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Ore Hill Mine, Warren, Grafton County, New Hampshire, USAi
Regional Level Types
Ore Hill MineMine
WarrenTownship
Grafton CountyCounty
New HampshireState
USACountry

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Latitude & Longitude (WGS84):
43° North , 71° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~9km
GRN:
N30W38
Type:
Mine
KΓΆppen climate type:
Dfb : Warm-summer humid continental climate
Mindat Locality ID:
6134
Long-form identifier:
mindat:1:2:6134:9
GUID (UUID V4):
fda5fa06-7ddb-4c36-a63c-bb2627313d28
Other/historical names associated with this locality:
Warren Silver-Lead Mine; Warren Zinc Mine


Massive sulfide deposit, discovered by True Merrill, the landowner, in 1834. The deposit was mined intermittently until ca. 1915 for lead, copper, zinc and silver. The major period of mining was from 1889-1893 when the mine was operated by the Warren Zinc Company.

This site is located within the White Mountain National Forest, and the U.S. Forest Service has undertaken a reclamation project on the main dumps, which have been graded, loamed and seeded in order to try to slow down the leaching of metals into the small stream which passes along the foot of the dumps. Digging to collect is no longer allowed on these dumps.

Secord and Brown (1986) reported: "Examination of the unique lithologies of the Ammonoosuc Volcanics at the Ore Hill mine (i.e., a basal, pillowed, epidotized amphibolite, a cordierite-kyanite footwall schist, a muscovite schist host rock, and a tremolite-phlogopite cap rock) suggests that the sequence represents a deformed and metamorphosed alteration zone associated with sea-floor precipitation of massive ore. The essentially stratiform and strata-bound nature of the Zn-Pb-Cu orebody suggests syngenetic massive sulfide genesis. Based on mining records, a reverse ore zonation is documented, in which chalcopyrite appears to be concentrated in the upper sections of the orebody, and sphalerite and galena increase toward the base. Evidence is presented, however, to support a lateral as opposed to a vertical metallic zonation scheme. Major element trends, associated with alteration in footwall mafic metavolcanic rocks (SiO2, FeO, MgO, Na2O, and K2O depletions), suggest sea-floor metasomatism of the local mine sequence..."

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


21 valid minerals.

Detailed Mineral List:

β“˜ Anthophyllite
Formula: ◻{Mg2}{Mg5}(Si8O22)(OH)2
β“˜ 'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
β“˜ 'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
β“˜ Bornite ?
Formula: Cu5FeS4
β“˜ Chalcopyrite
Formula: CuFeS2
β“˜ 'Chlorite Group'
β“˜ Cordierite
Formula: (Mg,Fe)2Al3(AlSi5O18)
β“˜ Epidote
Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
β“˜ Galena
Formula: PbS
β“˜ 'Garnet Group'
Formula: X3Z2(SiO4)3
β“˜ Hematite
Formula: Fe2O3
β“˜ 'Hornblende Root Name Group'
Formula: ◻Ca2(Z2+4Z3+)(AlSi7O22)(OH,F,Cl)2
β“˜ Kyanite
Formula: Al2(SiO4)O
β“˜ 'Limonite'
β“˜ Malachite
Formula: Cu2(CO3)(OH)2
β“˜ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
β“˜ Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
β“˜ Pyrite
Formula: FeS2
β“˜ Pyrrhotite
Formula: Fe1-xS
β“˜ Quartz
Formula: SiO2
β“˜ Rutile
Formula: TiO2
β“˜ Spessartine
Formula: Mn2+3Al2(SiO4)3
β“˜ Sphalerite
Formula: ZnS
β“˜ Talc
Formula: Mg3Si4O10(OH)2
β“˜ Tremolite
Formula: ◻Ca2Mg5(Si8O22)(OH)2
β“˜ Vesuvianite
Formula: Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9
β“˜ Zoisite
Formula: (CaCa)(AlAlAl)O[Si2O7][SiO4](OH)

Gallery:

◻Ca2Mg5(Si8O22)(OH)2β“˜ Tremolite

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
β“˜Bornite ?2.BA.15Cu5FeS4
β“˜Sphalerite2.CB.05aZnS
β“˜Chalcopyrite2.CB.10aCuFeS2
β“˜Pyrrhotite2.CC.10Fe1-xS
β“˜Galena2.CD.10PbS
β“˜Pyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
β“˜Hematite4.CB.05Fe2O3
β“˜Quartz4.DA.05SiO2
β“˜Rutile4.DB.05TiO2
Group 5 - Nitrates and Carbonates
β“˜Malachite5.BA.10Cu2(CO3)(OH)2
Group 9 - Silicates
β“˜Spessartine9.AD.25Mn2+3Al2(SiO4)3
β“˜Kyanite9.AF.15Al2(SiO4)O
β“˜Epidote9.BG.05a(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
β“˜Zoisite9.BG.10(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
β“˜Vesuvianite9.BG.35Ca19Fe3+Al4(Al6Mg2)(β—»4)β—»[Si2O7]4[(SiO4)10]O(OH)9
β“˜Cordierite9.CJ.10(Mg,Fe)2Al3(AlSi5O18)
β“˜Anthophyllite9.DD.05β—»{Mg2}{Mg5}(Si8O22)(OH)2
β“˜Tremolite9.DE.10β—»Ca2Mg5(Si8O22)(OH)2
β“˜Talc9.EC.05Mg3Si4O10(OH)2
β“˜Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
β“˜Phlogopite9.EC.20KMg3(AlSi3O10)(OH)2
Unclassified
β“˜'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
β“˜'Limonite'-
β“˜'Chlorite Group'-
β“˜'Hornblende Root Name Group'-β—»Ca2(Z2+4Z3+)(AlSi7O22)(OH,F,Cl)2
β“˜'Garnet Group'-X3Z2(SiO4)3
β“˜'Apatite'-Ca5(PO4)3(Cl/F/OH)

List of minerals for each chemical element

HHydrogen
Hβ“˜ Anthophyllite◻{Mg2}{Mg5}(Si8O22)(OH)2
Hβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Hβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Hβ“˜ MalachiteCu2(CO3)(OH)2
Hβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Hβ“˜ PhlogopiteKMg3(AlSi3O10)(OH)2
Hβ“˜ TalcMg3Si4O10(OH)2
Hβ“˜ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Hβ“˜ VesuvianiteCa19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9
Hβ“˜ Zoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Hβ“˜ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Hβ“˜ ApatiteCa5(PO4)3(Cl/F/OH)
CCarbon
Cβ“˜ MalachiteCu2(CO3)(OH)2
OOxygen
Oβ“˜ Anthophyllite◻{Mg2}{Mg5}(Si8O22)(OH)2
Oβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Oβ“˜ Cordierite(Mg,Fe)2Al3(AlSi5O18)
Oβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Oβ“˜ HematiteFe2O3
Oβ“˜ KyaniteAl2(SiO4)O
Oβ“˜ MalachiteCu2(CO3)(OH)2
Oβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Oβ“˜ PhlogopiteKMg3(AlSi3O10)(OH)2
Oβ“˜ QuartzSiO2
Oβ“˜ RutileTiO2
Oβ“˜ SpessartineMn32+Al2(SiO4)3
Oβ“˜ TalcMg3Si4O10(OH)2
Oβ“˜ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Oβ“˜ VesuvianiteCa19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9
Oβ“˜ Zoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Oβ“˜ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Oβ“˜ Garnet GroupX3Z2(SiO4)3
Oβ“˜ ApatiteCa5(PO4)3(Cl/F/OH)
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
Fβ“˜ ApatiteCa5(PO4)3(Cl/F/OH)
MgMagnesium
Mgβ“˜ Anthophyllite◻{Mg2}{Mg5}(Si8O22)(OH)2
Mgβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Mgβ“˜ Cordierite(Mg,Fe)2Al3(AlSi5O18)
Mgβ“˜ PhlogopiteKMg3(AlSi3O10)(OH)2
Mgβ“˜ TalcMg3Si4O10(OH)2
Mgβ“˜ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Mgβ“˜ VesuvianiteCa19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9
AlAluminium
Alβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Alβ“˜ Cordierite(Mg,Fe)2Al3(AlSi5O18)
Alβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Alβ“˜ KyaniteAl2(SiO4)O
Alβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Alβ“˜ PhlogopiteKMg3(AlSi3O10)(OH)2
Alβ“˜ SpessartineMn32+Al2(SiO4)3
Alβ“˜ VesuvianiteCa19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9
Alβ“˜ Zoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Alβ“˜ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
SiSilicon
Siβ“˜ Anthophyllite◻{Mg2}{Mg5}(Si8O22)(OH)2
Siβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Siβ“˜ Cordierite(Mg,Fe)2Al3(AlSi5O18)
Siβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Siβ“˜ KyaniteAl2(SiO4)O
Siβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Siβ“˜ PhlogopiteKMg3(AlSi3O10)(OH)2
Siβ“˜ QuartzSiO2
Siβ“˜ SpessartineMn32+Al2(SiO4)3
Siβ“˜ TalcMg3Si4O10(OH)2
Siβ“˜ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Siβ“˜ VesuvianiteCa19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9
Siβ“˜ Zoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Siβ“˜ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Siβ“˜ Garnet GroupX3Z2(SiO4)3
PPhosphorus
Pβ“˜ ApatiteCa5(PO4)3(Cl/F/OH)
SSulfur
Sβ“˜ BorniteCu5FeS4
Sβ“˜ ChalcopyriteCuFeS2
Sβ“˜ GalenaPbS
Sβ“˜ PyriteFeS2
Sβ“˜ PyrrhotiteFe1-xS
Sβ“˜ SphaleriteZnS
ClChlorine
Clβ“˜ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Clβ“˜ ApatiteCa5(PO4)3(Cl/F/OH)
KPotassium
Kβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Kβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Kβ“˜ PhlogopiteKMg3(AlSi3O10)(OH)2
CaCalcium
Caβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Caβ“˜ Tremolite◻Ca2Mg5(Si8O22)(OH)2
Caβ“˜ VesuvianiteCa19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9
Caβ“˜ Zoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Caβ“˜ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Caβ“˜ ApatiteCa5(PO4)3(Cl/F/OH)
TiTitanium
Tiβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Tiβ“˜ RutileTiO2
MnManganese
Mnβ“˜ SpessartineMn32+Al2(SiO4)3
FeIron
Feβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Feβ“˜ BorniteCu5FeS4
Feβ“˜ ChalcopyriteCuFeS2
Feβ“˜ Cordierite(Mg,Fe)2Al3(AlSi5O18)
Feβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Feβ“˜ HematiteFe2O3
Feβ“˜ PyriteFeS2
Feβ“˜ PyrrhotiteFe1-xS
Feβ“˜ VesuvianiteCa19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9
CuCopper
Cuβ“˜ BorniteCu5FeS4
Cuβ“˜ ChalcopyriteCuFeS2
Cuβ“˜ MalachiteCu2(CO3)(OH)2
ZnZinc
Znβ“˜ SphaleriteZnS
PbLead
Pbβ“˜ GalenaPbS

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

Hitchcock, Charles H. (1869): First Annual Report upon the Geology and Mineralogy of the State of New Hampshire.
Little, William (1870) History of Warren, pp.449-450.
Fowler-Billings & Page (1942), The Geology of the Cardigan and Rumney Quadrangles - New Hampshire.
Bannerman, Harold M. (1962): Ore Hill Zinc Mine, Warren, New Hampshire (New Hampshire State Planning and Development Commission)
Secord, Theresa K. and Brown, Philip E. (1986). Geology and geochemistry of the Ore Hill Zn-Pb-Cu massive sulfide deposit, Warren, New Hampshire (Economic Geology; April 1986: 81(2): 371-387.
Rocks & Minerals (2005), New Hampshire Mineral Locality Index: 80: 242-261.
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