Nenzel Hill, Rochester Mining District, Pershing County, Nevada, USAi
Regional Level Types | |
---|---|
Nenzel Hill | Hill |
Rochester Mining District | Mining District |
Pershing County | County |
Nevada | State |
USA | Country |
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Latitude & Longitude (WGS84):
40° 16' 59'' North , 118° 9' 14'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Mindat Locality ID:
58618
Long-form identifier:
mindat:1:2:58618:7
GUID (UUID V4):
05790cdd-dfae-427e-a915-bec789f04852
The Rochester District, in Pershing County, Nevada, was prospected beginning just after the Civil War. Early discoveries were of vein and placer gold. In the heart of the Rochester District is a topographic high called Nenzel Hill, named for Joseph Nenzel whose wife inherited a group of claims staked by her uncle around 1905. Nenzel discovered quartz veins containing very fine grained, dispersed argentite there around 1912. The discovery came very late in the history of gold and silver in the American west perhaps because of the very nondescript nature of the ore. The discovery of other similar vein silver deposits followed but those on Nenzel Hill were the most productive.
The Rochester District is underlain by late Paleozoic and Triassic age volcanics. Common among these volcanics are rhyolites have frequently been altered to a quartz-sericite-pyrite mineral assemblage. Deformation and the intrusion of granite porphyry and other granitic lithologies occurred in the Cretaceous. It is most likely that the silver-gold mineralization developed during this later phase of volcanism.
Most of the productive ore deposits, worked in the initial pulse of activity in the district, are vein-type occurrences. However, in large areas the country rock is cut by networks of small mineralized fractures, the whole of which is known as stockworks. In the initial period of mining the stockworks were not economically viable except at the Nevada Packard mine south of Nenzel Hill.
Today, in a much different economic and technological environment the stockworks have gained supreme importance. Vikre (1981) noted that the low grade silver-gold ore in the area around Nenzel Hill amount to 100 million tons. Since the mid-1980's that area, including Nenzel Hill, has become part of a large open pit mine operated by Coeur Rochester. A subsidiary pit has been developed south of the Nenzel Hill area on the site of the former Nevada Packard Mine.
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Rock Types Recorded
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ⓘ Acanthite Formula: Ag2S Localities: Plainview mine, Nenzel Hill, Rochester Mining District, Pershing County, Nevada, USA Rochester mines, Nenzel Hill, Rochester Mining District, Pershing County, Nevada, USA Nenzel Hill, Rochester Mining District, Pershing County, Nevada, USA Nenzel Crown Point Mines, Nenzel Hill, Rochester Mining District, Pershing County, Nevada, USA |
ⓘ Anglesite Formula: PbSO4 References: |
ⓘ Arsenopyrite Formula: FeAsS Localities: References: |
ⓘ Chalcanthite Formula: CuSO4 · 5H2O References: |
ⓘ Chalcocite Formula: Cu2S References: |
ⓘ Chalcophanite Formula: ZnMn4+3O7 · 3H2O References: |
ⓘ Chalcopyrite Formula: CuFeS2 Localities: |
ⓘ Chlorargyrite Formula: AgCl Localities: References: |
ⓘ Chlorargyrite var. Bromian Chlorargyrite Formula: Ag(Cl,Br) References: |
ⓘ Covellite Formula: CuS Localities: References: |
ⓘ Galena Formula: PbS Localities: |
ⓘ Goethite Formula: α-Fe3+O(OH) Localities: References: |
ⓘ Gold Formula: Au Localities: References: |
ⓘ Gold var. Electrum Formula: (Au,Ag) Localities: References: |
ⓘ Hematite Formula: Fe2O3 References: |
ⓘ Jarosite Formula: KFe3+3(SO4)2(OH)6 References: |
ⓘ 'K Feldspar' References: |
ⓘ 'Limonite' Localities: References: |
ⓘ Melanterite Formula: Fe2+(H2O)6SO4 · H2O References: |
ⓘ Muscovite Formula: KAl2(AlSi3O10)(OH)2 Localities: References: |
ⓘ Muscovite var. Sericite Formula: KAl2(AlSi3O10)(OH)2 Localities: References: |
ⓘ Owyheeite Formula: Ag3Pb10Sb11S28 References: |
ⓘ Polybasite Formula: [Ag6Sb2S7][Ag9CuS4] References: |
ⓘ Pyrargyrite Formula: Ag3SbS3 Localities: References: |
ⓘ Pyrite Formula: FeS2 Localities: |
ⓘ Pyrrhotite Formula: Fe1-xS References: |
ⓘ Quartz Formula: SiO2 Localities: |
ⓘ Silver Formula: Ag Localities: References: |
ⓘ Sphalerite Formula: ZnS Localities: |
ⓘ Stromeyerite Formula: AgCuS Localities: References: |
ⓘ Teallite Formula: PbSnS2 References: |
ⓘ 'Tetrahedrite Subgroup' Formula: Cu6(Cu4C2+2)Sb4S12S Localities: |
ⓘ 'Wad' References: |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 1 - Elements | |||
---|---|---|---|
ⓘ | Silver | 1.AA.05 | Ag |
ⓘ | Gold var. Electrum | 1.AA.05 | (Au,Ag) |
ⓘ | 1.AA.05 | Au | |
Group 2 - Sulphides and Sulfosalts | |||
ⓘ | Chalcocite | 2.BA.05 | Cu2S |
ⓘ | Acanthite | 2.BA.35 | Ag2S |
ⓘ | Stromeyerite | 2.BA.40 | AgCuS |
ⓘ | Covellite | 2.CA.05a | CuS |
ⓘ | Sphalerite | 2.CB.05a | ZnS |
ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
ⓘ | Pyrrhotite | 2.CC.10 | Fe1-xS |
ⓘ | Teallite | 2.CD.05 | PbSnS2 |
ⓘ | Galena | 2.CD.10 | PbS |
ⓘ | Pyrite | 2.EB.05a | FeS2 |
ⓘ | Arsenopyrite | 2.EB.20 | FeAsS |
ⓘ | Pyrargyrite | 2.GA.05 | Ag3SbS3 |
ⓘ | 'Tetrahedrite Subgroup' | 2.GB.05 | Cu6(Cu4C2+2)Sb4S12S |
ⓘ | Polybasite | 2.GB.15 | [Ag6Sb2S7][Ag9CuS4] |
ⓘ | Owyheeite | 2.HC.35 | Ag3Pb10Sb11S28 |
Group 3 - Halides | |||
ⓘ | Chlorargyrite var. Bromian Chlorargyrite | 3.AA.15 | Ag(Cl,Br) |
ⓘ | 3.AA.15 | AgCl | |
Group 4 - Oxides and Hydroxides | |||
ⓘ | Goethite | 4.00. | α-Fe3+O(OH) |
ⓘ | Hematite | 4.CB.05 | Fe2O3 |
ⓘ | Quartz | 4.DA.05 | SiO2 |
ⓘ | Chalcophanite | 4.FL.20 | ZnMn4+3O7 · 3H2O |
Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
ⓘ | Anglesite | 7.AD.35 | PbSO4 |
ⓘ | Jarosite | 7.BC.10 | KFe3+3(SO4)2(OH)6 |
ⓘ | Chalcanthite | 7.CB.20 | CuSO4 · 5H2O |
ⓘ | Melanterite | 7.CB.35 | Fe2+(H2O)6SO4 · H2O |
Group 9 - Silicates | |||
ⓘ | Muscovite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
ⓘ | var. Sericite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
Unclassified | |||
ⓘ | 'Limonite' | - | |
ⓘ | 'Wad' | - | |
ⓘ | 'K Feldspar' | - |
List of minerals for each chemical element
H | Hydrogen | |
---|---|---|
H | ⓘ Chalcophanite | ZnMn34+O7 · 3H2O |
H | ⓘ Chalcanthite | CuSO4 · 5H2O |
H | ⓘ Goethite | α-Fe3+O(OH) |
H | ⓘ Jarosite | KFe33+(SO4)2(OH)6 |
H | ⓘ Melanterite | Fe2+(H2O)6SO4 · H2O |
H | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
H | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
O | Oxygen | |
O | ⓘ Anglesite | PbSO4 |
O | ⓘ Chalcophanite | ZnMn34+O7 · 3H2O |
O | ⓘ Chalcanthite | CuSO4 · 5H2O |
O | ⓘ Goethite | α-Fe3+O(OH) |
O | ⓘ Hematite | Fe2O3 |
O | ⓘ Jarosite | KFe33+(SO4)2(OH)6 |
O | ⓘ Melanterite | Fe2+(H2O)6SO4 · H2O |
O | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
O | ⓘ Quartz | SiO2 |
O | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
Al | Aluminium | |
Al | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
Al | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
Si | Silicon | |
Si | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
Si | ⓘ Quartz | SiO2 |
Si | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
S | Sulfur | |
S | ⓘ Acanthite | Ag2S |
S | ⓘ Anglesite | PbSO4 |
S | ⓘ Arsenopyrite | FeAsS |
S | ⓘ Chalcopyrite | CuFeS2 |
S | ⓘ Chalcanthite | CuSO4 · 5H2O |
S | ⓘ Chalcocite | Cu2S |
S | ⓘ Covellite | CuS |
S | ⓘ Galena | PbS |
S | ⓘ Jarosite | KFe33+(SO4)2(OH)6 |
S | ⓘ Melanterite | Fe2+(H2O)6SO4 · H2O |
S | ⓘ Owyheeite | Ag3Pb10Sb11S28 |
S | ⓘ Polybasite | [Ag6Sb2S7][Ag9CuS4] |
S | ⓘ Pyrargyrite | Ag3SbS3 |
S | ⓘ Pyrite | FeS2 |
S | ⓘ Pyrrhotite | Fe1-xS |
S | ⓘ Sphalerite | ZnS |
S | ⓘ Stromeyerite | AgCuS |
S | ⓘ Teallite | PbSnS2 |
S | ⓘ Tetrahedrite Subgroup | Cu6(Cu4C22+)Sb4S12S |
Cl | Chlorine | |
Cl | ⓘ Chlorargyrite | AgCl |
Cl | ⓘ Chlorargyrite var. Bromian Chlorargyrite | Ag(Cl,Br) |
K | Potassium | |
K | ⓘ Jarosite | KFe33+(SO4)2(OH)6 |
K | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
K | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
Mn | Manganese | |
Mn | ⓘ Chalcophanite | ZnMn34+O7 · 3H2O |
Fe | Iron | |
Fe | ⓘ Arsenopyrite | FeAsS |
Fe | ⓘ Chalcopyrite | CuFeS2 |
Fe | ⓘ Goethite | α-Fe3+O(OH) |
Fe | ⓘ Hematite | Fe2O3 |
Fe | ⓘ Jarosite | KFe33+(SO4)2(OH)6 |
Fe | ⓘ Melanterite | Fe2+(H2O)6SO4 · H2O |
Fe | ⓘ Pyrite | FeS2 |
Fe | ⓘ Pyrrhotite | Fe1-xS |
Cu | Copper | |
Cu | ⓘ Chalcopyrite | CuFeS2 |
Cu | ⓘ Chalcanthite | CuSO4 · 5H2O |
Cu | ⓘ Chalcocite | Cu2S |
Cu | ⓘ Covellite | CuS |
Cu | ⓘ Polybasite | [Ag6Sb2S7][Ag9CuS4] |
Cu | ⓘ Stromeyerite | AgCuS |
Cu | ⓘ Tetrahedrite Subgroup | Cu6(Cu4C22+)Sb4S12S |
Zn | Zinc | |
Zn | ⓘ Chalcophanite | ZnMn34+O7 · 3H2O |
Zn | ⓘ Sphalerite | ZnS |
As | Arsenic | |
As | ⓘ Arsenopyrite | FeAsS |
Br | Bromine | |
Br | ⓘ Chlorargyrite var. Bromian Chlorargyrite | Ag(Cl,Br) |
Ag | Silver | |
Ag | ⓘ Acanthite | Ag2S |
Ag | ⓘ Chlorargyrite | AgCl |
Ag | ⓘ Gold var. Electrum | (Au,Ag) |
Ag | ⓘ Chlorargyrite var. Bromian Chlorargyrite | Ag(Cl,Br) |
Ag | ⓘ Owyheeite | Ag3Pb10Sb11S28 |
Ag | ⓘ Polybasite | [Ag6Sb2S7][Ag9CuS4] |
Ag | ⓘ Pyrargyrite | Ag3SbS3 |
Ag | ⓘ Silver | Ag |
Ag | ⓘ Stromeyerite | AgCuS |
Sn | Tin | |
Sn | ⓘ Teallite | PbSnS2 |
Sb | Antimony | |
Sb | ⓘ Owyheeite | Ag3Pb10Sb11S28 |
Sb | ⓘ Polybasite | [Ag6Sb2S7][Ag9CuS4] |
Sb | ⓘ Pyrargyrite | Ag3SbS3 |
Sb | ⓘ Tetrahedrite Subgroup | Cu6(Cu4C22+)Sb4S12S |
Au | Gold | |
Au | ⓘ Gold var. Electrum | (Au,Ag) |
Au | ⓘ Gold | Au |
Pb | Lead | |
Pb | ⓘ Anglesite | PbSO4 |
Pb | ⓘ Galena | PbS |
Pb | ⓘ Owyheeite | Ag3Pb10Sb11S28 |
Pb | ⓘ Teallite | PbSnS2 |
Localities in this Region
- Nevada
- Pershing County
- Rochester Mining District
- Nenzel Hill
- Rochester Mining District
- Pershing County
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Auld Lang Syne BasinBasin
- Basin and Range BasinsBasin
- Golconda-Roberts Mountain DomainDomain
- Havallah BasinBasin
- West Nevada Permian-Triassic BasinBasin
USA
- Lake LahontanLake
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