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Red Bluff Bay

Prospect in Alaska, United States with commodities Chromium, Iron, PGE, Silica
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Materials information
  8. Nearby scientific data
  9. Ore body information
  10. Economic information about the deposit and operations
  11. Mining district
  12. Mineral rights holdings
  13. Land status
  14. Reserves and resources
  15. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10161197
MRDS ID A013372
MAS/MILS ID 0021160001
Record type Site
Current site name Red Bluff Bay
Alternate or previous names Red Bluff Deposit 1-8
Related records 10094083

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -134.71304, 56.85252 (WGS84)
Elevation 106
Location accuracy 500(meters)

Site location context

Political divisions (FIPS codes)

Sitka(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Port Alexander D-3(quadrangle 1:63,360 scale)

Port Alexander NE(quadrangle 1:100,000 scale)

Port Alexander(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Central Southeast Alaska(hydrologic accounting unit)

Southeast Alaska(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Tongass National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

South Baranof Wilderness(Wilderness)

Wilderness FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State
United States Alaska

Public Land Survey System information

Meridian Township Range Section Fraction State
Copper River 058 S 068 E 09 S2NWNW Alaska

Commodities

Commodity Importance
Chromium Critical Primary
Iron Tertiary
PGE Critical Tertiary
Silica Tertiary

Materials information

Materials Type of material
Ankerite Unknown
Antigorite Unknown
Chromite Unknown
Diopside Unknown
Olivine Unknown
Serpentine Unknown
Talc Unknown

Nearby scientific data

Ore Body (1) -134.71304, 56.85252
ListMap

Economic information

Ore body information

  • Strike N32E
    Dip 70W
    Thickness 30M
    Length 1829M
    Width 305M
    Area 5HA
    Depth to top 0M
    Field Value
    Type of Orebody #1 STRATIFORM
    Shape of Orebody #1 TABULAR
    Type of Orebody #2 DISSEMINATED
    Shape of Orebody #2 LENTICULAR
    Shape of Orebody #3 IRREGULAR
    Primary mode of Origin MAGMATIC DIFFER
    Primary Ore Control IGNEOUS
    Secondary Ore Control FAULTING
    Degree of Wallrock Alter. MODERATE
    Type of Wallrock Alter. #1 UNKNOWN
    Strike And Dip N32E:70W
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 0
    Min. Thick. Unconsol. Mat. 0
    Total Surface Area (HA) 5
    Date of Last Modification 860926

Economic information about the deposit and operations

Operation type Surface
Development status Prospect
Commodity type Metallic
Deposit size Small
Significant Yes
Discovery year 1933
Mining method Open Pit

Mining district

District name Chichagof District

Mineral rights holdings

Type of mineral rights Minerals Only

Land status

Ownership category National Wilderness

Reserves and resources

  • Type In-situ
    Estimate year 1942
    Measured 2100mt ore
    Indicated 29500mt ore
    Demonstrated 31600mt ore
    Total resources 31600mt ore
    Commodity Subtype Grade units Group Importance Year
    Chromium Cr2O3 12 wt-pct Chromium Major 1942
  • Type In-situ
    Estimate year 1984
    Total resources 517mt ore
    Commodity Subtype Grade units Group Importance Year
    Chromium Cr2O3 40 wt-pct Chromium Major 1984
  • Type In-situ
    Estimate year 1984
    Total resources 26308mt ore
    Commodity Subtype Grade units Group Importance Year
    Chromium Cr2O3 18 wt-pct Chromium Major 1984

Comments on the reserve resource information

  • EIGHT DEPOSITS CONTAIN A TOTAL OF 585 TONS OF ORE AVERAGING 40% CHROMITE.

Workings at the site

  • Type of workings Surface
    Area 2HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method OPEN PIT
    Percent Waste Rock 16.6
    Avg. Overburden Thickness 0
    Hardness of Ore M-HARD ROCKS
    Avg. Bench Height (meters) 10
    Max. Pit Slope (degrees) 60
    Capacity 50
    Capacity Units MT ORE/DAY
    Preprod. Stripping Vol. 0
    Unit Production Cost 44.74
    Units of Production $/MT ORE
    Operating Days per Year 180
    Operating Shifts per Day 1
    Year of Information 1978

Reference information

Bibliographic references

  • Ownership

    ALASKA KARDEX 116-008

  • Reserve-Resource

    B936G p. 186

  • Reserve-Resource

    SR38 p. 46

  • Deposit

    MINING JOURNAL, 1942, 1P (BACK UP FILE).

  • Deposit

    B880A p. 88

  • Deposit

    B897A p. 98

  • Deposit

    B936G pp. 173, 178-187

  • Deposit

    B947D pp. 73-75

  • Deposit

    C252 p. 11

  • Deposit

    B1246 p. 145

  • Deposit

    MF464

  • Deposit

    P792 pp. 91-92

  • Deposit

    OF78-787 p. 21

  • Deposit

    OF81-122 p. 94, No. 24

  • Deposit

    OF82-719 p. 10, No. 246

  • Deposit

    SR38 p. 46, No. 109

General comments

Subject category Comment text
Deposit STRIKE & DIP GIVEN IS AVERAGE FOR ALL EIGHT ORE BODIES

Reporter information

Type Date Name Affiliation Comment
Reporter 03-MAR-1995 Rdc U.S. Bureau of Mines

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Maps centered on this site

Authoritative Alaska resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.