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  3. Mineral Resource Data System (MRDS)

Cristales Grandes

Occurrence in Chile with commodities Iron, Phosphorus-Phosphates
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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. Host and associated rocks
  8. Nearby scientific data
  9. Economic information about the deposit and operations
  10. Mining district
  11. Reserves and resources
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10058029
MRDS ID TC03753
Record type Site
Current site name Cristales Grandes
Alternate or previous names Laco 1 A 96

Geographic coordinates

Geographic coordinates: -67.50114, -23.79918 (WGS84)
Elevation 5150

Site location context

Political divisions (FIPS codes)

Chile(country)

South America(continent)

Land(continent)

Geographic areas

Country
Chile

Comments on the location information

  • ON NORTH FLANK OF ANDESITIC-RHYODACITIC VOLCANO.

Commodities

Commodity Importance
Iron Primary
Phosphorus-Phosphates Secondary

Materials information

Materials Type of material
Apatite Ore
Hematite Ore
Limonite Ore
Magnetite Ore
Calcite Gangue
Pyroxene Gangue
Quartz Gangue

Analytical data

Result 60-68% FE
Result TRACE ELEMENT DATA GIVEN BY NYSTROM AND HENRIQUEZ (1994).

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock
    Rock unit name Complejo El Laco
    Rock description Complejo El Laco
    Stratigraphic age (youngest) Pliocene
    Stratigraphic age (youngest) Pliocene
    Stratigraphic age (youngest) Pliocene
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock

Nearby scientific data

(1) -67.50114, -23.79918
ListMap

Economic information

Comments on the geologic information

  • GENERAL SUCESSION FROM BOTTOM TO TOP IS ANDESITIC LAVA (UP TO 30 M THICK), PYROCLASTIC ORE (UP TO 30 M THICK), MAGNETITE LAVA (UP TO 50 M THICK), PYROCLASTIC UNIT WITH FRAGMENTS OF MASSIVE ORE (ABOUT 20 M THICK), AND ANDESITIC FLOW. ORE BODIES ARE SURROUNDED BY NARROW METASOMATIC AUREOLES (UP TO 1 M THICK IN LAVA BUT WIDER IN TUFFS) WHERE HOST ROCK IS TRANSFORMED TO PYROXENE, SCAPOLITE, QUARTZ AND GARNET.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Both
Significant No
Discovery year 1958

Mining district

District name El Laco

Reserves and resources

  • Type In-situ
    Estimate year 1965
    Total resources 20000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Iron Fe 60 wt-pct Iron Major 1965

Reference information

Bibliographic references

  • Deposit

    BORIC, R., DIAZ, F., AND MAKSAEV, V., 1984, COMPLEMENTO MAPA METALOGENICO, II REGION: GERENCIA DE DESAROLLO, SANTIAGO, (12 VOLS.).

  • Deposit

    HENRIQUEZ, F., 1981, EL YACIMIENTO EL LACO (ABS): PRIMERO COLOQUIO SOBRE VOLCANISMO Y METALOGENESIS, UNIVERSIDAD DEL NORTE, ANTOFAGASTA, P. 92-94.

  • Deposit

    FRUTOS, J. AND PINCHEIRA, M., 1986, FICHAS METALOGENICAS DE YACIMIENTOS MINERALES METALICOS CHILENOS, IN FRUTOS, J., OYARZUN, J., AND PINCHEIRA, M., EDS., GEOLOGIA Y RECURSOS MINERALES CHILENOS: UNIVERSIDAD DE CONCEPCION, CONCEPCION, P. 841-888.

  • Deposit

    HENRIQUEZ, F. AND MARTIN, R., 1978, CRYSTAL GROWTH IN MAGNETITE FLOWS AND FEEDER DIKES, EL LACO, CHILE: CAN. MIN., 16, P. 581-589.

  • Deposit

    WEGNER, R., 1979, DIE MAGNETIT LAVASTROME VON EL LACO IN CHILE, UNDIHERE BEGLEISTENDEN GESTEINE: MEMORIA MINERLOGISTA, UNIV. ALBERT LUDWIG, FREIBERG, BREMEN, 89 P.

  • Deposit

    RUIZ, C. Y PEEBLES, F., 1988, YACIMIENTOS METALIFEROS DE CHILE: SANTIAGO, 334 P.

  • Deposit

    NYSTROM, J.O., AND HENRIQUEZ, F., 1994, MAGMATIC FEATURES OF IRON ORES OF THE KIRUNA TYPE IN CHILE AND SWEDEN: ORE TEXTURES AND MAGNETITE GEOCHEMISTRY: ECONOMIC GEOLOGY, V. 89, P. 820-839.

  • Deposit

    RUIZ FULLER, CARLOS, 1965, GEOLOGY AND METAL DEPOSITS OF CHILE, INSTITUTE OF GEOL. INV. CHILE, 307 P. (SPANISH) (430) R858G.

  • Deposit

    ROGERS, DAVID P., 1968, THE EXTRUSIVE IRON OXIDE DEPOSITS "EL LACO, CHILE" ECON. GEOL. V 63 N. 6 P. 700 (ABSTRACT).

  • Reserve-Resource

    RUIZ FULLER, 1965.

General comments

Subject category Comment text
Deposit DIKES WITHIN 700M X 300M AREA. >20,000,000MT OF >60% FE

Reporter information

Type Date Name Affiliation Comment
Reporter 01-FEB-1973 Shaffer, Glenn L. U.S. Geological Survey
Updater 01-JUN-1990 Page, Norman J. U.S. Geological Survey
Updater 01-SEP-1994 Klemic, Harry University of Arizona

Beyond USGS

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

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