METAMORPHIC TERRANE OF MESOZOIC (?) SCHISTOSE BIOTITE HORNFELS, HORNBLENDE HORNFELS, CALC-SILICATE HORNFELS AND MINOR MARBLE, FOLDED ABOUT N TO W TRENDING AXES AND CUT BY CRETACEOUS (?) TONALITIC INTRUSIVES AND A LARGE DIKE-LIKE BODY OF TERTIARY (?) APLITE AND ALTERED GRANODIORITE

Comment (Location): BEST LOCATION: USGS CIRC 615, P. 14, FIG. 10, SAMPLES ACF 459 AND ACF 460 LAND STATUS VALUE CALCULATED 6-94 USING GIS OVERLAY ANALYSIS WITH BLM 1:2,500,000 SCALE OWNERSHIP STATUS MAP (1991).

Comment (Development): DISCOVERED AUG. 5, 1967 DURING GEOLOGIC FIELD STUDIES OF THE JUNEAU ICEFIELD AREA CONDUCTED BY USGS PERSONNEL

References

Reference (Deposit): USGS CIRC 615, P. 12-15

Reference (Deposit): USGS OFR 85-717, P. 311, NO. T002

Reference (Other Database): BAG-OFR-85-717-T002

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