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Torreoncillos

Prospect in Chihuahua, Mexico with commodities Mercury, Lead, Gold, Silver, Copper, Antimony
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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. Ownership information
  15. Links to other databases
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10097322
MRDS ID MX02887
Record type Site
Current site name Torreoncillos
Alternate or previous names Mercurio, Neptuno, Dos Estrellas, Urano, Minerva

Geographic coordinates

Geographic coordinates: -105.83385, 27.16697 (WGS84)
Elevation 2000
Relative position 22 MI NW OF PARRAL BY DIRT ROAD. WITHIN 10 KM OF VIRGINIA SB MINE AND THE CERRO SAN PEDRO AG-PB SKARN.

Site location context

Political divisions (FIPS codes)

Pima(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

Geographic areas

Country State
Mexico Chihuahua

Comments on the location information

  • CLAIMS ARE ALONG CREST OF CORDON DE LA MATANZA

Commodities

Commodity Importance
Mercury Primary
Lead Primary
Gold Tertiary
Silver Tertiary
Copper Tertiary
Antimony Critical Tertiary

Comments on the commodity information

  • UNECONOMIC QUANTITIES OF CU, AU AND AG OCCUR IN THE MERCURY VEIN.

Materials information

Materials Type of material
Cerussite Ore
Chrysocolla Ore
Cinnabar Ore
Galena Ore
Malachite Ore
Barite Gangue
Pyrite Gangue
Smithsonite Gangue

Alteration

  • (Local) Oxidation And Supergene At Least 75 M Downward

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Pliocene
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Shale
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Sandstone

Nearby scientific data

(1) -105.83385, 27.16697
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Small Faults And Wrinkle Folds

Ore body information

  • Strike NS
    Dip STEEPLY E AT SURFACE, W AT DEPTH
    Length 300M
    Width 5M
    Depth to top 0M

Controls for ore emplacement

  • Veins Seem To Occur Along Earlier Ns Trending

Comments on the geologic information

  • BEDDING IS ROUGHLY FLAT LYING, WITH SMALL WRINKLE-LIKE FOLDS A FEW M ACROSS AND SMALL FAULTS. SMALL GRANODIORITE INTRUSIVES INTO CRETACEOUS SEDIMENTS AND ETERT VOLCANICS.

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic
Deposit size Small
Significant No
Year of first production 1943

Ownership information

  • Type Owner
    Owner Sres. Rodriguez And Dominguez

Comments on the reserve resource information

  • MINIMUM, 25,000 TONS EXPECTED.

Comments on the workings information

  • 7 VEINS, TOTALLING 1500 M IN LENGTH, WERE ORIGINALLY DENOUNCED FOR LEAD. THREE WELL DEFINED ORE SHOOTS OF MERCURY, AVERAGING 0.5% MERCURY OVER WIDTHS OF 0.6 TO 0.9 M AND EXPOSED FOR 60 M WERE DISCOVERED IN 1941. SUBSURFACE SAMPLING OF THE MAIN VEIN SHOWED 2 KG/T OVER A WIDTH OF ABOUT 1.3 M, UNIFORMLY DISTRIBUTED THROUGHOUT THE WIDTH. MERCURIO CLAIM - 20 M TUNNEL, 2.5 M WINZE. URANIO CLAIM - CROSSCUT TUNNEL. ALSO VARIOUS SHAFTS ALONG OUTCROP VEIN.

Reference information

Bibliographic references

  • Deposit

    GALLAGHER, D., 1943, MEMORANDUM FOR MR. HEWITT, USGS OF FILE WITH J. RYTUBA.

  • Deposit

    GALLAGHER, D., (1940'S), REPORT ON MERCURY MINES OF SRES. RODRIGUEZ & DOMINGUEZ: UNPUBLISHED REPORT.

  • Reserve-Resource

    GALLAGHER, D., 1940'S.

General comments

Subject category Comment text
Deposit NORTH SOUTH TRENDING ZONE AT CREST. INTERNALLY, VEINS VARY IN MINERAL CONSTITUTION. URANO - VEIN STRIKES N 10 E AND DIPS 75 E. RODRIGUEZ TUNNEL - VEIN STRIKES N 10 E, DIPS 45 E. THE SPUR VEIN STRIKES N 10 W, DIPS 35 E, PINCHES AT SURFACE AND SOUTH.
Deposit EXPLOITATION OF LARGE TONNAGE/MARGINAL GRADE HG ORE WAS JUST BEGINNING IN 1943. IT WAS DOUBTFUL WHETHER ANY SIGNIFICANT QUANTITY OF MERCURY WOULD EVER BE PRODUCED. ; INFO.SRC : 2 UNPUB REPT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-NOV-1978 Slagle, Letha P. (Rytuba, J.) U.S. Geological Survey
Updater 01-SEP-1991 Bolm, Karen S. (Staude, John-Mark G.) U.S. Geological Survey

Beyond USGS

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

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