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Pavones Mine

Past Producer in Guanacaste, Costa Rica with commodity Manganese
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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. Economic information about the deposit and operations
  14. Mining district
  15. Ownership information
  16. Production statistics
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10007864
MRDS ID CS00098
Record type Site
Current site name Pavones Mine
Alternate or previous names Buena Vista Mine

Geographic coordinates

Geographic coordinates: -85.20273, 9.98581 (WGS84)
Elevation 143

Site location context

Political divisions (FIPS codes)

Guanacaste(province)

Costa Rica(country)

North America(continent)

Land(continent)

Geographic areas

Country State
Costa Rica Guanacaste

Comments on the location information

  • 1.5-3 KM SE OF SAN PABLO, IN THE HILLS W OF THE ROAD TO COROZAL. NEAR THE ROAD IS THE HOUSE OF JOSE ARRAYA MENDEZ (SEARS, 1919), AND THE MINE IS ABOUT 180 M UPHILL FROM THIS HOUSE. THE TWO MAIN WORKINGS, THE NE (NO. 1) AND THE SW (NO. 2) PROSPECTS, ARE ABOUT 250 M APART ALONG A N 60 E LINE. A THIRD (NO. 3) MINOR PROSPECT IS SE OF THESE TWO PROSPECTS, ABOUT 250-300 M S OF THE HOUSE. ANOTHER MINOR PROSPECT IS ABOUT 10 M S OF THE NE (NO. 1) WORKING.

Commodities

Commodity Importance
Manganese Critical Primary

Materials information

Materials Type of material
Pyrolusite Ore

Alteration

  • (Local) Silicification

Analytical data

Result FROM THE NE (NO. 1) AND SW (NO. 2) WORKINGS: 51.38 % MN
Result 1.22 % FE
Result AND 1.70 % SILICA

Mineral occurrence model information

Model code 97
USGS model code 24c
Deposit model name Volcanogenic Mn

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Shale

Nearby scientific data

(1) -85.20273, 9.98581
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Small N- And Nw-Trending Faults Offset And Repeat Orebodies

Ore body information

  • General form LENSES, POCKETS, AND VEINS
    Strike N 70 E
    Dip 55-70 NW
    Width 6M

Comments on the geologic information

  • RADIOLARIAN TESTS AND CONTAINING ORGANIC BORINGS. THE 70-CM-THICK ZONE IS IN TURN OVERLAIN BY BASALT OF THE HANGING WALL. THE SW (NO. 2) WORKINGS EXPLORE AN 2.5-3-M-WIDE ORE ZONE ON STRIKE WITH THE NE (NO. 1) WORKINGS, AND CONTAIN THREE JASPER LENSES LOCALLY FAULTED BUT NOT STRONGLY SHEARED. THE NE (NO. 1) AND SW (NO. 2) OREBODIES MAY CONNECT BASED ON THE TREND ALONG BEDDING AND THE FLOAT TRACED PARTLY BETWEEN THE TWO PROSPECTS. PROSPECT NO. 3 TO THE SE IS EXPLORED BY TWO SHALLOW PITS ON TOP OF A SMALL ROUNDED HILL. LACK OF OUTCROPS OR EXPOSURES OBSCURES THE GEOLOGY, BUT NO. 3 IS NOT THOUGHT TO BE CONNECTED WITH THE NE (NO. 1) OR SW (NO. 2) PROSPECTS.
  • SEARS (1919) STATES THAT THE NE (NO. 1) WORKINGS EXPLORE A NE-TRENDING, 6-M-WIDE ORE ZONE BETWEEN A FOOTWALL (SOUTH WALL) OF DEEPLY WEATHERED ROCK, POSSIBLY A VERY COARSE-GRAINED BRECCIA OR IGNEOUS ROCK AND A HANGING WALL (NORTH WALL) OF METAMORPHOSED YELLOWISH SHALE. ROBERTS (1944), ON THE OTHER HAND, STATES THAT THIS ORE ZONE IS IN JASPERIZED SHALE THAT IS BETWEEN A FOOTWALL OF ALTERED IGNEOUS BRECCIA AND A HANGING WALL OF MASSIVE IGNEOUS ROCK (BOTH DESCRIBED ELSEWHERE AS BASALT). THE ORE IS LOCALLY BRECCIATED BY SHEARING PARALLEL TO BEDDING AND CONTAINS FRAGMENTS OF JASPER AND BASALT. KUYPERS AND DENYER (1979) SHOW THE SEQUENCE AT THE NE (NO. 1) DEPOSIT AS FOLLOWS: A BASAL (FOOTWALL) JASPER-VEINED BASALT IS OVERLAIN BY A 2.5-M-THICK ZONE OF MANGANIFEROUS YELLOW JASPER, WHICH LOCALLY CONTAINS METER-SIZED POCKETS OF JASPER-VEINED BASALT. THE 2.5-M-THICK ZONE IS IN TURN OVERLAIN BY A 70-CM-THICK ZONE OF MANGANIFEROUS YELLOW JASPER, WITH THE MN OXIDES IN THIS LAYER REPLACING

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Year of last production 1918

Mining district

District name Nicoya-Pavones District

Ownership information

  • Type Operator
    Owner E. W. Creevy
  • Type Owner
    Owner Dario Zuniga

Production statistics

  • Year 1918
    Period 1918
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Manganese Manganese 51wt-pct

Comments on the production information

  • ORE MINED FROM THE NE (NO. 1) AND SW (NO. 2) PROSPECTS.

Comments on the reserve resource information

  • ACCORDING TO ROBERTS (1944), "A FEW HUNDRED METRIC TONNES OF HIGH-GRADE ORE MAY STILL BE OBTAINABLE BY SELECTIVE MINING AND SORTING." IF CONTINUITY BETWEEN THE NE (NO. 1) AND SW (NO. 2) DEPOSITS, WHICH ARE ABOUT 250 M APART, COULD BE DEMONSTRATED, THEN THE POTENTIAL FOR THE MINE WOULD BE MORE PROMISING. ALTHOUGH THE STEEP DIP SUGGESTS THAT THERE MAY BE MORE ORE AT DEPTH, THE SPORADIC NATURE OF THE ORE (MAKING UP LESS THAN 50 % OF THE ORE ZONE) DISCOURAGES FURTHER WORK.
  • E. W. CREEVY PILED THE ORE ON DUMPS DURING EXPLORATORY WORK.

Comments on the workings information

  • SEVERAL OPEN CUTS; ONE, IN THE NE (NO. 1) WORKINGS, IS 18 M HIGH.

Comments on development

  • LAST EXPLORATORY WORK DONE IN 1939.

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit SMALL SPORADIC LENSES, POCKETS, AND VEINS IN AN ORE ZONE AVERAGING 6 M WIDE AND PARALLEL TO BEDDING, LOCALLY OFFSET AND REPEATED BY SMALL FAULTS. ORE THOUGHT TO REPLACE JASPERIZED SHALE. SEE GEOLOGY COMMENTS.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-1986 Howe, Stephen S. U.S. Geological Survey PARSED HOST ROCK AND ASSOCIATED ROCK INFORMATION FROM OLD SINGLE VALUED FIELD TO NEW MULTIVALUED FIELD
Editor 27-APR-1995 Mosier, Dan U.S. Geological Survey

Beyond USGS

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

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