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Marudi Mountain

Past Producer in Guyana 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. Alteration
  8. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Ore body information
  12. Economic information about the deposit and operations
  13. Mining district
  14. Ownership information
  15. Production statistics
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10060955
MRDS ID TC32059
Record type Site
Current site name Marudi Mountain
Alternate or previous names Marudi Mine, Rupununi Gold Mines Ltd., Mazoa Hill

Geographic coordinates

Geographic coordinates: -59.17376, 2.22341 (WGS84)
Relative position 320 MILES SOUTH OF GEORGETOWN

Site location context

Political divisions (FIPS codes)

Guyana(country)

South America(continent)

Land(continent)

Geographic areas

Country
Guyana

Commodities

Commodity Importance
Gold Primary

Comments on the commodity information

  • NUGGETS UP TO 14 OZ AU.

Materials information

Materials Type of material
Chalcopyrite Ore
Gold Ore
Pyrite Ore
Pyrrhotite Ore
Ankerite Gangue
Calcite Gangue
Quartz Gangue
Sericite Gangue

Alteration

  • (Local) Silicification Over Zone Of 140 Ft

Analytical data

Result 0.1 TO 1.14 OZ/TON AU OVER THICKNESS OF 6-90 FT
Result MOST VALUES IN 0.2 TO 0.4 OZ/TON AU

Mineral occurrence model information

Model code 273
USGS model code 36a
Deposit model name Low-sulfide Au-quartz vein
Mark3 model number 27

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock
    Rock unit name Marudi Group
    Rock description Marudi Group
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic

Nearby scientific data

(1) -59.17376, 2.22341
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Economic information

Ore body information

  • Strike N42W
    Dip 53W
    Thickness 3.66M

Comments on the geologic information

  • MARUDI GROUP CONSISTS OF PHYLLITE, METASILTSTONE, MUSCOVITE-BIOTITE SCHIST, QUARTZITE, AND AMPHIBOLITE AS PENDANTS IN SOUTHERN GUYANA GRANITE NEAR WHICH IT IS INCREASING MIGMITIZED. FIRST DEFORMATION ABOUT NE AXES OF TIGHT, STEEPLY INCLINED, GENTLY PLUNGING FOLDS WHICH WERE REFOLDED ON NW AXES IN NUMBER OF OPEN BUCKLES WITH STEEP PLUNGES AND STEEPLY INCLINED AXIAL PLANES.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Significant No
Discovery year 1947

Mining district

District name Rupununi District

Ownership information

  • Type Operator
    Owner Rupununi Gold Mining Co. (Canada), Ltd ; Sutton Resources )
    First year 1946
    Last year 1949

Production statistics

  • Year 1949
    Period 1946-1949
    Material AU
    Description Cp_Grade: ^0.5 Oz/Ton
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Gold Gold 14g/mt

Comments on the production information

  • ORE IS ROTTEN QUARTZITE ON MAZOA RIDGE, ONLY WASHED, NO CRUSHING.

Comments on the reserve resource information

  • ORE (1) DRILL INDICATED RESOURCE AT MAZOA; ORE (2) POSSIBLE ORE AT MAZOA; ORE (3) POSSIBLE RESOURCE AT MARUDI. ORE (4) COMBINED RESOURCES OF MAZOA AND MARUDI MOUNTAIN.

Comments on development

  • RUPUNUNI GOLD MINING CO. FOUND 4 GEOCHEMICAL (AU) ANOMALIES BY PANNING AND TESTED BY DIAMOND DRILLING. BEST INTERSECTIONS IN DDH 43 OF 0.21 OZ/TON AU OVER 22 FT AND 0.63 OZ/TON OVER 15.9 FT. DRILLED 54 HOLES WITH TOTAL FOOTAGE OF 30,559 FT. MAZOA DEPOSIT OPEN AT DEPTH AND MAYBE OPEN PIT ABLE WITH STRIPPING RATIO OF 2.5:1 OR GREATER (1994).

Reference information

Bibliographic references

  • Deposit

    MACDONALD, J.R., 1968, A GUIDE TO MINERAL EXPLORATION IN GUYANA: GEOLOGICAL SURVEY OF GUYANA, BULLETIN 38, P. 61-64.

  • Deposit

    BARRON, C.N., 1962, THE GEOLOGY OF THE SOUTH SAVANAS DEGREE SQUARE: GEOLOGICAL SURVEY OF BRITISH GUIANA BULLETIN NO. 33, 29 P.

  • Deposit

    BERRANGE, J.P., 1977, THE GEOLOGY OF SOUTHERN GUYANA, SOUTH AMERICA: INSTITUTE OF GEOLOGICAL SCIENCES OVERSEAS MEMOIR 7, 112 P.

  • Deposit

    ANON., 1994, MARUNDI UPDATE: MINING JOURNAL, LONDON, FEBRUARY 25, 1994, P. 136.

  • Deposit

    ANON., 1994, SUTTON RESUMES GUYANA DRILLING: THE NORTHERN MINER, V. 80, NO. 37, P. 3.

  • Other Database

    CIMRI

  • Production

    BARRON (1962).

General comments

Subject category Comment text
Deposit SERIES OF PARALLEL VEINS IN WIDTH OF 140 FT (7 OR 8 VEINS). THICKNESS IS WIDTH OF VEIN. ALSO DISSEMINATED IN QUARTZITES; ASSOCIATED ALLUIVIAL DEPOSITS ESTIMATED AT 515,000 CU YDS AT 0.0117 OZ/ CU YD. MAZOA DEPOSIT IS FAULTED OFF AT BOTH ENDS.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1992 Page, Norman J. U.S. Geological Survey
Updater 01-AUG-1994 Page, Norman J. U.S. Geological Survey
Updater 02-MAR-1995 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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