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  3. Mineral Resource Data System (MRDS)

Lower Crooked Creek

Occurrence in Alaska, United States with commodity Gold
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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. Host and associated rocks
  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 10001928
MRDS ID A012762
Record type Site
Current site name Lower Crooked Creek

Geographic coordinates

Geographic coordinates: -163.6733, 65.01933 (WGS84)
Relative position Crooked Creek is a short, 2.3 mile long west tributary to Ophir Creek. The mouth of Crooked Creek is 7,500 feet upstream (on Ophir Creek) from the southern boundary of the Bendeleben quadrangle. This occurrence is described as being near the mouth of Crooked Creek and is only approximately located, probably within one mile. It is locality 13 of Cobb (1972; MF 417; 1975; OFR 75-429).

Site location context

Political divisions (FIPS codes)

Nome(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Bendeleben A-4(quadrangle 1:63,360 scale)

Bendeleben SE(quadrangle 1:100,000 scale)

Bendeleben C(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Nome(hydrologic unit)

Norton Sound(hydrologic accounting unit)

Northwest(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Council Native Corporation(ANCSA Village)

ANCSA Village NTVPIC(Type of land area)

NTVPIC(Federal land areas administered by NTVPIC)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary

Materials information

Materials Type of material
Gold Ore
Pyrite Gangue
Quartz Gangue

Alteration

  • (Local) Quartz veining and possibly pyrite disseminatioin in the metasedimentary host rocks is present.

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone

Nearby scientific data

(1) -163.6733, 65.01933
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = A 12 foot-wide mineralized zone in schistose limestone (marble) contains quartz veins and pyrite. Collier and others (1908) report that a quartz stringer with pyrite assayed 0.06 ounces/ton Au and a trace of silver from this area and Smith and Eakin (1911) were told that assays as high as 0.04 ounces/ton Au had been obtained from this occurrence. Bedrock in the area is metasedimentary schist and marble of a Lower Paleozoic assemblage (Till and others, 1986).
  • Age = Possibly mid-Cretaceous; if gold-bearing lode structures are present here they may be similar in age to some lode gold deposits of southern Seward Peninsula. The southern Seward Peninsula lode gold deposits formed as a result of mid-Cretaceous metamorphism (Apodoca, 1994; Ford, 1993, Ford and Snee, 1996; Goldfarb and others, 1997) that accompanied regional extension (Miller and Hudson, 1991) and crustal melting (Hudson, 1994). This higher temperature metamorphism was superimposed on high pressure/low temperature metamorphic rocks of the region.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Probably inactive

Mining district

District name Council

Comments on the production information

  • Production Notes = Placer gold from lower Crooked Creek was both coarse and rounded as well as sharp, angular, and with quartz attached (Smith and Eakin, 1911). Collier and others (1908) also noted that the fragile and crystalline placer gold suggested a local source.

Comments on the workings information

  • Workings / Exploration = This occurrence may have been exposed by surface placer mine workings on a bench along lower Crooked Creek.

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Smith and Eakin, 1911

General comments

Subject category Comment text
Deposit Model Name = Gold-bearing quartz veins in schistose marble

Reporter information

Type Date Name Affiliation Comment
Reporter 15-MAR-1999 Travis L. Hudson Applied Geology

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.