Boise - Rochester Mine

Past Producer in Elmore county in Idaho, United States with commodities Gold, Silver, Sulfur

Geologic information

Identification information

Deposit ID 10070036
MRDS ID W007883
Record type Site
Current site name Boise - Rochester Mine
Alternate or previous names Bagdad Chase, General Pettit Lombard, Stedtman, Old Chunk

Geographic coordinates

Geographic coordinates: -115.10813, 43.78659 (WGS84)
Elevation 1881
Relative position 1.5 MI SE OF ATLANTA
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Geographic areas

Country State County
United States Idaho Elmore

Public Land Survey System information

Meridian Township Range Section Fraction State
Boise 005N 011E 11 Idaho

Comments on the location information

  • ADJOINS THE MONARCH PROPERTY ON THE NE. ; FROM E. CREST OF ATLANTA HILL TO BOTTOM OF MONTEZUMA GULCH (2700 FT.)

Commodities

Commodity Importance
Gold Primary
Silver Primary
Sulfur Tertiary

Materials information

Materials Type of material
Miargyrite Ore
Polybasite Ore
Proustite Ore
Pyrargyrite Ore
Silver Ore
Gypsum Gangue
Pyrite Gangue
Quartz Gangue

Alteration

  • (Local) Sericitization, Oxidation , Silicification, Gouge, Brecciation

Analytical data

Result CONCENTRATE VALUED AT $40 - $140 PER TON, MILL - HEAD VALUES $7 - $10/TON . AU ASSAYS FROM .328 TO .4614 OZ./TON
Result AG ASSAYS FROM 1.038 TO 1.734 OZ./TON

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Rock unit name Idaho Batholith;Idaho Batholith
    Rock description Idaho Batholith;Idaho Batholith

Nearby scientific data

(1) -115.10813, 43.78659

Ore body information

  • General form LENTICULAR
    Strike N 50 DEG E
    Dip 75 DEG NW
    Depth to bottom 274.32M
    Width 24.38M
    Length 243.84M
  • General form LENTICULAR
    Dip 75 DEG NW

Controls for ore emplacement

  • Fissures; Shear Zones

Economic information

Economic information about the deposit and operations

Development status Past Producer
Commodity type Both metallic and non-metallic
Deposit size Medium
Significant No
Discovery method Ore-Mineral In Place
Year of first production 1869

Mining district

District name Atlanta District Or Middle Boise District

Land status

Ownership category National Forest
Area name Boise National Forest

Ownership information

  • Type Owner-Operator
    Owner Talache Mines Inc.

Production statistics

  • Year 1936
    Period 1870 - 1936
    Material ORE AU/AG
    Accuracy Accurate
    Description Cp_Grade: ^0.328 To 0.4614 Oz. Au Per Ton, Ag
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 11g/mt

Comments on the production information

  • ABOUT $1,000,000 TOTAL PRODUCTION (TO 1928). PRODUCTION PROBABLY EXCEEDS $2,500,000. HIGH AND LOW GRADE ORES MIXED. PRODUCTION INTERMITTENT - 1870 - 1936 .

Workings at the site

  • Type of workings Underground
    Length 4267.2M
    Overall depth 335.28M

Comments on development

  • 40-STAMP MILL; POWER PLANT; 150-TON CYANIDE PLANT; 100-TON FLOTATION PLANT. ST. JOSEPH LEAD CO. CONTROLLED OVER 10 PATENTED AND 19 UNPATENTED CLAIMS, INCLUDING OTHER PROPERTIES ; ECON.COM: ORE DIFFICULT TO TREAT, ONLY 1/2 OF CONTENTS AMENABLE TO PLATE AMALGAMATION; THE METHODS OF CONCENTRATION AND CYANIDING THE CONCENTRATES GAVE UNSATISFACTORY RESULTS.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS W007883
Idaho Geological Survey Idaho Mines and Prospects IMP HA__62 http://www.idahogeology.org/

Bibliographic references

  • Deposit

    BALLARD, S. M., 1928, GEOLOGY AND ORE DEPOSITS OF THE ROCKY BAR QUADRANGLE: IDAHO BUREAU OF MINES & GEOL. PAM. 26, P. 33

  • Deposit

    ANDERSON, A.L., 1939, GEOLOGY AND ORE DEPOSITS OF THE ATLANTA DISTRICT, ELMORE COUNTY, IDAHO: IDAHO BUREAU OF MINES AND GEOLOGY PAMPHLET 49, 71 P.

  • Deposit

    1917 DIREXPL ST. JOSEPH LEAD COMPANY

  • Deposit

    1928 GEOLMAP IDAHO BUREAU OF MINES AND GEOLOGY PAMPHLET 26

  • Deposit

    1939 GEOLMAP IDAHO BUREAU OF MINES AND GEOLOGY PAMPHLET 49

  • Production

    BALLARD, S. M. 1928, IDAHO BUREAU OF MINES & GEOL. PAM. 26, P. 33; ANDERSON, A.L., 1939, IDAHO BUREAU OF MINES AND GEOLOGY PAMPHLET 49, 71 P.

General comments

Subject category Comment text
Deposit UPPER PART OF OLD CHUNK ORE DIPS STEEPLY SE

Reporter information

Type Date Name Affiliation Comment
Reporter 01-OCT-1975 Steigner, William D. U.S. Geological Survey
Updater 01-AUG-1976 Everett, Sandra E. U.S. Geological Survey
Updater 01-FEB-1993 Frank, Dave U.S. Geological Survey