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Maggie Sink Mine (Bobs)

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. Production statistics
  19. Workings at the site
  20. Links to other databases
  21. Bibliographic references
  22. General comments
  23. Reporter information

Geologic information

Identification information

Deposit ID 10040387
MRDS ID M055138
MAS/MILS ID 480430029
Record type Site
Current site name Maggie Sink Mine (Bobs)
Alternate or previous names Maggie Mine, Neyland-Davis, Alpine, Bobs, Mitchell-Gillette, Maggie Sink, Louisa, Bobs Mine
Related records 10130187

Comments on the site identification

  • The Bobs Mine contains the Maggie Sink, not to be confused with the Margaret D (also known as the Maggie D) Lode.

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -103.72333, 29.32178 (WGS84)
Elevation 1082
Location accuracy 500(meters)
Relative position 7 MI W OF TERLINGUA. SE of the Sample Group. Coordinates are for unnamed "Mine" symbol on toopo at NW end of Lone Star Mine area.

Site location context

Political divisions (FIPS codes)

Brewster(county)

Texas(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Amarilla Mountain(quadrangle 1:24,000 scale)

Chisos Mountains(quadrangle 1:100,000 scale)

Emory Peak(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Black Hills-Fresno(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

  • LATITUDE AND LONGITUDE FOR CENTER OF DISTRICT. DISTRICT LOCATED IN BLOCK G4, SECTIONS 216, 238, 295 AND BLOCK G12, SECTIONS 38, 59, 70.
  • IN SECTIONS 44 AND 57, BLK G-12

Commodities

Commodity Importance
Mercury Primary

Materials information

Materials Type of material
Cinnabar Ore
Calcite Gangue

Alteration

  • (Local) Kaolinization Of Del Rio Clay

Analytical data

Result ORES FROM LOUISA CLAIM ASSAYED 45 LBS HG/ST

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone
    Rock unit name Santa Elena Limestone
    Rock description Santa Elena Limestone
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Pyroclastic Rock > Volcanic Breccia (Agglomerate)

Nearby scientific data

Main Entrance (1) -103.72333, 29.32178
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Breccia Pipe

Ore body information

  • General form PIPE
    Length 163.07M
    Width 64.01M

Controls for ore emplacement

  • Breccia Pipe In Limestone

Comments on the geologic information

  • THICK SEQUENCES OF CRET LIMESTONES AND SHALES ARE CUT BY NW STRIKING NORMAL FAULTS WITH HUNDREDS OF FEET OF DISPLACEMENT BORDER LONG NARROW GRABENS AND SMALLER MAGNITUDE NW TRENDING FAULTS. TERT BASALT AND TRACHYTE SILLS, PLUGS AND LACCOLITHS ARE PROMINENT. THE TERLINGUA ANTICLINE IS POSSIBLY UNDERLAIN BY A LACCOLITHIC INTRUSION. ; GEOL.DESC: THICK SEQUENCES OF CRET. LIMESTONES AND SHALES ARE CUT BY NW STRIKING NORMAL FAULTS WITH HUNDREDS OF FEET OF DISPLACEMENT BORDER LONG NARROW BRABENS AND SMALLER MAGNITUDE NW TRENDING FAULTS. TERTIARY BASALT AND TRACHYTE SILLS, PLUGS AND LACCOLITHS ARE PROMINENT. THE TERLINGUA ANTICLINE IS POSSIBLY UNDERLAIN BY A LACCOLITHIC INTRUSION.
  • BRECCIA PIPE ENCLOSED IN DEVILS RIVER LIMESTONE AND CONTAINING FRAGMENTS OF BOQUILLAS FLAGS BUDA LIMESTONE AND CHISOS FM SET IN A CLAY MATRIX OF THE GRAYSON FM (CRET). ALL UNITS EXCEPT CHISOS VOLCANICS ARE CRET. CHISOS VOLCANICS ARE TERTIARY.

Economic information about the deposit and operations

Operation type Surface-Underground
Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Terlingua

Mineral rights holdings

Type of mineral rights Private Lease

Land status

Ownership category Private

Ownership information

  • Type Operator
    Owner Continental Mining Co. Robert Pulliam , Lone Star Mercury, Inc.
    First year 1947
    Last year 1942
  • Type Owner
    Owner Robert Pulliam , Lone Star Mercury, Inc.
    First year 1947

Production statistics

  • Year 1960
    Period To 1960
    Material HG
    Accuracy Estimate
    Description Cp_Grade: ^4 Lb/Ton
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Mercury Mercury 1807g/mt

Workings at the site

  • Type of workings Surface/Underground
    Name of workings Large open pit, underground workings

Comments on the workings information

  • HUNDREDS OF SHAFTS, ADITS, PROSPECT PITS AND OPEN PITS.
  • ONE SHAFT, ONE ADIT (540 FT LONG, 135 FT BELOW BOTTOM OF SHAFT), OPEN PIT 30 FT DEEP.

Comments on development

  • DEPOSITS MINED BY COMANCHE INDIANS FOR WAR PAINT. KNOWN TO LOCALS AS EARLY AS 1840. FIRST PRODUCTION OF MERCURY IN 1888.
  • PROSPECTED DURING AND BEFORE WORLD WAR I. ; ECON.COM: LONE STAR MERCURY CO. INSTALLED A 35 ST/D GOULD FURNACE 1956 TO PRODUCE 40 TO 50 FLASKS HG PER WEEK.

Reference information

Bibliographic references

  • Deposit

    MINING WORLD, 1956, VOL. 18., NO. 4, P. 81

  • Deposit

    MINING WORLD, 1955, SEPT. P. 108.

  • Deposit

    BAILEY, E.H., USGS, PERSONAL FILES

  • Deposit

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

  • Deposit

    USGS PP 312, P. 87.

  • Deposit

    TX BEG MRC-73, P. 21.

  • Deposit

    EXAMINED BY C.P. ROSS AND OTHERS, 1934

  • Deposit

    EXAMINED BY R.G. YATES AND OTHERS, 1942-1945

  • Other Database

    CIMRI

  • Production

    USBM DATA

General comments

Subject category Comment text
Deposit DEPOSITS OCCURE AS LODES RELATED TO SOLUTION COLLAPSE ALONG THE SANTA ELENA LIMESTONE-DEL RIO CLAY CONTACT, CALCITE VEINS IN THE BOQUILLAS FORMATION AND BUDA LIMESTONE, SOLUTION-COLLAPSE BRECCIA PIPES IN THE SANTA ELENA LIMESTONE, DEL RIO CLAY, BUDA LIMESTONE, AND BOQUILLAS FORMATION, LODES ALONG SANTA ELENA-DEL RIO CONTACT, AND FRACTURE FILLINGS IN TERTIARY RHYOLITE INTRUSIVES.
Deposit CINNABAR REPLACES CLAY MATRIX OF A SOLUTION-COLLAPSE BRECCIA PIPE; SOME CALCITE-CINNABAR VEINS
Deposit THIS RECORD INCLUDES DATA FROM DUPLICATE RECORD M055137 BY JOEL R. BERGQUIST (73 09) WHICH HAS BEEN DELETED.

Reporter information

Type Date Name Affiliation Comment
Reporter 1973-09-01 Bergquist, Joel R. U.S. Geological Survey
Updater 1992-09-01 Long, Keith R. U.S. Geological Survey
Editor 2012-10-31 Wilson, Anna B U.S. Geological Survey
Reporter 1983-11-18 Garner U.S. Bureau of Mines MAS 0480430029 = 10130187

Beyond USGS

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

Maps centered on this site