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Holland

Prospect in Alaska, United States with commodities Gold, Copper, Molybdenum, 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 10000946
MRDS ID A011617
Record type Site
Current site name Holland
Alternate or previous names Little Willie, Bronson and France

Geographic coordinates

Geographic coordinates: -149.2938, 61.81845 (WGS84)
Relative position 4,500 ft northwest of the end of the unnamed unimproved road that is parallel to Craigie Creek. Marked with adit symbol and labeled 'Holland Prospect' on the Anchorage D-7 1:63,360-scale topographic map. Accurate within 400 ft. This is locality 9 of Chapin (1921), locality 16 from Cobb (1972), and locality 13 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-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
Molybdenum Secondary
Lead Secondary

Materials information

Materials Type of material
Bornite Ore
Chalcopyrite 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).

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) -149.2938, 61.81845
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = Late Cretaceous tonalite of the Willow Creek Pluton contains a sheared composite quartz vein and pegmatite dike. The vein strikes N 77 W, and dips 26 NE. The central quartz zone consists of a 6 ft central band of quartz bounded by a 1 ft pegmatite hanging wall and a 16 in pegmatite footwall (Ray, 1954). Pegmatite dike shows that reopening took place after consolidation of pegmatite. Glassy quartz was then deposited between pegmatite walls. The quartz and pegmatite again fractured; chalcopyrite, bornite, and pyrite were deposited in fractures and replaced orthoclase in pegmatite (Ray, 1933). Quartz contains stringers of sulfides - including an unidentified bismuth (?) mineral - up to 1 ft long, but less than 2 inches thick (Ray, 1954). Quartz float contains dessiminated molybdenite flakes and free gold (Capps and Tuck, 1935).? 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; vein cuts 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 workings information

  • Workings / Exploration = Very little development occurred. Workings were all on the surface. The amount of copper contained in this deposit appears to be very small.

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Ray, 1954

General comments

Subject category Comment text
Deposit Model Name = Low-sulfide Au-quartz veins ? (Cox and Singer, 1986; model 36a ?)
Deposit Other Comments = This listing includes reference to Bronson and France. It appears that this prospect was a result of Little Willie property being restaked (Jasper, 1962).

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.

External references

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.