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Las Penitas

Producer in Sonora, Mexico with commodity Graphite
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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. Mineral occurrence model information
  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. Ownership information
  16. Workings at the site
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10049173
MRDS ID MX00422
Record type Site
Current site name Las Penitas
Related records 10279545

Geographic coordinates

Geographic coordinates: -110.18953, 28.54329 (WGS84)
Elevation 305
Location accuracy 2000(meters)
Relative position 10 KM EAST OF MORADILLAS GRAPHITE MINE

Site location context

Political divisions (FIPS codes)

Pima(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

Geographic areas

Country State
Mexico Sonora

Comments on the location information

  • ESTIMATE TO WITHIN 1 KM.; 75 KM SOUTHEAST OF HERMOSILLO, 15 KM SOUTH OF THE HERMOSILLO TO TECOMPA ROAD.

Commodities

Commodity Importance
Graphite Critical Primary

Comments on the commodity information

  • GRAPHITE FAIRLY CONSTANT GRADE AND SIZE.

Materials information

Materials Type of material
Graphite Ore

Analytical data

Result ORE IS 80% GRAPHITE.

Mineral occurrence model information

Model code 69
USGS model code 18k
Deposit model name Amorphous graphite

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Sandstone
    Stratigraphic age (youngest) Late Jurassic

Nearby scientific data

(1) -110.18953, 28.54329
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Very Little Faulting In Mine, Orebody Only Displaced A Few Inches To A Foot.

Ore body information

  • General form IRREGULAR
    Strike SHALLOW DIPPING, UNDULATING
    Dip SHALLOW
    Thickness 1.83M
    Depth to top 12.19M
    Depth to bottom 45.72M
  • General form IRREGULAR
    Dip SHALLOW

Controls for ore emplacement

  • Mantos, Stratabound

Comments on the geologic information

  • COUNTRY ROCK (INDICATED BY MAP SYMBOL AND LEGEND): TRIASSIC-JURASSIC QUARTZITES AND CARBONACEOUS SHALES. FOR INFORMATION ON BARRANCA FORMATION CONTACT GLORIA MANCASTER AT UNIVERSIDAD NACIONAL AUTONAMA DE MEXICO.

Economic information about the deposit and operations

Development status Producer
Commodity type Non-metallic
Deposit size Medium
Significant No
Production years 1989-PRESENT

Mining district

District name Eastern Sonora Graphite District / Moradillas

Ownership information

  • Type Owner-Operator
    Owner Compania Minera Lombardia, Hermosillo, Sonora

Comments on the production information

  • PRODUCTION DATA IS ONLY FROM CONVERSATIONS.

Comments on the reserve resource information

  • BARRANCA FORMATION HOSTS MANY METAMORPHOSED COAL NOW GRAPHITE SEAMS, UP TO 6 MANTOS ARE FOUND IN PLACES.
  • RESERVES ARE OVER 12,000 TONS ACCORDING TO FORMENTO MINERA IN HERMOSILLO, SONORA.

Workings at the site

  • Type of workings Underground
    Length 76.2M
    Overall depth 36.58M
    Overall length 76.2M
    Overall width 36.58M

Comments on the workings information

  • UNDERGROUND MINING FOLLOWS 1.2 - 2.0 METERS THICK MANTOS OF 80% GRAPHITE. NEARLY ALL GRAPHITE MINES IN THE AREA, OF WHICH THERE ARE MANY, ARE UNDERGROUND WORKINGS.

Comments on development

  • PRIMARILY FROM UNDERGROUND MINING, LITTLE OR NO DRILLING. ; TOTAL$: 1 ; ECON.COM: CAPITAL INVESTMENT PRINCIPLY IN INSTALLING A SCREEN SORTER AND A SMALL 15 MINER OPERATION USING TYPICAL UNDERGROUND METHODS.

Reference information

Bibliographic references

  • Deposit

    PEREZ SEGURA, EFREN, 1985, CARTA METALOGENETICA DE SONORA 1:250000 UNA INTERPRETACION DE LA METALOGENIA DE SONORA: UNIV. OF SONORA, DEPT. OF GEOL., HERMOSILLO, MEXICO, 66 P.

  • Deposit

    SUTPIN, DAVID M., AND BLISS, JAMES D., 1990, DISSEMINATED FLAKE GRAPHITE AND AMORPHOUS GRAPHITE DEPOSIT TYPES: AN ANALYSIS USING GRADE AND TONNAGE MODELS: CIM BULLETIN, VOL. 83, NO. 940, P. 85-89.

  • Other Database

    CIMRI

  • Production

    COMMUNICATION FROM FORMENTO MINERA

General comments

Subject category Comment text
Deposit STRATABOUND GRAPHITE DEPOSIT IN METAMORPHOSED BARRANCA GROUP SEDIMENTS. GRAPHITE FORMED FROM CONTACT METAMORPHISM OF COAL BEDS BY DIKES AND SILLS. ; INFO.SRC : 1 PUB

Reporter information

Type Date Name Affiliation Comment
Reporter 01-DEC-1987 Leonard, Kenneth R. (Page, Norman J.) U.S. Geological Survey
Updater 01-DEC-1990 Staude, John-Mark G. U.S. Geological Survey

Beyond USGS

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

Maps centered on this site