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  3. Mineral Resource Data System (MRDS)

Cienega District

Producer in Guerrero, Mexico 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. Production statistics
  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 10050121
MRDS ID MX11007
Record type Site
Current site name Cienega District
Alternate or previous names El Diamante, San Jose, La Estrella, San Luis, Margarita, Porvenir, Dicha, Fenix, Rubi

Geographic coordinates

Geographic coordinates: -100.25034, 17.61738 (WGS84)
Elevation 1524
Relative position 40 - 50 KM SW OF TETELA DEL RIO

Site location context

Political divisions (FIPS codes)

Pima(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

Geographic areas

Country State
Mexico Guerrero

Comments on the location information

  • IT IS REACHED FROM BALSAS, GRO., THE TERMINAL OF THE RAILROAD, BY GOING DOWN THE BALSAS RIVER, A 5 OR 6 HOUR TRIP, TO TETELA DEL RIO BY BOAT AND THEN A DAY AND A HALF TRIP BY HORSE TO OTITLAN. ANOTHER ROUTE IS BY CAR FROM IGUALA, GRO., TO TEMISCO, GRO., A 7 HOUR TRIP AND THEN TWO DAYS BY HORSE TO OTITLAN. (1940'S)

Commodities

Commodity Importance
Mercury Primary

Materials information

Materials Type of material
Cinnabar Ore
Metacinnabar Ore
Calcite Gangue
Marcasite Gangue
Pyrite Gangue
Quartz Gangue

Alteration

  • (Local) Strong Kaolinitization, Slight Silicification, Limonitization

Analytical data

Result ASSAYS: EL DIAMANTE - 6 SAMPLES - RANGE 0 - 0.34% HG, AVERAGE - 0.06% HG. MARGARITA - 4 SAMPLES - RANGE 0 - 0.03% HG, AVERAGE - < 0.01%. SAN JOSE - 3 SAMPLES - TRACE. RUBI - 3 SAMPLES - TRACE - 0.12% HG, AVERAGE - 0.06% HG. PORVENIR - 1 SAMPLE - 0.03% HG. SAN LUIS - 1 SAMPLE - 0. ESTRELLA - 1 SAMPLE - 0.7% HG. DICHA - 1 SAMPLE - 0.18%. FENIX - 1 SAMPLE - 0.07% HG.

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Metavolcanic Rock > Mafic Metamorphic Rock > Greenstone
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Shale
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Siltstone
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Sandstone
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Conglomerate

Nearby scientific data

(1) -100.25034, 17.61738
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Isoclinal Folds, Fault Joints

Ore body information

  • General form STRINGERS AND POCKETS
    Strike N TO NW
    Dip W

Controls for ore emplacement

  • Follows Local Joints And Faults Rather Than District Wide

Comments on the geologic information

  • GRANITE STOCK 3 KM DOWN VALLEY. ORE OCCURS IN VEINS OF FINE GRAINED PYRITE, OR AS PAINT

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Cienega District

Production statistics

  • Year 1942
    Material HG
    Accuracy Estimate
    Description Ap_Grade: ^Low Grade, Good Samples Reached 0.34 % Hg
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Mercury Mercury 0wt-pct

Workings at the site

  • Type of workings Surface/Underground
    Overall depth 12M

Comments on the workings information

  • MINING OPERATIONS CONSISTED OF OPEN CUTS, TRENCHES, SHAFTS AND ADITS. MAPS OF OPERATIONS ARE AVAILABLE (MCALLISTER).

Reference information

Bibliographic references

  • Deposit

    MCALLISTER, J.F., AND GARCIA, L.B., CIENEGA QUICKSILVER DISTRICT, GUERRERO, MEXICO: U.S. GEOLOGICAL SURVEY REPORT.

  • Deposit

    RIGBY, J.H., 1942, REPORT ON RECONNAISSANCE TRIP TO DISTRICT WEST OF IGUALA IN STATE OF GUERRERO: UNPUBLISHED.

  • Production

    MCALLISTER, 1942.

General comments

Subject category Comment text
Deposit ACCESS DIFFICULT! IN 1942, MULE TRAILS FROM BALSAS OR HUAULTA PROVIDED ONLY ACCESS. LA ESTRELLA WAS THE BEST ZONE AS OF 1942, AND PROBABLY LIES ALONG THE MOST EXTENSIVE FAULT. SAN LUIS, AT A HIGHER LEVEL NEAR SAME FAULT, WAS UNPRODUCTIVE. AT MARGARITA ORE ALONG A LANDSLIDE CONTACT BETWEEN SHALE AND CONGLOMERATE CONTAINED STRINGERS OF COARSELY CRYSTALLINE CINNABAR AND PYRITE. ; INFO.SRC : 2 UNPUB REPT

Reporter information

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

Beyond USGS

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

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