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Jewel

Past Producer in Alaska, United States with commodities Gold, Silver, Copper, Molybdenum, Lead, 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. 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 10000985
MRDS ID A011656
Record type Site
Current site name Jewel
Alternate or previous names Monarch-Jewel, Crow Creek Gold Corporation, Gunnysack
Related records 10112852

Geographic coordinates

Geographic coordinates: -149.10651, 61.0426 (WGS84)
Relative position Marked with an adit symbol on Barnes Mountain on the Anchorage A-6 1:63,360-scale topographic map, located on east side of Crow Creek about 1 mile south-southeast of VABM Pass (Crow Pass). Accurate within 400 ft. Locality 3 on plate 33 of Park (1933), locality 53 of Cobb (1972), and locality 42 of MacKevett and Holloway (1977).

Site location context

Political divisions (FIPS codes)

Anchorage(Municipality)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

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

Anchorage SW(quadrangle 1:100,000 scale)

Anchorage(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Anchorage(hydrologic unit)

Knik Arm(hydrologic accounting unit)

South Central Alaska(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Chugach National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary
Silver Secondary
Copper Secondary
Molybdenum Secondary
Lead Secondary
Zinc Critical Secondary

Materials information

Materials Type of material
Arsenopyrite Ore
Chalcopyrite Ore
Galena Ore
Gold Ore
Molybdenite Ore
Pyrite Ore
Pyrrhotite Ore
Quartz Gangue

Alteration

  • (Local) The intrusive rocks have undergone argillic alteration. Limonite, scorodite, and cerusite present as a result of oxidation (Park, 1933).

Mineral occurrence model information

Model code 274
USGS model code 36a.1
Deposit model name Low-sulfide Au-quartz vein, Chugach-type
Mark3 model number 26

Nearby scientific data

(1) -149.10651, 61.0426
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = Quartz vein cutting Late Cretaceous argillite and graywacke. Hoekzema and others (1987) reported the country rock to be well-bedded Valdez Group rocks that display a hornfels-like texture as a result of contact metamorphism by a nearby argillically altered quartz diorite stock. Both the vein and sedimentary bedding strike N 30 W, and dip 60 NE. Vein is 2 to 12 inches thick and contains arsenopyrite, pyrite, chalcopyrite, pyrrhotite, molybdenite, galena, and free gold (Park, 1933). Numerous small, quartz diorite intrusive bodies with argillic alteration can be found in the area. The owner of the claim reported another major vein and numerous smaller veins to Park (1933).? Chip samples range from 10.6 to 36.7 g/ton Au, and about 10.6 g/ton Ag (Hoekzema and others, 1987).
  • Age = Late Cretaceous or younger; veins cut Late Cretaceous Valdez Group rocks.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Anchorage

Comments on the production information

  • Production Notes = Total recorded production, including that of the Agostino Mine (ARDF number AN109), was 4,932 oz gold and 996 oz silver (Hoekzema and others, 1987).

Comments on the reserve resource information

  • Reserves = Jansons and others (1984) and Hoekzema and others (1987) reported samples taken by the U.S. Bureau of Mines indicate a resource of 3,100 tons with a weighted-average grade of 1.75 oz/ton Au and 0.75 oz/ton Ag. They conclude that the mine has high mineral development potential based on history and sampling.

Comments on the workings information

  • Workings / Exploration = First located in 1912. Explored by over 1,240 feet of underground workings, including a 150 foot tunnel driven along the vein. Considerable surface improvements by 1933, including a mill which was partially destroyed by snowslides (Park, 1933). In 1934 site was sold to Augustina Mining Co. and connected to the mill at Agostino mine by a tram (Hoekzema and others, 1987). Chip samples range from 10.6 to 36.7 grams/ton Au, with about 10.6 grams/ton Ag. Hoekzema and others (1987) reported samples taken by the U.S. Bureau of Mines indicate a resource of 3,100 tons with a weighted-average grade of 1.75 oz/ton Au and 0.75 oz/ton Ag. They conclude that the mine has high mineral development potential based on history and sampling.

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Park, 1933

General comments

Subject category Comment text
Deposit Model Name = Chugach-type low-sulfide Au-quartz veins (Bliss, 1992; model 36a.1)
Deposit Other Comments = Data for Jewell and Agostino (ARDF number AN109) is confused or combined in some references. Both were probably under same management (Crow Creek Gold Corp.) by 1937.

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
Reporter 30-JUL-1998 W.J. Nokleberg 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.