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Blue Quartz Mining Co.

Prospect in Alaska, United States with commodities Gold, Copper
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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 10003480
MRDS ID A106238
Record type Site
Current site name Blue Quartz Mining Co.

Geographic coordinates

Geographic coordinates: -149.28269, 61.89956 (WGS84)
Relative position Prospect located near the head of the north fork of Peters Creek, a northern tributary of Willow Creek. Chapin (1921) reported the creek name as Peterson Creek but the name has since changed. Accurate within 1 mile. Sec. 21, T. 21 N., R. 1 E., of the Seward Meridian.

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-7(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)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary
Copper Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Gold Ore
Pyrite Ore
Tetrahedrite Ore
Orthoclase Gangue
Quartz Gangue
Tourmaline 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).

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) -149.28269, 61.89956
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = Chapin (1921) reported that three parallel granitic dikes cut tonalite country rock. The dikes are composed of quartz, orthoclase, and clusters of tourmaline. They strike N 63 E and one of these dikes, 8 ft wide, gradually passes along its strike into a quartz vein. The vein carries some gold and visible particles of chalcopyrite and tetrahedrite. Several short, intersecting gash veins of quartz intersect this main vein with considerable pyrite. These veins pinch out a short distance from the main fissure, but the persistence of the fissure vein is unknown. It appears to merge into a granite dike in one direction and is untracable due to debris (talus or glacial deposits ?) in the other direction.? the bedrock is the Late Cretaceous Willow Creek Pluton, 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; the dikes and 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

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit Model Name = Low-sulfide Au-quartz veins (Cox and Singer, 1986; model 36a)

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.