|Latitude & Longitude (WGS84):||46° 43' 29'' North , 89° 10' 36'' West|
|Latitude & Longitude (decimal):||46.72472,-89.17667|
|Köppen climate type:||Dfb : Warm-summer humid continental climate|
Commodities (Major) - Copper
Deposit Type: Fissure
Development Status: Past Producer
Deposit Model: 96: Native Cu
Host Rock Unit: Portage Lake Volcanics
Host Rock: Basalt
The Peninsula Mining Company was organized in 1850 to work a vein that crossed the property. The mine was worked previously by the Ohio Trap Rock Company between 1847 and 1849 with little success. Work by the Peninsula began in 1851 but showed little promise of copper as only 6,000 pounds of copper was produced by 1854. The mine was abandoned at this time. The property was later split up to form parts of the Minesota, National, and Creek Mines.
Regions containing this locality
|North America Plate||Tectonic Plate|
|Keweenaw Peninsula, Michigan, USA||Peninsula|
Select Mineral List TypeStandard Detailed Strunz Dana Chemical Elements
Commodity ListThis is a list of exploitable or exploited mineral commodities recorded at this locality.
1 valid mineral.
Rock Types Recorded
Select Rock List TypeAlphabetical List Tree Diagram
Detailed Mineral List:
| ⓘ Copper|
Reference: Lee A. Miller (1986) Index & Reference Guide for the Copper Mining Industry of Michigan Vol III Ontonagon County.
List of minerals arranged by Dana 8th Edition classification
|Group 1 - NATIVE ELEMENTS AND ALLOYS|
|Metals, other than the Platinum Group|
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. Original map source: Cannon, W.F., Kress, T.H., Sutphin, D.M., Morey, G.B., Meints, Joyce, and Barber-Delach, Robert, 1997, Digital Geologic Map and mineral deposits of the Lake Superior Region, Minnesota, Wisconsin, Michigan: USGS Open-File Report 97-455 (version 3, Nov. 19
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. 
1000 - 1600 Ma
|Mesoproterozoic volcanic rocks|
Age: Mesoproterozoic (1000 - 1600 Ma)
Comments: Mid-Continent Rift
Lithology: Bimodal volcanic rocks
Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529.