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  3. Mineral Resource Data System (MRDS)

Moth Bay

Prospect in Alaska, United States with commodities Copper, Gold, Lead, Silver, Zinc
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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. Ownership information
  15. Reserves and resources
  16. Workings at the site
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10234290
MRDS ID A012336
MAS/MILS ID 0021200025
Record type Site
Current site name Moth Bay
Alternate or previous names Maiden Bay
Related records 10001583

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -131.34346, 55.29695 (WGS84)
Elevation 100
Location accuracy 100(meters)

Site location context

Political divisions (FIPS codes)

Ketchikan Gateway(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Ketchikan B-5(quadrangle 1:63,360 scale)

Ketchikan SW(quadrangle 1:100,000 scale)

Ketchikan(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Ketchikan(hydrologic unit)

Southern 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)

Geographic areas

Country State
United States Alaska

Public Land Survey System information

Meridian Township Range Section Fraction State
Copper River 076 S 093 E 07 C S2NW Alaska

Commodities

Commodity Importance
Copper Tertiary
Gold Tertiary
Lead Tertiary
Silver Tertiary
Zinc Critical Tertiary

Materials information

Materials Type of material
Calcite Unknown
Chalcopyrite Unknown
Galena Unknown
Magnetite Unknown
Muscovite Unknown
Pyrite Unknown
Pyrrhotite Unknown
Quartz Unknown
Sphalerite Unknown

Nearby scientific data

Main Entrance (1) -131.34346, 55.29695
ListMap

Economic information

Ore body information

  • Strike N60W
    Dip 60W
    Thickness 2M
    Length 500M
    Width 25M
    Area 42HA
    Depth to top 30M
    Field Value
    Type of Orebody #1 STRATIFORM
    Shape of Orebody #1 TABULAR
    Type of Orebody #2 REPLACEMENT
    Shape of Orebody #2 IRREGULAR
    Primary mode of Origin HYDROTHERMAL
    Primary Ore Control LITHOLOGY
    Secondary Ore Control BEDDING
    Degree of Wallrock Alter. SLIGHT
    Type of Wallrock Alter. #1 PYRITIZATION
    Type of Wallrock Alter. #2 SERICITIC
    Type of Wallrock Alter. #3 SILICIFICATION
    Strike And Dip N60W:60W
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 1
    Min. Thick. Unconsol. Mat. 0
    Total Surface Area (HA) 42
    Date of Last Modification 860926

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1911

Mining district

District name Ketchikan District

Mineral rights holdings

Type of mineral rights Located Claim
Type of mineral rights Patented

Land status

Ownership category Private

Ownership information

  • Type Owner
    Owner Robert Emmert Gray
    Interest 100
    Home office Alaska
    Year 1975

Reserves and resources

  • Type In-situ
    Estimate year 1953
    Measured 2700mt ore
    Indicated 4500mt ore
    Demonstrated 7200mt ore
    Total resources 7200mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 2 wt-pct Copper Trace 1953
  • Type In-situ
    Estimate year 1953
    Measured 1630mt ore
    Indicated 1630mt ore
    Demonstrated 3260mt ore
    Inferred 100000mt ore
    Total resources 103260mt ore
    Commodity Subtype Grade units Group Importance Year
    Zinc Zn 2 wt-pct Zinc Trace 1953
    Copper Cu 0.5 wt-pct Copper Trace 1953
  • Type In-situ
    Estimate year 1953
    Measured 31750mt ore
    Indicated 59900mt ore
    Demonstrated 91650mt ore
    Total resources 91650mt ore
    Commodity Subtype Grade units Group Importance Year
    Zinc Zn 7.5 wt-pct Zinc Trace 1953
    Copper Cu 1 wt-pct Copper Trace 1953

Workings at the site

  • Type of workings Underground
    Length 197M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method OVERHAND 10-38
    Hardness of Rock HARDROCK WITH LITTLE WATER
    Rock Characteristics NO PLANES OF WEAKNESS
    Rock Support Chars. SUPPORTING
    Mine Support Chars. TIMBER
    Avg. Length of Adits (m) 61
    Number of Adits 1
    1st Condition of Workings UNKNOWN
    Capacity 90
    Capacity Units MT ORE/DAY
    Unit Production Cost 12.18
    Units of Production $/MT ORE
    Operating Days per Year 200
    Operating Shifts per Day 1
    Year of Information 1975

Reference information

Bibliographic references

  • Ownership

    ALASKA KARDEX 120-048

  • Reserve-Resource

    B998C pp. 69-70

  • Deposit

    B592e pp. 90-91

  • Deposit

    B824a p. 18

  • Deposit

    B836a pp. 15-16

  • Deposit

    B998C pp. 59-71

  • Deposit

    C252 p. 6

  • Deposit

    BMOF12-67

  • Deposit

    OF81-122

  • Deposit

    MTA 82 No. F-71

General comments

Subject category Comment text
Deposit BOM DRILLED 2149 FT. OF DD HOLE TO TRY TO FIND ORE DEPTH. DIESEL GENERATOR REQUIRED FOR ON-SITE ELECTRICAL POWER. ROOF PENDANT OF MICA SCHIST AND QUARTZITE IN GRANITIC ST OCK. ORE BODIES IRREGULAR,TABULAR, CONCORDANT W/FOLIATION OF COUNTRY ROCK. TOTAL NUMBER OF ORE BODIES NOT DETERMINED. FIVE PATENTED LODE CLAIMS GRANTED UNDER M.S.1590. PG-QM ENTRIES TAKEN FROM USGS BUL. 998-C. TOTAL MILL EQUIPMENT COST- $1,890,424. MILL WORKING CAPITAL- $189,042. MINE PROPERTY ACQUISITION: $75,000. MINE DEVELOPMENT: $82,024. MINE EXPLORATION: $30,000. MINE EQUIPMENT COSTS: $497,921. MINE WORKING CAPITAL COST: $49,792. BOX 978 WARD COVE, ALASKA 99928. WORKINGS FOUND OPEN IN 1992. RICHARD BISHOP: OWNER

Reporter information

Type Date Name Affiliation Comment
Reporter 25-JAN-1993 Kmm 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.