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El Pachon

Occurrence in San Juan, Argentina with commodities Copper, Molybdenum
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Alteration
  7. Host and associated rocks
  8. Nearby scientific data
  9. Geologic structures
  10. Ore body information
  11. Controls for ore emplacement
  12. Economic information about the deposit and operations
  13. Mining district
  14. Land status
  15. Ownership information
  16. Reserves and resources
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10004174
MRDS ID AR00317
Record type Site
Current site name El Pachon
Alternate or previous names Propiedades Mineras De Pachon: Pachon 24 Has, Moly 9 Has, Cuerno 9 Has, Pachon 6 9 Has, Pachon 18 9 Has, Vega Azul 21 Has, Maca 9 Has, Calvario 9 Has, Chabela 9 Has, Gaviota 9 Has, Piuquen 9 Has, Pachon 19 9 Has, Agua Buena 9 Has, Pachon 20 9 Has, Pachon 21 9 Has, Pachon 22 9 Has

Geographic coordinates

Geographic coordinates: -70.4509, -31.75302 (WGS84)
Elevation 3700
Relative position BARREAL 175 KM AL ESTE

Site location context

Political divisions (FIPS codes)

San Juan(province)

Argentina(country)

South America(continent)

Land(continent)

Geographic areas

Country State
Argentina San Juan

Comments on the location information

  • ACCESO REGULAR POR HUELLA MINERA, AGUA EN LAGO PACHON (1.000.000 M3) DISTANTE A 4 KM, RELIEVE ABRUPTO, ALTA MONTANA (TEMP. MIN EN INVIERNO -25C). MANO DE OBRA DISPONIBLE EN BARREAL, CALINGASTA, USPALLATA.

Commodities

Commodity Importance
Copper Primary
Molybdenum Primary

Comments on the commodity information

  • PARAGENESIS: CUARZO, PIRITA, CALCOPIRITA, MOLIBDENITA, TENACITA, CUPRITA, CALCOSINA, COVELINA, OXIDOS DE HIERRO.

Alteration

  • (Local) Silicificacion, Sericitizacion En El Nucleo Central, Argilitizacion En La Capa Intermedia Y En La Zona Externa Cloritizacion Y Propilitizacion

Analytical data

Result CU 0.59% - MO 0.015%

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Tonalite
    Stratigraphic age (youngest) Pliocene
    Stratigraphic age (youngest) Late Jurassic
  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
    Rock unit name Formation Choiyoi;Formation Pachon;Intrusivos Plutonicos
    Rock description Formation Choiyoi;Formation Pachon;Intrusivos Plutonicos
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Pyroclastic Rock > Volcanic Breccia (Agglomerate)
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite
    Rock unit name Grupos Cuyo Y Lotena
    Rock description Grupos Cuyo Y Lotena

Nearby scientific data

(1) -70.4509, -31.75302
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Bloques Submeridionales Basculados Al Oeste Y Limitados Al Este Por Fallas Inversas De Alto Angulo.
Type of structure Local
Structure description Suave Plegamiento De Las Capas Jurasicas

Ore body information

  • General form LOS SULFUROS SE PRESENTAN EN VENILLASACOMPANANDO AL CUARZO EN FRACTURAS Y MICROFRACTURAS, CONSTITUYENDO UN TIPICO STOCKWORK

Controls for ore emplacement

  • Estructural (Fracturas Y Microfracturas)

Comments on the geologic information

  • LA ALTERACION SE LOCALIZA EN AREAS RESTRIGIDAS DE LOS PLUTONES Y SUS BORDES, CON UNA MARCADA BIOTITIZACION EN LOS LUGARES DE INTRUSION DIORITICA FORMANDO UNA FAJA QUE MARGINA LOS CUERPOS.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Large
Significant No
Discovery year 1962
Discoverer Compania Minera Aguilar

Mining district

District name Pachon

Land status

Ownership category Private

Ownership information

  • Type Owner
    Owner Compania Minera Aguilar - Carlos Pellegrini 1069, Piso Duodecimo , Capital Federal.

Reserves and resources

  • Type In-situ
    Estimate year 1986
    Total resources 358000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.6 wt-pct Copper Major 1986

Comments on development

  • TOTAL$: 895 ; ECON.COM: ACTUALMENTE DEBERIA TRIPLICARSE EL VALOR DE LA MENA PARA SER ECONOMICO

Reference information

Bibliographic references

  • Deposit

    EVALUACION PREVIA (FONEM), 1986. CARPETA J0007-00. DIR. NAC. MIN. (INEDITO)

  • Reserve-Resource

    CARPETA EVALUACION PREVIA NO. J0007-00

General comments

Subject category Comment text
Deposit EL AREA MINERALIZADA CUBRE UNA SUPERFICIE DE 2.3 KM2

Reporter information

Type Date Name Affiliation Comment
Reporter 01-SEP-1986 Rojo, Carlos A. (Banos, E.) Direccion Nacional de Mineria, Argentina
Updater 01-AUG-1993 Diego Silva Nieto Direccion Nacional de Mineria, Argentina

Beyond USGS

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

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