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John Black Magnetite Mine (Helton Knob Mine), Poison Branch Belt of Deposits, Ashe County, North Carolina, USAi
Regional Level Types
John Black Magnetite Mine (Helton Knob Mine)Mine
Poison Branch Belt of DepositsGroup of Deposits
Ashe CountyCounty
North CarolinaState
USACountry

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Latitude & Longitude (WGS84):
36° 32' 51'' North , 81° 24' 22'' West
Latitude & Longitude (decimal):
36.54750,-81.40611
GeoHash:
G#: dnqpgt3bs
GRN:
N25W47
Type:
Mine
KΓΆppen climate type:
Cfb : Temperate oceanic climate
Nearest Settlements:
PlacePopulationDistance
Lansing155 (2017)10.8km
Jefferson1,606 (2017)15.4km
Trout Dale178 (2011)17.4km
West Jefferson1,308 (2017)17.8km
Independence927 (2017)24.1km
Mindat Locality ID:
99867
Long-form identifier:
mindat:1:2:99867:4
GUID (UUID V4):
8bfe7a47-ff1b-402b-be45-8d7b3f1cda25


REF:Deposit:: BRYANT, B., AND REED, J. C., JR., 1966, MINERAL RESOURCES OF THE GRANDFATHER MOUNTAIN WINDOW AND VICINITY: U.S. GEOL. SURVEY CIRC. 521, 13 P.
Deposit:: STUCKEY, J. L., 1965, NORTH CAROLINA: ITS GEOLOGY AND MINERAL RESOURCES: RALEIGH, N. C., NO
Deposit:: BAYLEY, W.S., TENN DIV OF GEOL BULL 29, 1923, P. 140.
Deposit:: CRIB LIST 12/81
Commodities (Major) - Iron
Development Status: Past Producer
Structure: Northeast
Host Rock: Gneiss, Porphyry, Pegmatite
Tectonic Structure: Blue Ridge

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

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


Mineral List


3 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
β“˜Magnetite4.BB.05Fe2+Fe3+2O4
β“˜Hematite4.CB.05Fe2O3
Group 9 - Silicates
β“˜Epidote9.BG.05a(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Unclassified
β“˜'Hornblende Root Name Group'-β—»Ca2(Z2+4Z3+)(AlSi7O22)(OH,F,Cl)2

List of minerals for each chemical element

HHydrogen
Hβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Hβ“˜ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
OOxygen
Oβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Oβ“˜ HematiteFe2O3
Oβ“˜ MagnetiteFe2+Fe23+O4
Oβ“˜ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
FFluorine
Fβ“˜ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
AlAluminium
Alβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Alβ“˜ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
SiSilicon
Siβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Siβ“˜ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
ClChlorine
Clβ“˜ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
CaCalcium
Caβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Caβ“˜ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
FeIron
Feβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Feβ“˜ HematiteFe2O3
Feβ“˜ MagnetiteFe2+Fe23+O4

Other Regions, Features and Areas containing this locality

North America PlateTectonic Plate
USA

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