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Glass & Heifner

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

Geologic information

Identification information

Deposit ID 10000413
MRDS ID A010578
Record type Site
Current site name Glass & Heifner
Alternate or previous names Little Creek, Earl Mount
Related records 10233657

Geographic coordinates

Geographic coordinates: -150.6806, 59.55254 (WGS84)
Relative position This prospect is about one mile northwest of the mouth of Ferrum Creek. Ferrum Creek drains into a northwestern trending arm of Nuka Bay, called Beauty Bay. A road leads to the property from the Nuka River flats airstrip. The prospect consists of a 400 foot adit, numerous prospect pits and trenches. The adit is at 200 feet elevation and the prospect pit can be found along the hillside above the adit at an elevation of 350 feet. This is Cobb's (1972, MF-397) location 19 and Richter's (1970) location 2. Cobb (1979, OFR 80-87) summarized the relevant references for this prospect under the name Glass and Heifner. This location is accurate to within 300 feet.

Site location context

Political divisions (FIPS codes)

Kenai Peninsula(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Seldovia C-2(quadrangle 1:63,360 scale)

Seldovia NE(quadrangle 1:100,000 scale)

Seldovia(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Resurrection River-Frontal Resurrection Bay(hydrologic unit)

Prince William Sound(hydrologic accounting unit)

South Central Alaska(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Kenai Fjords National Park(National Park)

National Park NPS(Type of land area)

NPS(Federal land areas administered by NPS)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Silver Primary
Gold Primary
Copper Secondary
Lead Secondary
Zinc Critical Secondary

Materials information

Materials Type of material
Arsenopyrite Ore
Galena Ore
Gold Ore
Sphalerite Ore
Quartz Gangue

Alteration

  • (Local) Borden and others (1991) report carbonization, sulfidization, sericitization, and silicification of the wall rock adjacent to the veins.

Mineral occurrence model information

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

Host and associated rocks

  • Host or associated Associated
    Rock type Metamorphic Rock > Metasedimentary Rock > Slate
    Rock unit name Valdez Group
    Rock description Valdez Group
    Stratigraphic age (youngest) Paleocene
    Stratigraphic age (youngest) Paleocene
    Stratigraphic age (youngest) Paleocene
    Stratigraphic age (youngest) Paleocene
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Siltstone
    Rock unit name Valdez Group
    Rock description Valdez Group

Nearby scientific data

(1) -150.6806, 59.55254
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = Cretaceous Valdez Group massive graywacke is exposed in all the underground workings and in most of the surface outcrops. The only black slate and siltstones in the vicinity are exposed in the eastern and southeastern most prospect pits. Foliation and bedding in this area trends N10 to 30E and dips 50 to 60NW (Richter, 1970). ? At least three major quartz veins are exposed on the property. All the quartz veins generally strike east-west and dip to the north. The northern most and principal vein is sporadically exposed in the surface working for about 350 feet and underground for 125 feet. At its western extremity, the vein has a consistent moderate dip of 40 to 60N, but toward the east the dip steepens to more than 80N. The vein ranges from one to five feet wide and consists of white quartz with massive lens and sheets of arsenopyrite (Richter, 1970). Two samples cut randomly across the vein in the main drift assayed 72 and 0.2 ppm gold (Richter, 1970). ? A second and much shorter vein is exposed 100 feet south of the main vein in two surface trenches about 100 feet apart. The vein generally strikes east-west and dips 84 to 87N. This vein contains only minor sulfides, but Pilgrim (1933) reported that abundant free coarse gold was panned from samples of this vein. This vein does not extend in depth to the underground workings. ? Sixty feet further south, a third vein is exposed over a distance of 150 feet in pits and trenches. The third vein is also exposed in a short drift off the main adit. The vein has been stoped from the adit to the surface, the stoped area contained abundant galena and free gold (Pilgrim, 1933). Overall, the vein is lens shaped and pinches out to the east and west. A channel sample from the vein (Richter, 1970) contained 2 ppm gold.
  • Age = Tertiary; Boden and others (1991) report other veins in the district are about 55 m.y. old.

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Homer

Comments on the workings information

  • Workings / Exploration = Four hundred and fifty feet of tunnels were driven in 1932 through 1934, but the amount of ore delineated was not enough to justify a mill (Capps, 1938). Some small-scale, surface mining took place in 1967 (Richter, 1970).

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Richter, 1970

General comments

Subject category Comment text
Deposit Model Name = Low-sulfide, Au-quartz vein (Cox and Singer, 1986; model 36a)
Deposit Other Comments = This occurrence is within Kenai Fjords National Park, consequently the area is closed to mineral entry.

Reporter information

Type Date Name Affiliation Comment
Reporter 15-FEB-99 Jeff A. Huber 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.