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Piedmont Minerals Company Mine, Hillsborough, Orange Co., North Carolina, USA

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Key
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Latitude & Longitude (WGS84): 36° 4' 2'' North , 79° 6' 25'' West
Latitude & Longitude (decimal): 36.06740,-79.10710
GeoHash:G#: dnrtpvggy
Locality type:Mine
Köppen climate type:Cfa : Humid subtropical climate


A pyrophyllite mine.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


9 valid minerals.

Detailed Mineral List:

Alunite
Formula: KAl3(SO4)2(OH)6
Reference: Smithsonian Institution Mineral Reference Collection No. 161180-00
Andalusite
Formula: Al2(SiO4)O
Reference: Rocks & Min.: 60:93.
Cacoxenite
Formula: Fe3+24AlO6(PO4)17(OH)12 · 75H2O
Reference: www.mindat.org/mesg-11-168140.html
Lazulite
Formula: MgAl2(PO4)2(OH)2
Reference: Rocks & Min.: 60:93.
Pyrophyllite
Formula: Al2Si4O10(OH)2
Reference: Rocks & Min.: 60:93.
Strengite
Formula: FePO4 · 2H2O
Reference: www.mindat.org/mesg-11-168140.html
Topaz
Formula: Al2(SiO4)(F,OH)2
Reference: Rocks & Min.: 60:93.
Wavellite
Formula: Al3(PO4)2(OH,F)3 · 5H2O
Reference: www.mindat.org/mesg-11-168140.html
Zunyite
Formula: Al13Si5O20(OH,F)18Cl
Reference: Jason B. Smith collection.

List of minerals arranged by Strunz 10th Edition classification

Group 7 - Sulphates, Chromates, Molybdates and Tungstates
'Alunite'7.BC.10KAl3(SO4)2(OH)6
Group 8 - Phosphates, Arsenates and Vanadates
'Cacoxenite'8.DC.40Fe3+24AlO6(PO4)17(OH)12 · 75H2O
'Lazulite'8.BB.40MgAl2(PO4)2(OH)2
'Strengite'8.CD.10FePO4 · 2H2O
'Wavellite'8.DC.50Al3(PO4)2(OH,F)3 · 5H2O
Group 9 - Silicates
'Andalusite'9.AF.10Al2(SiO4)O
'Pyrophyllite'9.EC.10Al2Si4O10(OH)2
'Topaz'9.AF.35Al2(SiO4)(F,OH)2
'Zunyite'9.BJ.55Al13Si5O20(OH,F)18Cl

List of minerals arranged by Dana 8th Edition classification

Group 30 - ANHYDROUS SULFATES CONTAINING HYDROXYL OR HALOGEN
(AB)2(XO4)Zq
Alunite30.2.4.1KAl3(SO4)2(OH)6
Group 40 - HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
(AB)5(XO4)2·xH2O
Strengite40.4.1.2FePO4 · 2H2O
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
(AB)3(XO4)2Zq
Lazulite41.10.1.1MgAl2(PO4)2(OH)2
Group 42 - HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A3(XO4)2Zq·xH2O
Wavellite42.10.2.1Al3(PO4)2(OH,F)3 · 5H2O
Miscellaneous
Cacoxenite42.13.5.1Fe3+24AlO6(PO4)17(OH)12 · 75H2O
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [4] and >[4] coordination
Andalusite52.2.2b.1Al2(SiO4)O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] coordination only
Topaz52.3.1.1Al2(SiO4)(F,OH)2
Group 57 - SOROSILICATES Si3O10 Groups and Larger Noncyclic Groups
Insular Si3O10 and Larger Noncyclic Groups with [Si5O16] groups
Zunyite57.3.1.1Al13Si5O20(OH,F)18Cl
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Pyrophyllite71.2.1.1Al2Si4O10(OH)2

List of minerals for each chemical element

HHydrogen
H AluniteKAl3(SO4)2(OH)6
H CacoxeniteFe243+AlO6(PO4)17(OH)12 · 75H2O
H LazuliteMgAl2(PO4)2(OH)2
H PyrophylliteAl2Si4O10(OH)2
H StrengiteFePO4 · 2H2O
H TopazAl2(SiO4)(F,OH)2
H WavelliteAl3(PO4)2(OH,F)3 · 5H2O
H ZunyiteAl13Si5O20(OH,F)18Cl
OOxygen
O AluniteKAl3(SO4)2(OH)6
O AndalusiteAl2(SiO4)O
O CacoxeniteFe243+AlO6(PO4)17(OH)12 · 75H2O
O LazuliteMgAl2(PO4)2(OH)2
O PyrophylliteAl2Si4O10(OH)2
O StrengiteFePO4 · 2H2O
O TopazAl2(SiO4)(F,OH)2
O WavelliteAl3(PO4)2(OH,F)3 · 5H2O
O ZunyiteAl13Si5O20(OH,F)18Cl
FFluorine
F TopazAl2(SiO4)(F,OH)2
F WavelliteAl3(PO4)2(OH,F)3 · 5H2O
F ZunyiteAl13Si5O20(OH,F)18Cl
MgMagnesium
Mg LazuliteMgAl2(PO4)2(OH)2
AlAluminium
Al AluniteKAl3(SO4)2(OH)6
Al AndalusiteAl2(SiO4)O
Al CacoxeniteFe243+AlO6(PO4)17(OH)12 · 75H2O
Al LazuliteMgAl2(PO4)2(OH)2
Al PyrophylliteAl2Si4O10(OH)2
Al TopazAl2(SiO4)(F,OH)2
Al WavelliteAl3(PO4)2(OH,F)3 · 5H2O
Al ZunyiteAl13Si5O20(OH,F)18Cl
SiSilicon
Si AndalusiteAl2(SiO4)O
Si PyrophylliteAl2Si4O10(OH)2
Si TopazAl2(SiO4)(F,OH)2
Si ZunyiteAl13Si5O20(OH,F)18Cl
PPhosphorus
P CacoxeniteFe243+AlO6(PO4)17(OH)12 · 75H2O
P LazuliteMgAl2(PO4)2(OH)2
P StrengiteFePO4 · 2H2O
P WavelliteAl3(PO4)2(OH,F)3 · 5H2O
SSulfur
S AluniteKAl3(SO4)2(OH)6
ClChlorine
Cl ZunyiteAl13Si5O20(OH,F)18Cl
KPotassium
K AluniteKAl3(SO4)2(OH)6
FeIron
Fe CacoxeniteFe243+AlO6(PO4)17(OH)12 · 75H2O
Fe StrengiteFePO4 · 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

Cambrian - Neoproterozoic
485.4 - 1000 Ma



ID: 3184289
Precambrian-Phanerozoic sedimentary and volcanic rocks

Age: Neoproterozoic to Cambrian (485.4 - 1000 Ma)

Comments: Carolina Slate Belt

Lithology: Sedimentary and 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]

Cambrian - Neoproterozoic
485.4 - 1000 Ma



ID: 2913651
Phyllite and Schist

Age: Neoproterozoic to Cambrian (485.4 - 1000 Ma)

Description: Locally laminated and pyritic; includes phyllonite, sheared fine-grained metasediment, and metavolcanic rock. In Lilesville granite aureole, includes hornfels.

Comments: In the description of CZph on the printed map, there is a unit called CZph1 and it applies to the hornfels of the Lilesville granite aureole. On the digital map this unit is NOT used, only CZph. So I did NOT make a separate unit for CZph1. The digital map DOES use the unit CZbg (which is described under CZph on the printed map also), so I DID make this a separate unit. 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:{phyllite,schist}, Minor:{phyllonite}, Incidental:{metasedimentary, metavolcanic, hornfels}

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)
Rocks & Minerals (1985): 60: 93.
Smithsonian Institution Mineral Reference Collection No. 161180-00 (Alunite).

External Links

www.mindat.org/mesg-11-168140.html


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