Jamestown Mine

Producer in Tuolumne county in California, United States with commodities Gold, Silver

Geologic information

Identification information

Deposit ID 10072448
MRDS ID W017801
Record type Site
Current site name Jamestown Mine
Alternate or previous names Includes Harvard, Crystalline, Dutch App, Nyman, Jumper, And Rawhide Mines

Geographic coordinates

Geographic coordinates: -120.41767, 37.94992 (WGS84)
Location accuracy 1000(meters)
Relative position ABOUT 1 MILE WEST OF JAMESTOWN, EXTENDING ABOUT 5 MILES ALONG A NW-SE LINE, Est Coordinates Are For The Town Of Jamestown, About One Mile East Of Deposit
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Geographic areas

Country State County
United States California Tuolumne

Commodities

Commodity Importance
Gold Primary
Silver Secondary

Materials information

Materials Type of material
Gold Ore
Pyrite Ore
Silver Ore
Ankerite Gangue
Quartz Gangue
Sericite Gangue
Talc Gangue

Alteration

  • (Local) Carbonatization

Mineral occurrence model information

Model code 273
USGS model code 36a
Deposit model name Low-sulfide Au-quartz vein
Mark3 model number 27

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Schist
    Stratigraphic age (youngest) Late Jurassic
  • Host or associated Host
    Rock type Metamorphic Rock > Serpentinite

Nearby scientific data

(1) -120.41767, 37.94992

Geologic structures

Type of structure Regional
Structure description Melones Fault Zone

Controls for ore emplacement

  • Mother Lode Quartz Vein

Economic information

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Large
Significant Yes
Discovery year 1850
Year of first production 1899

Mining district

District name Jamestown

Ownership information

  • Type Owner
    Owner Sonora Mining Corp., Subsid. Of Sonora Gold Corp.

Production statistics

  • Year 1916
    Period 1899-1916
    Material AU
    Accuracy Estimate
    Description Cp_Grade: ^0.12 Oz/Ton Au
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Gold Gold 3g/mt

Reserves and resources

  • Type In-situ
    Estimate year 1987
    Commodity Subtype Grade units Group Importance Year
    Gold Au 2.061 g/mt Gold Major 1987
  • Type In-situ
    Estimate year 1987
    Commodity Subtype Grade units Group Importance Year
    Gold Au 1.468 g/mt Gold Major 1987
  • Type In-situ
    Estimate year 1987
    Commodity Subtype Grade units Group Importance Year
    Gold Au 1.863 g/mt Gold Major 1987
  • Type In-situ
    Estimate year 1987
    Commodity Subtype Grade units Group Importance Year
    Gold Au 1.468 g/mt Gold Major 1987
  • Type In-situ
    Estimate year 1987
    Commodity Subtype Grade units Group Importance Year
    Gold Au 1.44 g/mt Gold Major 1987
  • Type In-situ
    Estimate year 1987
    Commodity Subtype Grade units Group Importance Year
    Gold Au 1.863 g/mt Gold Major 1987

Comments on the reserve resource information

  • LINE 1: HARVARD MINE; LINE 2: CRYSTALLINE MINE; LINE 3: DUTCH APP MINE; LINE 4: NYMAN MINE; LINE 5: JUMPER MINE; LINE 6: RAWHIDE MINE.

Comments on development

  • LARGEST GOLD FLOTATION MILL IN U. S.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS W017801

Bibliographic references

  • Deposit

    MINING MAGAZINE, JAN., 1988, P. 50.

  • Deposit

    BLISS, JAMES D., AND JONES, GAIL M., 1988, MINERALOGIC AND GRADE-TONNAGE INFORMATION ON LOW-SULFIDE AU-QUARTZ VEINS: U. S. GEOLOGICAL SURVEY OPEN-FILE REPORT 88-229, 99 P.

  • Deposit

    JULIHN, C. E., AND HORTON, F. W., 1940, MINES OF THE SOUTHERN MOTHER LODE REGION, PART II-TUOLUMNE AND MARIPOSA COUNTIES: U. S. BUREAU OF MINES BULLETIN 424, 179 P.

  • Deposit

    ARGALL, GEORGE O., JR., 1987, SONORA GOLD MAKES FLOTATION CONCENTRATES AT JAMESTOWN: ENGINEERING AND MINING JOURNAL, DEC., P. 38-39.

  • Deposit

    ALLGOOD, G. M., LOVEJOY, M. E., AND ALLGOOD, R. W., 1985, JAMESTOWN GOLD MINE, TUOLUMNE COUNTY, CALIFORNIA: SONORA MINING CORPORATION, 6 P.

  • Deposit

    SKILLINGS' MINING REVIEW STAFF, 1984, SONORA GOLD CORP.'S PROJECT FOR OCT. 1984-START UP IN MOTHER LODE: VOL. 73, NO. 20, MAY 19, P. 2-4.

  • Production

    ALLGOOD AND OTHERS, 1985.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JAN-76 Weeks, Robert U.S. Geological Survey
Updater 01-AUG-88 Paidakovich, Matthew E. U.S. Geological Survey