Unnamed (on Hogan Hill)

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

Geologic information

Identification information

Deposit ID 10001143
MRDS ID A011836
Record type Site
Current site name Unnamed (on Hogan Hill)

Geographic coordinates

Geographic coordinates: -145.48155, 62.66159 (WGS84)
Relative position An unnamed prospect (one of the Hogan Hill prospects of Cobb, 1979 [OF 79-1247, p. 14]) is on the north end of Hogan Hill about 0.1 mile east of the Richardson Highway. The prospect is about 0.1 to 0.2 miles east of the center of section 7, T. 10 N., R. 1 W., Copper River Meridian. This prospect is locality 3 of Rose and Saunders (1965), and Richter and Matson (1972). The location is probably accurate within 0.1 mile.

Site location context

Political divisions (FIPS codes)

Valdez-Cordova(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Gulkana C-3(quadrangle 1:63,360 scale)

Gulkana NE(quadrangle 1:100,000 scale)

Gulkana C(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Middle Copper River(hydrologic unit)

Copper River(hydrologic accounting unit)

South Central Alaska(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

BLM(Federal land areas administered by BLM)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Copper Primary
Lead Secondary
Zinc Critical Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Pyrite Ore
Sphalerite Ore
Quartz Gangue

Mineral occurrence model information

Model code 85
USGS model code 22c
Deposit model name Polymetallic veins
Mark3 model number 46
Model code 58
USGS model code 18a
Deposit model name Porphyry Cu, skarn-related
Mark3 model number 9

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Amphibolite
    Stratigraphic age (youngest) Late Permian

Nearby scientific data

(1) -145.48155, 62.66159

Economic information

Comments on the geologic information

  • Geologic Description = The prospect is in amphibolite on the south flank of a granodiorite intrusion that crops out northeast of Hogan Hill. The foliation in the amphibolite strikes north to north-northwest and dips steeply to the east. Small quartz veins strike east-northeast and dip 75 degrees southeast. The strike of the amphibolite is sub parallel to the contact between the granodiorite and amphibolite (Rose and Saunders, 1965, figs 1 and 2). The amphibolite and granodiorite both form part of the Gulkana River metamorphic complex. Veinlets of quartz that contain pyrite and chalcopyrite with subordinate galena and sphalerite are sub parallel to the foliation of the amphibolite (Rose and Saunders, 1965; Mulligan, 1974).
  • Age = Mineralization is probably related to a Late Jurassic granodiorite.

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Chistochina

Comments on the workings information

  • Workings / Exploration = Many small prospect pits (Rose and Saunders, 1965; Mulligan, 1974).

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Rose and Saunders, 1965; Mulligan, 1974

General comments

Subject category Comment text
Deposit Model Name = Polymetallic vein or low-grade porphyry copper(?) (Cox and Singer, 1986; model 22c or 18a)
Deposit Other Comments = See also GU006 and GU007.

Reporter information

Type Date Name Affiliation Comment
Reporter 20-DEC-00 W.T. Ellis Alaska Earth Sciences
Reporter 20-DEC-00 Hawley, C.C. Hawley Resource Group
Reporter 20-DEC-00 W.J. Nokleberg U.S. Geological Survey

Beyond USGS

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

Authoritative Alaska resources

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