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Mount Pleasant Mine

Producer in New Brunswick, Canada with commodities Tungsten, Molybdenum, Bismuth, Tin
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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. Host and associated rocks
  9. Nearby scientific data
  10. Geologic structures
  11. Ore body information
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Ownership information
  15. Reserves and resources
  16. Workings at the site
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10056491
MRDS ID TC00512
Record type Site
Current site name Mount Pleasant Mine

Geographic coordinates

Geographic coordinates: -66.81596, 45.43326 (WGS84)
Relative position 35 KM N OF ST. GEORGE

Site location context

Political divisions (FIPS codes)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Fredericton(quadrangle 1:250,000 scale)

Geographic areas

Country State
Canada New Brunswick

Commodities

Commodity Importance
Tungsten Critical Primary
Molybdenum Primary
Bismuth Critical Primary
Tin Critical Primary

Materials information

Materials Type of material
Bismuth Ore
Cassiterite Ore
Molybdenite Ore
Sphalerite Ore
Wolframite Ore
Chlorite Gangue
Dickite Gangue
Fluorite Gangue
Quartz Gangue
Sericite Gangue
Siderite Gangue
Topaz Gangue
Tourmaline Gangue

Alteration

  • (Local) Greisen-Type Alteration, Grades Outward Into Propylitic Alteration; Potassic Alteration Occurs Locally; Propylitic Regional Halo

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
    Stratigraphic age (youngest) Devonian
    Chronological age 360
  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Granite
    Stratigraphic age (youngest) Devonian
    Chronological age 360

Nearby scientific data

(1) -66.81596, 45.43326
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Southwest Margin Of The Mount Pleasant Caldera
Type of structure Local
Structure description Fire Tower Fault

Ore body information

  • General form VEINS, DISSEMINATED PODS, IRREGULAR

Controls for ore emplacement

  • Hydrothermal Breccias

Comments on the geologic information

  • TWO DISTINCT TYPES OF MINERALIZATION OCCURRED IN THE FIRE TOWER ZONE, ONE REPRESENTED BY THE PORPHYRY TUNGSTEN-MOLYBDENUM DEPOSITS AND THE YOUNGER TIN AND POLYMETALLIC ZONES

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Significant No
Discovery year 1954
Discoverer Geochemical Associates
Year of first production 1983

Ownership information

  • Type Operator
    Owner Optioned To Nova Gold Resources Inc. From 6/11/89 For A 15 Month Period
  • Type Owner
    Owner Lac Minerals Ltd. (50%), Billiton Metals Canada Inc. (50%)

Comments on the production information

  • PAST PRODUCTION: 1 MILLION MT OF W-MO ORE.

Reserves and resources

  • Type In-situ
    Name FIRE TOWER ZONE
    Estimate year 1990
    Total resources 9000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Tungsten Wo3 0.4 wt-pct Tungsten Major 1990
    Molybdenum MoS2 0.2 wt-pct Molybdenum Major 1990
  • Type In-situ
    Name NORTH ZONE
    Estimate year 1990
    Total resources 5000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Tin Sn 0.79 wt-pct Tin Major 1990

Workings at the site

  • Type of workings Underground
    Overall depth 400M

Comments on development

  • 1954 DISCOVERY OF BASE METALS. 1959 TIN RECOGNIZED. 1985-1987 LAC-BILLITON TIN PROJECT: UNDERGROUND DEVELOPMENT BULK SAMPLING DRILLING OF NORTH ZONE TIN DEPOSITS. 1989-1990 SURFACE DRILLING BY NOVAGOLD OF SADDLE ZONE. 150,000 M DRILLED. ; MILL.CAP: 2000 T/D ; ECON.COM: CASSITERITE IS CONSIDERED (1990) TO BE CANDIDATE FOR RECOVERY IN FUTURE

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit FIRE TOWER WEST ORE BODY: 275M X 220M X 70M VERTICAL EXTENT FIRE TOWER SOUTH ORE BODY: 150M X 100M X 150M FIRE TOWER NORTH ORE BODY: 350M X 50M X 200M VERTICAL EXTENT
Deposit 3 ZONES: NORTH ZONE, SADDLE ZONE, FIRE TOWER ZONE ; INFO.SRC : 2 UNPUB REPT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-OCT-1990 Bolm, Karen S. U.S. Geological Survey

Beyond USGS

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

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