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Dakli

Occurrence in Alaska, United States with commodities Silver, Gold, Copper
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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 10003073
MRDS ID A015598
Record type Site
Current site name Dakli

Geographic coordinates

Geographic coordinates: -156.24334, 66.34953 (WGS84)
Relative position This occurrence is at an elevation of about 3,000 feet on the Continental Divide in section 14, T. 11 N., R. 12 E., of the Kateel River Meridian. Cobb (1972, MF-448), locations 8, 9, 10 and Miller and Ferrians (1968), figure 3.

Site location context

Political divisions (FIPS codes)

Yukon-Koyukuk(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Shungnak B-1(quadrangle 1:63,360 scale)

Shungnak SE(quadrangle 1:100,000 scale)

Shungnak(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Kobuk River(hydrologic unit)

Kobuk-Selawik Rivers(hydrologic accounting unit)

Northwest(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

BLM(Federal land areas administered by BLM)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Silver Primary
Gold Primary
Copper Primary

Materials information

Materials Type of material
Chalcopyrite Ore
Covellite Ore
Gold Ore
Malachite Ore
Pyrite Ore
Quartz Gangue

Alteration

  • (Local) Oxidation of pyrite and chalcopyrite to limonite and secondary copper minerals.

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Gneiss

Nearby scientific data

(1) -156.24334, 66.34953
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = The Dakli occurrence is at the northern edge of the Zane Hills pluton at the contact between Cretaceous hornblende-biotite granodiorite and Jurassic-Cretaceous andesite. According to Miller and ferrians (1968), copper and other minerals occur at three places along the contact . At locality 1, massive chalcopyrite in fractured quartz occurs in frost-riven blocks of meta-andesite. Pyrite, malachite, and covellite are also present. Grab samples of chalcopyrite in quartz contain as much as 150 ppm Ag, 0.8 ppm Au, 10,000 ppm Cu, 150 ppm Mo, and 1,000 ppm Zn. Several streams near this locality have meta-andesite float that is cut by sulfide-bearing quartz veins and contains disseminated sulfides. At locality 2, malachite and limonitic chalcopyrite occur in fractures in blocks of brecciated quartz, andesite and altered granodiorite in a zone 100 feet wide. Grab samples from this location contain as much as 30 ppm Ag, 0.09 ppm gold, 700 ppm Zn, 70 ppm Mo, and from 1,000 to 20,000 ppm Cu. At locality 3, a sample of sulfide-bearing quartz contained 1,000 ppm Cu, 2 ppm Ag, and 15 ppm Mo. At locality 4, about one mile south of the contact, rusty-colored molybdenite-bearing quartz veins as much as 2 feet thick cut the andesite near the granodiorite contact. A grab sample from one vein contained 2,000 ppm Mo. Sediments in streams draining the Dakli occurrence contain anomalous values of copper ranging from 100 to 300 ppm.? the intrusives and volcanics both show little or no hydrothermal alteration. Copper and traces of molybdenum minerals are essentially restricted to the contact between the granodiorite and andesite and to the quartz veins within the contact area (unpublished industry data, NANA Regional Corp. files).
  • Age = Cretaceous or younger.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Shungnak and Hughes

Comments on the workings information

  • Workings / Exploration = This occurrence was mapped by the U.S. Geological Survey in the mid 1960's (Miller and Ferrians, 1968). Numerous rock and stream sediment samples were collected and analyzed. A number of exploration companies examined the site during reconnaissance geologic programs in the 1970's and early 1980's.

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Miller and Ferrians, 1968

General comments

Subject category Comment text
Deposit Model Name = Disseminated and massive sulfides in quartz veins cutting andesite and granodiorite.

Reporter information

Type Date Name Affiliation Comment
Reporter 16-DEC-99 Williams, Anita 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.