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Unnamed (southern Shotgun Hills area)

Prospect in Alaska, United States with commodities Silver, Gold, Arsenic, Boron-Borates, Bismuth, Copper, Lead, Antimony, Tin, Mercury
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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 10308365
Record type Site
Current site name Unnamed (southern Shotgun Hills area)

Geographic coordinates

Geographic coordinates: -158.15275, 60.36935 (WGS84)
Relative position This prospect is centered on an upland (elevation of 2,516 feet) that is 2.8 miles north of USGS benchmark King. This is in the headwaters of unnamed north tributaries to the King Salmon River, in the southern Shotgun Hills area. The map site is in the NW1/4 of sec. 9, T 3 N, R 51 W, of the Seward Meridian.

Site location context

Political divisions (FIPS codes)

Dillingham(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Taylor Mountains B-6(quadrangle 1:63,360 scale)

Taylor Mountains SW(quadrangle 1:100,000 scale)

Taylor Mountains(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Nushagak River(hydrologic unit)

Nushagak River(hydrologic accounting unit)

Southwest(hydrologic subregion)

Alaska(hydrologic region)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Silver Primary
Gold Primary
Arsenic Critical Secondary
Boron-Borates Secondary
Bismuth Critical Secondary
Copper Secondary
Lead Secondary
Antimony Critical Secondary
Tin Critical Secondary
Mercury Secondary

Materials information

Materials Type of material
Arsenopyrite Ore
Malachite Ore
Limonite Gangue
Quartz Gangue
Scorodite Gangue

Alteration

  • (Local) Silicification, oxidation, and probably tourmaline replacement, inasmuch as many rock samples contain over 2,000 ppm B.

Mineral occurrence model information

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

Nearby scientific data

(1) -158.15275, 60.36935
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = Clark and others (1970 [OF 438]) report analytical results for several rock samples collected along about 5,000 feet of the crest of this upland. Several of these samples have weakly to strongly anomalous concentrations of Ag (to 7 ppm), As, B, Bi, Cu, Pb, Sb, Sn, Au (to 0.1 ppm), and Hg. Bedrock is mostly hornfels in mid-Cretaceous clastic sedimentary rocks of the Kuskokwim Group. Clark and others (1970 [OF 438]) generally describe this hornfels as strongly limonite stained and cut by numerous small quartz veins rarely exceeding 1/8 inch in width. Some of the quartz veins carry minor amounts of arsenopyrite and arsenopyrite is also locally disseminated in hornfels. Some scorodite and malachite are also locally present.
  • Age = Late Cretaceous. Hornfels is developed in mid-Cretaceous clastic sedimentary rocks and is probably similar in age to hornfels at the Shotgun prospect (TA007), 3 miles to the north-northeast. Intrusive rocks in the area of the Shotgun prospect are about 68 to 70 Ma in age.

Economic information about the deposit and operations

Development status Prospect

Comments on exploration

  • Status = Active?

Mining district

District name Bristol Bay region

Comments on the workings information

  • Workings / Exploration = Reconnaissance surface observation and sampling has taken place on this prospect.

Reference information

Bibliographic references

  • Deposit

    Clark, A.L., Condon, W.H., Hoare, J.M., and Sorg, D.H., 1970, Analyses of rock and stream sediment samples from the Taylor Mountains C-8 quadrangle, Alaska: U.S. Geological Survey Open-File Report 438, 89 p.

Comments on the references

  • Primary Reference = Clark and others, 1970 (OF 438)

General comments

Subject category Comment text
Deposit Model Name = Polymetallic veins? (Cox and Singer, 1986; model 22c)

Reporter information

Type Date Name Affiliation Comment
Reporter 16-MAR-01 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.