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  3. Mineral Resource Data System (MRDS)

Gertrude Gold 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. Host and associated rocks
  8. Nearby scientific data
  9. Geologic structures
  10. Ore body information
  11. Economic information about the deposit and operations
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10002420
MRDS ID A013341
Record type Site
Current site name Gertrude Gold Prospect
Alternate or previous names Gertrude and Gertrude 400 Adits

Geographic coordinates

Geographic coordinates: -133.3386, 57.59197 (WGS84)
Elevation 6
Relative position 0.2 MI. SW OF HEAD OF WINDHAM BAY

Site location context

Political divisions (FIPS codes)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Sumdum C-5 SE(quadrangle 1:24,000 scale)

Sumdum N(quadrangle 1:100,000 scale)

Sumdum(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Central Southeast Alaska(hydrologic accounting unit)

Southeast Alaska(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Tongass National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Chuck River Wilderness(Wilderness)

Wilderness FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State
United States Alaska

Comments on the location information

  • USGS B 1525, FIGS. 27, 29, 30. LOCATION IS AT GERTRUDE ADIT. GERTRUDE 400 ADIT LIES 500 FT. SE AT ELEVATION OF 400 FT.. LAND STATUS VALUE CALCULATED 6-94 USING GIS OVERLAY ANALYSIS WITH BLM 1:2,500,000 SCALE OWNERSHIP STATUS MAP (1991).

Commodities

Commodity Importance
Gold Primary
Silver Primary

Materials information

Materials Type of material
Gold Ore
Quartz Gangue

Analytical data

Result GERTRUDE ADIT-QUARTZ-PYRITE GRAB SAMPLE: 7.0 PPM AU, 150 PPM AG
Result BEST CHANNEL SAMPLE (6 FT.): 0.30 PPM AU, 3 PPM AG (SEMIQUANTITATIVE SPECTROGRAPHIC ANALYSIS), 1.4 PPM AU, 6.5 PPM AG (FIRE ASSAY). GERTRUDE "400" ADIT-RANDOM CHIP SAMPLE: 0.40 PPM AU, 0.5 PPM AG. B 1525, TABLE 15, SAMPLES 4K076, 4K077, 4K081.

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Schist

Nearby scientific data

(1) -133.3386, 57.59197
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Foliation Of Schist Strikes Nw, Dips 70 Degrees W

Ore body information

  • Strike NW
    Dip 70 DEGREES W

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No

Comments on the workings information

  • GERTRUDE ADIT: 160 FT. ADIT WITH ABOUT 50 FT. OF CROSSCUTS. GERTRUDE 400 ADIT: 55 FT. ADIT WITH 5 FT. CROSSCUT, ADIT FLOODED AS OF 1974.

Comments on development

  • GERTRUDE AND GERTRUDE 400 ADITS DRIVEN ABOUT 1920. NO KNOWN PRODUCTION.

Reference information

Bibliographic references

  • Deposit

    USGS B 1525, P. 121-126, FIGS. 27, 29, 30, PLATES 1, 3 (1984)

  • Other Database

    BAG-B-1525-FIG-27, 29, 30

General comments

Subject category Comment text
Deposit MUSCOVITE SCHIST WITH QUARTZ STRINGERS PARALLEL TO FOLIATION AT GERTRUDE ADIT, QUARTZ POD STRIKING N 50 W, DIPPING 35 DEGREES NE IN PHYLLITIC SCHIST AT GERTRUDE "400" ADIT.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1987 Niles, L.P. (Huber, D.F.) U.S. Geological Survey
Editor 14-SEP-1994 Waller, Nichelle (Mosier, Dan) U.S. Geological Survey PARSED OUT HOST ROCK AND ASSOCIATED ROCK TYPES, AGES, UNIT NAMES, AND UNIT AGES.

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.