Northumberland Mine, Northumberland Mining District, Toquima Range, Nye County, Nevada, USAi
Regional Level Types | |
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Northumberland Mine | Mine |
Northumberland Mining District | Mining District |
Toquima Range | Mountain Range |
Nye County | County |
Nevada | State |
USA | Country |
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Latitude & Longitude (WGS84):
38° 57' 29'' North , 116° 50' 48'' West
Latitude & Longitude (decimal):
Type:
KΓΆppen climate type:
Nearest Settlements:
Place | Population | Distance |
---|---|---|
Kingston | 113 (2011) | 33.9km |
Mindat Locality ID:
29784
Long-form identifier:
mindat:1:2:29784:9
GUID (UUID V4):
eb034e8c-f85e-4758-acbc-135988199dd6
This mine has been operated intermittently since 1866 for silver, gold and barite.
Structure: Major thrust sheets have affected the rocks. A Jurassic granodioritic stock has domed the country rocks. Silicified horizons of the Pogonip group rocks have been extensively fractured and microfractured.
Alteration: silicification, sericitization, jasperoid, argillization
Tectonics: Northumberland caldera ring fracture zone
Commodity: Ore Materials: ruby silver, cerargyrite, arsenopyrite, free gold, scorodite Gangue Materials: quartz, jasperoid,sericite, barite
Deposit: There are 3 main veins at the deposit: Lady Cummings, Northumberland, and Detroit veins. Disseminated gold mineralization occurs largely in a carbonaceous shale bed near contact of granitic intrusive. Ore is present in both upper and lower plate rocks along thrust fault. Siltstone and limestone have been considerably replaced by jasperoid, which is locally hydrothermally brecciated. Late-stage veinlets contain coarse barite crystals. Ore is strongly altered, iron-oxide-stained, thin-bedded carbonaceous shale. On the west side of the canyon are highly altered, fractured volcanic rocks. Gold occurs in microfracture fillings of quartz and barite in silicified horizons of the Ordovician Pogonip Group associated with the margins of a monzonite intrusive. Disseminated gold mineralization occurs largely in a carbonaceous shale bed near the contact with a granitic intrusive. Ore is present in both upper and lower plate rocks along a thrust fault. Siltstone and limestone have been considerably replaced by jasperoid, which is locally hydrothermally brecciated. Late stage veinlets contain coarse barite crystals.
Deposit type: Carbonate-hosted Au-Ag
Development: The silver deposits were discovered in 1866 and the Monitor-Blue Bell ore was treated at a 10-stamp mill at a spring in West Northumberland Canyon, now marked by stone ruins. Sporadic silver mining continued until 1891. Gold was discovered just east of the old silver workings in 1936 and the Northumberland Mining Co was operating from 1939 until 1942 when the gold mine was closed. Gold exploration was resumed in the 1960s by Homestake , Idaho Mining Co., and others in the 1970s resulting in the mining of the low-grade gold deposit in 1981, first by Amoco (later Cyprus Minerals), with mining continuing off and on to the present at the rate of 3000 tpd heap leached ore. Standard Oil Co. spun off Cyprus in 1985. Newmont drilled seven widely spaced holes on the property in 1989 to test targets in Tertiary volcanic tuffs and encountered shallow oxide gold mineralization. In 2003, the NewWest Resources Group's Nevada Western Gold Corporation announced that Newmont Mining Corporation had signed a joint venture agreement for the exploration and development of its Northumberland project. Newmont would be pursuing its exploration program at Northumberland and was embarking on a drilling program in 2004.
Geology: Disseminated gold mineralization occurs largely in a carbonaceous shale bed near the contact with a granitic intrusive. Ore is present in both upper and lower plate rocks along a thrust fault. Siltstone and limestone have been considerably replaced by jasperoid, which is locally hydrothermally brecciated. Late stage veinlets contain coarse barite crystals.
Ore(s): Ore is in and adjacent to a thrust fault separating lower plate Roberts Mtn Fm from upper plate Vinini Fm. Calcareous argillite bed is intruded by felsitic porphyry dikes.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
30 valid minerals.
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 DiagramDetailed Mineral List:
β Aragonite Formula: CaCO3 References: |
β Arsenopyrite Formula: FeAsS |
β Azurite Formula: Cu3(CO3)2(OH)2 References: |
β Baryte Formula: BaSO4 Habit: elongated along the b-axis <010> Colour: greenish brown, golden brown, gray-blue and colorless Description: Baryte is common in the eastern flank of the deposit. Crystals in excess of 12 cm have been found lining pockets in jasperoid. Pockets up to 2.5 meters in length and 2 meters wide have been found. Barite in these pockets is commonly etched. The crystals formerly lining the upper portions of the pockets are usually found in a rubble at the bottom of the pocket. The pockets appear to be larger and more common in the northeast area of the pit.
occasionally show phantom inclusions of limonite. |
β Bornite Formula: Cu5FeS4 |
β Calcite Formula: CaCO3 References: |
β Chalcopyrite Formula: CuFeS2 |
β Chlorargyrite Formula: AgCl |
β Chrysocolla Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
β Fluorapatite Formula: Ca5(PO4)3F References: |
β 'Freibergite Subgroup' Formula: (Ag6,[Ag6]4+)(Cu4 C2+2)Sb4S12S0-1 References: |
β Goethite Formula: Ξ±-Fe3+O(OH) |
β Gold Formula: Au |
β Gypsum Formula: CaSO4 · 2H2O References: |
β Jarosite Formula: KFe3+3(SO4)2(OH)6 References: |
β Malachite Formula: Cu2(CO3)(OH)2 References: |
β Marcasite Formula: FeS2 References: Erich Laskowski (1949-2020) Collection--Personally collected.Identification: Dealer/Collection Label |
β Montgomeryite Formula: Ca4MgAl4(PO4)6(OH)4 · 12H2O |
β Muscovite Formula: KAl2(AlSi3O10)(OH)2 |
β Muscovite var. Sericite Formula: KAl2(AlSi3O10)(OH)2 References: Erich Laskowski (1949-2020) Collection--Personally collected.Identification: Dealer/Collection Label |
β Natrojarosite Formula: NaFe3(SO4)2(OH)6 |
β Olivenite Formula: Cu2(AsO4)(OH) |
β Opal Formula: SiO2 · nH2O References: |
β Pharmacosiderite Formula: KFe3+4(AsO4)3(OH)4 · 6-7H2O References: |
β Pitticite Formula: (Fe, AsO4, H2O) (?) References: |
β Proustite Formula: Ag3AsS3 References: |
β Pyrargyrite Formula: Ag3SbS3 |
β Pyrite Formula: FeS2 References: |
β Quartz Formula: SiO2 |
β Scorodite Formula: Fe3+AsO4 · 2H2O |
β Stibnite Formula: Sb2S3 References: Erich Laskowski (1949-2020) Collection--Personally collected.Identification: Dealer/Collection Label |
β Strengite Formula: FePO4 · 2H2O References: |
β 'Tetrahedrite Subgroup' Formula: Cu6(Cu4C2+2)Sb4S12S References: Erich Laskowski (1949-2020) Collection--Personally collected.Identification: Dealer/Collection Label |
List of minerals arranged by Strunz 10th Edition classification
Group 1 - Elements | |||
---|---|---|---|
β | Gold | 1.AA.05 | Au |
Group 2 - Sulphides and Sulfosalts | |||
β | Bornite | 2.BA.15 | Cu5FeS4 |
β | Chalcopyrite | 2.CB.10a | CuFeS2 |
β | Stibnite | 2.DB.05 | Sb2S3 |
β | Pyrite | 2.EB.05a | FeS2 |
β | Marcasite | 2.EB.10a | FeS2 |
β | Arsenopyrite | 2.EB.20 | FeAsS |
β | Proustite | 2.GA.05 | Ag3AsS3 |
β | Pyrargyrite | 2.GA.05 | Ag3SbS3 |
β | 'Tetrahedrite Subgroup' | 2.GB.05 | Cu6(Cu4C2+2)Sb4S12S |
β | 'Freibergite Subgroup' | 2.GB.05 | (Ag6,[Ag6]4+)(Cu4 C2+2)Sb4S12S0-1 |
Group 3 - Halides | |||
β | Chlorargyrite | 3.AA.15 | AgCl |
Group 4 - Oxides and Hydroxides | |||
β | Goethite | 4.00. | Ξ±-Fe3+O(OH) |
β | Quartz | 4.DA.05 | SiO2 |
β | Opal | 4.DA.10 | SiO2 Β· nH2O |
Group 5 - Nitrates and Carbonates | |||
β | Calcite | 5.AB.05 | CaCO3 |
β | Aragonite | 5.AB.15 | CaCO3 |
β | Azurite | 5.BA.05 | Cu3(CO3)2(OH)2 |
β | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
β | Baryte | 7.AD.35 | BaSO4 |
β | Jarosite | 7.BC.10 | KFe3+3(SO4)2(OH)6 |
β | Natrojarosite | 7.BC.10 | NaFe3(SO4)2(OH)6 |
β | Gypsum | 7.CD.40 | CaSO4 Β· 2H2O |
Group 8 - Phosphates, Arsenates and Vanadates | |||
β | Olivenite | 8.BB.30 | Cu2(AsO4)(OH) |
β | Fluorapatite | 8.BN.05 | Ca5(PO4)3F |
β | Strengite | 8.CD.10 | FePO4 Β· 2H2O |
β | Scorodite | 8.CD.10 | Fe3+AsO4 Β· 2H2O |
β | Pitticite | 8.DB.05 | (Fe, AsO4, H2O) (?) |
β | Montgomeryite | 8.DH.25 | Ca4MgAl4(PO4)6(OH)4 Β· 12H2O |
β | Pharmacosiderite | 8.DK.10 | KFe3+4(AsO4)3(OH)4 Β· 6-7H2O |
Group 9 - Silicates | |||
β | Muscovite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
β | var. Sericite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
β | Chrysocolla | 9.ED.20 | Cu2-xAlx(H2-xSi2O5)(OH)4 Β· nH2O, x < 1 |
List of minerals for each chemical element
H | Hydrogen | |
---|---|---|
H | β Azurite | Cu3(CO3)2(OH)2 |
H | β Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
H | β Goethite | Ξ±-Fe3+O(OH) |
H | β Gypsum | CaSO4 · 2H2O |
H | β Jarosite | KFe33+(SO4)2(OH)6 |
H | β Malachite | Cu2(CO3)(OH)2 |
H | β Montgomeryite | Ca4MgAl4(PO4)6(OH)4 · 12H2O |
H | β Muscovite | KAl2(AlSi3O10)(OH)2 |
H | β Natrojarosite | NaFe3(SO4)2(OH)6 |
H | β Olivenite | Cu2(AsO4)(OH) |
H | β Opal | SiO2 · nH2O |
H | β Pharmacosiderite | KFe43+(AsO4)3(OH)4 · 6-7H2O |
H | β Pitticite | (Fe, AsO4, H2O) (?) |
H | β Scorodite | Fe3+AsO4 · 2H2O |
H | β Strengite | FePO4 · 2H2O |
H | β Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
C | Carbon | |
C | β Aragonite | CaCO3 |
C | β Azurite | Cu3(CO3)2(OH)2 |
C | β Calcite | CaCO3 |
C | β Malachite | Cu2(CO3)(OH)2 |
O | Oxygen | |
O | β Aragonite | CaCO3 |
O | β Azurite | Cu3(CO3)2(OH)2 |
O | β Baryte | BaSO4 |
O | β Calcite | CaCO3 |
O | β Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
O | β Fluorapatite | Ca5(PO4)3F |
O | β Goethite | Ξ±-Fe3+O(OH) |
O | β Gypsum | CaSO4 · 2H2O |
O | β Jarosite | KFe33+(SO4)2(OH)6 |
O | β Malachite | Cu2(CO3)(OH)2 |
O | β Montgomeryite | Ca4MgAl4(PO4)6(OH)4 · 12H2O |
O | β Muscovite | KAl2(AlSi3O10)(OH)2 |
O | β Natrojarosite | NaFe3(SO4)2(OH)6 |
O | β Olivenite | Cu2(AsO4)(OH) |
O | β Opal | SiO2 · nH2O |
O | β Pharmacosiderite | KFe43+(AsO4)3(OH)4 · 6-7H2O |
O | β Pitticite | (Fe, AsO4, H2O) (?) |
O | β Quartz | SiO2 |
O | β Scorodite | Fe3+AsO4 · 2H2O |
O | β Strengite | FePO4 · 2H2O |
O | β Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
F | Fluorine | |
F | β Fluorapatite | Ca5(PO4)3F |
Na | Sodium | |
Na | β Natrojarosite | NaFe3(SO4)2(OH)6 |
Mg | Magnesium | |
Mg | β Montgomeryite | Ca4MgAl4(PO4)6(OH)4 · 12H2O |
Al | Aluminium | |
Al | β Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
Al | β Montgomeryite | Ca4MgAl4(PO4)6(OH)4 · 12H2O |
Al | β Muscovite | KAl2(AlSi3O10)(OH)2 |
Al | β Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
Si | Silicon | |
Si | β Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
Si | β Muscovite | KAl2(AlSi3O10)(OH)2 |
Si | β Opal | SiO2 · nH2O |
Si | β Quartz | SiO2 |
Si | β Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
P | Phosphorus | |
P | β Fluorapatite | Ca5(PO4)3F |
P | β Montgomeryite | Ca4MgAl4(PO4)6(OH)4 · 12H2O |
P | β Strengite | FePO4 · 2H2O |
S | Sulfur | |
S | β Arsenopyrite | FeAsS |
S | β Baryte | BaSO4 |
S | β Bornite | Cu5FeS4 |
S | β Chalcopyrite | CuFeS2 |
S | β Freibergite Subgroup | (Ag6,[Ag6]4+)(Cu4 C22+)Sb4S12S0-1 |
S | β Gypsum | CaSO4 · 2H2O |
S | β Jarosite | KFe33+(SO4)2(OH)6 |
S | β Marcasite | FeS2 |
S | β Natrojarosite | NaFe3(SO4)2(OH)6 |
S | β Proustite | Ag3AsS3 |
S | β Pyrargyrite | Ag3SbS3 |
S | β Pyrite | FeS2 |
S | β Stibnite | Sb2S3 |
S | β Tetrahedrite Subgroup | Cu6(Cu4C22+)Sb4S12S |
Cl | Chlorine | |
Cl | β Chlorargyrite | AgCl |
K | Potassium | |
K | β Jarosite | KFe33+(SO4)2(OH)6 |
K | β Muscovite | KAl2(AlSi3O10)(OH)2 |
K | β Pharmacosiderite | KFe43+(AsO4)3(OH)4 · 6-7H2O |
K | β Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
Ca | Calcium | |
Ca | β Aragonite | CaCO3 |
Ca | β Calcite | CaCO3 |
Ca | β Fluorapatite | Ca5(PO4)3F |
Ca | β Gypsum | CaSO4 · 2H2O |
Ca | β Montgomeryite | Ca4MgAl4(PO4)6(OH)4 · 12H2O |
Fe | Iron | |
Fe | β Arsenopyrite | FeAsS |
Fe | β Bornite | Cu5FeS4 |
Fe | β Chalcopyrite | CuFeS2 |
Fe | β Goethite | Ξ±-Fe3+O(OH) |
Fe | β Jarosite | KFe33+(SO4)2(OH)6 |
Fe | β Marcasite | FeS2 |
Fe | β Natrojarosite | NaFe3(SO4)2(OH)6 |
Fe | β Pharmacosiderite | KFe43+(AsO4)3(OH)4 · 6-7H2O |
Fe | β Pitticite | (Fe, AsO4, H2O) (?) |
Fe | β Pyrite | FeS2 |
Fe | β Scorodite | Fe3+AsO4 · 2H2O |
Fe | β Strengite | FePO4 · 2H2O |
Cu | Copper | |
Cu | β Azurite | Cu3(CO3)2(OH)2 |
Cu | β Bornite | Cu5FeS4 |
Cu | β Chalcopyrite | CuFeS2 |
Cu | β Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
Cu | β Freibergite Subgroup | (Ag6,[Ag6]4+)(Cu4 C22+)Sb4S12S0-1 |
Cu | β Malachite | Cu2(CO3)(OH)2 |
Cu | β Olivenite | Cu2(AsO4)(OH) |
Cu | β Tetrahedrite Subgroup | Cu6(Cu4C22+)Sb4S12S |
As | Arsenic | |
As | β Arsenopyrite | FeAsS |
As | β Olivenite | Cu2(AsO4)(OH) |
As | β Pharmacosiderite | KFe43+(AsO4)3(OH)4 · 6-7H2O |
As | β Pitticite | (Fe, AsO4, H2O) (?) |
As | β Proustite | Ag3AsS3 |
As | β Scorodite | Fe3+AsO4 · 2H2O |
Ag | Silver | |
Ag | β Chlorargyrite | AgCl |
Ag | β Freibergite Subgroup | (Ag6,[Ag6]4+)(Cu4 C22+)Sb4S12S0-1 |
Ag | β Proustite | Ag3AsS3 |
Ag | β Pyrargyrite | Ag3SbS3 |
Sb | Antimony | |
Sb | β Freibergite Subgroup | (Ag6,[Ag6]4+)(Cu4 C22+)Sb4S12S0-1 |
Sb | β Pyrargyrite | Ag3SbS3 |
Sb | β Stibnite | Sb2S3 |
Sb | β Tetrahedrite Subgroup | Cu6(Cu4C22+)Sb4S12S |
Ba | Barium | |
Ba | β Baryte | BaSO4 |
Au | Gold | |
Au | β Gold | Au |
Other Databases
Link to USGS MRDS: | 10310362 |
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Other Regions, Features and Areas containing this locality
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