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McIlroy property

Past Producer in Inyo county in California, United States with commodities Talc-Soapstone, 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. Materials information
  8. Host and associated rocks
  9. Nearby scientific data
  10. Geologic structures
  11. Ore body information
  12. Economic information about the deposit and operations
  13. Land status
  14. Ownership information
  15. Workings at the site
  16. Bibliographic references
  17. Reporter information

Geologic information

Identification information

Deposit ID 10400453
Record type Site
Current site name McIlroy property

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -117.91703, 36.53643 (WGS84)
Location accuracy 10(meters)
Relative position Adit entrance (by GPS, collected in field by B.S. Van Gosen, Sept. 2010)

Site location context

Political divisions (FIPS codes)

Inyo(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Dolomite(quadrangle 1:24,000 scale)

Saline Valley(quadrangle 1:100,000 scale)

Death Valley(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Owens Lake(hydrologic unit)

Mono-Owens Lakes(hydrologic accounting unit)

Northern Mojave-Mono Lake(hydrologic subregion)

California(hydrologic region)

Federal lands

Bureau of Land Management(Bureau of Land Management CA)

Bureau of Land Management CA BLM(Type of land area)

BLM(Federal land areas administered by BLM)

Geographic areas

Country State County
United States California Inyo

Public Land Survey System information

Meridian Township Range Section Fraction State
San Bernardino 016 S 037 E 14 SE4 California

Comments on the location information

  • Location description in Bowles, 1955 is incorrect. Correct location is about 3 mi. NW of Keeler on Hwy 136, then north about 1/4 mi on an inaccessible track (shown as a unmaintained road) to an adit on the Dolomite 7 1/2-minute topographic map, 1987. (2 adits are shown on the topo in the SE quarter section, this is the one farther west)

Commodities

Commodity Importance
Talc-Soapstone Primary
Asbestos Primary

Materials information

Materials Type of material
Tremolite Ore

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate
    Rock type qualifier dolomitic limestone

Nearby scientific data

Main Entrance (1) -117.91703, 36.53643
ListMap

Economic information

Geologic structures

Type of structure Local
Structure name fault zones

Ore body information

  • General form veins
    Width 0.3M

Comments on the geologic information

  • Tremolite asbestos veins in shear zones within dolomitic limestone. Some near vertical veins, at least 1 ft. in width, exposed in the roof of the tunnel. (B.S. Van Gosen, USGS, site visit)

Economic information about the deposit and operations

Operation type Underground
Development status Past Producer
Significant No
Production years 1940, 1941

Land status

Ownership category BLM Administrative Area

Ownership information

  • Type Owner
    Owner Mr. McIlroy (deceased)
    Home office Lone Pine, CA
    Year 2010

Comments on the production information

  • Small shipments of asbestos were made to eastern U.S. for filter use in 1940 and 1941. Both long slip-fiber and cross-fiber asbestos are present. (Bowles, 1955, p. 25)

Workings at the site

  • Type of workings Underground
    Name of workings unnamed adit

Reference information

Bibliographic references

  • Deposit

    Bowles, Oliver, 1955, The asbestos industry: U.S. Bureau of MInes Bulletin 552, p. 25.

  • Deposit

    Norman, L.A., and Stewart, R.M., 1951, Mines and mineral resources of Inyo County: California Journal of Mines and Geology, v. 47, no. 1, p. 98, 203.

  • Deposit

    Chidester, A.H., and Shride, A.F., 1962, Asbestos in the United States--Exclusive of Alaska and Hawaii: U.S. Geological Survey Mineral Investigations Resource Map MR-17, scale 1:3,168,000, includes 11 p. pamphlet.

Reporter information

Type Date Name Affiliation Comment
Reporter 23-SEP-10 Van Gosen, Bradley S. 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.