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Two-Forty-Eight Mine

Past Producer in Brewster county in Texas, United States with commodity Mercury
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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. Alteration
  8. Host and associated rocks
  9. Nearby scientific data
  10. Geologic structures
  11. Ore body information
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Mining district
  15. Mineral rights holdings
  16. Land status
  17. Ownership information
  18. Workings at the site
  19. Links to other databases
  20. Bibliographic references
  21. General comments
  22. Reporter information

Geologic information

Identification information

Deposit ID 10103780
MRDS ID M055142
MAS/MILS ID 048-430043
Record type Site
Current site name Two-Forty-Eight Mine
Alternate or previous names Two Forty-Eight Mine, 248, Flecha, Half and Reid, Two Fourty Eight Mine, 248 Mine
Related records 10178762

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -103.5675, 29.32456 (WGS84)
Elevation 808
Location accuracy 100(meters)
Relative position 2 MI E OF TERLINGUA. Coordinates are for shalft labeled "Mine" north of the road at the southeastern end of Cigar Mountain.

Site location context

Political divisions (FIPS codes)

Brewster(county)

Texas(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Terlingua(quadrangle 1:24,000 scale)

Chisos Mountains(quadrangle 1:100,000 scale)

Emory Peak(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Terlingua(hydrologic unit)

Rio Grande-Amistad(hydrologic accounting unit)

Rio Grande-Amistad(hydrologic subregion)

Rio Grande(hydrologic region)

Geographic areas

Country State County
United States Texas Brewster

Comments on the location information

  • IN SEC 248, BLK G-4

Commodities

Commodity Importance
Mercury Primary

Materials information

Materials Type of material
Cinnabar Ore
Calcite Gangue
Gilsonite Gangue
Pyrite Gangue

Alteration

  • (Local) Argillic Alteration

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Gabbro
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Pliocene
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone
    Rock unit name Boquillas & Shale;Buda;Del Rio
    Rock description Boquillas & Shale;Buda;Del Rio

Nearby scientific data

Main Entrance (1) -103.5675, 29.32456
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Asymmetric Terlingua Anticline

Ore body information

  • General form PIPE
    Depth to top 0M

Controls for ore emplacement

  • Solution Collapse Breccia Pipe In Limestone

Comments on the geologic information

  • BRECCIA PIPE IS INTRUDED AT SEVERAL LEVELS BY SYENOGABBRO SILLS AND DIKES. ; GEOL.DESC: CRET. LIMESTONE AND SHALE IS CUT BY N-W TRENDING NORMAL FAULTS.
  • VERTICAL BRECCIA PIPE IN CRET BOQUILLAS FLAGS. BOQUILLAS FLAGS INTRUDED BY SYENOGABBRO AT 465 FEET BELOW SHAFT COLLAR

Economic information about the deposit and operations

Operation type Underground
Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1902
Year of first production 1926
Year of last production 1945
Production years 1926-1927, 1930-1931, 1935-1937, 1943, 1945

Mining district

District name Terlingua

Mineral rights holdings

Type of mineral rights Private Lease

Land status

Ownership category Private

Ownership information

  • Type Owner
    Owner Esperado Mining Co.
    Year 1965
  • Type Operator
    Owner Esperado Mining Co.
    First year 1940
    Last year 1946
  • Type Owner
    Owner E. A. Waldron
    First year 1946

Comments on the reserve resource information

  • ITEM 1 IS EQUIVALENT TO 500 FL.

Workings at the site

  • Type of workings Underground
    Overall depth 259.08M
    Overall length 2133.6M
  • Type of workings Underground
    Name of workings shaft and several levels

Comments on the workings information

  • MAIN SHAFT 804 FT DEEP, ANOTHER SHAFT 50 FT DEEP. MORE THAN 7000 FT OF WORKINGS ON 13 LEVELS.

Comments on development

  • ECON.COM: MINE HAD PROBLEMS WITH H2S GAS AND FLOODING. A 40 TPD HEERESCHOFF FURNACE INSTALLED 1940.

Reference information

Bibliographic references

  • Deposit

    BAILEY, E.H., USGS, PERSONAL FILES

  • Deposit

    CHESTER, J.W., 1965, MERCURY IN TEXAS: USBM IC 8252

  • Deposit

    USGS PP 312

  • Deposit

    TX BEG MRC-73, P. 20.

  • Deposit

    FIELD WORK BY C.P. ROSS AND OTHERS 1934.

  • Deposit

    FIELD WORK BY R.G. YATES, J.F. MCALLISTER, AND G.A. THOMPSON 1942-45.

  • Other Database

    CIMRI

  • Production

    USBM DATA

General comments

Subject category Comment text
Deposit FRACTURE FILLING AND REPLACEMENT IN AND ADJACENT TO A STEEP BRECCIA PIPE. PIPE IS AT LEAST 800 FT DEEP AND UP TO 100 FT IN DIAMETER.
Deposit THIS RECORD INCLUDES INFORMATION FROM DUPLICATE RECORD D002777 BY WILLIAM J. HASLER (77 06) WHICH HAS BEEN DELETED

Reporter information

Type Date Name Affiliation Comment
Reporter 1973-11-01 Bergquist, Joel R. U.S. Geological Survey
Updater 1992-09-01 Long, Keith R. U.S. Geological Survey
Reporter 2012-11-01 Wilson, Anna B U.S. Geological Survey merged and deleted duplicate record 10178762.
Reporter 1983-11-18 Garner U.S. Bureau of Mines MAS 0480430043 = 10178762

Beyond USGS

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

Maps centered on this site