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Mineral Hill Group Mine

Past Producer in Boise county in Idaho, United States with commodities Gold, Silver, Bismuth, Sulfides
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Materials information
  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. Mining district
  14. Land status
  15. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. Reporter information

Geologic information

Identification information

Deposit ID 10069870
MRDS ID W007611
Record type Site
Current site name Mineral Hill Group Mine
Related records 10265390

Geographic coordinates

Geographic coordinates: -115.90926, 43.98548 (WGS84)
Elevation 1524
Relative position 5 MI. NE OF PLACERVILLE

Site location context

Political divisions (FIPS codes)

Boise(county)

Idaho(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Placerville(quadrangle 1:24,000 scale)

Idaho City(quadrangle 1:100,000 scale)

Hailey(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Boise-Mores(hydrologic unit)

Middle Snake-Boise(hydrologic accounting unit)

Middle Snake(hydrologic subregion)

Pacific Northwest(hydrologic region)

Federal lands

Boise National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Idaho Boise

Public Land Survey System information

Meridian Township Range Section Fraction State
Boise 008N 005E 31 Idaho

Comments on the location information

  • ON DIVIDE BETWEEN HEADS OF ALDER AND OPHIR CREEKS.

Commodities

Commodity Importance
Gold Primary
Silver Secondary
Bismuth Critical Tertiary
Sulfides Tertiary

Comments on the commodity information

  • AU FORMERLY OBTAINED BY AMALGAMATION AVERAGED ABOUT 935 FINE.

Materials information

Materials Type of material
Bismuth Ore
Calcite Gangue
Pyrite Gangue
Quartz Gangue

Analytical data

Result SULPHIDES PANNED FROM THE GANGUE WITH A CONCENTRATION RATIO OF 7.4 TO 1, ASSAYED 7.60 OZ AU AND 0.8 OZ AG.

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite
    Rock unit name Dikes-Rhyolite Porphyry, Granophyre;Jur-Cret
    Rock description Dikes-Rhyolite Porphyry, Granophyre;Jur-Cret
    Stratigraphic age (youngest) Pliocene
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite
  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite

Nearby scientific data

(1) -115.90926, 43.98548
ListMap

Economic information

Ore body information

  • General form STRINGERS
    Strike N 40 DEG E
    Dip 70 DEG SE
    Length 48.77M
    Width 9.14M

Controls for ore emplacement

  • Fissure

Economic information about the deposit and operations

Development status Past Producer
Commodity type Both
Deposit size Small
Significant No

Mining district

District name Boise Basin

Land status

Ownership category Private

Comments on the production information

  • SLIGHTLY OVER $32,000 PRODUCED UNDER PRESENT MANAGEMENT. ADDITIONAL PRODUCTION BY FORMER OWNERS REPORTED AS $53,000

Workings at the site

  • Type of workings Underground
    Length 289.56M
    Overall depth 50.29M

Comments on development

  • 7 PATENTED AND 6 UNPATENTED CLAIMS. 50 - TON AMALGAMATION MILL AND ENTIRE SURFACE PLANT DESTROYED BY 1931 FOREST FIRE.

Reference information

Bibliographic references

  • Deposit

    BALLARD, S. M., 1924; GEOLOGY AND GOLD RESOURCES OF BOISE BASIN, BOISE COUNTY, IDAHO: ID. BUREAU OF MINES AND GEOL., BULL. NO. 9, 103 P.

  • Deposit

    ANDERSON, A.L., 1947, GEOLOGY AND ORE DEPOSITS OF BOISE BASIN, IDAHO: USGS BULL. 944-C, P. 282-283.

  • Deposit

    1924 GEOLMAP IDAHO BUREAU OF MINES, BULL. 9

  • Deposit

    1947 GEOLMAP ANDERSON, A.L., BULL. 944-C

  • Production

    BALLARD, S. M., 1924,: ID. BUREAU OF MINES AND GEOL., BULL. NO. 9, 103 P.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1975 Murphy, Lyn S. U.S. Geological Survey
Updater 01-AUG-1976 Everett, Sandra E. U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

External references

Maps centered on this site