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Jamestown Mine

Plant in Tuolumne county in California, 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. Public Land Survey System information
  6. Commodities
  7. Nearby scientific data
  8. Economic information about the deposit and operations
  9. Mining district
  10. Mineral rights holdings
  11. Land status
  12. Ownership information
  13. Reserves and resources
  14. Workings at the site
  15. Links to other databases
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10238351
MRDS ID W026030
MAS/MILS ID 0061090892
Record type Site
Current site name Jamestown Mine
Alternate or previous names Jamestown, See Comments
Related records 10077946, 10165658

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -120.4379, 37.94572 (WGS84)
Elevation 500
Location accuracy 10000(meters)

Site location context

Political divisions (FIPS codes)

Tuolumne(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Sonora(quadrangle 1:24,000 scale)

Oakdale(quadrangle 1:100,000 scale)

San Jose(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Tuolumne(hydrologic unit)

San Joaquin(hydrologic accounting unit)

San Joaquin(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Tuolumne

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 001 N 014 E 16 N2 California

Commodities

Commodity Importance
Gold Primary
Silver Primary

Nearby scientific data

Main Entrance (1) -120.4379, 37.94572
ListMap

Economic information

Comments on the geologic information

  • GEOLOGIC/LITHOLOGIC/MINERALS DATA FOR THE AREA CAN BE FOUND ON THE HARVARD MAS LISTING.

Economic information about the deposit and operations

Operation type Surface
Development status Plant
Commodity type Metallic
Deposit size Medium
Significant No
Discovery year 1848
Year of first production 1891
Plant type Leach
Plant subcategory Precipitation
Milling method Flotation

Mining district

District name Jamestown Area

Mineral rights holdings

Type of mineral rights Private Lease
Type of mineral rights Fee Ownership
Type of mineral rights Minerals Only

Land status

Ownership category Private

Ownership information

  • Type Owner-Operator
    Owner Sonora Gold Mining Corp.
    Interest 70
    Home office Canada
    Year 1986
  • Type Owner
    Owner Pathfinder Gold Corp.
    Interest 30
    Home office Nevada
    Year 1986

Reserves and resources

  • Type In-situ
    Estimate year 1986
    Measured 12949000mt ore
    Indicated 3556200mt ore
    Demonstrated 16505200mt ore
    Total resources 16505200mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 2.515 g/mt Gold Major 1986
  • Type In-situ
    Estimate year 1986
    Measured 2035000mt ore
    Demonstrated 2035000mt ore
    Total resources 2035000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 1.792 g/mt Gold Major 1986
  • Type In-situ
    Estimate year 1986
    Measured 6398000mt ore
    Indicated 6318899mt ore
    Demonstrated 12716899mt ore
    Total resources 12716899mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 2.274 g/mt Gold Major 1986
    Gold Au 4.135 g/mt Gold Major 1986
  • Type In-situ
    Estimate year 1986
    Measured 2568200mt ore
    Demonstrated 2568200mt ore
    Total resources 2568200mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 1.792 g/mt Gold Major 1986
  • Type In-situ
    Estimate year 1986
    Measured 1531900mt ore
    Demonstrated 1531900mt ore
    Total resources 1531900mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 1.757 g/mt Gold Major 1986
  • Type In-situ
    Estimate year 1986
    Measured 1503100mt ore
    Indicated 1814400mt ore
    Demonstrated 3317500mt ore
    Total resources 3317500mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 2.274 g/mt Gold Major 1986
    Gold Au 6.202 g/mt Gold Major 1986

Comments on the reserve resource information

  • THIS MAS PROPERTY HAS 1986 RESERVE DATA FOR THE OTHER DEPOSITS. OPERATIONS CEASED IN MID 1994. RECLAMATION IS ONGOING AND IS EXPECTED TO CONTINUE THROUGH 1996.

Workings at the site

  • Type of workings Surface
    Area 202.4HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ACTUAL
    Mining Method OPEN PIT
    Swell Factor .65
    Hardness of Ore M-HARD ROCKS
    Max. Pit Slope (degrees) 44
    Capacity 5443
    Capacity Units MT ORE/DAY
    Year of Information 1986

Comments on the workings information

  • THIS PROPERTY COVERS MOSTLY THE ENVIRONMENTAL FACTORS OF THIS AREA.

Reference information

Bibliographic references

  • Deposit

    INTERNATIONAL MINING , P.24-26, 9/86.

  • Deposit

    ABM MINING GROUP INC, GOLD PROPERTIES UPDATE, 1986

  • Deposit

    SIERRA JOURNAL, VOL 2, NO 21, P.1, 5/22/86.

  • Deposit

    SONORA CORPORATE PROFILE, 1986.

  • Deposit

    SONORA GOLD CORP, NEWSLETTER NO 20, 6/5/86.

  • Deposit

    MINING JOURNAL, P.367,11/8/85.

  • Deposit

    MINING JOURNAL, P.103, 2/7/86.

  • Deposit

    THE NORTHERN MINER, VOL 72, NO 41, P.1, 12/22/86.

  • Deposit

    THE MINING JOURNAL, P.403, 12/26/86 .

  • Deposit

    GEOLOGY OF THE JAMESTOWN MINE AREA, MOTHER LODE GOLD BELT,

  • Deposit

    TUOLUMNE COUNTY, CALIF, BY P.H.DOHMS, R.D.HOAGLAND, CONDOR

  • Deposit

    MINEERALS MANAGEMENT, AND G.M.ALLGOOD SONORA MINING CORP

  • Deposit

    GEOLOGY AND MINERAL DEPOSITS OF ANGEL CAMP AND SONORA

  • Deposit

    QUADRANGLES, CALAVERAS & TUOLUMNE COUNTIES, CALIF.

  • Deposit

    CALIF DIV OF MINES & GEOL SPECIAL REPORT 41, 1955.

  • Deposit

    ECONOMIC GEOLOGY, VOL 76, NO 4, JUNE-JULY 1981, P.765.

  • Deposit

    CALIF DIV OF MINES & GEOL BULLETIN 193, P.5.

  • Deposit

    CALIF. DIV. MINES AND GEOL. SPECIAL PUBL. 103, 1990.

  • Deposit

    EIS REPORT, 1990 SONORA GOLD MINING CORP.

General comments

Subject category Comment text
Deposit MAS PROPERTY LISTING FOR FOUR DEPOSIT/ORE BODIES OF THE MOTHER LODE GOLD BELT - JAMESTOWN AREA. THESE DEPOSITS/ORE BODIES HAD SEPARPATE MAS SEQ#: APP #0061090122 CRYSTALLINE #0061090151 DUTCH #0061090188 NYMAN #0061090192 ALL THESE PROPERTIES WERE OR WILL BE PART OF THE JAMESTOWN MINE. THESE SEQ# WILL BE DELETED (04/95). IT IS ALSO POSSIBLE THE THE HARVARD MINE AND THIS PROPERTY ARE ALSO THE SAME DEPOSIT, BUT SEPARATE OPERATIONS FEEDING A SINGLE MILL, THIS IS NOT VERY CLEAR, PROPERIES HAVE NOT BEEN SITE VISITED SINCE 1983. IT IS ALSO NOT VERY CLEAR IF THE JUMPER AND RAWHIDE DEPOSITS/ MINES/ORE BODIES ARE OR WILL BE INCLUDED IN THE JAMESTOWN OR HARVARD OPERATIONS. HOWEVER ALL WILL PROBOBLY FEED ONE MILL. THESE THREE PROPERTIES WILL BE LEFT ON THE MAS DB UNTIL MORE INFORMATION IS AVAILABLE. THE MSHA.DBF LISTING OF 03/95 HAS TWO ID # FOR JAMESTOWN 0404695 AND 0470444. IT IS VERY POSSIBLE THAT ONE # IS FOR THE MINE THE OTHER FOR MILL. BOTH # WILL BE USED 0404695 THE RES_ID AND 0470444 MINES ID.

Reporter information

Type Date Name Affiliation Comment
Reporter 30-SEP-1996 Spear, James M. U.S. Bureau of Mines

Beyond USGS

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

Maps centered on this site

Authoritative California resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.