Golconda Mine

Prospect in Skamania county in Washington, United States with commodities Gold, Copper, Zinc, Lead

Geologic information

Identification information

Deposit ID 10047843
MRDS ID M700170
Record type Site
Current site name Golconda Mine

Geographic coordinates

Geographic coordinates: -122.07091, 46.34731 (WGS84)
Elevation 939
Location accuracy 1000(meters)
Relative position 0.5 MI SOUTH-SOUTHWEST OF RYAN LAKE, Estimated Within Half Section Where Recent Mapping Shows Vein Crossing Creek
(click for info)

Geographic areas

Country State County
United States Washington Skamania

Public Land Survey System information

Meridian Township Range Section Fraction State
Willamette 010N 006E 16 NEAR CENTER OF W2 Washington

Comments on the location information

  • NEAR EDGE OF BLAST ZONE FROM 1980 ERUPTION OF MOUNT ST. HELENS. LOCATION MAP AVAILABLE, MOEN (1977, p. 17, Figure 10)

Commodities

Commodity Importance
Gold Primary
Copper Secondary
Zinc Tertiary
Lead Tertiary

Materials information

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

Analytical data

Result REPORTEDLY $400/TON AU

Mineral occurrence model information

Model code 85
USGS model code 22c
Deposit model name Polymetallic veins
Mark3 model number 46

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite
    Rock unit name Spirit Lake Pluton, Main Phase
    Rock description Spirit Lake Pluton, Main Phase
    Stratigraphic age (youngest) Miocene
    Stratigraphic age (youngest) Miocene

Nearby scientific data

(1) -122.07091, 46.34731

Ore body information

  • General form VEIN

Economic information

Economic information about the deposit and operations

Operation type Underground
Development status Prospect
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name St. Helens District - Ryan Lake Area

Mineral rights holdings

Type of mineral rights Located Claim

Land status

Ownership category National Forest
Area name In Gifford-Pinchot National Forest
Ownership category National Monument

Ownership information

  • Type Operator
    Owner Duval Corp
    First year 1977

Comments on the production information

  • A MARKETABLE CONCENTRATE WAS NOT OBTAINED, AND OPERATIONS CEASED.

Workings at the site

  • Type of workings Underground
    Length 12.19M

Comments on the workings information

  • Adit 775 ft long with 100 ft winze.

Comments on development

  • NO WORK HAS BEEN DONE SINCE 1930'S.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS M700170
U.S. Bureau of Mines Minerals Availability System MAS 0530590035

Bibliographic references

  • Deposit

    HUNTTING, M.T., 1956, INVENTORY OF WASHINGTON MINERALS - PART II, METALLIC MINERALS: WASHINGTON DIVISION OF MINES AND GEOLOGY BULLETIN 37, V. 1, P. 155.

  • Deposit

    MOEN, W.S., 1977, ST HELENS AND WASHOUGAL MINING DISTRICTS OF THE SOUTHERN CASCADES OF WASHINGTON: WASHINGTON DIVISION OF GEOLOGY AND EARTH RESOURCES INFORMATION CIRCULAR 60, P. 17 - 26. (71 p.)

  • Production

    MOEN, 1977

General comments

Subject category Comment text
Deposit QUARTZ VEINLETS ALONG A FRACTURE ZONE IN QUARTZ MONZONITE.
Deposit SEE ALSO MRDS RECORD M700154

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-81 Caress, Mary E. (Evarts, Russ) U.S. Geological Survey
Updater 01-NOV-92 Peterson, Jocelyn A. U.S. Geological Survey
Reporter 13-OCT-92 Ridenour, James U.S. Bureau of Mines
Updater 20-MAY-09 Causey, J. Douglas U.S. Geological Survey