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Patapsco Mine (Finksburg Mine; Orchard Mine), Patapsco Mines, Finksburg, Carroll County, Maryland, USAi
Regional Level Types
Patapsco Mine (Finksburg Mine; Orchard Mine)Mine (Abandoned)
Patapsco MinesGroup of Mines
Finksburg- not defined -
Carroll CountyCounty
MarylandState
USACountry

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Latitude & Longitude (WGS84):
39° 29' 21'' North , 76° 52' 38'' West
Latitude & Longitude (decimal):
39.48944,-76.87750
GeoHash:
G#: dr12dsgd8
GRN:
N27W43
Type:
Mine (Abandoned) - last checked 2022
KΓΆppen climate type:
Cfa : Humid subtropical climate
Nearest Settlements:
PlacePopulationDistance
Reisterstown25,968 (2015)4.5km
Pleasant Grove353 (2011)9.1km
Eldersburg30,531 (2011)11.4km
Owings Mills30,622 (2011)11.4km
Hampstead6,359 (2017)13.0km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Baltimore Mineral SocietyBaltimore, Maryland32km
Chesapeake Gem & Mineral SocietyBaltimore, Maryland32km
Gem Cutters Guild of Baltimore, Inc.Baltimore, Maryland32km
Central Maryland Rock and Mineral Collectors ExchangeElkridge, Maryland34km
Mason-Dixon Rock, Mineral, Gemological, & Lapidary ClubHanover, Pennsylvania36km
Mindat Locality ID:
3818
Long-form identifier:
mindat:1:2:3818:1
GUID (UUID V4):
370ab552-f048-42a7-9cc8-aa782645b3fb


An Fe-Cu occurrence/mine started about 1850. Located on the East end of Finksburg. Ore is in a silvery schist. Workings include a depth of about 365 feet (120 meters)[the South Mine was only about 100 feet deep to the first level] with 2 mine levels at 100 & 160 feet, each about 200 yards (190 meters) long.

The map marker for this pit was called the Orchard Mine in Heyl and Pearre (1965). Note, the road to the south of the mine may have bowed to avoid any potential collapse feature.

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


16 valid minerals. 1 (TL) - type locality of valid minerals. 1 (FRL) - first recorded locality of unapproved mineral/variety/etc.

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

Detailed Mineral List:

β“˜ Actinolite
Formula: ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
β“˜ 'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
β“˜ Bornite
Formula: Cu5FeS4
β“˜ Carrollite (TL)
Formula: CuCo2S4
Type Locality:
β“˜ Chalcocite
Formula: Cu2S
β“˜ Chalcopyrite
Formula: CuFeS2
β“˜ Chromite
Formula: Fe2+Cr3+2O4
β“˜ Chrysocolla
Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
β“˜ Covellite
Formula: CuS
β“˜ Epidote
Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
References:
Stuart Herring
β“˜ Gahnite
Formula: ZnAl2O4
β“˜ Hematite
Formula: Fe2O3
β“˜ 'Hornblende Root Name Group'
Formula: ◻Ca2(Z2+4Z3+)(AlSi7O22)(OH,F,Cl)2
β“˜ Linnaeite
Formula: Co2+Co3+2S4
References:
Dana 7:I:264.
β“˜ Magnetite
Formula: Fe2+Fe3+2O4
References:
Dana 7:I:264.
β“˜ Malachite
Formula: Cu2(CO3)(OH)2
β“˜ Quartz
Formula: SiO2
β“˜ 'Remingtonite' (FRL)
Type Locality:
β“˜ Sphalerite
Formula: ZnS

Gallery:

CuCo2S4β“˜ Carrollite (TL)

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
β“˜Chalcocite2.BA.05Cu2S
β“˜Bornite2.BA.15Cu5FeS4
β“˜Covellite2.CA.05aCuS
β“˜Sphalerite2.CB.05aZnS
β“˜Chalcopyrite2.CB.10aCuFeS2
β“˜Carrollite (TL)2.DA.05CuCo2S4
β“˜Linnaeite2.DA.05Co2+Co3+2S4
Group 4 - Oxides and Hydroxides
β“˜Chromite4.BB.05Fe2+Cr3+2O4
β“˜Gahnite4.BB.05ZnAl2O4
β“˜Magnetite4.BB.05Fe2+Fe3+2O4
β“˜Hematite4.CB.05Fe2O3
β“˜Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
β“˜Malachite5.BA.10Cu2(CO3)(OH)2
Group 9 - Silicates
β“˜Epidote9.BG.05a(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
β“˜Actinolite9.DE.10β—»Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
β“˜Chrysocolla9.ED.20Cu2-xAlx(H2-xSi2O5)(OH)4 Β· nH2O, x < 1
Unclassified
β“˜'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
β“˜'Hornblende Root Name Group'-β—»Ca2(Z2+4Z3+)(AlSi7O22)(OH,F,Cl)2
β“˜'Remingtonite' (TL)-

List of minerals for each chemical element

HHydrogen
Hβ“˜ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Hβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Hβ“˜ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Hβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Hβ“˜ MalachiteCu2(CO3)(OH)2
Hβ“˜ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
CCarbon
Cβ“˜ MalachiteCu2(CO3)(OH)2
OOxygen
Oβ“˜ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Oβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Oβ“˜ ChromiteFe2+Cr23+O4
Oβ“˜ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Oβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Oβ“˜ GahniteZnAl2O4
Oβ“˜ HematiteFe2O3
Oβ“˜ MagnetiteFe2+Fe23+O4
Oβ“˜ MalachiteCu2(CO3)(OH)2
Oβ“˜ QuartzSiO2
Oβ“˜ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
FFluorine
Fβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Fβ“˜ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
MgMagnesium
Mgβ“˜ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Mgβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
AlAluminium
Alβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Alβ“˜ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Alβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Alβ“˜ GahniteZnAl2O4
Alβ“˜ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
SiSilicon
Siβ“˜ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Siβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Siβ“˜ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Siβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Siβ“˜ QuartzSiO2
Siβ“˜ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
SSulfur
Sβ“˜ BorniteCu5FeS4
Sβ“˜ CarrolliteCuCo2S4
Sβ“˜ ChalcopyriteCuFeS2
Sβ“˜ ChalcociteCu2S
Sβ“˜ CovelliteCuS
Sβ“˜ LinnaeiteCo2+Co23+S4
Sβ“˜ SphaleriteZnS
ClChlorine
Clβ“˜ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
KPotassium
Kβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
CaCalcium
Caβ“˜ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Caβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Caβ“˜ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
TiTitanium
Tiβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
CrChromium
Crβ“˜ ChromiteFe2+Cr23+O4
FeIron
Feβ“˜ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Feβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Feβ“˜ BorniteCu5FeS4
Feβ“˜ ChalcopyriteCuFeS2
Feβ“˜ ChromiteFe2+Cr23+O4
Feβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Feβ“˜ HematiteFe2O3
Feβ“˜ MagnetiteFe2+Fe23+O4
CoCobalt
Coβ“˜ CarrolliteCuCo2S4
Coβ“˜ LinnaeiteCo2+Co23+S4
CuCopper
Cuβ“˜ BorniteCu5FeS4
Cuβ“˜ CarrolliteCuCo2S4
Cuβ“˜ ChalcopyriteCuFeS2
Cuβ“˜ ChalcociteCu2S
Cuβ“˜ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Cuβ“˜ CovelliteCuS
Cuβ“˜ MalachiteCu2(CO3)(OH)2
ZnZinc
Znβ“˜ GahniteZnAl2O4
Znβ“˜ SphaleriteZnS

Other Databases

Link to USGS MRDS:10083914
Link to USGS MRDS:10105495
Link to USGS MRDS:10145484

Other Regions, Features and Areas containing this locality

North America PlateTectonic Plate

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

USGS MRDS ID #W000713 & W100759.
Faber, W.L. (1852) On Carrollite, a new Cobalt Mineral, American Journal of Science, second series, 13, 418-419.
Singewald, J. T. (1911) Report on the iron ores of Maryland: Maryland Geological Survey Volume 9, Part 3: 183.
Singewald, J. T. (1928) Notes on feldspar, quartz, chrome and manganese in Maryland: Maryland Geological Survey volume 12, part 2: 91-194.
Ulke, Titus (1935) Minerals of the District of Columbia and vicinity with a pertinent bibliography- conclusion Part 2), Rocks and Minerals: 11(2): 26-28.
Ulke, Titus (1936) Sites of minerals, mines and quarries found within a 50 mile radius of Washington, D. C., Rocks and Minerals: 11(8): 120-122.
Ostrander, C. W. and W. E. Price (1940) Minerals of Maryland: Natural History Society of Maryland , 92 pages.
Singewald, J. T. (1946) Mineral resources of Carroll and Frederick Counties: Maryland Dept. of Geology, Mines and Water Resources: Carroll and Fredrick Counties Report: 11-131.
Palache, Charles, Berman, Harry, Frondel, Clifford (1951) The System of Mineralogy (7th ed.) Vol. 2 - Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Ect. John Wiley and Sons, New York.
Heyl, Alan and Pearre, N (1965) Copper, zinc, lead, iron cobalt and barite deposits of the Piedmont Upland in Maryland: Maryland Geological Survey: Bulletin 28, 72 pages.
Kuff, K. (1981) Mineral resources map of the Finksburg and Sykesville Quadrangles, Maryland: 1:24,000.
Candela, Philip A., Wylie, A. G., Burke, T. M. (1989) Genesis of the ultramafic rock-associated Fe-Cu-Co-Zn-Ni deposits of the Sykesville District, Maryland Piedmont. Economic Geology, 84 (3) 663-675 doi:10.2113/gsecongeo.84.3.663
Muller, P. D. (1994) Finksburg Geological Quadrangle Map 1:24,000: Maryland Geological Survey.
U.S. Bureau of Mines (1995), Minerals Availability System/Mineral Industry Location System (MAS/MILS), U.S. Bureau of Mines, file ID #0240130005.
Johnsson, Johnny (1998) The history of the Patapsco Copper Mine, Maryland and the discovery of carrollite, Matrix: 6(2): 43-55.
(2005) Mineral Resources Data System (MRDS), US Geological Survey.
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