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

Bravo Glacier

Occurrence in Alaska, United States with commodities Gold, Silver
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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. Host and associated rocks
  8. Nearby scientific data
  9. Economic information about the deposit and operations
  10. Mining district
  11. Links to other databases
  12. Bibliographic references
  13. General comments
  14. Reporter information

Geologic information

Identification information

Deposit ID 10086656
MRDS ID A015645
Record type Site
Current site name Bravo Glacier

Geographic coordinates

Geographic coordinates: -143.90339, 69.26988 (WGS84)
Relative position Accurate to within 1,525 meters (5,000 ft). Brosge' and Reiser, 1976, Locality 35 and Grybeck, 1977, p. 42, Locality 5.

Site location context

Political divisions (FIPS codes)

North Slope(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

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

Demarcation Point SW(quadrangle 1:100,000 scale)

Demarcation Point(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Camden Bay(hydrologic unit)

Eastern Arctic(hydrologic accounting unit)

Arctic Alaska(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Arctic National Wildlife Refuge(National Wildlife Refuge)

National Wildlife Refuge FWS(Type of land area)

FWS(Federal land areas administered by FWS)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary
Silver Primary

Materials information

Materials Type of material
Gold Ore
Pyrite Gangue

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
    Stratigraphic age (youngest) Early Devonian
    Stratigraphic age (youngest) Early Devonian
  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Granite

Nearby scientific data

(1) -143.90339, 69.26988
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = Traces of gold and silver are found in the pyritic zone of the granite of Okpilak batholith.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Canning

Reference information

Bibliographic references

  • Deposit

    Cobb, E.H., Mayfield, C.F., and Brosg?, W.P., 1981, Summaries of data on and lists of references to metallic and selected nonmetallic mineral occurrences in eleven quadrangles in northern Alaska (Arctic, Baird Mountains, Chandler Lake, DeLong Mountains, Demarcation Point, Howard Pass, Misheguk Mountain, Mount Michelson, Noatak, Point Lay, and Table Mountain); Supplement to Open-File Report 75-628; Part A, Summaries of data to January 1, 1981: U.S. Geological Survey Open-File Report 81-767-A, 25 p.

  • Deposit

    Brosge', W.P., and Reiser, H.N., 1976, Preliminary geologic and mineral resource maps (excluding petroleum), Arctic National Wildlife Range, Alaska: U.S. Geological Survey Open-File Report 76-539, 4 sheets, scale 1:500,000.

  • Deposit

    Cobb, E.H., Mayfield, C.F., and Brosge, W.P., 1981, Summaries of data on and lists of references to metallic and selected nonmetallic mineral occurrences in eleven quadrangles in northern Alaska (Arctic, Baird Mountains, Chandler Lake, DeLong Mountains, Demarcation Point, Howard Pass, Misheguk Mountain, Mount Michelson, Noatak, Point Lay, and Table Mountain); Supplement to Open-File Report 75-628; Part A, Summaries of data to January 1, 1981: U.S. Geological Survey Open-File Report 81-767-A, 25 p.

General comments

Subject category Comment text
Deposit Model Name = Lode; disseminated

Reporter information

Type Date Name Affiliation Comment
Reporter 13-SEP-1996 Powers, M.T. U.S. Geological Survey
Reporter 13-SEP-1996 Huber, D.F. U.S. Geological Survey
Reporter 13-SEP-1996 Kelley, J.S. 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.