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  3. Mineral Resource Data System (MRDS)

San Julian

Past Producer in Sonora, Mexico with commodity Tungsten
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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. Ore body information
  11. Economic information about the deposit and operations
  12. Mining district
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10049034
MRDS ID MX00244
Record type Site
Current site name San Julian
Alternate or previous names San Carlos, Puerto De Buenavista
Related records 10182819

Geographic coordinates

Geographic coordinates: -109.25061, 28.26692 (WGS84)
Relative position 1 KM N OF THE TOWN OF SANTA ANA AND ABOUT 10 KM S OF SAN NICOLAS.

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

Commodities

Commodity Importance
Tungsten Critical Primary

Comments on the commodity information

  • SCHEELITE CONTAINED V. LITTLE MOLYBDENUM, SO IT SOLD FOR A HIGHER PRICE THAN THE CONC. FROM NEARBY LA CRUZ MINE.

Materials information

Materials Type of material
Scheelite Ore

Mineral occurrence model information

Model code 45
USGS model code 15
Deposit model name W pegmatite

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Host
    Rock type Plutonic Rock > Pegmatite

Nearby scientific data

(1) -109.25061, 28.26692
ListMap

Economic information

Ore body information

  • Thickness 5M
    Length 30M

Economic information about the deposit and operations

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

Mining district

District name San Nicolas

Comments on the reserve resource information

  • RESERVE ESTIMATE DIFFICULT DUE TO NUMEROUS CAVED WORKINGS AND SURFACE COVER. PILLARS IN BLOCK BEING MINED IN MARCH 1943 CONTAINED ABOUT 500 TONS OF MINERALIZED ROCK. A SMALL AMOUNT OF DEVELOPMENT WORK MIGHT PROVE PRESENCE OF A FEW THOUSAND TONS OF MINERALIZED ROCK CONTAINING AN AVE. OF ABOUT 0.5 % WO3 WITHIN 10 M OF THE WORKINGS. DUMP MATERIAL AND PLACER GRAVELS ASSAYED LESS THAN 0.3 % WO3.

Comments on the workings information

  • IRREGULAR SHALLOW OPEN CUTS AND SMALL BURROWLIKE OPENINGS ALONG SEAMS OF HIGH-GRADE MATERIAL.

Comments on development

  • IN MARCH 1943, SIX MEN WERE MINING OUT THE HIGH GRADE POCKETS IN THE WORKINGS AND THIRTY OTHERS REWORKING THE DUMP MATERIAL AND PLACER GRAVEL IN THE ARROYO BELOW THE MINE WITH DRY WASHERS TO PRODUCE ABOUT 40 KG OF 50% WO3 CONC. PER DAY.

Reference information

Bibliographic references

  • Deposit

    WIESE, JOHN H., AND CARDENAS, SALVADOR, 1945, TUNGSTEN DEPOSITS OF THE SOUTHERN PART OF SONORA, MEXICO: USGS BULL 946, P. 103-130

  • Production

    WIESE AND CARDENAS, 1945.

General comments

Subject category Comment text
Deposit SCHEELITE OCCURS IN A ZONE OF STRINGERS AND PODS OF PEGMATITE IN GRANITE. MINERALIZED ZONE 30 M BY 5 M, ABOUT 50 M DOWNSLOPE OF GRANITE/QUARTZITE CONTACT. STRINGERS AVE. 10-20 CM ACROSS AND LESS THAN 1 M IN LENGTH. ENTIRE MINERALIZED ZONE DECOMPOSED BY WEATHERING. SCHEELITE PARTIALLY SEPARATED FROM THE ROCK BY SCREENING.

Reporter information

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