Hot Springs Dome Prospect

Occurrence in Alaska, United States with commodities Gold, Silver, Copper, Lead, Cobalt, Nickel, REE, Manganese

Geologic information

Identification information

Deposit ID 10002734
MRDS ID A015182
Record type Site
Current site name Hot Springs Dome Prospect
Alternate or previous names Barrett Prospect

Geographic coordinates

Geographic coordinates: -150.74749, 65.02878 (WGS84)
Location accuracy 1000(meters)
Relative position 4 MILES NW OF MANLEY HOT SPRINGS.
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Geographic areas

Country State
United States Alaska

Comments on the location information

  • USGS MF-371, LOC. 6. PROSPECT JUST NORTH OF A LARGE BODY OF BIOTITE GRANITE THAT FORMS THE SOUTH SLOPES OF HOT SPRINGS DOME AND EXTENDS NW AND SE FOR ABOUT 10 MILES. 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
Copper Secondary
Lead Secondary
Cobalt Secondary
Nickel Tertiary
REE Tertiary
Manganese Tertiary

Comments on the commodity information

  • ANALYSIS' FROM USBM SAMPLES.

Materials information

Materials Type of material
Chalcopyrite Ore
Gold Ore
Monazite Ore
Silver Ore
Calcite Gangue
Goethite Gangue
Hematite Gangue
Limonite Gangue
Pyrite Gangue
Pyrrhotite Gangue
Quartz Gangue
Siderite Gangue

Alteration

  • (Local) Except For A Few Pockets Containing Small Amounts Of Galena, Pyrrhotite, Chalcopyrite, And Pyrite, All Metallic Minerals Were Oxidized.

Analytical data

Result AU: .17 OZ./TON, AG: .53 OZ./TON, CO: .02%, PB: 3.7% CU: 1.2%. SEE REF. 4.

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Argillite

Nearby scientific data

(1) -150.74749, 65.02878

Ore body information

  • General form BALLS
    Thickness 135.94M
    Width 15.24M
    Length 609.6M

Controls for ore emplacement

  • Granitic Pluton

Comments on the geologic information

  • GEOL.COM: MINERALIZATION ROUGHLY PARALLEL TO THE CONTACT WITH LARGE TERTIARY BIOTITE GRANITE INTRUSIVE. MINERALIZATION IN METAMORPHOSED JURA-CRETACEOUS SEDIMENTARY ROCKS

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No

Comments on the workings information

  • WORKINGS CAVED IN BY 1931.

Comments on development

  • EXPLORATION BY 3 SHAFTS ABOUT 20 FT. DEEP, AN ADIT 20 FT. LONG, AND SEVERAL TRENCHES AND PROSPECT PITS. CLAIMS ON BARRETT PROSPECT STAKED IN 1914 AND 1924; PATENTED, 1937. NO PRODUCTION. USBM DRILLED 8 DIAMOND-DRILL HOLES IN 1954 WITH A TOTAL LENGTH OF 3,198 FT.; DEEPEST PENETRATION WAS 515 FT., WHICH BOTTOMED OUT 446 FT. BELOW THE SURFACE.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A015182

Bibliographic references

  • Deposit

    USGS MF-371 (A-2), LOC. 6.

  • Deposit

    USGS BULL. 844-D, P. 215-216.

  • Deposit

    USGS BULL. 1058-I, P. 369-370

  • Deposit

    USBM OF 8-71, 1971.

General comments

Subject category Comment text
Deposit THIS SITE NAME WAS CREATED BY THE REPORTER OR OTHER USGS EMPLOYEE BASED ON PROXIMITY TO SOME MAJOR GEOGRAPHIC FEATURE.
Deposit LOW-GRADE MINERALIZED BELT IN SHEARED METASEDIMENTARY ROCKS PARALLEL TO A BIOTITE GRANITE INTRUSIVE CONTAINS AT LEAST 6 GOLD-SILVER LODES. BARRETT PROSPECT CONTAINS ARGENTIFEROUS GALENA, LIMONITE, AND MINOR AMOUNTS OF GOLD, HEMATITE, CHALCOPYRITE, CHALCOCITE, PYRRHOTITE, PYRITE, AND SECONDARY COPPER MINERALS, AND ERYTHRITE (PINK COBALT BLOOM). SURFACE ORE IS ESSENTIALLY VEINS OF GALENA AND POCKETS OF LIMONITE. NATIVE SILVER IN SMALL BALLS AT SURFACE OF LODE. NICKEL REPORTED IN PYRRHOTITE BEARING BASALT DIKE SOUTH OF BARRETT PROSPECT. SAMPLE FROM A DIKE THAT CUTS GRANITE CONTAINED MONAZITE. DIKES 3 IN. TO 4 FT. THICK CONTAIN AS MUCH AS 15% TOURMALINE.
Deposit MINERALIZATION SURROUNDS SUMMIT OF MANLY HOT SPRINGS DOME. EXPOSURE OF MINERALIZATION IS POOR. ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1987 Powers, M.T. (Huber, D.F.) U.S. Geological Survey
Editor 20-SEP-1994 Mosier, Dan U.S. Geological Survey PARSED OUT HOST ROCK AND ASSOCIATED ROCK TYPES, AGES, UNIT NAMES, AND UNIT AGES.