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Santa Rosa Gold Deposit

Prospect in Veraguas, Panama with commodities Gold, Silver
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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. Ownership information
  14. Reserves and resources
  15. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10097366
MRDS ID TC01932
Record type Site
Current site name Santa Rosa Gold Deposit
Alternate or previous names Concession Area Includes Alto De La Mina, Otero, Cerro Alzado,, Las Huacas, and Santa Rosa, Veraguas Concession, Santa Rosa Concession

Geographic coordinates

Geographic coordinates: -81.22235, 8.29895 (WGS84)
Elevation 200
Relative position 40 KM FROM SANTIAGO, 1 KM S OF CANAZAS

Site location context

Political divisions (FIPS codes)

Veraguas(province)

Panama(country)

North America(continent)

Land(continent)

Geographic areas

Country State
Panama Veraguas

Comments on the location information

  • ON AND AROUND CERRO SANTA ROSA

Commodities

Commodity Importance
Gold Primary
Silver Primary

Comments on the commodity information

  • ELECTRUM AT MARGINS AND INSIDE PYRITE. GOLD DEPOSITION PRECEDED BY PYRRHOTITE, ACCOMPANIED BY PYRITE TRACES OR MARCASITE AND ARSENOPYRITE, AG UP TO 30% OF ELECTRUM; CU+PB+ZN EXCEEDS 300 PPM; THREE SEGMENTS OF BODY HAVE VARIABLE AG/AU RATIOS OF 6,3, AND 1.

Materials information

Materials Type of material
Acanthite Ore
Electrum Ore
Pyrite Ore
Pyrrhotite Ore
Ruby Ore
Silver Ore
Calcite Gangue
Quartz Gangue
Siderite Gangue

Alteration

  • (Local) Silicification And Hydrothermal Breccias On Ring Faults Accompanied By Adularia, Up To 2% Pyrite And Several G Au; Outward Carbonate With Central Siderite-Magnesite To Dolomite To Calcite; Outward Argillazation With Kaolinite-Montmorillonite; Outward Propyllitic With Chlorite. Zones In Part Overpalling And Gradational. Overprinted With Meteroic Oxidation And Supergene Clay Weathering 20-40 M Thick

Mineral occurrence model information

Model code 150
USGS model code 25c
Deposit model name Epithermal vein, Comstock
Mark3 model number 16

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite
    Rock unit name Canazas Formation;Canazas Formation
    Rock description Canazas Formation;Canazas Formation
    Stratigraphic age (youngest) Miocene
    Stratigraphic age (youngest) Miocene
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Pyroclastic Rock > Tuff
    Rock unit name Snata Rosa Tuff
    Rock description Snata Rosa Tuff

Nearby scientific data

(1) -81.22235, 8.29895
ListMap

Economic information

Ore body information

  • General form VEINS, DISSEMINATED

Comments on the geologic information

  • SANTA ROSA TUFF IS AGGREGATE OF LOBES, LENSES, WEDGES OF VOLCANICLASTIC EJECTA MARGINAL TO A MAAR CRATER DOMINATED BY LAPILLI TUFF BUT WITH PUMICEOUS CLASTS UP TO BOULDER SIZE, FINER TUFFS SHOW GRADED BEDDING, CROSS-BEDDING, SOFT SEDIMENT. DEFORMATION, ANGULAR UNCONFORMITIES OF REPEATED ERUPTIONS AND EROSION. TUFF HAS HIGH POROSITY AND PERMEABILITY. TWO SETS OF FAULTS (1) PRE-MINERAL, NS EARLY REGIONAL FAULTS AND CALDERA RING FAULT SYSTEM; (2) POST-MINERAL PIE-WEDGE LIKE RADIAL FAULTS.

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic
Significant No
Discoverer Pre-Colombian

Ownership information

  • Type Owner
    Owner Freeport Exploration Co., Freeport De Panama
    First year 1985
    Last year 1990
  • Type Joint Venture Owner
    Owner Mina Santa Rosa, S. A. (Msr)
    First year 1990
  • Type Joint Venture
    Owner Boliden International Mining
    First year 1990
  • Type Joint Venture
    Owner Greenstone Resources
    First year 1990
  • Type Operator
    Owner Arlo Resources Ltd.
    First year 1994

Comments on the production information

  • SANTA ROSA, S.A. EXPECTS TO MINE 55,000 OUNCES IN FIRST YEAR OF OPERATION STARTING IN MAY, 1994. IN FULL PRODUCTION COULD YIELD 100,000 OUNCES PER YEAR.

Reserves and resources

  • Type In-situ
    Estimate year 1990
    Total resources 113000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 2.1 g/mt Gold Major 1990
  • Type In-situ
    Estimate year 1990
    Total resources 124000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 1.897 g/mt Gold Major 1990
  • Type In-situ
    Estimate year 1990
    Total resources 11000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 1.6 g/mt Gold Major 1990
  • Type In-situ
    Estimate year 1993
    Total resources 65000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 1.7 g/mt Gold Major 1993
  • Type In-situ
    Estimate year 1994
    Total resources 124000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 1.49 g/mt Gold Major 1994

Comments on the reserve resource information

  • ORE(1) FREEPORT'S GEOLOGICAL RESERVE WITH ABOUT HALF AT A GRADE OF 1.7 G/T AU ORE. ORE(2) MSR'S DRILL-INDICATED MINEABLE RESERVE WITH GEOLOGICAL RESERVE ABOUT TWICE AS LARGE. ORE (3) PROVED AND PROBABLE MINEABLE RESERVE.

Workings at the site

  • Type of workings Surface
    Area 12756300HA

Comments on the workings information

  • PLANNED AMEOBA-SHAPED PIT ABOUT 660 M LONG AND 260 M WIDE. AVERAGE WASTE TO ORE STRIPPING RATIO: 2.4:1

Comments on development

  • 73 CORE 177 REVERSE CIRCULATION HOLES TOTALLY 30,000 M; 100,000 OZ/YEAR ANTICIPATED INVESTMENT OF $25 M. ENGINEERING AND METALLURGICAL STUDIES CONFIRM THAT THE DEPOSIT CAN BE MINED BY OPEN-PIT, HEAP-LEACH METHODS. MSR INCLUDED 13,000 M OF INFILL AND DEFINITION REVERSE CIRCULATION DRILLING.

Reference information

Bibliographic references

  • Deposit

    ANONYMOUS, 1991, REPUBLICA DE PANAMA MAPA GEOLOGICO: DGRM 1:500,000

  • Deposit

    ANONYMOUS, 1988, PROYECTO INVENTARIO MINERO: DGRM-SGAB INFORME 88-7 MAPA METALOGENETICO

  • Deposit

    MINING JOURNAL, LONDON, JUNE 29, 1990, P. 513.

  • Deposit

    THE NORTHERN MINER, SEPTEMBER 3, 1990, P. 17.

  • Deposit

    DGRM-ONU, 1969, MAPA DE OCCURENCIAS MINERALES EN ESCALA 1:500,000

  • Deposit

    WHITE, D.C., 1993, GEOLOGY AND MINERALIZATION OF THE SANTA ROSA GOLD DEPOSIT, PANAMA: SME PREPRINT 93-31 FOR SME MNN. MEETING RENO, NV., FEBRUARY 15-18, 1993, 5 P.

  • Deposit

    U.S. EMBASSY, 1993, PANAMA CABLE.

  • Deposit

    DAWSON, STEVEN, 1994, GREENSTONE HIKES SANTA ROSA RESERVES: THE NORTHERN MINER, AUGUST 8, 1994, V. 80, NO. 23, P. 1.

  • Other Database

    CIMRI

General comments

Subject category Comment text
Deposit HAS SOME MAGNETIC COVERAGE. HAS SOME SOIL AND ROCK GEOCHEMISTRY ; INFO.SRC : 1 PUB LIT
Deposit FORMS ON NORTH PART OF RING-FAULT SYSTEM AS DISSEMINATED DEPOSIT IN SANTA ROSA TUFF; BROKEN UP BY POST-MINERAL RADIAL FAULTS. MOST ELECTRUM 5-40 MICRON IN SIZE WITH 5-15% IN 75-250 MICRON SIZE. THERE ARE 5 DEPOSITS TO BE MINED FROM 2 OPEN PITS: ALTO DE LA MINA, SANTA ROSA A,B,C,D. DEPOSITS OCCUR WITHIN A POROUS PYROCLASTIC UNIT SANDWICHED BETWEEN 2 ANDESITIC UNITS.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-1991 Pierce, Herbert A. U.S. Geological Survey
Updater 01-OCT-1994 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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