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Jefferson Lake Vorhees

Producer in Calaveras county in California, United States with commodity Asbestos
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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. Ownership information
  10. Links to other databases
  11. Bibliographic references
  12. General comments
  13. Reporter information

Geologic information

Identification information

Deposit ID 10029293
MRDS ID M006741
Record type Site
Current site name Jefferson Lake Vorhees
Alternate or previous names Pacific Asbestos Co.
Related records 10211280

Geographic coordinates

Point of reference Centroid
Geographic coordinates: -120.53387, 37.92433 (WGS84)
Relative position Original record had no geographic coordinates; these coordinates were derived from the PLSS description provided.

Site location context

Political divisions (FIPS codes)

Tuolumne(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

New Melones Dam(quadrangle 1:24,000 scale)

Oakdale(quadrangle 1:100,000 scale)

San Jose(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Stanislaus(hydrologic unit)

San Joaquin(hydrologic accounting unit)

San Joaquin(hydrologic subregion)

California(hydrologic region)

Federal lands

USBR(Federal land areas administered by USBR)

Geographic areas

Country State County
United States California Calaveras

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 001N 013E 15,16,21,22 California

Commodities

Commodity Importance
Asbestos Primary

Nearby scientific data

Centroid (1) -120.53387, 37.92433
ListMap

Economic information

Economic information about the deposit and operations

Development status Producer
Commodity type Non-metallic
Significant No

Ownership information

  • Type Owner
    Owner American Asbestos Mining Corp.

Comments on the production information

  • 1300 TONS MILLED IN 1921; INTERMITTENT 1904-27. STATE'S MAJOR PRODUCER IN 1963

Comments on the workings information

  • DRILL-CORE DATA HAVE INDICATED THAT IT CONTAINS AN OVERALL AVERAGE OF ABOUT 3 1/4% FIBER TO A DEPTH OF AT LEAST 200', BUT THE FIBER CONTENT IS NOT UNIFORM. PAC. ASBESTOS CO. DROVE 1000' OF ADITS ON VOORHEES DEPOSIT IN 1921.

Comments on development

  • SAYS AN ASBESTOS PROCESSING PLANT HAS BEEN BUILT. IT WILL PROCESS 2500 TONS OF ASBESTOS ORE PER DAY AND PRODUCE 70,000 TONS PER YEAR OF HIGH QUALITY ASBESTOS FIBER. ESTIMATED PROVED RESERVES OF 23 MILLION TONS. ABOUT 40% OF THE FINISHED ASBESTOS FIBER IS SCHEDULED FOR EXPORT. OPERATIONS CUT TO 1 SHIFT IN LATTER PART OF 1963 DUE TO DEPRESSED MARKET -MET. MNG MAY 1964 P. 62.

Reference information

Bibliographic references

  • Deposit

    CALIF. V. 32, NO. 3, P. 226-7

  • Deposit

    REPT. 21, P.163-4; B. 176, P. 53

  • Deposit

    MINING ENGINEERING, SEPT. 1962, P. 57-60, OCT. 1962, P. 84-89

  • Deposit

    NEVADA MINING ASSOCIATION, 1962, NEWSLETTER NO. 114: NEVADA MINING ASSOCIATION, SEPTEMBER 15, 1962.

General comments

Subject category Comment text
Deposit ADD. REF.: MINING WORLD, SEPT. 1962, P. 24-25; ENG. & MNG. JOUR., FEB. 1962, P. 26; MGN. CONG. JOUR., SEPT. 1961, P. 84; CALIF. B. 145 PL. 2; NEV. NEWSLETTER, 7-15-61, P. 4; E&MJ V. 161, NO. 1, 1960, P. 115; MIN. WORLD V. 25 NO.1, 1963, P. 39; USBM I.C. 7860, P. 12-14; CALIF. MIS V. 16, NO. 2, P. 5; MISV. 16, NO. 9, P. 4; USGS MR-17 MINING WORLD JUNE 1963, P. 43-44; CALIF. COUNTY REPT. NO. 2, P. 20,128 AND PL. D; MIN. INF SERVICE, V. 16, NO. 2, FEB. 1963, P. 5; MINING ENG. V. 15, NO. 2, 1963, P. 79; MW CATALOG, SURVEY & DIR. 1963, P. 79; NEVADA BUREAU OF MINES REPT. 13, PART B, P. 2, 4; USGS MAP GP-561
Deposit CRYSOTILE ASBESTOS OCCURS IN SERPENTINE BELT; IS OF GOOD QUALITY AND OCCURS AS STOCKWORK CROSS FIBER VEINS IN MASSIVE PALE GREEN SERPENTINE. MOST OF THE FIBERS ARE BETWEEN 1/16 AND 1/4" LONG, BUT A SMALL PERCENTAGE ARE UP TO ABOUT 3/4" IN LENGTH. ORE BODY IS APPROX. 1700' LONG AND FROM 300-600' WIDE. NO TREMOLITE OR MICA; MAGNETITE IS LOW.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-72 Gere, W. U.S. Geological Survey

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.