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El Romeral

Past Producer in Chile with commodities Iron, Silica, Ferrosilicon, Phosphorus-Phosphates, Sulfur
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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. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Ore body information
  13. Controls for ore emplacement
  14. Economic information about the deposit and operations
  15. Mining district
  16. Ownership information
  17. Reserves and resources
  18. Links to other databases
  19. Bibliographic references
  20. General comments
  21. Reporter information

Geologic information

Identification information

Deposit ID 10106138
MRDS ID W029812
Record type Site
Current site name El Romeral
Related records 10134334

Geographic coordinates

Geographic coordinates: -71.24788, -29.7108 (WGS84)
Elevation 400
Relative position 25 KM N FROM LA SERENA

Site location context

Political divisions (FIPS codes)

Chile(country)

South America(continent)

Land(continent)

Geographic areas

Country
Chile

Commodities

Commodity Importance
Iron Primary
Silica, Ferrosilicon Secondary
Phosphorus-Phosphates Secondary
Sulfur Tertiary

Materials information

Materials Type of material
Hematite Ore
Magnetite Ore
Martite Ore
Actinolite Gangue
Apatite Gangue
Calcite Gangue
Clinozoisite Gangue
Diopside Gangue
Pyrite Gangue
Scapolite Gangue
Tourmaline Gangue

Alteration

  • (Local) Propylitic

Analytical data

Result 58 % FE (AVERAGE), 4 % SIO2, 0.002 % P, 0.02 % S
Result MINERALIZATION BETWEEN 475 AND 550 DEGREES C.

Mineral occurrence model information

Model code 158
USGS model code 25i
Deposit model name Volcanic-hosted magnetite

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Stratigraphic age (youngest) Paleocene
    Stratigraphic age (youngest) Early Cretaceous
  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
  • Host or associated Host
    Rock type Metamorphic Rock > Hornfels
  • Host or associated Host
    Rock type Metamorphic Rock > Skarn (Tactite)
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic)
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite

Nearby scientific data

(1) -71.24788, -29.7108
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Dioritic Batholite; Southern Termination Of Atacama Fault System
Type of structure Local
Structure description Post-Mineral Dextral Movement On Fault To Northeast

Ore body information

  • General form LENTICULAR
    Strike N-S
    Dip 90
    Thickness 250M
    Length 850M
    Width 400M

Controls for ore emplacement

  • Fault - Proximal To Sinistral Romeral Fault. Mineralization Pattern Suggests That Ore Deposition Commenced Near Romeral Fault And Shifted Eastward And Upward Until Waning Stages When It Retreated To Central And Lower Portions Of Deposit.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Both
Deposit size Small
Significant No
Year of first production 1955

Mining district

District name Romeral

Ownership information

  • Type Owner
    Owner Compania De Acero Del Pacifico (Cap)

Comments on the production information

  • D1)-D4) ORE QUALITIES: BLAST FURNACE ORE, RUN-OF-MINE, FINES, OPEN HEARTH ORE. QUANTITIES: SHIPED ORE. NORTH ORE BODY MINED OUT BY 1970.

Reserves and resources

  • Type In-situ
    Estimate year 1970
    Total resources 80000000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Iron Fe 60 wt-pct Iron Major 1970
  • Type In-situ
    Estimate year 1980
    Total resources 453000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Iron Fe 73.5 wt-pct Iron Major 1980
  • Type In-situ
    Estimate year 1968
    Total resources 2000000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Iron Fe 63 wt-pct Iron Major 1968
    Silica, Ferrosilicon SiO2 5 wt-pct Silica Minor 1968
    Phosphorus-Phosphates P 0.25 wt-pct Phosphorus Minor 1968
    Sulfur S 0.12 wt-pct Sulfur Trace 1968
  • Type In-situ
    Estimate year 1970
    Total resources 4000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Iron Fe 60 wt-pct Iron Major 1970
    Silica, Ferrosilicon SiO2 4 wt-pct Silica Minor 1970
    Phosphorus-Phosphates P 0.02 wt-pct Phosphorus Minor 1970
    Sulfur S 0.02 wt-pct Sulfur Trace 1970
  • Type In-situ
    Estimate year 1970
    Total resources 4000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Iron Fe 60 wt-pct Iron Major 1970

Comments on the workings information

  • CAPACITY:12,192 MET TPD. ORE TONNAGE: 4,134,322 MET TPY

Comments on development

  • 1959-1960 - MAGNETOMETER SURVEYS AND DRILLING

Reference information

Comments on the other database information

  • RECORD NUMBER ISM0769 IS A POTENTIAL DUPLICATE OF THIS RECORD

Bibliographic references

  • Deposit

    RUIZ FULLER, C., 1965, GEOLOGIA Y YACIMIENTOS METALIFEROS DE CHILE, EDITORIAL UNIVERSITARIA 1965

  • Deposit

    ALVARADO, BENJAMIN, 1970, IRON ORE DEPOSITS OF SOUTHAMERICA, IN SURVEY OF WORLD IRON ORE RESOURCES -- OCCURRENCE AND APPRAISAL: NEW YORK, UNITED NATIONS, P. 302-380

  • Deposit

    SKILLINGS' MINING REVIEW, MARCH, 1976.

  • Deposit

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

  • Deposit

    BOOKSTROM, A.A., 1977, THE MAGNETITE DEPOSITS OF EL ROMERAL, CHILE: ECON GEOL. 72, 1101-1130.

  • Other Database

    CIMRI

  • Production

    THE ANNUAL PRODUCTION FIGURES ARE FROM SKILLINGS' MINING REVIEW, 1976.

General comments

Subject category Comment text
Deposit TWO PRINCIPAL ORE BODIES: 1) MAIN - STEEPLY-DIPPING LENS IN BETWEEN TWO LOBES OF THE ROMERAL DIORITE: 850 M X 250 M: 20-70% FE. HIGHEST GRADES ALONG STEEPLY-DIPPING ZONES TRENDING 0, N30-50E, AND N20-45W: 2) NORTH - CONFORMABLE MAGNETITE-RICH PODS IN STEEPLY-DIPPING ACTINOLITIZED SCHIST: 300 M X 100 M X 50 M, BOTH TREND NORTHERLY, PARALLEL TO N-TRENDING, ANASTOMOSING STRIKE-SLIP FAULTS AND THE EASTERN CONTACT OF THE WESTERN LOBE OF THE DIORITE. THE SOUTH EXTENSION ORE BODY, 500 M SOUTH OF THE MAIN ORE BODY, IS 800M X 100M, DIPS STEEPLY, AND THE TOP IS 175 M BELOW SURFACE. DURNING ORE DEPOSITION, FOUR GENERATIONS OF DIORITE APLITE DIKES WERE EMPLACED INTO GASH FRACTURES FORMED BY MOVEMENT ALONG SINISTRAL ROMERAL FAULT.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-1978 Theune, C.T. U.S. Geological Survey
Updater 01-SEP-1990 Williams, William C. University of Arizona

Beyond USGS

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

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