North Kearsarge Mine

Past Producer in Houghton county in Michigan, United States with commodity Copper

Sections on this page

Identification information
Geographic coordinates
Site location context
Geographic areas
Public Land Survey System information
Commodities
Materials information
Mineral occurrence model information
Host and associated rocks
Nearby scientific data
Ore body information
Economic information about the deposit and operations
Mining district
Bibliographic references
General comments
Reporter information

Geologic information

Identification information

Deposit ID	10082873
MRDS ID	W062237
Record type	Site
Current site name	North Kearsarge Mine

Geographic coordinates

Geographic coordinates:	-88.40838, 47.27222 (WGS84)

Site location context

Political divisions (FIPS codes)

Houghton(county)

Michigan(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Ahmeek(quadrangle 1:24,000 scale)

Hancock(quadrangle 1:100,000 scale)

Hancock C(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Keweenaw Peninsula(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	Houghton

Public Land Survey System information

Meridian	Township	Range	Section	Fraction	State
	56N	32W	5, 6		Michigan

Comments on the location information

SHAFT NO. 3.

Commodities

Commodity	Importance
Copper	Primary

Comments on the commodity information

COPPER ARSENIDE MINERALS OCCUR WITH NATIVE COPPER IN FISSURES THAT CROSS-CUT NATIVE COPPER DEPOSITS.

Materials information

Materials	Type of material
Copper	Ore
Feldspar	Gangue
Epidote	Gangue
Quartz	Gangue
Calcite	Gangue

Mineral occurrence model information

Model code	96
USGS model code	Unassigned
Deposit model name	Native Cu
Mark3 model number	99

Host and associated rocks

Host or associated

Host

Rock type

Volcanic Rock (Aphanitic) > Mafic Volcanic Rock > Basalt

Rock unit name

Kearsarge Amygdaloid

Rock description

Kearsarge Amygdaloid

Stratigraphic age (youngest)	Stenian
Chronological age	1095

Nearby scientific data

(1)	-88.40838, 47.27222	ListMap

Economic information

Ore body information

General form TABULAR

General form	TABULAR

Comments on the geologic information

THE KEARSARGE AMYGDALOID RANGES FROM ONE THICK FLOW TO FIVE THINNER FLOWS. THE OPHITIC BASALT FLOW IS LOCALLY PORPHYRITIC. COPPER GRADE IN THE PRODUCTIVE PART OF THE KEARSARGE LODE APPEARS TO HAVE BEEN AS RICH AT OR VERY NEAR THE OUTCROP AS AT GREATER DEPTH, BUT THE REMAINDER OF THE LODE WAS RELATIVELY POOR AT THE SURFACE. AREAS OF LOW GRADE ORE NEAR THE SURFACE ARE COINCIDENT WITH AREAS OF RELATIVELY THIN OR CELLULAR, IMPERMEABLE LODE ROCKS.

Economic information about the deposit and operations

Operation type	Underground
Development status	Past Producer
Commodity type	Metallic
Significant	No

Mining district

District name	Keweenaw Copper

Comments on the workings information

AT WOLVERINE AND NORTH KEARSARGE MINES, THE UPPER LEVELS WERE RELATIVELY POOR AND THE INTERMEDIATE AND LOWER LEVELS WERE DECIDEDLY RICHER IN COPPER.

Reference information

Bibliographic references

Deposit

BUTLER, B.S., AND BURBANK, W.S., 1929, THE COPPER DEPOSITS OF MICHIGAN: USGS PROF PAPER NO. 144, 238 PP.
Deposit

WHITE, W.S., CORNWALL, H.R., AND SWANSON, R.W., 1953, BEDROCK GEOLOGY OF THE AHMEEK QUADRANGLE; USGS MAP GQ-27, SCALE 1:24000

General comments

Subject category	Comment text
Deposit	KEARSARGE WAS ONE OF THE RICHEST LODES - ESPECIALLY NEAR HANGING WALL. LODE AVERAGES 6-13 FEET THICK IN AREA OF MINING ACTIVITY.

Reporter information

Type	Date	Name	Affiliation
Reporter	01-MAR-1996	Sutphin, D.M. (Cannon, W.F.)	U.S. Geological Survey
Updater	01-MAR-1997	Sutphin, D.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.