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Graphite mine, Portage Co., Wisconsin, USAi
Regional Level Types
Graphite mineMine
Portage Co.County
WisconsinState
USACountry

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Latitude & Longitude (WGS84): 44° 36' 28'' North , 89° 45' 58'' West
Latitude & Longitude (decimal): 44.60778,-89.76611
GeoHash:G#: dpbjv2d74
Locality type:Mine
Köppen climate type:Dfb : Warm-summer humid continental climate
Nearest Settlements:
PlacePopulationDistance
Junction City431 (2017)1.9km
Milladore275 (2017)7.0km
Sherry800 (2017)12.1km
Rudolph432 (2017)12.8km
Knowlton120 (2017)13.8km


A deposit of carbonaceous schist was worked for a poor grade of graphite in the early 1900's. The product was apparently mixed with materials mined from a ferruginous schist a few miles away to make various paints. The location given is "one mile north of Junction City on County Road G", but traces of the long-abandoned workings have been obliterated.

Regions containing this locality

North America PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


3 valid minerals.

Detailed Mineral List:

Chalcopyrite
Formula: CuFeS2
Reference: R&M 73:11-12 pp 378-399 Wisconsin Mineral Locality Index
Graphite
Formula: C
Reference: http://wgnhs.uwex.edu/minerals/graphite/
Pyrite
Formula: FeS2
Reference: http://wgnhs.uwex.edu/minerals/graphite/

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Graphite1.CB.05aC
Group 2 - Sulphides and Sulfosalts
Chalcopyrite2.CB.10aCuFeS2
Pyrite2.EB.05aFeS2

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Semi-metals and non-metals
Graphite1.3.6.2C
Group 2 - SULFIDES
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2

List of minerals for each chemical element

CCarbon
C GraphiteC
SSulfur
S ChalcopyriteCuFeS2
S PyriteFeS2
FeIron
Fe ChalcopyriteCuFeS2
Fe PyriteFeS2
CuCopper
Cu ChalcopyriteCuFeS2

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

Statherian
1600 - 1800 Ma



ID: 3184827
Paleoproterozoic volcanic rocks

Age: Statherian (1600 - 1800 Ma)

Lithology: 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]

Orosirian
1800 - 2050 Ma



ID: 2790906
Milladore Volcanic Complex

Age: Orosirian (1800 - 2050 Ma)

Stratigraphic Name: Milladore Volcanic Complex

Description: Succession of poorly exposed interlayered metavolcanic and metasedimentary rocks. Lithic units described in Sims (1990)

Comments: Marshfield terrane. Sims, P.K., 1990, Geologic map of Precambrian rocks of Eau Claire and Green Bay 1o x 2o quadrangles, central Wisconsin: U.S. Geological Survey Miscellaneous Investigations Series Map I- 1925, scale 1:250,000 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:{metasedimentary,metavolcanic}

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]

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)
Cordua, W. (1998) Minerals of Wisconsin: Rocks and Minerals: 73 (6): 378 - 399
Crowns, Byron (1976) Wisconsin through 5 billion years of change: Wisconsin Earth Science Center, 318 p.

External Links



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