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  3. Mineral Resource Data System (MRDS)

Sumdum

Prospect in Alaska, United States with commodities Copper, Gold, 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 10112945
MRDS ID A013331
MAS/MILS ID 0021150003
Record type Site
Current site name Sumdum
Alternate or previous names Sumdum Chief Discovery, Sumdum 5-8, Sumdum 10, Sumdum 15, Sumdum 17-19, Leo Mark Anthony, R. H. Seraphim, Moneta Porcupine Mines, Ltd., R. C. Manuell, Tennessee Corp., Cities Service, C-D Development Corp., Sumdum Chief 1-62, Alaska Helicopter Syndicate
Related records 10096792, 10258240

Geographic coordinates

Point of reference Claim
Geographic coordinates: -133.43805, 57.77195 (WGS84)
Elevation 1170
Location accuracy 100(meters)

Site location context

Political divisions (FIPS codes)

Hoonah-Angoon(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Sumdum D-5(quadrangle 1:63,360 scale)

Sumdum N(quadrangle 1:100,000 scale)

Sumdum(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)

Tracy Arm-Fords Terror 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 047 S 074 E 28 C N2N2 Alaska

Commodities

Commodity Importance
Copper Primary
Gold Secondary
Silver Primary
Zinc Critical Primary

Materials information

Materials Type of material
Almandite Unknown
Andesine Unknown
Biotite Unknown
Chalcopyrite Unknown
Hornblende Unknown
Muscovite Unknown
Pyrite Unknown
Pyrrhotite Unknown
Quartz Unknown
Sphalerite Unknown
Staurolite Unknown

Nearby scientific data

Claim (1) -133.43805, 57.77195
ListMap

Economic information

Ore body information

  • Strike N30W
    Dip 90
    Thickness 10M
    Length 3000M
    Width 300M
    Area 50HA
    Field Value
    Type of Orebody #1 REPLACEMENT
    Shape of Orebody #1 TABULAR
    Type of Orebody #2 DISSEMINATED
    Shape of Orebody #2 IRREGULAR
    Type of Orebody #3 FISSURE VEIN
    Shape of Orebody #3 LENTICULAR
    Primary mode of Origin HYDROTHERMAL
    Primary Ore Control FAULTING
    Secondary Ore Control FOLDING
    Degree of Wallrock Alter. NONE
    Type of Wallrock Alter. #1 UNKNOWN
    Strike And Dip N30W:90
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 0
    Min. Thick. Unconsol. Mat. 0
    Total Surface Area (HA) 50
    Date of Last Modification 830321

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1958

Mining district

District name Juneau District

Mineral rights holdings

Type of mineral rights Located Claim

Land status

Ownership category National Wilderness

Ownership information

  • Type Owner
    Owner Sumdum Development Corp.
    Interest 100
    Home office Canada
    Year 1980

Comments on the ownership information

  • OWNER ADDRESS: SUMDUM DEVELOPMENT CORP. SUITE 600, 365 BAY ST. TORONTO, CANANDA MSH2V9 TELE: (416) 364-3453

Reserves and resources

  • Type In-situ
    Estimate year 1977
    Indicated 1697000mt ore
    Demonstrated 1697000mt ore
    Inferred 24229000mt ore
    Total resources 25926000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.57 wt-pct Copper Major 1977
    Zinc Zn 0.37 wt-pct Zinc Major 1977
    Silver Ag 10.29 g/mt Silver Major 1977

Comments on the reserve resource information

  • R1=M1C1 MATRIX BASED ON PUBLISHED RESERVES DETERMINED BY U.S.B.M. R1=M9C1 R1=M9C4

Workings at the site

  • Type of workings Underground
    Length 19800M
    Overall depth 180M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method OVERHAND SHRINKAGE 10-67
    Percent Waste Rock 10
    Percent Recovery 90
    Hardness of Rock HARDROCK FISSURED WITH MODERATE WATER
    Rock Characteristics ONE SYSTEM OF WEAKNESS PLANES
    Rock Support Chars. SUPPORTING MAY BACK SLAB
    Mine Support Chars. UNKNOWN
    Number of Shafts 2
    Avg. Length of Adits (m) 4860
    Number of Adits 4
    Capacity 6057
    Capacity Units MT ORE/DAY
    Unit Production Cost 27.77
    Units of Production $/MT ORE
    Operating Days per Year 180
    Operating Shifts per Day 2
    Year of Information 1980

Reference information

Bibliographic references

  • Ownership

    ALASKA KARDEX 115-050

  • Reserve-Resource

    OF77-649 p. 212

  • Deposit

    IC7379 pp. 41-42

  • Deposit

    MIN ENG 6112 p. 1353

  • Deposit

    GR1 pp. 68-69

  • Deposit

    P450A p. 54

  • Deposit

    B1108E

  • Deposit

    ADGS AR 1966a p. 63, 65

  • Deposit

    B1246 pp. 189-190

  • Deposit

    MF425

  • Deposit

    GR44 p. 34

  • Deposit

    OF77-649

  • Deposit

    OF78-698 pp. 28-29

  • Deposit

    E&MJ 7905 p. 84

  • Deposit

    OF81-122 p. 122, Nos. 13-14

  • Deposit

    AMR 81-82

  • Deposit

    MTA 82 No. F-33

  • Deposit

    SR38 p. 46, No. 106

General comments

Subject category Comment text
Deposit USGS CRIB A003399 USGS CRIB W016508

Reporter information

Type Date Name Affiliation Comment
Reporter 19-MAR-1996 Dwb 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.