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  3. Mineral Resource Data System (MRDS)

Silver Creek West

Prospect in Marquette county in Michigan, 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. Public Land Survey System information
  6. Commodities
  7. Materials information
  8. Alteration
  9. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Mining district
  15. Ownership information
  16. Reserves and resources
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10310194
MRDS ID LW00194
Record type Site
Current site name Silver Creek West

Comments on the site names

  • NUMBER OF AU PROSPECTS IN AREA RELATED TO SILVER CREEK WEST, INCLUDING SILVER CREEK PROSPECT, NORTH SECTION 10 PROSPECT, SOUTH SECTION 10 PROSPECT, CENTRAL SECTION 14 PROSPECT, AND ANOMALOUS ZONE. AREA CONTAINS 4 OLD SHAFTS AND TRENCHES.

Geographic coordinates

Geographic coordinates: -87.77224, 46.62889 (WGS84)

Site location context

Political divisions (FIPS codes)

Marquette(county)

Michigan(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Silver Lake Basin(quadrangle 1:24,000 scale)

Marquette(quadrangle 1:100,000 scale)

Marquette(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Dead-Kelsey(hydrologic unit)

Southcentral Lake Superior(hydrologic accounting unit)

Southern Lake Superior(hydrologic subregion)

Great Lakes(hydrologic region)

Geographic areas

Country State County
United States Michigan Marquette

Public Land Survey System information

Meridian Township Range Section Fraction State
Michigan T49N R28W 23 Michigan

Commodities

Commodity Importance
Gold Primary

Comments on the commodity information

  • MINERALIZED ZONE IS ASSOCIATED WITH WEAKLY DISSEMINATED CALCITE-CHLORITE-SERICITE-PYRITE ALTERATION. LOCALLY, MINOR FE-CARBONATE IS OBSERVED AT SURFACE AND IN FELSIC UNITS ENCOUNTERED IN DRILLING. AN EARLY EPIDOTE-PYRRHOTITE (SPILLITE) EVEN IS TENTATIVELY RECOGNIZED (BORNHORST ET AL., 1999).

Materials information

Materials Type of material
Gold Ore
Quartz Gangue
Pyrite Gangue
Sericite Gangue
Ankerite Gangue
Cubanite Gangue
Pyrrhotite Gangue
Arsenopyrite Gangue
Galena Gangue
Sphalerite Gangue

Alteration

  • (Local) Carbonization

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Porphyry
    Rock unit name Lighthouse Point Basalt
    Rock description Lighthouse Point Basalt
    Stratigraphic age (youngest) Archean

Nearby scientific data

(1) -87.77224, 46.62889
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Dead River shear zone

Controls for ore emplacement

  • Occurrence of sulfide mineralization

Comments on the geologic information

  • SILVER CREEK WEST IS A GOLD OCCURRENCE WITHIN VARIABLY ALTERED AND FOLIATED MAFIC ROCKS. SURFACE TRENCHING EXPOSED GOLD MINERALIZATION IN DUCTAL SHEARED AND CARBONATE-CHLORITE-SERICITE-PYRITE ALTERED BASALTS NEAR THE MARGIN OF A FELSIC PORPHYRY. IN DRILL HOLE INTERSECTIONS, MINERALIZATION APPEARS TO BE STRATABOUND WITHIN A 170 FT SECTION OF MODERATELY CARBONATE-ALTERED, MASSIVE, MEDIUM-GRAINED MAFIC ROCK. MINERALIZATION DIRECTLY OF INDIRECTLY RELATED TO FAULTS AND SHEAR ZONES. ALTERATION IS RETROGRADE IN NATURE AND CLEARLY POST-METAMORPHIC AND POST-DEFORMATION. CHLORITIZED, EPIDOTIZED, SERICITIZED, CARBONATIZED, AND SILICIFIED. THIN ZONES OF ALBITIZED GRANODIORITE PRESENT IN AREA.

Economic information about the deposit and operations

Operation type Surface-Underground
Development status Prospect
Commodity type Metallic
Significant No
Discovery year 1988

Mining district

District name Ishpeming Greenstone Belt

Ownership information

  • Type Owner
    Owner Callahan Mining Corporation

Reserves and resources

  • Type In-situ
    Estimate year 1988
    Total resources 1100000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 1.18 g/mt Gold Major 1988

Comments on the workings information

  • SURFACE TRENCHING AND DIAMOND DRILLING.

Reference information

Bibliographic references

  • Deposit

    BORNHORST, T.J., DUSKIN, D.J., JOHNSON, R.C., MAHIN, R.A., QUIGLEY, T.O., AND SCOTT, G.W., 1999, ARCHEAN ISPHEMING GREENSTONE BELT AND GOLD MINERALIZATION, MICHIGAN: INSTITUTE ON LAKE SUPERIOR GEOLOGY PROCEEDINGS, 45TH ANNUAL MEETING, MARQUETTE, MI, V. 45 PART 2, P. 12 - 107.

  • Deposit

    JOHNSON, R.C., BORNHORST, T.J., AND VAN ALSTINE, J.L., 1987, GEOLOGIC SETTING OF PRECIOUS METAL MINERALIZATION IN THE SILVER CREEK TO ISLAND LAKE AREA, MARQUETTE COUNTY, MICHIGAN: MICHIGAN GEOLOGICAL SURVEY DIVISION OPEN FILE REPORT 87-4.

  • Reserve-Resource

    BORNHORST ET AL., 1999.

General comments

Subject category Comment text
Deposit AREA IS DOMINATED BY METAMORPHOSED AND DEFORMED ARCHEAN VOLCANIC AND INTRUSIVE ROCKS. OLDEST ARE ARHEAN PILLOW BASALTS WITH MINOR FELSIC PYROCLASTIC DEPOSITS WHICH ARE INTRUDED BY ARCHEAN GABBRO AND DIABASE. MAFIC ROCKS ARE INTRUDED BY ARCHEAN GRANODIORITE.
Deposit AT SURFACE, GOLD MINERALIZATION EXPOSED BY TRENCHES OCCURS WITHIN A DUCTILE SHEARED MAFIC VOLCANIC NEAR THE MARGINS OF A FELSIC PORPHYRY. MINERALIZED INTERVALS IN DIAMOND DRILL CORE ARE IN UNFOLIATED, WEAKLY ALTERED MAFIC ROCK.

Reporter information

Type Date Name Affiliation Comment
Reporter 04-SEP-2002 Anderson, Arlene (M. Gere) Michigan Department of Natural Resources
Updater 18-NOV-2002 Saari, Stacy (W. Cannon) U.S. Geological Survey

Beyond USGS

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

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