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Stiles

Prospect in Alaska, United States with commodities Gold, Copper, Lead
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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. 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 10000955
MRDS ID A011626
Record type Site
Current site name Stiles
Alternate or previous names Styles, Shough
Related records 10185338

Geographic coordinates

Geographic coordinates: -149.22268, 61.78956 (WGS84)
Relative position West of Little Susitna River, 4,000 ft north from the intersection of Willow Creek Road and Fern Mine Road. Accurate within 2,500 ft. Locality 27 from Chapin (1921), locality 13 from Ray (1933), locality 24 of Cobb (1972), and locality 18 of Mackevett and Holloway (1977).

Site location context

Political divisions (FIPS codes)

Matanuska-Susitna(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Anchorage D-6(quadrangle 1:63,360 scale)

Anchorage NW(quadrangle 1:100,000 scale)

Anchorage(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Lower Susitna River(hydrologic unit)

Susitna River(hydrologic accounting unit)

South Central Alaska(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Hatcher Pass Management Area-East(State Special Management Area)

State Special Management Area ST(Type of land area)

ST(Federal land areas administered by ST)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary
Copper Secondary
Lead Secondary

Comments on the commodity information

  • Ore Material = iron oxides
  • Ore Material = iron oxides

Materials information

Materials Type of material
Azurite Ore
Chalcocite Ore
Galena Ore
Gold Ore
Quartz Gangue

Alteration

  • (Local) Wall-rock alteration within a few inches of the veins is intense, but seldom extends more than 10 to 12 inches beyond the quartz filling. Sericitization and carbonate alteration predominate, but there is some pyritization and in the outer parts of the alteration zone chloritization is present (Ray, 1954). Aplite dike shows evidence of hydrothermal alteration. Oxidation of Fe and Cu minerals.

Mineral occurrence model information

Model code 273
USGS model code 36a
Deposit model name Low-sulfide Au-quartz vein
Mark3 model number 27

Nearby scientific data

(1) Klgr
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = Gold-bearing quartz veins cut Late Cretaceous tonalite of the Willow Creek Pluton and at least one vein was reported to parallel a large aplite dike. The veins strike E to N 13 E, and dip 62 W; are 1 to 3 ft thick; and carry azurite, galena, iron oxide, chalcocite (?), and little or no free gold. The property is east of a fault zone that may have been a conduit for mineralizing solutions (Capps, 1915). The aplite dike on the property is part of the largest and most persistent aplite in district which is supposedly traceable for 6 miles (Ray, 1933). Aplite dike shows evidence of hydrothermal alteration.? the Willow Creek Pluton is a zoned pluton: the outer part consists of hornblende quartz diorite and lesser hornblende tonalite; the core consists of hornblende-biotite granodiorite, and lesser hornblende-biotite quartz monzodiorite and biotite quartz monzonite. Wall-rock alteration within a few inches of the veins is intense, but seldom extends more than 10 to 12 inches beyond the quartz filling. Sericitization and carbonate alteration predominate, but there is some pyritization and in the outer parts of the alteration zone chloritization is present (Ray, 1954).
  • Age = Late Cretaceous or younger; veins cut the Late Cretaceous Willow Creek Pluton.

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Willow Creek

Comments on the production information

  • Production Notes = No data on production.

Comments on the workings information

  • Workings / Exploration = Capps (1915; 1916) reported remarkably high assays, several thousand dollars a ton in gold. At least 420 ft of underground workings: 150 ft driven by 1916 along a vein with moderate amounts of gold, the objective being a fault zone exposed on the surface. In 1931 an was adit driven 270 ft, with the last 100 ft in the aplite dike, but no mention of whether vein was found (Ray, 1933).

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Capps, 1915

General comments

Subject category Comment text
Deposit Model Name = Low-sulfide Au-quartz veins (Cox and Singer, 1986; model 36a)
Deposit Other Comments = This prospect is referred to in some literature as Stiles, Styles, and/or Shough, but all appear to be the same prospect.

Reporter information

Type Date Name Affiliation Comment
Reporter 30-JUL-1998 D.P. Bickerstaff U.S. Geological Survey
Reporter 30-JUL-1998 S.W. Huss U.S. Geological Survey

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.