Red Bluff Bay Chromite Prospects

The Red Bluff Bay Chromite Prospects is a chromium mine located in Alaska at an elevation of 351 feet.

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: Red Bluff Bay Chromite Prospects

Commodity

Primary: Chromium

Location

State: Alaska

Land Status

Not available

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
Discovery Year: 1933
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

Not available

Mineral Deposit Model

Not available

Orebody

Form: TABULAR, LENS, POD

Structure

Type: L
Description: Phyllite And Schist Country Rock In Open Folds Trending N 30 Degrees W, Plunging 10 Degrees-50 Degrees Se

Alterations

Not available

Rocks

Not available

Analytical Data

Analytical Data: ORE VARIES FROM 18.65% - 50.56% CR2 O3 - USGS B 936-G, P. 181

Materials

Ore: Chromite
Gangue: Serpentine
Gangue: Pyroxene
Gangue: Olivine

Comments

Comment (Geology): ULTRABASIC INTRUSIVE IN TRIASSIC PHYLLITE AND GREENSTONE SCHIST COUNTRY ROCK.

Comment (Deposit): THIS SITE NAME WAS CREATED BY THE REPORTER OR OTHER USGS EMPLOYEE BASED ON PROXIMITY TO SOME MAJOR GEOGRAPHIC FEATURE.

Comment (Location): USGS B936-G, PLATE 22, DEPOSIT NOS. 1, 2; USGS MF-464, LOC. 14. ORE BODIES NOS. 1-8 EXTEND 5,500 FT. S OF LOCATION. LAND STATUS VALUE CALCULATED 6-94 USING GIS OVERLAY ANALYSIS WITH BLM 1:2,500,000 SCALE OWNERSHIP STATUS MAP (1991).

Comment (Commodity): CR: FE RATIO 0.70-2.18 IN CONCENTRATE

Comment (Development): 28 CLAIMS STAKED IN 1933, BUT ABANDONED AFTER A FEW YEARS. NO PRODUCTION.

Comment (Workings): NATURE OF WORKINGS NOT DEFINED

Comment (Deposit): CHROMITE OCCURS AS THIN TABULAR BODIES AND LENSES IN SERPENTINIZED DUNITE, PARALLEL TO SERPENTINIZED PYROXENITE LAYERS IN SILL-LIKE CONCORDANT BODY THAT INTRUDED PHYLLITE AND GREENSTONE SCHIST. 8 ORE BODIES RANGE UP TO A MAXIMUM OF 300 FT. LONG AND 30 FT. WIDE. THE 5 SMALLER DEPOSITS ARE HIGHER GRADE, WITH LAYERS OF BARREN DUNITE SEPERATING HIGH-GRADE CHROMITE LAYERS. 3 LARGER DEPOSITS ARE LOW GRADE, WITH CHROMITE-RICH MASSES OF DUNITE IN WHICH CHROMITE IS DISSEMINATED AS SMALL PODS AND LENSES OF SOLID ORE.

Comment (Deposit): MOST CHROMITE BODIES TOO SMALL TO BE ECONOMIC, LARGER ZONES MAY POSSIBLY BE ECONOMIC AS CONCENTRATING ORE. HIGH IRON CONTENT MAKES CHROMITE UNDESIRABLE. ; INFO.SRC : 1 PUB LIT

References

Reference (Deposit): USGS B 936-G, PLATE 22 (1942)

Reference (Deposit): USGS OF 78-787, P. 21 (1978)

Reference (Deposit): USGS MF-464, LOC. 14 (1972)

Reference (Other Database): BAG-B-936-G-PL-22-1,2

Reference (Reserve-Resource): USGS B936-G, P. 186

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