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Ritchie Creek Propsect

Prospect in Price county in Wisconsin, United States with commodities Copper, Gold, Zinc
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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. Geologic structures
  12. Ore body information
  13. Economic information about the deposit and operations
  14. Mining district
  15. Reserves and resources
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10082577
MRDS ID W060003
Record type Site
Current site name Ritchie Creek Propsect

Geographic coordinates

Geographic coordinates: -90.05677, 45.48833 (WGS84)
Relative position NORTHEAST OF SPIRIT, WI.

Site location context

Political divisions (FIPS codes)

Price(county)

Wisconsin(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Spirit(quadrangle 1:24,000 scale)

Medford(quadrangle 1:100,000 scale)

Rice Lake(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Wisconsin(hydrologic unit)

Wisconsin(hydrologic accounting unit)

Wisconsin(hydrologic subregion)

Upper Mississippi(hydrologic region)

Geographic areas

Country State County
United States Wisconsin Price

Commodities

Commodity Importance
Copper Primary
Gold Secondary
Zinc Critical Tertiary

Comments on the commodity information

  • WELL-DEVELOPED REPLACEMENT TEXTURES IN CARBONATE-RICH EXHALITE UNITS. TYPICAL CU-TYPE VMS DEPOSITS IN WISCONSIN CONTAIN: PYRITE, CHALCOPYRITE, TETRAHEDRITE, TENNANTITE, CHALCOCITE, BORNITE, GOLD TELLURIDES, LEAD TELLURIDE, ELECTRUM, GOLD, ARSENOPYRITE, SPHALERITE (SOMETIMES GALENA, MAGNETITE, PYRRHOTITE)

Materials information

Materials Type of material
Bornite Ore
Chalcocite Ore
Chalcopyrite Ore
Electrum Ore
Gold Ore
Magnetite Ore
Pyrite Ore
Pyrrhotite Ore
Tennantite Ore
Tetrahedrite Ore

Alteration

  • (Local) Upper Greenschist To Lower Amphibolite Facies. In The Main Zone There Is Partial Replacement Of Previously Deposited Exhalite.

Mineral occurrence model information

Model code 184
USGS model code 28a
Deposit model name Massive sulfide, kuroko
Mark3 model number 93

Host and associated rocks

  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite
    Rock unit name Quartz-Sericite Schists
    Rock description Quartz-Sericite Schists

Nearby scientific data

(1) -90.05677, 45.48833
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Steeply Dipping Isoclinally Folded To Locally Gently Dipping Volcanic Sections.
Type of structure Local
Structure description Main Zone Is At The Western Edge Of A Felsic Center Developed On The Flanks Of A Mafic Volcanic-Intrusive Complex

Ore body information

  • Name RITCHIE CREEK
    Length 304.8M
    Width 16.76M
    Depth to bottom 365.76M

Comments on the geologic information

  • EDGE OF LARGER FELSIC CENTER; DEPOSIT IS IN PART A REPLACEMENT OF PREEXISTING INTERBEDDED CHEMICAL EXHALITES BY LATE-STAGE STRINGER SULFIDE MINERALIZATION. LABERGE SUGGESTS THAT THESE METASEDIMENTS WERE DEPOSITED IN A NUMBER OF BASINS FORMED BY FAULT GRABENS DURING THE LATE PENOKEAN OROGENY. THE DEPOSIT OCCURS IN TUFFACEOUS METASEDIMENTS AND LESSER GRAPHITE- AND/OR SULFIDE-BEARING META-ARGILLITE, PORPHORITIC AND/OR AMYGDALOIDAL METABASALT TO META-ANDESITE FLOWS. SYNGENETIC STRATA-BOUND AND STRATIFORM MASSIVE SULFIDE MINERALIZATION AT OR NEAR THE STRATIGRAPHIC TOP OF OR DEEPER WITHIN PFV OR ALONG THE FLANKS OF THE CENTER. METAMORPHIC GRADE: CHLORITE-EPIDOTE-MUSCOVITE-ALBITE-QUARTZ (LOWER GREENSCHIST FACIES) TO BIOTITE-MUSCOVITE-ALBITE-QUARTZ (MIDDLE GREENSCHIST FACIES).

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic
Significant No
Discovery year 1979
Discoverer Central Wisconsin Joint Venture (Getty Mining Co And Ernst K. Lehmann And Assoc. Of Wisc)

Mining district

District name Somo

Reserves and resources

  • Type In-situ
    Estimate year 1996
    Total resources 408000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 2.11 wt-pct Copper Major 1996
    Gold Au 0.282 g/mt Gold Minor 1996
    Zinc Zn 0.37 wt-pct Zinc Trace 1996

Comments on the reserve resource information

  • RESOURCES ARE FOR THE MAIN ZONE. ABOUT 500,000 ST OF THIS MATERIAL HAS BEEN IDENTIFIED AS RESERVES.
  • THESE ESTIMATES ARE FOR THE MAIN ZONE OF MINERALIZATION

Comments on the workings information

  • PROSPECT

Comments on development

  • LOCATED BY AEROMAGNETICS AND FOLLOW-UP DRILLING.

Reference information

Bibliographic references

  • Deposit

    DEMATTIES, 1990, ECON. GEOL., V.85, P. 1908-1916

  • 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.

  • Reserve-Resource

    LABERGE, 1996.

General comments

Subject category Comment text
Deposit TWO ZONES OF MINERALIZATION: THE MAIN ZONE (OR WESTERN LENS) WITH ZN-CU-AU AND THE KIVELA ZONE WITH ZN-PB-CU-AU MINERALIZATION. THE WESTERN LENS HAS ZN, CU, AU. CLASSIFIED BY LABERGE (1996) AS A CU-TYPE VOLCANOGENIC MASSIVE SULFIDE DEPOSIT.
Deposit LABERGE (1996, P. 56, 59) SHOWS CROSS SECTIONS OF THE RITCHIE CREEK DEPOSIT.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-1995 Nicholson, S.W. U.S. Geological Survey
Updater 01-AUG-1996 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.

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