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Las Chispas

Past Producer in Sonora, Mexico with commodities Silver, Gold, Zinc, Lead, Copper
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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. Reserves and resources
  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 10048969
MRDS ID MX00158
Record type Site
Current site name Las Chispas
Alternate or previous names William Tell
Related records 10229995

Geographic coordinates

Geographic coordinates: -110.17148, 30.21685 (WGS84)
Relative position 80KM SOUTH OF CANANEA, 25 KM SE OF SANTA ROSALLIA AND KLONDIKE.

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

Commodities

Commodity Importance
Silver Primary
Gold Secondary
Zinc Critical Secondary
Lead Secondary
Copper Secondary

Materials information

Materials Type of material
Argentite Ore
Cerargyrite Ore
Chalcopyrite Ore
Galena Ore
Gold Ore
Polybasite Ore
Proustite Ore
Pyrargyrite Ore
Silver Ore
Stephanite Ore
Calcite Gangue
Hematite Gangue
Quartz Gangue
Pyrite Unknown

Alteration

  • (Local) Potassic, Silicic

Analytical data

Result SHIPPING CONC.: 350 OZ/TON AG, 2.75 OZ/TON AU, 1.4% ZN, 0.7% PB, 0.2% CU, 4.5% FE, 1% CAO, (MONTIJO, 1920)
Result AVE: 6-7 OZ AG/TON, BONANZAS UP TO 1500-2000 OZ/TON, (DUFOURQ, 1910).

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite
    Stratigraphic age (youngest) Miocene
    Stratigraphic age (youngest) Miocene
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Pyroclastic Rock > Tuff
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite
    Rock unit name La Mesa
    Rock description La Mesa

Nearby scientific data

(1) -110.17148, 30.21685
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Nw-Trending Vertical Fault With E Side Upthrown 18-20 Ft; Ne-Trending Cross-Faults.

Ore body information

  • Strike N 10 W
    Dip 70-82 E

Controls for ore emplacement

  • Fault Controlled.

Comments on the geologic information

  • ORE FOUND IN BRECCIATED SECTIONS OF VEIN WHERE CUT BY CROSS-FAULTS.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Arizpe

Comments on the production information

  • MILLED ORE.

Reserves and resources

  • Type In-situ
    Estimate year 1985
    Total resources 18000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Silver Ag 180 g/mt Silver Major 1985

Workings at the site

  • Type of workings Underground
    Length 914.4M
    Overall depth 243.84M

Reference information

Bibliographic references

  • Deposit

    PANCZNER, WILLIAM D., 1987, MINERALS OF MEXICO: VAN NOSTRAND REINHOLD COMPANY, NEW YORK, 459 P.

  • 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

    ROLDAN-QUINTANA, J., 1979, BRIEF SUMMARY OF THE MINERAL DEPOSITS IN THE NORTHERN PART OF THE STATE OF SONORA, MEXICO IN ANDERSON, T.H., AND ROLDAN-QUINTANA, J., (EDS.), 1979, GUIDEBOOK, FIELD TRIP 27; GEOLOGY OF NORTHERN SONORA: U.N.A.M.- UNIV. PITTSBURG, P. 72.

  • Deposit

    MONTIJO, F., JR., 1920, THE LAS CHISPAS MINE IN SONORA, MEXICO: MINING AND SCIENTIFIC PRESS, V. 121, P. 58-60.

  • Deposit

    DUFOURQ, E.L., 1910, MINAS PEDRAZZINI OPERATIONS NEAR ARIZPE, SONORA, MEXICO: ENGINEERING AND MINING JOURNAL, V. 90, P. 1105-1106.

  • Production

    DUFOURQ, 1910.

General comments

Subject category Comment text
Deposit NATIVE AG, AGCL, AND AGS IN UPPER BRECCIATED TUFF, (ABOVE 200 FT). AG SULFOSALTS IN LOWER FELSITES. LODE AND PLACER GOLD.
Deposit SILVER CONTENT OF ORE: FIRST CLASS; 20% OF TOTAL, 360 OZ/TON. SECOND CLASS; 35% OF TOTAL, 55 OZ/TON. WASTE: 45% OF TOTAL, LESS THAN 3 OZ/TON. AU CONTENT EQUAL TO ABOUT 0.75% OF SILVER CONTENT. ; INFO.SRC : 1 PUB

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-1987 Staude, John-Mark G. (Page, Norman J.) U.S. Geological Survey
Updater 01-JUN-1988 Leonard, Kenneth R. U.S. Geological Survey

Beyond USGS

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

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