1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Nimbus

Prospect in Alaska, United States with commodities Silver, Gold, Arsenic, Copper, Antimony, Zinc
Map
XML
JSON
KML
B
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 10000696
MRDS ID A011326
Record type Site
Current site name Nimbus
Alternate or previous names Camp Creek

Geographic coordinates

Geographic coordinates: -149.48394, 63.28459 (WGS84)
Relative position This site is at an elevation of about 2,900 feet on the south bank of Camp Creek. It is in the NW1/4 sec. 9, T. 19 S., R. 10 W., of the Fairbanks Meridian. The location is accurate to within 1,000 feet.

Site location context

Political divisions (FIPS codes)

Matanuska-Susitna(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Healy B-5(quadrangle 1:63,360 scale)

Healy S(quadrangle 1:100,000 scale)

Healy(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Chulitna River(hydrologic unit)

Susitna River(hydrologic accounting unit)

South Central Alaska(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Denali National Park(National Park)

National Park NPS(Type of land area)

NPS(Federal land areas administered by NPS)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Silver Primary
Gold Primary
Arsenic Critical Secondary
Copper Secondary
Antimony Critical Secondary
Zinc Critical Secondary

Materials information

Materials Type of material
Arsenopyrite Ore
Chalcopyrite Ore
Pyrite Ore
Sphalerite Ore
Stibnite Ore
Quartz Gangue

Alteration

  • (Local) Phyllic.

Mineral occurrence model information

Model code 85
USGS model code 22c
Deposit model name Polymetallic veins
Mark3 model number 46

Host and associated rocks

  • Host or associated Associated
    Rock type
    Stratigraphic age (youngest) Late Cretaceous
    Chronological age 67.5

Nearby scientific data

(1) -149.48394, 63.28459
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = The country rock at this prospect consists of Upper Jurassic to Upper Triassic(?) crystal tuff, argillite, chert, graywacke, and limestone that are intruded by Upper Cretaceous quartz diorite dikes. The deposit is in brecciated dikes and consists of lenses 1 to 2 meters thick, and up to 10 meters long, of massive chalcopyrite, arsenopyrite, stibnite, pyrite, and sphalerite. The deposit is similar in mineralogy and type to the Golden Zone deposit (HE043) and satellite prospects to the southwest. Samples from arsenopyrite-rich veins contained a maximum 9.3 ppm Au and 22 ppm Ag over a width of 2.0 feet (Hawley and others, 1978).
  • Age = The similarity of the Nimbus deposit to the Upper Cretaceous (70-65 Ma) Golden Zone deposit (HE043) suggests that they are probably the same age.
  • Age = Chron age is for the Golden Zone mine.

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Active

Mining district

District name Valdez Creek

Comments on the workings information

  • Workings / Exploration = There has been surface exploration. Samples from arsenopyrite-rich veins contained a maximum 9.3 ppm Au and 22 ppm Ag over a width of 2.0 feet (Hawley and others, 1978).

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Hawley and others, 1978

General comments

Subject category Comment text
Deposit Model Name = Polymetallic vein (Cox and Singer, 1986; model 22c)
Deposit Other Comments = Some references combine this prospect with the similar Nimrod prospect (HE076) as one site.

Reporter information

Type Date Name Affiliation Comment
Reporter 07-APR-2000 N. Van Wyck Stevens Exploration Management Corporation

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.