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  3. Mineral Resource Data System (MRDS)

Unnamed (head of Hartman River)

Occurrence in Alaska, United States with commodities Silver, Gold, Copper, Zinc
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Alteration
  8. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Economic information about the deposit and operations
  12. Mining district
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10002166
MRDS ID A013063
Record type Site
Current site name Unnamed (head of Hartman River)

Geographic coordinates

Geographic coordinates: -153.57305, 61.59086 (WGS84)
Relative position This occurrence is in the peaks at the head of the southeast headwaters of the Hartman River. It is at an elevation of about 5,100 feet and 1.2 miles northwest of peak 5875. The map site is in the NE1/4 section 2, T 17 N, R 24 W, of the Seward Meridian. This is locality 6 of Cobb (1972 [MF 412]; 1976 [OF 76-485]). The location is probably accurate to within a quarter of a mile.

Site location context

Political divisions (FIPS codes)

Bethel(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Lime Hills C-2(quadrangle 1:63,360 scale)

Lime Hills NE(quadrangle 1:100,000 scale)

Lime Hills(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Kuskokwim River(hydrologic accounting unit)

Southwest(hydrologic subregion)

Alaska(hydrologic region)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Silver Primary
Gold Primary
Copper Primary
Zinc Critical Primary

Materials information

Materials Type of material
Arsenopyrite Ore
Chalcopyrite Ore
Pyrite Ore
Pyrrhotite Ore
Sphalerite Ore
Quartz Gangue
Tourmaline Gangue

Alteration

  • (Local) Quartz and tourmaline veining.

Mineral occurrence model information

Model code 85
USGS model code 22c
Deposit model name Polymetallic veins
Mark3 model number 46

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
    Stratigraphic age (youngest) Pliocene
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Siltstone

Nearby scientific data

(1) g
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = Reed and Elliott (1970) reported finding mineralized float boulders at this locality. The boulders include argillite cut by 6-inch-wide quartz veins containing arsenopyrite, pyrite, tourmaline, and chalcopyrite, as well as quartz porphyry cut by thin veinlets containing pyrite and sphalerite. Cobb and Reed (1981) reported that upper Mesozoic graywacke, shale, and argillite are cut by mineralized shear zones and faults that contain disseminated sulfides, narrow veins of massive sulfide minerals, and quartz veins with minor amounts of sulfide minerals. In addition to copper and zinc anomalies, samples contain as much as 70 ppm silver and 0.9 ppm gold. This mineralized area is about one mile from a small Tertiary granitic stock.
  • Age = Tertiary Mineralization crosscuts Upper Mesozoic sedimentary rocks. Polymetallic mineralization in this region is commonly associated with Tertiary granitic rocks.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name McGrath

Comments on the workings information

  • Workings / Exploration = Reconnaissance sampling has been completed in this area (Reed and Elliott, 1970).

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Reed and Elliott, 1970

General comments

Subject category Comment text
Deposit Model Name = Polymetallic veins (Cox and Singer, 1986, model 22c)

Reporter information

Type Date Name Affiliation Comment
Reporter 10-JUN-2001 Travis L. Hudson Applied Geology
Reporter 10-JUN-2001 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.