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Chathenda Creek

Prospect in Alaska, United States with commodities Copper, Molybdenum, Gold, Silver
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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. Alteration
  9. Mineral occurrence model information
  10. Host and associated rocks
  11. Nearby scientific data
  12. Ore body information
  13. Economic information about the deposit and operations
  14. Mining district
  15. Mineral rights holdings
  16. Land status
  17. Ownership information
  18. Reserves and resources
  19. Workings at the site
  20. Links to other databases
  21. Bibliographic references
  22. General comments
  23. Reporter information

Geologic information

Identification information

Deposit ID 10282788
MRDS ID A010705
MAS/MILS ID 0020780016
Record type Site
Current site name Chathenda Creek
Alternate or previous names Bond Creek, Taku 1-27, Bond Creek-Orange Hill, Johnson Creek
Related records 10093966

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -142.70254, 62.19969 (WGS84)
Elevation 2042
Location accuracy 100(meters)
Relative position Best Location: USGS I-789, Location 3; 4 miles east of the Orange Hill deposit. Accurate within 200 feet.

Site location context

Political divisions (FIPS codes)

Valdez-Cordova(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Nabesna A-4(quadrangle 1:63,360 scale)

Nabesna SW(quadrangle 1:100,000 scale)

Nabesna C(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Alaska(hydrologic region)

Federal lands

Wrangell-St. Elias National Preserve(National Preserve)

National Preserve NPS(Type of land area)

NPS(Federal land areas administered by NPS)

Geographic areas

Country State
United States Alaska

Public Land Survey System information

Meridian Township Range Section Fraction State
Copper River 005 N 015 E 19 NENESE Alaska

Comments on the location information

  • Best Location: USGS I-789, Location 3; 4 miles east of the Orange Hill deposit. Accurate within 200 feet.
    LAND STATUS VALUE CALCULATED 6-94 USING GIS OVERLAY ANALYSIS WITH BLM 1:2,500,000 SCALE OWNERSHIP STATUS MAP (1991).

Commodities

Commodity Importance
Copper Primary
Molybdenum Primary
Gold Secondary
Silver Secondary

Comments on the commodity information

  • Comparison of surface and subsurface data from the nearby Orange Hill deposit and information from mineral industry sources indicate that the tenor of surface samples is about half of the tenor of subsurface samples, apparently due to surface leaching.

Materials information

Materials Type of material
Chalcopyrite Ore
Gold Ore
Molybdenite Ore
Chlorite Gangue
Pyrite Gangue
Biotite Unknown
Feldspar Unknown
Galena Unknown
Sphalerite Unknown
Feldspar Unknown

Alteration

  • (Local) Potassic
  • (Local) Phyllic
  • (Local) Argillic
  • (Local) Propylitic

Mineral occurrence model information

Model code 79
USGS model code 21a
Deposit model name Porphyry Cu-Mo
Mark3 model number 2

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Granodiorite
    Rock unit name Nabesna Pluton
  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite
    Rock type qualifier Porphyry
    Rock unit name Nabesna Pluton
  • Host or associated Host
    Rock type Metamorphic Rock > Metavolcanic Rock > Mafic Metamorphic Rock > Greenstone
    Rock unit name Nikolai Greenstone
  • Host or associated Associated
    Rock type Plutonic Rock > Porphyry
    Rock type qualifier Dikes
  • Host or associated Associated
    Rock type Plutonic Rock > Porphyry
    Rock type qualifier Stocks

Nearby scientific data

Ore Body (1) -142.70254, 62.19969
ListMap

Economic information

Ore body information

  • Thickness 610M
    Length 488M
    Width 625M
    Area 30HA
    Depth to top 2M
    Field Value
    Type of Orebody #1 STOCKWORK
    Shape of Orebody #1 MASSIVE
    Type of Orebody #2 DISSEMINATED
    Shape of Orebody #2 IRREGULAR
    Primary mode of Origin HYDROTHERMAL
    Primary Ore Control IGNEOUS
    Degree of Wallrock Alter. UNKNOWN
    Type of Wallrock Alter. #1 UNKNOWN
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 1
    Min. Thick. Unconsol. Mat. 0
    Total Surface Area (HA) 30
    Date of Last Modification 860825

Comments on the geologic information

  • The prospect is in a large altered zone along the margin of the Nabesna Pluton in an area underlain by Triassic Nikolai Greenstone; both the Nabesna granitic rocks and the Nikolai Greenstone are cut by Tertiary porphyry dikes and small stocks.
  • Central Altered Zone (about 600 x 2,000 meters) contains abundant chlorite, minor biotite, and potassium feldspar, and spotty sericite. Outer Zone (2,000 x 3,000 meters) contains chlorite, epidote, and anhydrite.

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic
Deposit size Large
Significant Yes
Discovery year 1962

Comments on exploration

  • Status = Inactive

Mining district

District name Chisana

Mineral rights holdings

Type of mineral rights Located Claim

Land status

Ownership category Federal

Ownership information

  • Type Owner-Operator
    Owner Kennecott Corp.
    Interest 100
    Home office Washington
    Year 1977

Comments on the ownership information

  • OWNER ADDRESS: BEAR CREEK MINING COMPANY P.O. BOX 9-DISHMAN BRANCH 7821 EAST SPRAGUE AVENUE SPOKANE, WASHINGTON 99213. PHONE: (509) 924-2600 TWX: (509) 328-8570 PGQM SERIES OBTAINED THROUGH PERSONAL COMMUNICATION BETWEEN EVALUATOR AND EXPLORATION MGR- BEAR CREEK MINING COMPANY ALL PGQM SERIES ESTABLISHED USING BEAR CREEK INFORMATION. LANDS WITHDRAWN AS WRANGELL MTS. NATIONAL PRESERVE. PROPOSED BENEFICIATION WITH ORANGE HILL DEPOSIT (0020780015)

Reserves and resources

  • Type In-situ
    Estimate year 1979
    Demonstrated 250000000mt ore
    Total resources 250000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Molybdenum Mo 0.015 wt-pct Molybdenum Minor 1979
    Copper Cu 0.3 wt-pct Copper Major 1979
  • Type In-situ
    Estimate year 1979
    Demonstrated 453600000mt ore
    Total resources 453600000mt ore
    Commodity Subtype Grade units Group Importance Year
    Molybdenum Mo 0.018 wt-pct Molybdenum Minor 1979
    Copper Cu 0.4 wt-pct Copper Major 1979

Comments on the reserve resource information

  • CAPACITY INCLUDED IN ORANGE HILL 0020780015 DEMONSTRATED IN-SITU RESOURCE AS OF 12/31/78 DEMONSTRATED MINEABLE RESERVES ESTIMATED AT: 250,000,000 MT @ 0.30% CU, 0.015% MO
  • Indicated and inferred tonnage of 500 million tonnes of ore averaging 0.30% CU and 0.02% MO (Richter, Singer, and Cox, 1975, USGS MF-655-K, Loc. 30).

Workings at the site

  • Type of workings Surface
    Area 30HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method BENCH (BERM)
    Avg. Overburden Thickness 0
    Hardness of Ore M-HARD ROCKS
    Avg. Bench Height (meters) 12
    Max. Pit Slope (degrees) 60
    Capacity 25000
    Capacity Units MT ORE/DAY
    Unit Production Cost 6.06
    Units of Production $/MT ORE
    Operating Days per Year 300
    Operating Shifts per Day 3
    Year of Information 1984

Comments on the workings information

  • Surface workings.

Comments on development

  • Bear Creek Mining Company was reported as active on the property in 1981. Prospect has been drilled to a limited extent, surface sampling done by USGS in 1974.

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit Pyrite, chalcopyrite, and minor molybdenite in quartz veinlets and as disseminations in granodiorite and quartz monzonite porphyry.
Deposit Discovery year: Early 1960's.
Deposit Part of Wrangell National Park and Preserve; largest porphyry copper deposit in the Nabesna 1:250,000-scale quadrangle. See also: Orange Hill.
Deposit Model name = porphyry, vein, stockwork.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-84 Elliott, R.L. U.S. Geological Survey
Reporter 01-MAR-85 Leonard, Kenneth R. (Elliott, R.L.) U.S. Geological Survey
Reporter 14-APR-94 Mosier, Dan U.S. Geological Survey
Reporter 17-OCT-96 WSR U.S. Bureau of Mines
Updater 01-JAN-97 Elliott, R.L. (Nokleberg, Warren J.) U.S. Geological Survey
Reporter 27-JAN-97 Elliott, R.L., Nokleberg, W.J., Richter, D.H. U.S. Geological Survey
Editor 06-MAR-98 Mason, George U.S. Geological Survey ARDF and MRDS merged
Reporter 24-NOV-02 Travis L. Hudson Applied Geology

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.