Styx River

Occurrence in Alaska, United States with commodities Silver, Molybdenum, 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. 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 10002174
MRDS ID A013071
Record type Site
Current site name Styx River
Related records 10231711

Geographic coordinates

Geographic coordinates: -153.16053, 61.53864 (WGS84)
Relative position This occurrence is at an elevation of about 4,000 feet on a small east tributary to the upper Styx River. The map site is just within the north boundary of the NW 1/4 section 30, T 17 N, R 21 W, of the Seward Meridian. It is locality 14 of Cobb (1972, MF-412; 1976, OFR 76-485) and locality 26 of Gamble and others (1989). The location is probably accurate to within one 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-1(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
Molybdenum Primary
Lead Primary
Zinc Critical Primary

Materials information

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

Alteration

  • (Local) Quartz-sericite-pyrite replacement and veining.

Mineral occurrence model information

Model code 85
USGS model code 22c
Deposit model name Polymetallic veins
Mark3 model number 46
Model code 79
USGS model code 21a
Deposit model name Porphyry Cu-Mo
Mark3 model number 2

Host and associated rocks

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

Nearby scientific data

(1) -153.16053, 61.53864

Economic information

Comments on the geologic information

  • Geologic Description = Reed and Elliott (1970) reported that iron-stained and altered intrusive rocks are present along about 200 feet of this creek. The altered rocks consist dominantly of quartz and sericite with minor potassium feldspar and altered biotite. These rocks generally contain less than one percent sulfide minerals, including pyrite, sphalerite, and galena, that are disseminated and in quartz veins as much as 2 inches wide. Sphalerite and galena also occur as thin veinlets and disseminations in felsite. Shear zones in the altered intrusions are also mineralized with sulfides. Besides zinc and lead values, rock samples contain as much as 15 ppm silver and 300 ppm molybdenum. The altered intrusive rocks are probably Late Cretaceous or Tertiary parts of the Alaska-Aleutian Range batholith (Reed and Lanphere, 1973).
  • Age = Late Cretaceous or Tertiary Mineralized granitic rocks in this area are commonly Late Cretaceous or Early Tertiary parts of the Alaska-Aleutian Range batholith (Reed and Elliott, 1970; Reed and Lanphere, 1973).

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 surface observation and 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? or porphyry Cu-Mo? (Cox and Singer, 1986, model 22c and 21a)
Deposit Model Number = 22c?, 21a?

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.

Authoritative Alaska resources

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