Resolute Mine, Keweenaw Co., Michigan, USA
|Latitude & Longitude (WGS84):||47° 25' 45'' North , 88° 2' 8'' West|
|Latitude & Longitude (decimal):||47.4291666667, -88.0355555556|
|Other regions containing this locality:||Keweenaw Peninsula, Michigan, USA|
Commodities (Major) - Copper
Deposit Type: Fissure Copper Veins
Development Status: Past Producer
Deposit Model: 96: Native Cu
Host Rock Unit: Portage Lake Volcanics
Host Rock: Basalt
An underground copper mine consisting of one shaft located near Mandan. The Resolute Mining Company was organized in 1864 and began work on the Resolute Fissure. Little is known of this company as no mining reports or ore shipments are known to exist. In 1899, the mine was reorganized as the Resolute Copper Company and work began to de-water and stabilize the shaft which was at a depth of nearly 400 feet in depth and 2,000 feet of drifting. After this point, very little is known of the mine or its operations. Minerals to be found at the piles include copper, prehnite, and greenstones.
4 valid minerals.
Rock Types Recorded
Select Rock List TypeAlphabetical List Tree Diagram
Entries shown in red are rocks recorded for this region.
This geological map and associated 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 does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org
1000 - 1200 Ma
|Portage Lake Volcanics|
Age: Stenian (1000 - 1200 Ma)
Stratigraphic Name: Portage Lake Volcanics
Comments: This unit is the same as unit Yp on paper map of Sims (1992). Description is taken from that unit description.
Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. 
Kaminski-Hamka, T., 2011, The Copper Mines of Keweenaw County, Michigan. Copperlady Press, 150 pp.
The Copper Country Rock & Mineral Club, 2001, Red Gold and Tarnished Silver, 2nd Ed.
DeGood, L., 2011, Michigan Copper Mining Stocks and Bonds. 401 pp.