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Middle Tennessee Mining District, DeKalb Co., Tennessee, USAi
Regional Level Types
Middle Tennessee Mining DistrictMining District
DeKalb Co.County
TennesseeState
USACountry

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Key
Latitude & Longitude (WGS84):
35° North , 85° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~24km
Locality type:
Köppen climate type:


A baryte mining district spread across several Tennessee Counties (DeKalb, Smith, Wilson, Rutherford, Cannon, Williamson, Trousdale, and Putnam Counties). NOTE: This district is spread across so many counties that the detailed geological description is limited to this file for the district as a whole. Individual mines are listed under the district in their respective counties.

Veins containing barite are widely distributed in the limestones of Ordovician age that crop out on a structural arch in middle Tennessee. The arch trends NE and is about 100 miles long and 50 miles wide. Most of the veins are in the Carters limestone, but some veins also are in the overlying and underlying limy rocks. The limestones are locally sandy, shaly, or dolomitic. Most of the deposits are within 20 miles of the junction of DeKalb, Smith, and Wilson Counties, but others are in Rutherford, Cannon, Williamson, Trousdale, and Putnam Counties.

The veins occur along northeast-trending faults that generally are not persistent along strike and have a throw of not more than a few tens of feet. The faults are nearly vertical. A few have been traced about 3 miles, but most are much shorter. The displacement is mostly horizontal, or nearly so. The faults are marked by polished walls, zones of breccia 5 to 6 feet wide, and greatly fractured zones as much as 20 feet wide. The mineralized parts of the faults are generally less tna 3 feet wide. Faults trending NW are not mineralized and are considered to postdate the mineralized northeast-trending faults.

The vein minerals generally cement fault-breccia and fractured zones, although some filling of fissures and replacement of limestone fragments has occurred. The veins pinch and swell within short distances both laterally and vertically. Veins 2 feet (60 cm) wide pinch to 2 inches (5 cm) with about 12 feet (3.5 meters), and then widen again within the same distance. The contacts of the veins with the walls are sharp. Replacement of the limestone has been confined to fragments in the fault zones. Deep alteration of the wall rocks apparently did not occur, and no lateral extensions of the veins as blanket veins or bedded replacement deposits have been reported.

Banding parallel to the walls of the veins and concentric bands around fragments in the breccia are common. These bands, as many as a dozen over a distance of a few inches, are locally asymmetrical.

The upper parts of the veins are considerably weathered. Calcite and limestone fragments have been leached, leaving a porous mass of barite and fluorite containing molds of the dissolved fragments. Calamine and limonite occur as alteration products. The ultimate result of weathering is soil with lumps of white porous barite and limonite.

Regions containing this locality

North America PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


11 valid minerals.

Detailed Mineral List:

Baryte
Formula: BaSO4
Reference: Brobst, D.A. (1958), Barite Resources of the United States, USGS Bull. 1072-B: 92.
'Calamine'
Reference: Brobst, D.A. (1958), Barite Resources of the United States, USGS Bull. 1072-B: 92.
Calcite
Formula: CaCO3
Reference: Brobst, D.A. (1958), Barite Resources of the United States, USGS Bull. 1072-B: 92.
Celestine
Formula: SrSO4
Reference: Gems and Minerals of America-Jay Ellis Ransom-1974
Chalcopyrite
Formula: CuFeS2
Reference: Brobst, D.A. (1958), Barite Resources of the United States, USGS Bull. 1072-B: 92.
Dolomite
Formula: CaMg(CO3)2
Reference: Brobst, D.A. (1958), Barite Resources of the United States, USGS Bull. 1072-B: 92.
Fluorite
Formula: CaF2
Reference: Brobst, D.A. (1958), Barite Resources of the United States, USGS Bull. 1072-B: 92.
Galena
Formula: PbS
Reference: Brobst, D.A. (1958), Barite Resources of the United States, USGS Bull. 1072-B: 92.
Goethite
Formula: α-Fe3+O(OH)
Reference: Gems and Minerals of America-Jay Ellis Ransom-1974
'Limonite'
Formula: (Fe,O,OH,H2O)
Reference: Brobst, D.A. (1958), Barite Resources of the United States, USGS Bull. 1072-B: 92.
Pyrite
Formula: FeS2
Reference: Brobst, D.A. (1958), Barite Resources of the United States, USGS Bull. 1072-B: 92.
Quartz
Formula: SiO2
Reference: Brobst, D.A. (1958), Barite Resources of the United States, USGS Bull. 1072-B: 92.
Sphalerite
Formula: ZnS
Reference: Brobst, D.A. (1958), Barite Resources of the United States, USGS Bull. 1072-B: 92.

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Chalcopyrite2.CB.10aCuFeS2
Galena2.CD.10PbS
Pyrite2.EB.05aFeS2
Sphalerite2.CB.05aZnS
Group 3 - Halides
Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
Goethite4.00.α-Fe3+O(OH)
Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Dolomite5.AB.10CaMg(CO3)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Baryte7.AD.35BaSO4
Celestine7.AD.35SrSO4
Unclassified Minerals, Rocks, etc.
'Calamine'-
'Limonite'-(Fe,O,OH,H2O)

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Goethite6.1.1.2α-Fe3+O(OH)
Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
AB(XO3)2
Dolomite14.2.1.1CaMg(CO3)2
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Baryte28.3.1.1BaSO4
Celestine28.3.1.2SrSO4
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
'Calamine'-
'Limonite'-(Fe,O,OH,H2O)

List of minerals for each chemical element

HHydrogen
H Limonite(Fe,O,OH,H2O)
H Goethiteα-Fe3+O(OH)
CCarbon
C CalciteCaCO3
C DolomiteCaMg(CO3)2
OOxygen
O BaryteBaSO4
O CalciteCaCO3
O QuartzSiO2
O DolomiteCaMg(CO3)2
O Limonite(Fe,O,OH,H2O)
O Goethiteα-Fe3+O(OH)
O CelestineSrSO4
FFluorine
F FluoriteCaF2
MgMagnesium
Mg DolomiteCaMg(CO3)2
SiSilicon
Si QuartzSiO2
SSulfur
S BaryteBaSO4
S GalenaPbS
S SphaleriteZnS
S PyriteFeS2
S ChalcopyriteCuFeS2
S CelestineSrSO4
CaCalcium
Ca FluoriteCaF2
Ca CalciteCaCO3
Ca DolomiteCaMg(CO3)2
FeIron
Fe PyriteFeS2
Fe ChalcopyriteCuFeS2
Fe Limonite(Fe,O,OH,H2O)
Fe Goethiteα-Fe3+O(OH)
CuCopper
Cu ChalcopyriteCuFeS2
ZnZinc
Zn SphaleriteZnS
SrStrontium
Sr CelestineSrSO4
BaBarium
Ba BaryteBaSO4
PbLead
Pb GalenaPbS

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Brobst, D.A. (1958), Barite Resources of the United States, USGS Bulletin 1072-B: 91-92.
Jewell (1947).


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