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Iron Mountain Mine

Past Producer in Llano county in Texas, United States with commodity Iron
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Host and associated rocks
  8. Nearby scientific data
  9. Ore body information
  10. Economic information about the deposit and operations
  11. Land status
  12. Links to other databases
  13. Bibliographic references
  14. Reporter information

Geologic information

Identification information

Deposit ID 10065175
MRDS ID TC40215
Record type Site
Current site name Iron Mountain Mine

Geographic coordinates

Geographic coordinates: -98.83506, 30.8627 (WGS84)
Elevation 411
Location accuracy 250(meters)
Relative position 12 MI NW OF LLANO

Site location context

Political divisions (FIPS codes)

Llano(county)

Texas(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Valley Spring(quadrangle 1:24,000 scale)

Llano(quadrangle 1:100,000 scale)

Llano(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Llano(hydrologic unit)

Middle Colorado-Llano(hydrologic accounting unit)

Lower Colorado-San Bernard Coastal(hydrologic subregion)

Texas-Gulf(hydrologic region)

Geographic areas

Country State County
United States Texas Llano

Comments on the location information

  • 1 MI N70W OF VALLLEY SPRING, 100 YDS SW FM 734.

Commodities

Commodity Importance
Iron Primary

Materials information

Materials Type of material
Magnetite Ore

Analytical data

Result 60-65% FE, <0.10% S, <0.35% P, <6% SIO2.

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Gneiss
    Rock unit name Valley Spring Gneiss
    Rock description Valley Spring Gneiss
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic

Nearby scientific data

(1) -98.83506, 30.8627
ListMap

Economic information

Ore body information

  • General form LENSE

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Significant No
Discovery year 1890
Production years LATE 1930'S, 1942-1946, ?-1958

Land status

Ownership category Private

Comments on the production information

  • SMALL QUANTITY OF ORE PRODUCED IN LATE 1930'S. SEVERAL HUNDRED TONS MINED 1942-1946.

Comments on the workings information

  • A 100 FT SHAFT WITH 250 FT OF TUNNELS ON 50 FT AND 100 FT LEVELS. MOST PRODUCTION FROM OPEN PIT WHICH WAS 35 FT DEEP IN 1946.

Comments on development

  • TEST PITS DUG 1890. ACTIVE EXPLORATION 1908-1909 INCLUDING 100 FT SHAFT, 250 FT TUNNELS, 6 DIAMOND DRILL HOLES. DIP-NEEDLE AND GRAVITY SURVEY 1943. USBM UNDERGROUND SAMPLING AND 1623 FT DIAMOND DRILLING 1944. ECONOMIC COMMENTS: MOST OF ORE PRODUCED WAS USED FOR HEAVY CONCRETE AGGREGATE.

Reference information

Bibliographic references

Reporter information

Type Date Name Affiliation Comment
Reporter 01-SEP-94 Long, Keith R. U.S. Geological Survey

Beyond USGS

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

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