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Natick Gap Exploration Prospect, Phoenix, Keweenaw Co., Michigan, USA

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Latitude & Longitude (WGS84): 47° 23' 7'' North , 88° 17' 41'' West
Latitude & Longitude (decimal): 47.3852777778, -88.2947222222


Commodities (Major) - Copper
Deposit Type: Fissure Copper Veins
Development Status: Prospect
Deposit Model: 96: Native Cu
Host Rock Unit: Portage Lake Volcanics
Host Rock: Basalt

The Natick Gap Exploration (Natick Mining Company) was located approx. 1.75 mi. east of the town of Phoenix. The company formed in 1853 and exploration work began shortly after. No additional information is available concerning production; it is assumed that this location was not favourable for mining.

Mineral List


1 valid mineral.

Regional Geology

This information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This data will improve over time as more accurate maps and data sets are added.

Stenian1000 - 1200 MaPortage Lake Volcanics

Major:: {basalt},Minor:: {andesite},Incidental:: {rhyolite, mudstone}

Portage Lake Volcanics - Lava flows, mostly basalt, andesite and felsite flows and subordinate interflow sedimentary rocks.

This unit is the same as unit Yp on paper map of Sims (1992). Description is taken from that unit description.

Mesoproterozoic1000 - 1600 MaMesoproterozoic volcanic rocks

Volcanic rocks

Isle Royale

May include hypabyssal intrusions.

Mesoproterozoic1000 - 1600 MaMesoproterozoic sedimentary

Sedimentary


References for regional geology:

Data provided by Macrostrat.org

Garrity, C.P., and Soller, D.R.,. Database of the Geologic Map of North America: adapted from the map by J.C. Reed, Jr. and others (2005). U.S. Geological Survey Data Series 424 .

USGS compilers. State geologic map data. State Maps.

Geological Survey of Canada. Generalized geological map of the world and linked databases. doi:10.4095/195142. Open File 2915d.



The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Clarke, D.H., 1974, Copper Mines of Keweenaw.

JOHNSON, A.M. AND GROTH, E.H., 1998, INVENTORY OF UNDERGROUND MINES, KEWEENAW COUNTY, P. 190-91 SITE ID # 420061, MICHIGAN DEPARTMENT OF NATURAL RESOURCES.

Mineral and/or Locality  
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