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Sheffield Corundum Mine, Macon Co., North Carolina, USAi
Regional Level Types
Sheffield Corundum MineMine
Macon Co.County
North CarolinaState
USACountry

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Key
Lock Map
Latitude & Longitude (WGS84):
35° 16' 9'' North , 83° 23' 35'' West
Latitude & Longitude (decimal):
Locality type:
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Franklin3,940 (2017)9.7km
Dillsboro240 (2017)16.9km
Webster375 (2017)17.9km
Forest Hills372 (2017)18.4km
Bryson City1,458 (2017)18.7km


PROPERTY IS OPERATED BY ROBERT T. BRYSON.
NOT ON 1980 OR 1981 MSHA LISTS
FOR ATTACHMENT SEE 37-087-00003.
Commodities (Major) - Abrasive - Corundum
Development Status: Past Producer

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


5 valid minerals.

Detailed Mineral List:

Almandine
Formula: Fe2+3Al2(SiO4)3
Reference: Corundum and the peridotites of western North Carolina By Joseph Hyde Pratt, Joseph Volney Lewis
Chalcopyrite
Formula: CuFeS2
Reference: Corundum and the peridotites of western North Carolina By Joseph Hyde Pratt, Joseph Volney Lewis
Corundum
Formula: Al2O3
Colour: pink, purple
Reference: Corundum and the peridotites of western North Carolina By Joseph Hyde Pratt, Joseph Volney Lewis
Corundum var: Ruby
Formula: Al2O3
Reference: Wilson,W.F and McKenzie,B.J (1980) Mineral Collecting Sites in North Carolina : NCGS Information Circular 24
Corundum var: Sapphire
Formula: Al2O3
Reference: Wilson,W.F and McKenzie,B.J (1980) Mineral Collecting Sites in North Carolina : NCGS Information Circular 24
Graphite
Formula: C
Reference: Corundum and the peridotites of western North Carolina By Joseph Hyde Pratt, Joseph Volney Lewis
Pyrrhotite
Formula: Fe7S8
Reference: Corundum and the peridotites of western North Carolina By Joseph Hyde Pratt, Joseph Volney Lewis

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Graphite1.CB.05aC
Group 2 - Sulphides and Sulfosalts
Chalcopyrite2.CB.10aCuFeS2
Pyrrhotite2.CC.10Fe7S8
Group 4 - Oxides and Hydroxides
Corundum4.CB.05Al2O3
var: Ruby4.CB.05Al2O3
var: Sapphire4.CB.05Al2O3
Group 9 - Silicates
Almandine9.AD.25Fe2+3Al2(SiO4)3

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
AmXp, with m:p = 1:1
Pyrrhotite2.8.10.1Fe7S8
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
Group 4 - SIMPLE OXIDES
A2X3
Corundum4.3.1.1Al2O3
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Almandine51.4.3a.2Fe2+3Al2(SiO4)3
Unclassified Minerals, Mixtures, etc.
Corundum
var: Ruby
-Al2O3
var: Sapphire-Al2O3

List of minerals for each chemical element

CCarbon
C GraphiteC
OOxygen
O CorundumAl2O3
O AlmandineFe32+Al2(SiO4)3
O Corundum (var: Ruby)Al2O3
O Corundum (var: Sapphire)Al2O3
AlAluminium
Al CorundumAl2O3
Al AlmandineFe32+Al2(SiO4)3
Al Corundum (var: Ruby)Al2O3
Al Corundum (var: Sapphire)Al2O3
SiSilicon
Si AlmandineFe32+Al2(SiO4)3
SSulfur
S PyrrhotiteFe7S8
S ChalcopyriteCuFeS2
FeIron
Fe AlmandineFe32+Al2(SiO4)3
Fe PyrrhotiteFe7S8
Fe ChalcopyriteCuFeS2
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

Neoproterozoic - Mesoproterozoic
541 - 1600 Ma



ID: 2722732
Coweeta Group; Biotite Gneiss

Age: Proterozoic (541 - 1600 Ma)

Stratigraphic Name: Coweeta Group

Description: Migmatitic; interlayered and gradational with biotite-garnet gneiss and amphibolite; locally abundant quartz and alumino-silicates. Stratigraphic position uncertain.

Comments: Original map source: The North Carolina Dept. of Environment, Health, and Natural Resources, Division of Land Resources, NC Geological Survey, in cooperation with the NC Center for Geographic Information and Analysis, 1998 (updated 2007), Geology - North Carolina (1:250,000)

Lithology: Major:{biotite gneiss,amphibolite}

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]

Mesoproterozoic
1000 - 1600 Ma



ID: 3186696
Mesoproterozoic crystalline metamorphic rocks

Age: Mesoproterozoic (1000 - 1600 Ma)

Comments: Blue Ridge

Lithology: Paragneiss; paragneiss/metavolcanic gneiss

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)
NC GEOL. SURVEY.
MSHA INSPECTORS 1978
OLSON, J.C. & OTHERS, 1946, NC GEOL SURVEY BULL 49, PLATE 2.

External Links

www.sheffieldmine.com


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