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Silver Valley Mine (Spring Valley Mine), Silver Valley, Cid District, Carolina Slate Belt, Davidson Co., North Carolina, USAi
Regional Level Types
Silver Valley Mine (Spring Valley Mine)Mine (Inactive)
Silver ValleyValley
Cid DistrictMining District
Carolina Slate BeltBelt
Davidson Co.County
North CarolinaState
USACountry

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Key
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Latitude & Longitude (WGS84):
35° 44' 0'' North , 80° 5' 59'' West
Latitude & Longitude (decimal):
Locality type:
Mine (Inactive) - last checked 2019
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Denton1,657 (2017)11.2km
Thomasville27,061 (2017)16.7km
Southmont1,470 (2017)16.7km
Washington Park439 (2017)17.0km
Lexington19,326 (2017)17.1km


The principle metal produced here was silver with accessory lead along with minor copper and zinc.

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


18 valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Baryte
Formula: BaSO4
Reference: Former Steve Adams collection now Wayne Bowman collection, plus others.
Calcite
Formula: CaCO3
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Cerussite
Formula: PbCO3
Habit: Small prismatic crystals and small clusters, the later almost always twinned.
Colour: Usually chalky dull white on surface from weathering, translucent grey-white interior.
Description: Likely more prevalent and better specimens in active mining days. Collecting on the small remaining dumps yielding obvious but not impressive specimens.
Reference: Keith Williamson collection, former Steve Adams collection (now in Wayne Bowman collection). Also collected by R.L. Stewart and others.
Chalcocite
Formula: Cu2S
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Chalcopyrite
Formula: CuFeS2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
'Chert var: Novaculite' ?
Description: The cited reference gives a question mark after the term "novaculite". See my messageboard discussion for May 20, 2019. The rock is highly improbable to be sedimentary, hence a variety of chert - a strictly sedimentary rock term - does not fit. Rather the abundant material being referred to is almost certain to be rhyolite. The largely uniform light grey color reduces the amount of interest in it as a lapidary material, but it can and has been used for that.
Reference: Carpenter III, P. Albert (1976) Metallic Mineral Deposits of the Carolina Slate Belt, North Carolina : NCGS Bulletion 84
'Chlorite Group'
Reference: Carpenter III, P. Albert (1976) Metallic Mineral Deposits of the Carolina Slate Belt, North Carolina : NCGS Bulletion 84
Covellite
Formula: CuS
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Freibergite
Formula: Ag6[Cu4Fe2]Sb4S13-x
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Galena
Formula: PbS
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Gold
Formula: Au
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Malachite
Formula: Cu2(CO3)(OH)2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Muscovite var: Sericite
Formula: KAl2(AlSi3O10)(OH)2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
'Psilomelane'
Formula: Mn, O
Reference: Steve Adams collection, others, abundant black Mn oxide coatings
Pyrite
Formula: FeS2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Pyromorphite
Formula: Pb5(PO4)3Cl
Habit: Highly diverse. Includes tabular with basal pinacoids all the way to slender prismatic with complete pyramid faces. Some of the later had yellow equant second-generation crystals attached epitaxially to the long colorless prism - "corn on the cob"! Also "spindles", "barrels", "rice grains", and acicular spheroids.
Colour: Every color reported for the species. Shades of green of course, also water-clear colorless, beige, tan, yellow, orange, white. But of special interest is the unique carnation pink crystals. Unfortunately these appear to be due to F-centers or lattice voids and not a chromophore. So they quickly fade in the sunlight.
Description: See details under habits and colors. This is a much smaller mine than the nearby Silver Hill Mine. But this mine surpasses Silver Hill in the amazing diversity of colors and habits of the pyromorphite.
Reference: Genth,F.A.,and Kerr,W.C.,(1885)Minerals and Mineral Localities of North Carolina
Quartz
Formula: SiO2
Reference: Carpenter III, P. Albert (1976) Metallic Mineral Deposits of the Carolina Slate Belt, North Carolina : NCGS Bulletion 84
Quartz var: Milky Quartz
Formula: SiO2
Reference: Carpenter III, P. Albert (1976) Metallic Mineral Deposits of the Carolina Slate Belt, North Carolina : NCGS Bulletion 84
Siderite
Formula: FeCO3
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Silver
Formula: Ag
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Sphalerite
Formula: ZnS
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Tremolite
Formula: ☐{Ca2}{Mg5}(Si8O22)(OH)2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Gold1.AA.05Au
Silver1.AA.05Ag
Group 2 - Sulphides and Sulfosalts
Chalcocite2.BA.05Cu2S
Chalcopyrite2.CB.10aCuFeS2
Covellite2.CA.05aCuS
Freibergite2.GB.05Ag6[Cu4Fe2]Sb4S13-x
Galena2.CD.10PbS
Pyrite2.EB.05aFeS2
Sphalerite2.CB.05aZnS
Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
var: Milky Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Cerussite5.AB.15PbCO3
Malachite5.BA.10Cu2(CO3)(OH)2
Siderite5.AB.05FeCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Baryte7.AD.35BaSO4
Group 8 - Phosphates, Arsenates and Vanadates
Pyromorphite8.BN.05Pb5(PO4)3Cl
Group 9 - Silicates
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
var: Sericite9.EC.15KAl2(AlSi3O10)(OH)2
Tremolite9.DE.10☐{Ca2}{Mg5}(Si8O22)(OH)2
Unclassified Minerals, Rocks, etc.
'Chert
var: Novaculite' ?
-
'Chlorite Group'-
'Psilomelane'-Mn, O

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Gold1.1.1.1Au
Silver1.1.1.2Ag
Group 2 - SULFIDES
AmBnXp, with (m+n):p = 2:1
Chalcocite2.4.7.1Cu2S
AmXp, with m:p = 1:1
Covellite2.8.12.1CuS
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 3 - SULFOSALTS
3 <ø < 4
Freibergite3.3.6.3Ag6[Cu4Fe2]Sb4S13-x
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Cerussite14.1.3.4PbCO3
Siderite14.1.1.3FeCO3
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Malachite16a.3.1.1Cu2(CO3)(OH)2
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Baryte28.3.1.1BaSO4
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A5(XO4)3Zq
Pyromorphite41.8.4.1Pb5(PO4)3Cl
Group 66 - INOSILICATES Double-Width,Unbranched Chains,(W=2)
Amphiboles - Mg-Fe-Mn-Li subgroup
Tremolite66.1.3a.1☐{Ca2}{Mg5}(Si8O22)(OH)2
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
'Chert
var: Novaculite' ?
-
'Chlorite Group'-
Muscovite
var: Sericite
-KAl2(AlSi3O10)(OH)2
'Psilomelane'-Mn, O
Quartz
var: Milky Quartz
-SiO2

List of minerals for each chemical element

HHydrogen
H MalachiteCu2(CO3)(OH)2
H Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
H Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
H MuscoviteKAl2(AlSi3O10)(OH)2
CCarbon
C MalachiteCu2(CO3)(OH)2
C CalciteCaCO3
C SideriteFeCO3
C CerussitePbCO3
OOxygen
O PyromorphitePb5(PO4)3Cl
O MalachiteCu2(CO3)(OH)2
O Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
O CalciteCaCO3
O Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
O SideriteFeCO3
O Quartz (var: Milky Quartz)SiO2
O QuartzSiO2
O MuscoviteKAl2(AlSi3O10)(OH)2
O BaryteBaSO4
O PsilomelaneMn, O
O CerussitePbCO3
MgMagnesium
Mg Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
AlAluminium
Al Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
Al MuscoviteKAl2(AlSi3O10)(OH)2
SiSilicon
Si Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
Si Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
Si Quartz (var: Milky Quartz)SiO2
Si QuartzSiO2
Si MuscoviteKAl2(AlSi3O10)(OH)2
PPhosphorus
P PyromorphitePb5(PO4)3Cl
SSulfur
S GalenaPbS
S SphaleriteZnS
S ChalcociteCu2S
S PyriteFeS2
S FreibergiteAg6[Cu4Fe2]Sb4S13-x
S ChalcopyriteCuFeS2
S CovelliteCuS
S BaryteBaSO4
ClChlorine
Cl PyromorphitePb5(PO4)3Cl
KPotassium
K Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
K MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Ca Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
Ca CalciteCaCO3
MnManganese
Mn PsilomelaneMn, O
FeIron
Fe PyriteFeS2
Fe FreibergiteAg6[Cu4Fe2]Sb4S13-x
Fe ChalcopyriteCuFeS2
Fe SideriteFeCO3
CuCopper
Cu ChalcociteCu2S
Cu MalachiteCu2(CO3)(OH)2
Cu FreibergiteAg6[Cu4Fe2]Sb4S13-x
Cu ChalcopyriteCuFeS2
Cu CovelliteCuS
ZnZinc
Zn SphaleriteZnS
AgSilver
Ag SilverAg
Ag FreibergiteAg6[Cu4Fe2]Sb4S13-x
SbAntimony
Sb FreibergiteAg6[Cu4Fe2]Sb4S13-x
BaBarium
Ba BaryteBaSO4
AuGold
Au GoldAu
PbLead
Pb PyromorphitePb5(PO4)3Cl
Pb GalenaPbS
Pb CerussitePbCO3

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: 2959292
Cid Formation; Metamudstone and Meta-Argillite

Age: Neoproterozoic to Cambrian (485.4 - 1000 Ma)

Stratigraphic Name: Cid Formation

Description: (Southwest of Asheboro) Thin to thick bedded; bedding plane and axial-planar cleavage common; interbedded with metasandstone, metaconglomerate, and metavolcanic rock.

Comments: Unit descriptions are the same for CAZmd and CAZmd1 thru 3; differentiated only by formation names. 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:{slate,argillite}, Minor:{metasandstone,metaconglomerate,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]

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]

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: 60: 89.
CARPENTER, P. A., III, 1976, METALLIC MINERAL DEPOSITS OF THE CAROLINA SLATE BELT, NORTH CAROLINA: NORTH CAROLINA MINERAL RESOURCES SEC. BULL. 84, 166 P. 53.
PARDEE, J T & PARK, JR., C F, 1948, USGS PROF PAPER 213, P.


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