Greens Creek Prospect

The Greens Creek Prospect is a zinc, silver, lead, 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.

Site Name

Primary: Greens Creek Prospect
Secondary: Big Sore

Commodity

Primary: Zinc
Primary: Silver
Primary: Lead
Primary: Gold
Secondary: Copper
Tertiary: Bismuth

Location

State: Alaska
District: Admiralty

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

Type: Surface/Underground

Ownership

Owner Name: Noranda Mining, Inc.
Years: 1985 -

Owner Name: Anaconda Minerals Co. (39.5%) ; Noranda Exploration, Inc. (39.5%); Texas Gas Resources C
Years: 1985 -

Production

Not available

Deposit

Record Type: Site
Operation Category: Prospect
Operation Type: Unknown
Discovery Year: 1974
Discovery Method: Geophysical Anomaly
Years of Production:
Organization:
Significant: N
Deposit Size: M

Physiography

Not available

Mineral Deposit Model

Model Name: Massive sulfide, kuroko

Orebody

Form: TABULAR

Structure

Type: R
Description: Anticlinorium

Type: L
Description: Overturned Anticline

Alterations

Alteration Type: L
Alteration Text: Sericite, Chlorite, Talc And Mariposite Occur In Tuffite Below The Mineralization

Rocks

Not available

Analytical Data

Analytical Data: AVERAGE GRADE: 0.5% CU, 2.5% PB, 7-10% ZN, 283.5 GM/TON AG, 2.8 GM/TON AU, CIM BULL, V. 74, NO. 833, P. 57

Materials

Ore: Tetrahedrite
Ore: Bournonite
Ore: Sphalerite
Ore: Galena
Ore: Bornite
Ore: Chalcopyrite
Gangue: Pyrite
Gangue: Barite
Gangue: Pyrrhotite

Comments

Comment (Location): LOCATION APPROXIMATED FROM USGS OFR 85-717, NO. J082 CLAIMS COVER LARGE AREA LAND STATUS VALUE CALCULATED 6-94 USING GIS OVERLAY ANALYSIS WITH BLM 1:2,500,000 SCALE OWNERSHIP STATUS MAP (1991).

Comment (Workings): BY END OF 1984: MORE THAN 85000 FT OF LORE DRILLING FROM 170 SURFACE AND SUBSURFACE STATIONS AND APPROXIMATELY 5000 FT OF DRIFTS COMPLETED

Comment (Geology): DOMINANT STRATIGRAPHIC UNITS ARE MAFIC VOLCANIC ROCKS, SERPENTINITES AND TUFFACEOUS VOLCANICLASTIC ROCKS

Comment (Deposit): STRATIFORM HORIZON AT TUFFITE/ARGILLITE CONTACT CONTAINS MASSIVE SULFIDE, VEIN AND DISSEMINATED ORE; 0.5 FT THICK AU/AG-RICH ZONES, BASEMETAL RICH ZONES UP TO 90 FT THICK; MASSIVE BANDED ZN-RICH ORE OCCURS IN 5 STRATIFORM PODS WHICH AVERAGE 11-FT THICK; PYRITE, QUARTZ-PYRITE AND CHALCOPYRITE-BORNITE VEINS OCCUR STRATIGRAPHICALLY BELOW (?) THESE PODS; 3500 FT MINIMUM STRIKE LENGTH; WHITE CHERT AND BARITE-RICH ZONES WITH HIGH AU-AG VALVES OCCUR ON THE ENDS OF THE MASSIVE ORE ZONE

Comment (Development): CURRENTLY (AS OF 1985) UNDERGOING MINING FEASIBILITY STUDY AND VALIDATION OF CLAIMS PENDING USDA DECISION ON BOUNDARY ADJUSTMENTS TO ADMIRALTY I. NATIONAL MONUMENT; MINING COULD BEGIN BY 1987 AT 300 TPD USING OPEN STOPE METHODS, WITH GRADUAL INCREASE TO 600 TPD

Comment (Deposit): MOST LIKELY MAJOR HARD-ROCK MINING VENTURE IN ALASKA TO ACHIEVE NEW PRODUCTION IN THE 1980'S ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT

References

Reference (Deposit): CIM BULL, V. 74, NO. 833, P. 57

Reference (Deposit): ADGGS SR 38, P. 18-19

Reference (Deposit): ADGGS SR 31, P. 18

Reference (Deposit): ALASKA CONSTRUCTION AND OIL, SEPT 1982, P. 44-48

Reference (Deposit): USGS CIRC 940, P. 29-30

Reference (Deposit): E AND MJ MINING ACTIVITY DIGEST, V. 11, NO. 5, P. 9

Reference (Deposit): ENGINEERING AND MINING JOURNAL, VOL. 185, NO. 1, P. 39

Reference (Deposit): USGS OFR 85-717, P. 95

Reference (Other Database): BAG-OFR-85-717-082

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