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Leonila-Graciela

Past Producer in Lima, Peru with commodities Barium-Barite, Zinc, Lead, Silver, Gold
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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. Mineral occurrence model information
  8. Host and associated rocks
  9. Nearby scientific data
  10. Economic information about the deposit and operations
  11. Ownership information
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10065202
MRDS ID TC40301
Record type Site
Current site name Leonila-Graciela
Alternate or previous names Graciela Claim, Leonila

Geographic coordinates

Geographic coordinates: -76.57029, -11.91231 (WGS84)
Location accuracy 5000(meters)
Relative position 50 KM EAST OF LIMA.

Site location context

Political divisions (FIPS codes)

Lima(province)

Peru(country)

South America(continent)

Land(continent)

Geographic areas

Country State
Peru Lima

Comments on the location information

  • IN RIMAC VALLEY.

Commodities

Commodity Importance
Barium-Barite Critical Primary
Zinc Critical Primary
Lead Primary
Silver Secondary
Gold Secondary

Comments on the commodity information

  • BARITE ORE SPECIFIC GRAVITY = 4.2-4.4 G/CC; OVER 80% BASO4, SOLUBLE SALTS 60 PPM IN LEONILA, 300 PPM IN GRACIELA.

Materials information

Materials Type of material
Barite Ore
Bornite Ore
Chalcopyrite Ore
Molybdenite Ore
Pyrite Ore
Pyrrhotite Ore
Sphalerite Ore
Tetrahedrite Ore

Analytical data

Result VARIOUS DISCORDANT K/AR AGES AND FES CONTENTS OF SPHALERITE.

Mineral occurrence model information

Model code 184
USGS model code 28a
Deposit model name Massive sulfide, kuroko
Mark3 model number 93

Host and associated rocks

  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic)
    Rock unit name Casma Group
    Rock description Casma Group
    Stratigraphic age (youngest) Early Cretaceous
    Stratigraphic age (youngest) Early Cretaceous
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Pyroclastic Rock > Volcanic Breccia (Agglomerate)

Nearby scientific data

(1) -76.57029, -11.91231
ListMap

Economic information

Economic information about the deposit and operations

Development status Past Producer
Commodity type Both
Significant No
Year of first production 1948

Ownership information

  • Type Owner
    Owner International Petroleum Co. (Graciela Claim)
  • Type Operator
    Owner Peruvian Chemical Industry Co. Later Renamed Baramine Co., And Minera Barmine Sa
    First year 1948
  • Type Owner
    Owner National Lead Industries
    First year 1948

Comments on the production information

  • 1960-1980 BARITE PRODUCTION INCREASED BY ADDING AN OPEN PIT TO THE UNDERGROUND; 1976-1979 REACHED A MAXIMUM OF 1000 MT/DAY. SITE IS A DEVELOPED PRODUCER, BUT THE ACTIVITY IS UNKNOWN.

Comments on the reserve resource information

  • METAL PRODUCTION AND RESERVES FOR ALL HIGH-GRADE MASSIVE SULFIDES (?) LEONILA-GRACIELA, JUANITA, SANTA CECILIA.

Comments on development

  • GRACIELA MASSIVE SULFIDE ORES WERE DISCOVERED IN MID-LATE 1970'S, EVALUATED BY DRILLING AND GEOLOGY. ZN AND PB-AG FLOTATION PLANTS PUT IN OPERATION IN 1980 AND 1983 ALONG WITH SHARP DECLINE IN BARITE PRODUCTION. MILLS PRODUCE ABOUT 150 MT/D CONCENTRATE (1987).

Reference information

Bibliographic references

  • Deposit

    VIDAL, C.E., 1987, KUROKO-TYPE DEPOSITS IN THE MIDDLE CRETACEOUS MARGINAL BASIN OF CENTRAL PERU, ECONOMIC GEOLOGY, V. 82, NO. 6 1409-1430

  • Other Database

    CIMRI

  • Production

    VIDAL, C. (1987).

General comments

Subject category Comment text
Deposit FOLDED AND STRATABOUND LENSES OVERLIE MASSIVE SULFIDES IN THE LEONILA-GRACIELA SYNCLINE AND RECUMBENT ANTICLINE OF JUANITA. SILICEOUS STOCKWORKS (IRREGULAR MASSES) UNDERLIE MASSIVE SULFIDE ZONES CONSISTING OF QUARTZ-SERICITE-CHLORITE WITH PYRITE, SPHALERITE, CHALCOPYRITE, GALENA, TETRAHEDRITE, NATIVE AU (USUALLY IN DACITIC ROCKS). LOCATED IN A ROOF PENDANT OF CASMA FACIES SUBMARINE VOLCANICLASTICS, LAVA FLOWS, TUFF BRECCIAS, AND INTERCALCATIONS OF LIMESTONE AND MARL INTRUDED BY AT LEAST 2 SEPARATE UNITS OF THE UPPER CRETACEOUS COASTAL BATHOLITH - RICARDO PALMA TONALITE (K/AR, 82 MY) AND CAUCHACAYLLA MONZOGRANITE (K/AR, 65 MY). MASSIVE SULFIDES ARE BANDED; SULFIDES ARE RECRYSTALLIZED. BARITE LENSES, 80% BARITE, GRANOBLASTIC. METAMORPHOSED TO HORNBLENDE HORNFELS FACIES LOCALLY AT 2.1-2.6 KB AND 300-500 DEGREES C.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-NOV-1993 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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