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  3. Mineral Resource Data System (MRDS)

Rio Siuna

Producer in Nicaragua with commodity 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. Host and associated rocks
  8. Nearby scientific data
  9. Ore body information
  10. Economic information about the deposit and operations
  11. Mining district
  12. Reserves and resources
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10061675
MRDS ID TC34609
Record type Site
Current site name Rio Siuna
Alternate or previous names San Pablo

Geographic coordinates

Geographic coordinates: -84.77077, 13.70507 (WGS84)
Elevation 130
Location accuracy 500(meters)

Site location context

Political divisions (FIPS codes)

Nicaragua(country)

North America(continent)

Land(continent)

Geographic areas

Country
Nicaragua

Comments on the location information

  • THE RIO SIUNA DEPOSIT ORIGINATES IN THE HEADWATERS OF THE RIO SIUNA IN THE TOWN OF SIUNA. IT IS SE OF THE OPEN PIT AND EXTENDS AT LEAST 11 KM DOWNSTREAM. THE LAT LONG GIVEN IS AN AVERAGED CENTRALIZED LOCATION. THE ACTUAL DEPOSIT RANGES FROM 13-39-30N TO 13-44-00N AND FROM 084-46-00W TO 084-46-30W.
  • DOWN RIVER ALONG THE YY (WAY) RIVER FROM FORMER DAM/HYDROELECTRIC PLANT. LAT LONG GIVEN ABOVE IS FOR CENTRALIZED LOCATION. THE DEPOSIT ACTUALLY RANGES FROM 13-51-00N TO 13-54-00N AND FROM 084-32-00W TO 084-35-00W. LOCATIONS FOR PROSPECTS ARE AS FOLLOWS: SAN JUAN PROSPECT 13-52-15N, 084-34-30W; LAS BOCAS (PALENQUE) 13-53-15N, 084-32-30W; JIM PAN 13-52-15N, 084-32-15W.

Commodities

Commodity Importance
Gold Primary

Comments on the commodity information

  • THE GOLD IS VERY PURE FOR SIUNA, ABOUT 21 CARAT.

Materials information

Materials Type of material
Gold Ore

Host and associated rocks

  • Host or associated Host
    Rock type Unconsolidated Deposit > Gravel
    Stratigraphic age (youngest) Holocene

Nearby scientific data

(1) -84.77077, 13.70507
ListMap

Economic information

Ore body information

  • Thickness 6M
    Length 11000M

Comments on the geologic information

  • GOLD MAY HAVE ORIGINATED IN THE SIUNA MINE, ALTHOUGH SOME INVESTIGATORS HAVE SUGGESTED ADDITIONAL LOCALIZED SOURCES ALONG THE RIVER.

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Siuna

Reserves and resources

  • Type In-situ
    Estimate year 1990
    Total resources 1500000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 1 g/mt Gold Major 1990

Comments on the reserve resource information

  • FIGURE GIVEN IS FOR POSSIBLE ORE. SEVERAL STUDIES WERE DONE ON THE DEPOSIT BY INMINE AND A SOVIET COMPANY. SMALL MINERS ARE CONTINUOUSLY REDUCING THE TOTAL QUANTITY OF AU.

Comments on the workings information

  • WORKED PRINCIPALLY BY ORGANIZED COOPERATIVES OF SMALL MINERS BY MEANS OF SLUICE BOXES.

Comments on development

  • SOME GEOPHYSICS (SPONTANDOUS POLARIZATION) DONE ON SAN JUAN PROSPECT - NOTHING OF INTEREST FOUND.

Reference information

Bibliographic references

  • Deposit

    VENABLE, M., 1992, PERSONAL OBSERVATIONS AND UNPUBLISHED DOCUMENTS

General comments

Subject category Comment text
Deposit ONE OR MORE N TRENDING FAULTS WITH LIMONITE AND MALACHITE GOUGE CUTTING ACROSS HEAVILY WEATHERED VOLCANICS AT SAN JUAN (OROURKE, 1966). OUTCROPS OF MALACHITE AND CHALCOCITE 20-25NE/50-55NW IN VIOLET GRAY LAVA BEDS, 2 STRINGERS 12-16 IN THICK IN JOHN'S CREEK AND LONG CREEK FLOAT CU OUTCROPS. VUGGY QUARTZ VEIN IN LA BOCA (MCDONALD, 1946). PYRITE AND CHALCOPYRITE QUARTZ VEIN 3.5 M WIDE IN JIM PAN, POSSIBLE FAULT ALONG CREEK (OROURKE, 1966). CHALCOPYRITE BEARING QUARTZ FLOATS CAN BE FOUND IN MOST CREEKS IN THE EL SALTO AREA, LESS OFTEN CHALCOCITE IS FORMED IN GOUGED SHEAR ZONES OR BORNITE AND CHALCOPYRITE IN QUARTZ/CALCITE GANGUE. VISIBLE GOLD, PYRITE AND CHALCOPYRITE IN FIRST QUARTZ VEIN OUTCROPPING ALONG YY RIVER, AND PYRITE AND CHALCOPYRITE (MEILLON, 1970).

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-1992 Carbonaro, Marguerite M. (Venable, M.) U.S. Geological Survey

Beyond USGS

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

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