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Peter Sather

Prospect in Alaska, United States with commodities Gold, Silver, Copper, Lead
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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 10000406
MRDS ID A010569
Record type Site
Current site name Peter Sather
Alternate or previous names Rolphs, Alan Blairs

Geographic coordinates

Geographic coordinates: -150.63253, 59.45948 (WGS84)
Relative position This prospect is located on the beach along the south shore of Yalik Bay about two miles west of Yalik Point. Yalik Bay is about 70 miles southwest of Seward, Alaska in Nuka Bay. This is Cobb's (1972, MF-397) location 16 and is accurate within half a mile. Cobb (1979, OFR 80-87) summarized the relevant references under the name Sather.

Site location context

Political divisions (FIPS codes)

Kenai Peninsula(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

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

Seldovia SE(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)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary
Silver Secondary
Copper Secondary
Lead Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Gold Ore
Pyrite Ore
Sphalerite Ore
Calcite Gangue
Quartz Gangue

Alteration

  • (Local) Calcite rims are found on slate fragments within the vein.

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 Plutonic Rock > Mafic Intrusive Rock
    Stratigraphic age (youngest) Paleocene
    Stratigraphic age (youngest) Paleocene
    Stratigraphic age (youngest) Pliocene
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Slate
    Rock unit name Valdez Group
    Rock description Valdez Group

Nearby scientific data

(1) -150.63253, 59.45948
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = The Rolph No. 1 vein intrudes the black slate of the Cretaceous Valdez Group (Richter, 1970). The No.1 vein strikes S57E and dips 85E. On the surface, the vein ranges from a few inches to 42 inches thick and contains white crystalline quartz with pyrite, chacopyrite, sphalerite, and galena. Surface samples of the vein contained 0.80 ounces of gold and 1.40 ounces of silver per ton (Pilgrim,1933). In the adit, which is about 87 feet long, the vein is six inches wide and contains some sulfides, but no assay results are reported. ? the western vein is along the margins of a light gray granodiorite dike and the black slates. In hand sample, the dike rock generally contains a few small altered amphibole and plagioclase phenocrysts; it is probably Tertiary in age ( Richter, 1970). A 60 foot adit intersects but does not cross the vein. The vein is at least 30 inches wide in the adit and consists of dull white quartz with considerable slate fragments, but no sulfides. The margins of the slate fragments have calcite rims. A sample from a portion of the vein returned traces of gold and silver (Pilgrim, 1933).
  • 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 = Some surface excavations and 87 feet of adit were driven in the 1930's. Chip samples in the No. 1 vein assayed 0.8 ounces of gold and 1.40 ounces of silver per ton (Pilgrim, 1933). Chip/channel samples taken at the surface of the Rolph No. 1 vein along strike 0.25 ounces of gold per ton (MacKevett and Holloway, 1977).

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Pilgrim, 1933

General comments

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

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.