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Arnold Mine, Copper Falls, Keweenaw Co., Michigan, USAi
Regional Level Types
Arnold MineMine
Copper Falls- not defined -
Keweenaw Co.County
MichiganState
USACountry

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Key
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Latitude & Longitude (WGS84): 47° 25' 4'' North , 88° 13' 48'' West
Latitude & Longitude (decimal): 47.41787,-88.23001
GeoHash:G#: f03mb20v5
Locality type:Mine
Köppen climate type:Dfb : Warm-summer humid continental climate
Nearest Settlements:
PlacePopulationDistance
Ahmeek146 (2017)18.2km
Copper City187 (2017)19.0km
Calumet703 (2017)25.4km
Laurium1,941 (2017)25.7km
Copper Harbor108 (2017)26.3km


The Arnold Mine began exploration work on the Ashbed Amygdaloid in 1860 and incorporated in 1863 with the completion of its only shaft. The mine was worked sporadically until 1900 when all worked ceased. Approx. 2 million lbs. of refined copper was recovered.

Regions containing this locality

North America PlateTectonic Plate
Keweenaw Peninsula, Michigan, USAPeninsula

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


1 valid mineral.

Detailed Mineral List:

Natrolite
Formula: Na2Al2Si3O10 · 2H2O
Reference: Mineralogy of Michigan (2004) Heinrich & Robinson

List of minerals arranged by Strunz 10th Edition classification

Group 9 - Silicates
Natrolite9.GA.05Na2Al2Si3O10 · 2H2O

List of minerals arranged by Dana 8th Edition classification

Group 77 - TECTOSILICATES Zeolites
Zeolite group - True zeolites
Natrolite77.1.5.1Na2Al2Si3O10 · 2H2O

List of minerals for each chemical element

HHydrogen
H NatroliteNa2Al2Si3O10 · 2H2O
OOxygen
O NatroliteNa2Al2Si3O10 · 2H2O
NaSodium
Na NatroliteNa2Al2Si3O10 · 2H2O
AlAluminium
Al NatroliteNa2Al2Si3O10 · 2H2O
SiSilicon
Si NatroliteNa2Al2Si3O10 · 2H2O

Regional Geology

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

Stenian
1000 - 1200 Ma



ID: 2928161
Portage Lake Volcanics

Age: Stenian (1000 - 1200 Ma)

Stratigraphic Name: Portage Lake Volcanics

Description: Lava flows, mostly basalt, andesite and felsite flows and subordinate interflow sedimentary rocks.

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

Lithology: Major:{basalt}, Minor:{basaltic andesite}, Incidental:{rhyolite, sandstone mudstone}

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. [133]

Stenian
1000 - 1200 Ma



ID: 3184728
Mesoproterozoic volcanic rocks

Age: Stenian (1000 - 1200 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. [154]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Butler, B.S., and Burbank, W.S., 1929, The Copper Deposits of Michigan. U.S. Geological Survey. Professional Paper 144. 238 pp.


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