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  3. Mineral Resource Data System (MRDS)

Sample Group 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. Host and associated rocks
  8. Nearby scientific data
  9. Ore body information
  10. Controls for ore emplacement
  11. Economic information about the deposit and operations
  12. Mining district
  13. Mineral rights holdings
  14. Land status
  15. Ownership information
  16. Workings at the site
  17. Links to other databases
  18. Bibliographic references
  19. Reporter information

Geologic information

Identification information

Deposit ID 10098449
MRDS ID M054800
MAS/MILS ID 480430038
Record type Site
Current site name Sample Group Mine
Alternate or previous names Duncan, Sample Group, Duncan Prospects

Geographic coordinates

Point of reference Claim
Geographic coordinates: -103.72889, 29.32595 (WGS84)
Elevation 1036
Location accuracy 500(meters)
Relative position 7 MI W OF TERLINGUA. in Sec. 44. Southeast of Duncan's Sample Group.

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

  • IN SEC 44, BLK G-12; SAMPLE GROUP CONSISTS OF 15 CLAIMS.

Commodities

Commodity Importance
Mercury Primary

Materials information

Materials Type of material
Cinnabar Ore
Calcite Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Unconsolidated Deposit > Clay, Mud
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone
    Rock unit name Santa Elena Limestone;Del Rio Clay
    Rock description Santa Elena Limestone;Del Rio Clay

Nearby scientific data

Claim (1) -103.72889, 29.32595
ListMap

Economic information

Ore body information

  • General form IRREGULAR

Controls for ore emplacement

  • Solution Collapse Structures Along Limestone-Shale Contact

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 Located Claim

Land status

Ownership category Private

Ownership information

  • Type Owner-Operator
    Owner Frank Duncan
    First year 1944

Workings at the site

  • Type of workings Surface/Underground
    Length 30.48M
    Overall depth 7.62M
  • Type of workings Surface/Underground
    Name of workings 100 ft adit, 25 ft. shaft, trenches

Comments on the workings information

  • A 25 FT SHAFT, 100 FT ADIT, AND AT LEAST 1000 FT OF TRENCHING.

Comments on development

  • PROSPECTED AS EARLY AS THE 1910'S ; ECON.COM: A 600 LBS/DY RETORT INSTALLED SOMETIME BEFORE 1944.

Reference information

Bibliographic references

Reporter information

Type Date Name Affiliation Comment
Reporter 1976-09-01 Peterson, Jocelyn A. U.S. Geological Survey
Updater 1992-09-01 Long, Keith R. U.S. Geological Survey
Editor 2012-11-01 Wilson, Anna B U.S. Geological Survey merged and deleted duplicate recore 10251225
Reporter 1983-11-18 Garner U.S. Bureau of Mines MS 0480430038 = 10251225

Beyond USGS

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

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