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Lake Ellen Kimberlite

Past Producer in Iron county in Michigan, United States with commodity Diamond
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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. Host and associated rocks
  9. Nearby scientific data
  10. Economic information about the deposit and operations
  11. Bibliographic references
  12. General comments
  13. Reporter information

Geologic information

Identification information

Deposit ID 10310195
MRDS ID LW00195
Record type Site
Current site name Lake Ellen Kimberlite

Geographic coordinates

Geographic coordinates: -88.17698, 46.175 (WGS84)
Relative position 15 K NORTHEAST OF CRYSTAL FALLS, MI; 1.5 MI WEST OF LAKE ELLEN

Site location context

Political divisions (FIPS codes)

Iron(county)

Michigan(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Kiernan(quadrangle 1:24,000 scale)

Iron River(quadrangle 1:100,000 scale)

Iron River(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Michigamme(hydrologic unit)

Northwestern Lake Michigan(hydrologic accounting unit)

Northwestern Lake Michigan(hydrologic subregion)

Great Lakes(hydrologic region)

Geographic areas

Country State County
United States Michigan Iron

Public Land Survey System information

Meridian Township Range Section Fraction State
T44N R31W SW 1/4/2005 Michigan

Comments on the location information

  • TWO KNOW EXPOSURES AT LOCATION

Commodities

Commodity Importance
Diamond Primary

Comments on the commodity information

  • LAKE ELLEN KIMBERLITE WAS EXPLORED FOR DIAMONDS IN THE 1980S. SEVERAL SMALL DIAMONDS WERE REPORTED FOUND.

Materials information

Materials Type of material
Diamond Ore

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic)
    Rock unit name Hemlock Formation
    Rock description Hemlock Formation
    Stratigraphic age (youngest) Paleoproterozoic
  • Host or associated Host
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Peridotite > Kimberlite
    Rock unit name Lake Ellen Kimberlite
    Rock description Lake Ellen Kimberlite
    Stratigraphic age (youngest) Ordovician

Nearby scientific data

(1) -88.17698, 46.175
ListMap

Economic information

Comments on the geologic information

  • THE LAKE ELLEN KIMBERLITE IS INTRUDED INTO VOLCANIC ROCK OF THE PALEOPROTEROZOIC HEMLOCK FORMATION, PART OF THE MARQUETTE RANGE SUPERGROUP. THE WEATHERED EXPOSURES OF THE KIMBERLITE ARE HEAVILY IRON-STAINED RUBBLE CONSISTING OF FRAGMENTS ABOUT 1 CM IN DIAMETER. THE RUBBLE FRAGMENTS ARE A MIXTURE OF FINE- TO MEDIUM-GRAINED KIMBERLITE AND INCLUSIONS OF A VARIETY OF OTHER ROCKS. THE KIMBERLITE IS COMPOSED OF OLIVINE (IN PART SERPENTINIZED), PYROXENE, MICA, GARNET, AND ILMENITE. A COMMON INCLUSION IN KIMBERLITE IS DOLOMITE, PERHAPS DERIVED FROM THE ORDOVICIAN BLACK RIVER GROUP.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Non-metallic
Significant No
Discovery year 1971
Discoverer Klaus Schulz and William Spence,

Reference information

General comments

Subject category Comment text
Deposit TWO SMALL EXPOSURES OF RUBBLY REDDISH-BROWN, HIGHLY WEATHERED KIMBERLITE ALONG THE ROADBED OF AN ABANDONED LOGGING ROAD. THE TWO EXPOSURES ARE ABOUT 120 M APART AND PROVIDE A MINIMUM DIMENSION OF THE BODY. A MAGNETIC SURVEY DEFINES AN ELLIPTICALLY SHAPED POSITIVE MAGNETIC ANOMALY (EXPOSED KIMBERLITE IS HIGHLY MAGNETIC), ABOUT 180 M LONG IN A EAST-WEST DIRECTION AND 120 M WIDE.

Reporter information

Type Date Name Affiliation Comment
Reporter 25-MAR-2004 Woodruff, Laurel G. U.S. Geological Survey

Beyond USGS

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

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