Unnamed (north of Boulder Creek, near hill 1293)

Occurrence in Alaska, United States with commodities Gold, Arsenic, Lead, Zinc

Geologic information

Identification information

Deposit ID 10307986
Record type Site
Current site name Unnamed (north of Boulder Creek, near hill 1293)

Geographic coordinates

Geographic coordinates: -165.52018, 64.66268 (WGS84)
Relative position The occurrence is about 500 feet south-southwest of hill 1293 near the center of section 32, T. 9 S., R. 34 W., Kateel River Meridian. It is on the ridge crest about a half-mile north of Twin Mountain Creek (shown as Twin Mtn Ck on the map). The location is accurate within about 500 feet.
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary
Arsenic Secondary
Lead Secondary
Zinc Secondary

Materials information

Materials Type of material
Arsenopyrite Ore
Albite Gangue
Quartz Gangue

Alteration

  • (Local) Sulfidation and albitization of schist near the occurrence.

Mineral occurrence model information

Model code 273
USGS model code 36a
Deposit model name Low-sulfide Au-quartz vein
Mark3 model number 27

Nearby scientific data

(1) -165.52018, 64.66268

Comments on the geologic information

  • Geologic Description = Mineralized schist crops out south of hill 1293 on the ridge crest northwest of theTwin Mountain Creek prospect (NM166). The occurrence was found as a result of a soil geochemistry survey of the Boulder-Twin Mountain Creek area by Kennecott Exploration Company in 1992. The soil survey grid consisted of north-trending lines 1,000 feet apart and east-trending lines 2,000 feet apart. Soils were collected on 200-foot centers (Hawley Resouce Group for Kennecott Exploration Company, written communication, 1992). Soils near this occurrence were strongly anomalous in gold, arsenic, lead, and zinc. Rock samples at the occurrence contained as much as 0.1 ounce of gold per ton and more than 1 percent arsenic. The occurrence is within an area about 400 by 400 feet where soils contain as much as 780 ppm lead, 580 ppm zinc, more than 1,000 ppm arsenic, and more than 100 ppb gold. The occurrence is in an anomalous area along the Twin Mountain-Rodine fault. Country rock at the site is west-dipping calcareous metaturbidite (Bundtzen and others, 1994). The site is moderately oxidized. Galena and sphalerite were not found but probably were present before oxidation.
  • Age = Mid-Cretaceous; postdates regional metmorphism and may be similar in age to low-sulfide gold-quartz veins of the Nome district (see, for example, the Divide prospect, NM058).

Economic information

Economic information about the deposit and operations

Development status Occurrence

Comments on exploration

  • Status = Inactive

Mining district

District name Nome

Comments on the workings information

  • Workings / Exploration = The occurrence was found during follow-up of a soil geochemistry survey conducted for Kennecott Exploration Company in 1992.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Alaska Resource Data File ARDF NM183

Bibliographic references

  • Deposit

    Bundtzen, T.K., Reger, R.D., Laird, G.M., Pinney, D.S., Clautice, K.H., Liss, S.A., and Cruse, G.R., 1994, Progress report on the geology and mineral resources of the Nome mining district: Alaska Division of Geological and Geophysical Surveys, Public Data-File 94-39, 21 p., 2 sheets, scale 1:63,360.

Comments on the references

  • Primary Reference = This report

General comments

Subject category Comment text
Deposit Model Name = Low-sulfide Au-quartz veins? (Cox and Singer, 1986; model 36a).

Reporter information

Type Date Name Affiliation Comment
Reporter 12-MAR-00 Hawley, C.C. and Hudson, Travis L. Hawley Resource Group