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Douglass Copper Mine, Blue Hill, Blue Hill - Castine Mining District, Hancock County, Maine, USAi
Regional Level Types
Douglass Copper MineMine (Backfilled)
Blue HillTown
Blue Hill - Castine Mining DistrictMining District
Hancock CountyCounty
MaineState
USACountry

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Latitude & Longitude (WGS84):
44° 23' 45'' North , 68° 37' 37'' West
Latitude & Longitude (decimal):
44.39586,-68.62721
GeoHash:
G#: drzhw650t
GRN:
N30W36
Type:
Mine (Backfilled) - last checked 2020
Deposit first discovered:
1876
KΓΆppen climate type:
Dfb : Warm-summer humid continental climate
Nearest Settlements:
PlacePopulationDistance
Blue Hill943 (2017)3.8km
Brooksville947 (2017)7.1km
Penobscot1,397 (2017)10.1km
Sedgwick1,146 (2017)10.3km
Castine1,029 (2017)13.7km
Mindat Locality ID:
29973
Long-form identifier:
mindat:1:2:29973:1
GUID (UUID V4):
d48d25b0-cf4b-4575-a2e6-f9c0fb09850b
Other/historical names associated with this locality:
Blue Hill Village


Blue Hill is a small town located on Blue Hill Bay on the Gulf of Maine. A prominent geographic feature is a small hill, called Blue Hill, that overlooks the town and the bay. The area is a small mining district that was active in 1876 into the mid-1880s, with a few small periods of revival in the latter 1910s and in the 1960s. The principal ores contained copper and manganese, but only a few ventures were economically successful.

The mineralogy of the Douglass Mine is poorly known as it was never subject to stringent scientific analysis, unlike the nearby Black Hawk Mine. Most of the mineral reports come from old literature or from discoveries on mineral specimens which were selected for their unusual associations. Rock-forming minerals such as micas and feldspars remain unreported.
The "mines" near the Douglass Mine may or may not have seen serious mines. In the 1990s, the loose surface rocks and small rock piles did not offer much evidence of activity and ore minerals were also sparse.

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


32 valid minerals. 2 erroneous literature entries.

Detailed Mineral List:

β“˜ Actinolite
Formula: ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
β“˜ Albite
Formula: Na(AlSi3O8)
β“˜ Arsenopyrite
Formula: FeAsS
β“˜ Azurite
Formula: Cu3(CO3)2(OH)2
β“˜ Calcite
Formula: CaCO3
β“˜ Chalcocite
Formula: Cu2S
β“˜ Chalcopyrite
Formula: CuFeS2
β“˜ Chrysocolla
Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
β“˜ Clinochlore
Formula: Mg5Al(AlSi3O10)(OH)8
β“˜ Copper
Formula: Cu
β“˜ Cordierite
Formula: (Mg,Fe)2Al3(AlSi5O18)
β“˜ Cuprite
Formula: Cu2O
β“˜ Fluorite
Formula: CaF2
β“˜ Gahnite
Formula: ZnAl2O4
β“˜ Galena
Formula: PbS
β“˜ Goethite
Formula: Ξ±-Fe3+O(OH)
β“˜ Gold
Formula: Au
β“˜ Graphite
Formula: C
β“˜ HΓΌbnerite
Formula: MnWO4
β“˜ Kaolinite ?
Formula: Al2(Si2O5)(OH)4
β“˜ Magnetite
Formula: Fe2+Fe3+2O4
β“˜ Malachite
Formula: Cu2(CO3)(OH)2
β“˜ Molybdenite
Formula: MoS2
β“˜ Monazite-(Ce)
Formula: Ce(PO4)
Description: Found at "East Blue Hill".
β“˜ Nickeline
Formula: NiAs
β“˜ Pentlandite
Formula: (NixFey)Ξ£9S8
β“˜ Pyrite
Formula: FeS2
β“˜ Pyrrhotite
Formula: Fe1-xS
β“˜ Quartz
Formula: SiO2
β“˜ Silver
Formula: Ag
β“˜ Sphalerite
Formula: ZnS
β“˜ Stibnite
Formula: Sb2S3
β“˜ 'Tennantite Subgroup'
Formula: Cu6(Cu4C2+2)As4S12S
β“˜ 'Tetrahedrite Subgroup'
Formula: Cu6(Cu4C2+2)Sb4S12S
β“˜ Tremolite
Formula: ◻Ca2Mg5(Si8O22)(OH)2
β“˜ Zircon
Formula: Zr(SiO4)

Gallery:

FeS2β“˜ Pyrite

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
β“˜Copper1.AA.05Cu
β“˜Silver1.AA.05Ag
β“˜Gold1.AA.05Au
β“˜Graphite1.CB.05aC
Group 2 - Sulphides and Sulfosalts
β“˜Chalcocite2.BA.05Cu2S
β“˜Pentlandite2.BB.15(NixFey)Ξ£9S8
β“˜Sphalerite2.CB.05aZnS
β“˜Chalcopyrite2.CB.10aCuFeS2
β“˜Nickeline ?2.CC.05NiAs
β“˜Pyrrhotite2.CC.10Fe1-xS
β“˜Galena2.CD.10PbS
β“˜Stibnite2.DB.05Sb2S3
β“˜Molybdenite2.EA.30MoS2
β“˜Pyrite2.EB.05aFeS2
β“˜Arsenopyrite2.EB.20FeAsS
β“˜'Tennantite Subgroup'2.GB.05Cu6(Cu4C2+2)As4S12S
β“˜'Tetrahedrite Subgroup'2.GB.05Cu6(Cu4C2+2)Sb4S12S
Group 3 - Halides
β“˜Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
β“˜Goethite4.00.Ξ±-Fe3+O(OH)
β“˜Cuprite4.AA.10Cu2O
β“˜Gahnite4.BB.05ZnAl2O4
β“˜Magnetite4.BB.05Fe2+Fe3+2O4
β“˜Quartz4.DA.05SiO2
β“˜HΓΌbnerite ?4.DB.30MnWO4
Group 5 - Nitrates and Carbonates
β“˜Calcite5.AB.05CaCO3
β“˜Azurite5.BA.05Cu3(CO3)2(OH)2
β“˜Malachite5.BA.10Cu2(CO3)(OH)2
Group 8 - Phosphates, Arsenates and Vanadates
β“˜Monazite-(Ce)8.AD.50Ce(PO4)
Group 9 - Silicates
β“˜Zircon9.AD.30Zr(SiO4)
β“˜Cordierite9.CJ.10(Mg,Fe)2Al3(AlSi5O18)
β“˜Tremolite9.DE.10β—»Ca2Mg5(Si8O22)(OH)2
β“˜Actinolite9.DE.10β—»Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
β“˜Clinochlore9.EC.55Mg5Al(AlSi3O10)(OH)8
β“˜Kaolinite ?9.ED.05Al2(Si2O5)(OH)4
β“˜Chrysocolla9.ED.20Cu2-xAlx(H2-xSi2O5)(OH)4 Β· nH2O, x < 1
β“˜Albite9.FA.35Na(AlSi3O8)

List of minerals for each chemical element

HHydrogen
Hβ“˜ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Hβ“˜ AzuriteCu3(CO3)2(OH)2
Hβ“˜ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Hβ“˜ ClinochloreMg5Al(AlSi3O10)(OH)8
Hβ“˜ GoethiteΞ±-Fe3+O(OH)
Hβ“˜ KaoliniteAl2(Si2O5)(OH)4
Hβ“˜ MalachiteCu2(CO3)(OH)2
Hβ“˜ Tremolite◻Ca2Mg5(Si8O22)(OH)2
CCarbon
Cβ“˜ AzuriteCu3(CO3)2(OH)2
Cβ“˜ CalciteCaCO3
Cβ“˜ GraphiteC
Cβ“˜ MalachiteCu2(CO3)(OH)2
OOxygen
Oβ“˜ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Oβ“˜ AlbiteNa(AlSi3O8)
Oβ“˜ AzuriteCu3(CO3)2(OH)2
Oβ“˜ CalciteCaCO3
Oβ“˜ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Oβ“˜ ClinochloreMg5Al(AlSi3O10)(OH)8
Oβ“˜ Cordierite(Mg,Fe)2Al3(AlSi5O18)
Oβ“˜ CupriteCu2O
Oβ“˜ GahniteZnAl2O4
Oβ“˜ GoethiteΞ±-Fe3+O(OH)
Oβ“˜ HΓΌbneriteMnWO4
Oβ“˜ KaoliniteAl2(Si2O5)(OH)4
Oβ“˜ MagnetiteFe2+Fe23+O4
Oβ“˜ MalachiteCu2(CO3)(OH)2
Oβ“˜ Monazite-(Ce)Ce(PO4)
Oβ“˜ QuartzSiO2
Oβ“˜ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Oβ“˜ ZirconZr(SiO4)
FFluorine
Fβ“˜ FluoriteCaF2
NaSodium
Naβ“˜ AlbiteNa(AlSi3O8)
MgMagnesium
Mgβ“˜ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Mgβ“˜ ClinochloreMg5Al(AlSi3O10)(OH)8
Mgβ“˜ Cordierite(Mg,Fe)2Al3(AlSi5O18)
Mgβ“˜ Tremolite◻Ca2Mg5(Si8O22)(OH)2
AlAluminium
Alβ“˜ AlbiteNa(AlSi3O8)
Alβ“˜ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Alβ“˜ ClinochloreMg5Al(AlSi3O10)(OH)8
Alβ“˜ Cordierite(Mg,Fe)2Al3(AlSi5O18)
Alβ“˜ GahniteZnAl2O4
Alβ“˜ KaoliniteAl2(Si2O5)(OH)4
SiSilicon
Siβ“˜ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Siβ“˜ AlbiteNa(AlSi3O8)
Siβ“˜ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Siβ“˜ ClinochloreMg5Al(AlSi3O10)(OH)8
Siβ“˜ Cordierite(Mg,Fe)2Al3(AlSi5O18)
Siβ“˜ KaoliniteAl2(Si2O5)(OH)4
Siβ“˜ QuartzSiO2
Siβ“˜ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Siβ“˜ ZirconZr(SiO4)
PPhosphorus
Pβ“˜ Monazite-(Ce)Ce(PO4)
SSulfur
Sβ“˜ ArsenopyriteFeAsS
Sβ“˜ ChalcopyriteCuFeS2
Sβ“˜ ChalcociteCu2S
Sβ“˜ GalenaPbS
Sβ“˜ MolybdeniteMoS2
Sβ“˜ Pentlandite(NixFey)Ξ£9S8
Sβ“˜ PyriteFeS2
Sβ“˜ PyrrhotiteFe1-xS
Sβ“˜ SphaleriteZnS
Sβ“˜ StibniteSb2S3
Sβ“˜ Tennantite SubgroupCu6(Cu4C22+)As4S12S
Sβ“˜ Tetrahedrite SubgroupCu6(Cu4C22+)Sb4S12S
CaCalcium
Caβ“˜ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Caβ“˜ CalciteCaCO3
Caβ“˜ FluoriteCaF2
Caβ“˜ Tremolite◻Ca2Mg5(Si8O22)(OH)2
MnManganese
Mnβ“˜ HΓΌbneriteMnWO4
FeIron
Feβ“˜ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Feβ“˜ ArsenopyriteFeAsS
Feβ“˜ ChalcopyriteCuFeS2
Feβ“˜ Cordierite(Mg,Fe)2Al3(AlSi5O18)
Feβ“˜ GoethiteΞ±-Fe3+O(OH)
Feβ“˜ MagnetiteFe2+Fe23+O4
Feβ“˜ Pentlandite(NixFey)Ξ£9S8
Feβ“˜ PyriteFeS2
Feβ“˜ PyrrhotiteFe1-xS
NiNickel
Niβ“˜ NickelineNiAs
Niβ“˜ Pentlandite(NixFey)Ξ£9S8
CuCopper
Cuβ“˜ AzuriteCu3(CO3)2(OH)2
Cuβ“˜ ChalcopyriteCuFeS2
Cuβ“˜ ChalcociteCu2S
Cuβ“˜ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Cuβ“˜ CupriteCu2O
Cuβ“˜ CopperCu
Cuβ“˜ MalachiteCu2(CO3)(OH)2
Cuβ“˜ Tennantite SubgroupCu6(Cu4C22+)As4S12S
Cuβ“˜ Tetrahedrite SubgroupCu6(Cu4C22+)Sb4S12S
ZnZinc
Znβ“˜ GahniteZnAl2O4
Znβ“˜ SphaleriteZnS
AsArsenic
Asβ“˜ ArsenopyriteFeAsS
Asβ“˜ NickelineNiAs
Asβ“˜ Tennantite SubgroupCu6(Cu4C22+)As4S12S
ZrZirconium
Zrβ“˜ ZirconZr(SiO4)
MoMolybdenum
Moβ“˜ MolybdeniteMoS2
AgSilver
Agβ“˜ SilverAg
SbAntimony
Sbβ“˜ StibniteSb2S3
Sbβ“˜ Tetrahedrite SubgroupCu6(Cu4C22+)Sb4S12S
CeCerium
Ceβ“˜ Monazite-(Ce)Ce(PO4)
WTungsten
Wβ“˜ HΓΌbneriteMnWO4
AuGold
Auβ“˜ GoldAu
PbLead
Pbβ“˜ GalenaPbS

Other Regions, Features and Areas containing this locality

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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

www.pnas.org (n.d.) http://www.pnas.org/content/11/1/1.full.pdf
US Board on Geographic Names (n.d.) https://geonames.usgs.gov/apex/f?p=138:3:10954953481409::NO:3:P3_FID,P3_TITLE:562592,Blue%20Hill
Emmons, William H. (1910) Some ore deposits in Maine and the Milan mine, New Hampshire. Bulletin Vol. 432. US Geological Survey doi:10.3133/b432
Lindgren, W. (1925) The Cordierite-Anthophyllite Mineralization at Blue Hill, Maine, and Its Relation to Similar Occurrences. Proceedings of the National Academy of Sciences of the United States of America: 11(1): 1-4.
Anderson (1991), Maine Mineral Localities, 2nd edition.
King, Vandall T., Foord, Eugene E. (1994) Mineralogy of Maine Vol. 1 - Descriptive mineralogy. Maine Geological Survey.
King, Vandall T. (2000) Mineralogy of Maine Vol. 2 - Mining History, Gems, and Geology. Maine Geological Survey.pp.216-228
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