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High Point Gold Prospect

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. Ore body information
  13. Economic information about the deposit and operations
  14. Mining district
  15. Ownership information
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10310068
MRDS ID LW00068
Record type Site
Current site name High Point Gold Prospect

Geographic coordinates

Geographic coordinates: -87.77641, 46.63194 (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 49N 28W 23 Michigan

Commodities

Commodity Importance
Gold Primary

Comments on the commodity information

  • MINERALIZED QUARTZ IS DARK GRAY, CUT BY IRON CARBONATE VEINLETS, AND CONTAINS SMALL AMOUNTS OF PYRITE, CHALCOPYRITE, GALENA, SPHALERITE, AND ELECTRUM, AS WELL AS BISMUTH TELLURIDES, AND LEAD BISMUTH TELLURIDES.

Materials information

Materials Type of material
Gold Ore
Quartz Gangue
Calcite Gangue
Dolomite Gangue
Ankerite Gangue
Tourmaline 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) -87.77641, 46.63194
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Shear zone

Ore body information

  • Name HIGH POINT INTRUSIVE

Comments on the geologic information

  • GOLD MINERALIZATION IS CONFINED TO A FELSIC, PORPHYRITIC INTRUSIVE UNIT WITHIN A SHEARED SEQUENCE OF MAFIC FLOWS AND TUFFACEOUS ROCKS OF THE LIGHTHOUSE POINT BASALT. THE HIGH POINT INTRUSIVE IS A FINE-MEDIUM GRAINED, MASSIVE TO WEAKLY FOLIATED FELDSPAR PORPHYRY STOCK. ALL ROCK TYPES HAVE BEEN SHEARED AND DEFORMED AS PART OF THE DEAD RIVER SHEAR ZONE. UBIQUITOUS CARBONATE ALTERATION CONSISTING OF CALCITE AND DOLOMITE-ANKERITE IS PRESENT THROUGHOUT THE SHEARED SECTION, OCCURRING AS PERVASIVE REPLACEMENT OF ROCK MATRIX AND DISCRETE VEINS AND FRACTURE FILLINGS IN BOTH MAFIC AND FELSIC UNITS.

Economic information about the deposit and operations

Operation type Underground
Development status Prospect
Commodity type Metallic
Significant No

Mining district

District name Ishpeming Greenstone Belt

Ownership information

  • Type Owner
    Owner Callahan Mining Corporation

Comments on development

  • EXPLORATORY PROSPECT WITH DETAILED MAPPING AND SAMPLING, GEOCHEMICAL SURVEYS, TRENCHING AND DIAMOND DRILLING. CHANNEL CHIP SAMPLING OF EXPOSED OUTCROPS RETURNED 28 FT @ 0.09 OPT AU; 14 FT @ 0.35 OPT; 4 FT @ 1.25 OPT.

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.

General comments

Subject category Comment text
Deposit MAFIC UNITS EXHIBIT STEEPLY DIPPING SHEAR RELATED FOLIATIONS STRIKING NW-SE PARALLEL TO THE SHEAR ZONE, AS WELL AS E-W STRIKING ANCILLARY SHEARING OBLIQUE TO SHEAR ZONE. INTRUSIVE BODY AND RELATED SILLS AND DIKES EXHIBIT INTENSE BRITTLE DEFORMATION MANIFESTED BY IRREGULAR STOCKWORK FRACTURING, QUARTZ-CARBONATE VEINING, AND BRECCIATION. SURFACE MINERALIZATION IS HOSTED BY PROMINENT KNOB OF INTRUSIVE FELSIC PORPHYRY ALONG TOPOGRAPHIC ESCARPMENT OF DEAD RIVER SHEAR ZONE. SURFACE MINERALIZATION IS CONFINED TO PORPHYRY AND CONSISTS OF IRREGULAR GRAY QUARTZ VEINING IN ALTERED PORPHYRY ON THE SE SIDE OF THE MAIN KNOB.

Reporter information

Type Date Name Affiliation Comment
Reporter 04-SEP-2002 Anderson, Arlene (M. Gere) Michigan Department of Natural Resources

Beyond USGS

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

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