La Encantada District

Producer in Coahuila De Zaragoza, Mexico with commodities Silver, Lead
Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Alteration
  7. Nearby scientific data
  8. Geologic structures
  9. Controls for ore emplacement
  10. Economic information about the deposit and operations
  11. Mining district
  12. Ownership information
  13. Bibliographic references

Geologic information

Identification information

Deposit ID 60001112
MRDS ID MX02371
Record type District
Current site name La Encantada District
Related records 10205881

Geographic coordinates

Geographic coordinates: -102.25043, 28.50026 (WGS84)
Relative position 25 KM S OF LA CUESTA. 5 KM E OF LA CUESTA-CUARTOCIENEGAS HWY. THE DEPOSITS ARE AT THE SOUTHERN END OF THE SIERRA DE LA ENCANTADA, 120 KM N65W OF THE CITY OF MUSQUIZ, COAHUILA.

Site location context

Political divisions (FIPS codes)

Pima(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

Geographic areas

Country State
Mexico Coahuila De Zaragoza

Commodities

Commodity Importance
Silver Primary
Lead Primary

Alteration

  • (Local) MARMORIZATION

Nearby scientific data

(1) -102.25043, 28.50026

Economic information

Geologic structures

Type of structure Local
Structure description SURFACE EXPRESSION OF OREBODIES RANGES FROM NONE TO VERY LIMITED. OXIDIZED ZONES OR SCARCE "CALCITE BRECCIAS" OR OREBODIES. COMMONLY, THIN (LESS THAN 1 MM. TO A FEW CENTIMETERS) CALCITE-HEMATITE-MANGANESE OXIDE MICROVEINLETS COMPOSE THE STOCKWORKS OR ARE IRREGULARLY DISTRIBUTED ABOVE MINERALIZED ZONES.
Type of structure Regional
Structure description STRUCTURALLY, LA ENCANTADA LIES ON THE SOUTHWESTERN FLANK OF THE NW-SE-TRENDING SIERRA DE LA ENCANTADA ANTICLINORIUM. THE BEDS ON THE FLANKS OF THE SIERRA DE LA ENCANTADA DIP 30-40 DEGREES WITH LOCAL VERTICAL AND OVERTURNED STRATA. IN THE MINE AREA, THE BEDS DIP FROM 20-30 DEGREES W. BLOCK FAULTING CUTS THE ANTICLINE STRUCTURES OF SIERRA DE LA ENCANTADA. A REGIONAL N26W FAULT, TRACEABLE FOR 38 KM, CUTS THE ANTICLINORIUM SW OF THE MINE. THIS FAULT POSSIBLY REFLECTS REACTIVATION OF PALEOZOIC BASEMENT FAULTS DURING LARAMIDE TIME AND MAY HAVE CONTROLLED THE EMPLACEMENT OF THE GRANODIORITE BODY. A SIMILAR STRUCTURAL SETTING HAS BEEN INVOKED TO EXPLAIN THE LOCALIZATION OF SEVERAL MINERAL DEPOSITS ALONG THE CHIHUAHUA TROUGH. MOST OF THE FAULTS ARE NORMAL, AND THE MAIN SYSTEMS TREND N15-30W AND N50-80E. BOTH SYSTEMS POSTDATE FOLDING AND PREDATE MINERALIZATION ALTHOUGH THE EXACT RELATIONSHIP BETWEEN THEM IS UNCLEAR. NORTHEAST-TRENDING FRACTURES APPEAR TO BE OLDER THAN THE NW-TRENDING FAULTS. MULTIPLE PHASES OF FRACTURING ASSOCIATED WITH UPLIFT AND IGNEOUS INTRUSIONS ADD COMPLEXITY TO THE STRUCTURAL REGIME. WITH THE EXCEPTION OF THE REGIONAL LA ENCANTADA FAULT, THE N15-30W SYSTEM APPEARS TO BE SHALLOW AND PROBABLY INDICATES SEPARATE FAULTING AND FRACTURING PHASES WHICH WERE ACTIVE AFTER FOLDING AND CONTINUED AFTER INTRUSION AND MINERALIZATION. IN THE MINE AREA, TWO GRABENS BOUNDED BY THE ROMO-MARIA ISABEL AND SAN JUAN-SAN JOSE FAULTS CONTAIN THE CENTRAL OREBODIES (LA PRIETA-LA ESCONDIDA).

Controls for ore emplacement

  • Fault/fracture

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Discovery year 1950
Discoverer Local Prospectors
Year of first production 1967

Mining district

District name LA ENCANTADA DISTRICT

Ownership information

  • Type Owner
    Owner LA ENCANTADA MINING COMPANY
    Year 1986
  • Type Operator
    Owner LA ENCANTADA MINING COMPANY
    Year 1986

Reference information

Bibliographic references

Beyond USGS

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