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  3. Mineral Resource Data System (MRDS)

Reef Gold Deposit

Prospect in Marathon county in Wisconsin, United States 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. Mineral occurrence model information
  8. Nearby scientific data
  9. Geologic structures
  10. Ore body information
  11. Economic information about the deposit and operations
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10082582
MRDS ID W060008
Record type Site
Current site name Reef Gold Deposit

Geographic coordinates

Geographic coordinates: -89.35008, 44.96667 (WGS84)
Relative position ABOUT 13 MILES DUE EAST OF WAUSAU.

Site location context

Political divisions (FIPS codes)

Marathon(county)

Wisconsin(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Hatley(quadrangle 1:24,000 scale)

Wausau(quadrangle 1:100,000 scale)

Green Bay(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Lake Dubay(hydrologic unit)

Wisconsin(hydrologic accounting unit)

Wisconsin(hydrologic subregion)

Upper Mississippi(hydrologic region)

Geographic areas

Country State County
United States Wisconsin Marathon

Comments on the location information

  • 1:62500 QUADRANGLE INFORMATION HAS A SLEIGHT MARGIN OF ERROR

Commodities

Commodity Importance
Gold Primary

Materials information

Materials Type of material
Chalcopyrite Ore
Gold Ore
Pyrrhotite Ore

Mineral occurrence model information

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

Nearby scientific data

(1) -89.35008, 44.96667
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Eau Claire River Shear Zone

Ore body information

  • Name REEF

Comments on the geologic information

  • MAFIC VOLCANIC ROCKS--GABBROS AND SERPENTIINES--MAY HAVE OPHIOLITIC AFFINITIES. THE DEPOSIT CONSISTS OF PYRRHOTITE, CHALCOPYRITE AND GOLD IN SILICIFIED SHEAR ZONES AND QUARTZ VEINS THAT CUT THE MAFIC VOLCANIC ROCKS AND GABBROS. VEINLETS HOST GOLD, SILVER,, COPPER AND TELLURIDES. MINERALIZATION MAY BE CLOSELY ASSOCIATED WITH FELSIC DIKES AND SILLS.

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic
Deposit size Small
Significant No

Comments on the reserve resource information

  • THE DEPOSIT IS OPEN AT DEPTH.

Comments on the workings information

  • AT LEAST 80 CORE HOLES HAVE BEEN DRILLED IN THE AREA IN AN EFFORT TO CHARACTERIZE THE MINERALIZATION.

Comments on development

  • ECON.COM: THE DEPOSIT WAS EXAMINED BY A NUMBER OF COMPANIES IN THE MID-1970S.

Reference information

Bibliographic references

  • Deposit

    LABERGE, G.L., ED., VOLCANOGENIC MASSIVE SULFIDE DEPOSITS OF NORTHERN WISCONSIN--A COMMEMORATIVE VOLUME: INSTITUTE ON LAKE SUPERIOR GEOLOGY, PROCEEDINGS, V. 42, PT. 2 (GENERAL REFERENCE FOR WISCONSIN VMS DEPOSITS)

General comments

Subject category Comment text
Deposit THE MINERALIZED AREA IS ONE OF INTENSE DEFORMATION NEAR THE EAU CLAIRE RIVER SHEAR ZONE JUST WEST OF THE WESTERN MARGIN OF THE WOLF RIVER BATHOLITH.
Deposit MINERALIZATION WAS FIRST RECOGNIZED DURING GEOLOGIC MAPPING IN 1970. EPIGENETIC GOLD MINERALIZATION IN SHEARED ROCKS OF THE REEF DEPOSIT SUGGESTS THAT OTHER MYLONITIC ZONES ALSO MAY HAVE POTENTIAL FOR GOLD MINERALIZATION.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-1995 Nicholson, S.W. U.S. Geological Survey
Updater 01-MAR-1997 Sutphin, David M. U.S. Geological Survey
Editor 01-MAY-1997 Mason Jr., G.T. U.S. Geological Survey

Beyond USGS

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

Maps centered on this site