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La India

Past Producer in Leon, Nicaragua with commodities Gold, Silver, Copper, Lead, Zinc, Cobalt
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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. Host and associated rocks
  9. Nearby scientific data
  10. Geologic structures
  11. Ore body information
  12. Economic information about the deposit and operations
  13. Mining district
  14. Ownership information
  15. Reserves and resources
  16. Workings at the site
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10086129
MRDS ID W702055
Record type Site
Current site name La India
Alternate or previous names La India Mine, La India Vein, Other Veins Include: America, Guapinol, San Juan, Espinito, Buenos Aires, La Virgin, Chorro 1, Chorro 2, Pesadero, San Lucas, Dos Hermanos, Pilar, Jicote, Amallo, Cristalitos, Choporro, Tereza, Constancia

Geographic coordinates

Geographic coordinates: -86.29998, 12.75095 (WGS84)
Elevation 475
Location accuracy 500(meters)
Relative position 50 MILES N OF MANAGUA, TOWN OF LA CRUZ DE LA INDIA (LAT/LONG GIVEN ABOVE), 65 KM N OF MANAGUA, Acc +/- 10 Sec, Acc +/- 10 Sec, Acc +/- 10 Sec, Acc +/- 10 Sec

Site location context

Political divisions (FIPS codes)

Leon(province)

Nicaragua(country)

North America(continent)

Land(continent)

Geographic areas

Country State
Nicaragua Leon

Comments on the location information

  • THE MINING DISTRICT EXTENDS MOSTLY NW FOR ABOUT 5 KM

Commodities

Commodity Importance
Gold Primary
Silver Secondary
Copper Tertiary
Lead Tertiary
Zinc Critical Tertiary
Cobalt Critical Tertiary

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Gold Ore
Hematite Ore
Pyrite Ore
Sphalerite Ore
Calcite Gangue
Quartz Gangue

Alteration

  • (Local) Silicification, Argilization, Propylization

Analytical data

Result UP TO 350 PPM CU, 10'S OF PPM ZN, 1-2 PPM CO
Result TEMPERATURE OF FORMATION 150-200 DEGREES C. AU/AG=1. AVERAGE AU CONTENT 7.8 G/T. AU IS FINE GRAINED, RARELY FORMS AGGREGATES UP TO 200 U.

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic)
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Mafic Volcanic Rock > Basalt
    Rock unit name Upper Coyol;Lower Coyol;Matagalpa Group
    Rock description Upper Coyol;Lower Coyol;Matagalpa Group

Nearby scientific data

(1) -86.29998, 12.75095
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Large Ne Strike Slip Faults Displaced
Type of structure Local
Structure description Local Nw-Se Normal Faults, Some Poorly Defined Folds, One With Ne Axis

Ore body information

  • Strike MAINLY NW, SOME NE
    Dip 50-80 NE, (55-70 SW)
    Thickness 500M
    Length 1700M
    Width 2.9M

Comments on the geologic information

  • OCCASIONAL TUFFACEOUS SANDSTONES, LIMESTONES, AND EVAPORATES (SEE SANTA ROSA DEL PERON) FOUND IN SEQUENCE UPPER MATAGALPA - LOWER COYOL. UPPER COYOL EXTENDS FROM 200-600 M. LOWER COYOL 300-500 M.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Significant No

Mining district

District name Matagalpa Area

Ownership information

  • Type Operator
    Owner Compania Mineria La India. Triton Mining
    First year 1994
  • Type Owner
    Owner Compania Mineria La India

Comments on the production information

  • TREAT 9,000 TONS OF ORE PER MONTH 1940'S. FIGURES GIVEN FOR 1940'S REFLECT ANNUAL PRODUCTION DURING THAT ERA. TOTAL PRODUCTION ABOUT 1,000,000 T.

Reserves and resources

  • Type In-situ
    Estimate year 1992
    Total resources 3300000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 9.6 g/mt Gold Major 1992
  • Type In-situ
    Estimate year 1992
    Total resources 500000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 8.9 g/mt Gold Major 1992
  • Type In-situ
    Estimate year 1993
    Total resources 354234000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 8.9 g/mt Gold Major 1993
  • Type In-situ
    Estimate year 1994
    Commodity Subtype Grade units Group Importance Year
    Gold Au 7.623 g/mt Gold Major 1994

Comments on the reserve resource information

  • ORE (1) IS POTENTIAL RESERVE, ORE (2) IS PROBABLE RESERVE QUOTED BY CORNAD.
  • ORE (1) PROBABLE AND POSSIBLE DRILL RESERVES. AU TOTAL INDICATED RESOURCE INCLUDES OTHER GOLD OCCURRENCES.

Workings at the site

  • Type of workings Underground
    Name of workings AMERICA
    Overall depth 300M
  • Type of workings Underground
    Name of workings CONSTANCIA
    Overall depth 175M
  • Type of workings Underground
    Name of workings ESPINITO
    Overall depth 100M
  • Type of workings Underground
    Name of workings LA INDIA
    Overall depth 200M

Comments on the workings information

  • MOSTLY MINED UNDERGROUND AND SOME SMALL PITS ON SURFACE (LA INDIA, AMERICA, CONSTANCIA) WORKED EXTENSIVELY BY NORANDA, SAN LUCAS, AND LOS CRISTALITOS TO A LESSER DEGREE.

Comments on development

  • ACQUIRED IN 1948 BY NORANDA, WORKED UNTIL 1956, ABANDONED IN FAVOR OF LIMON, IN PART DUE TO WATER PROBLEMS. ROSARIO MINING LTD DID PROSPECTING AND GEOCHEMICAL SAMPLING 1976-1978. ; MILL.CAP : 350 TONS/DAY

Reference information

Bibliographic references

  • Deposit

    INSTITUTO CENTROAMERICANO DE INVESTIGACION Y TECNOLOGIA INDUSTRIAL (ICAITI), 1970, MAPA METRALOGENETIO DE AMERICA CENTRAL; 1:2000000 & ESTUDIOS METALOGENETICOS DE AMERICA CENTRAL: PUBLICIONES GEOLOGICAS DEL ICAITI NUMERO III, 76 P.

  • Deposit

    ROBERTS, R.J., AND IRVING, E.M., 1957, MINERAL DEPOSITS OF CENTRAL AMERICA: U.S. GEOLOGICAL SURVEY BULLETIN 1034, P. 189.

  • Deposit

    SUNDBLAD, KRISTER, 1985, TRACE ELEMENT DISTRIBUTION IN THE NICARGUAN AURIGEROUS DEPOSITS - A RECONAISSANCE STUDY: MANAGUA, NICARAGUA, SGAB, 12 P.

  • Deposit

    LILLJEQUIST, ROBERT, AND HODGSON, GLEN, 1983, STRUCTURES AND ROCK FORMATIONS RELATED TO PRECIOUS METAL VEIN DEPOSITS IN NICARAGUA: MANAGUA, NICARAGUA, INMINE, 63 P.

  • Deposit

    KONKAKOV, L.A., NABROVENKOV, O.S., 1983, OCNOVNYYE CHERTY METALOGENII NIKARAGUA: ISVESTIYA AKADEMII NAUK SSSR, SERIYA GEOLOGICHESKAYA, V. 1983, P. 91-104.

  • Deposit

    ANON, 1992, NICARAGUAN PRIVITIZATION: MINING JOURNAL, LONDON, SEPTEMBER 11, 1992, V. 319, NO. 8190, P. 175.

  • Deposit

    U.S. EMBASSY MANAGUA, 1993, A LOOK AT NICARAGUA'S MINIG SECTOR: DEPARTMENT OF STATE CABLE, 8/93.

  • Deposit

    CHRISTIE, BRIAN, 1994, TRITON BOOSTS RESERVES AT NICARAGUAN MINE: THE NORTHERN MINER, V.80, NO. 31, P.1.

  • Production

    ROBERTS AND IRVING, 1957.

  • Reserve-Resource

    MINING JOURNAL (1992).

General comments

Subject category Comment text
Deposit THICKNESS RANGES FROM 6-15 FT. COMPRISED OF 2 PRINCIPAL VEINS ABOUT 4000 FT APART (1) LA INDIA AND ANOTHER; WIDTH = DEPTH; VEIN COMPOSED OF FINE-GRAINED QUARTZ. SEVERAL GENERATIONS OF QUARTZ, LATE CALCITE IN SOME VEINS, CEMENT OF BRECCIA. TEMPERATURE OF FORMATION 150-200 DEGREES C, AU/AG=1, AVERAGE AU CONTENT 7.8 G/T, AU IS FINE GRAINED, RARELY FORMS AGGREGATES UP TO 200 MICRONS. THICKNESS AND GOLD VALUES APPARENTLY DO NOT DECREASE WITH DEPTH IN MOST VEINS.
Deposit MOST OF THE INFORMATION COMES FROM "GREY" LITERATURE. THICKNESS AND GOLD VALUES APPARENTLY DON'T DECREASE WITH DEPTH IN MOST VEINS. MILL CAPACITY ABOUT 300 TONS/DAY. ; INFO.SRC : 1 PUB LIT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-90 Bliss, James D. U.S. Geological Survey
Updater 01-FEB-92 Page, Norman J. U.S. Geological Survey
Updater 01-SEP-92 Venable, Margaret U.S. Geological Survey
Updater 01-DEC-93 Page, Norman J. U.S. Geological Survey
Updater 10-FEB-95 Page, Norman J. U.S. Geological Survey

Beyond USGS

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

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