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  3. Mineral Resource Data System (MRDS)

Ripstein Ledge Prospect

Occurrence in Alaska, United States with commodities Gold, Silver
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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. Ore body information
  11. Controls for ore emplacement
  12. Economic information about the deposit and operations
  13. Workings at the site
  14. Links to other databases
  15. Bibliographic references
  16. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10000372
MRDS ID A010439
Record type Site
Current site name Ripstein Ledge Prospect

Geographic coordinates

Geographic coordinates: -146.61921, 60.88292 (WGS84)
Location accuracy 1000(meters)
Relative position 1 1/2 MILES N 45 W OF COPPER MTN., EAST BANK BOULDER BAY, Within 1/2 Mile Radius, Within 1/2 Mile Radius, Within 1/2 Mile Radius

Site location context

Political divisions (FIPS codes)

Valdez-Cordova(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Cordova D-7(quadrangle 1:63,360 scale)

Cordova NW(quadrangle 1:100,000 scale)

Cordova(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Eastern Prince William Sound(hydrologic unit)

Prince William Sound(hydrologic accounting unit)

South Central Alaska(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Tatitlek Corporation(ANCSA Village)

ANCSA Village NTVPIC(Type of land area)

NTVPIC(Federal land areas administered by NTVPIC)

Chugach National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary
Silver Primary

Comments on the commodity information

  • GRAB SAMPLES MAY NOT HAVE BEEN TYPICAL

Materials information

Materials Type of material
Marcasite Gangue
Pyrite Gangue
Quartz Gangue

Alteration

  • (Local) "Iron Hat" Caps "Ledge" Along Entire Length Of Outcrop

Analytical data

Result GRAB SAMPLES 0.10 OUNCES/TON AU, 0.35 TO 0.45 OUNCES/TON AG

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock
    Rock unit name Orca Group
    Rock description Orca Group
    Stratigraphic age (youngest) Pliocene

Nearby scientific data

(1) -146.61921, 60.88292
ListMap

Economic information

Ore body information

  • Strike N 45 E
    Dip 80 N
    Thickness 4.57M
    Length 7620M

Controls for ore emplacement

  • Shearzone

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Medium
Significant No
Discovery year 1897
Discoverer Mr. Ripstein

Workings at the site

  • Type of workings Surface
    Area 0.004HA
    Length 9.14M

Comments on the workings information

  • WORKINGS COMPRISED NOTHING MORE THAN STRIPPING OF SURFACE MATERIAL & GROUND COVER

Comments on development

  • SITE MAY BE ON PROPERTY LATER ACQUIRED BY REYNOLDS-ALASKA DEVELOPMENT COMPANY ON EAST SHORE OF BOULDER BAY

Reference information

Bibliographic references

  • Deposit

    USGS 20TH ANNUAL REPORT, PART VII, P. 418

  • Deposit

    USGS OFR 79-973, P. 49

General comments

Subject category Comment text
Deposit SULFIDES WITH QUARTZ GANGUE IN SHEAR ZONE OVERLAIN BY EXTENSIVE GOSSAN

Reporter information

Type Date Name Affiliation Comment
Reporter 01-APR-84 Garrison, Michael T. (Elliott, R. L.) 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.