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Richmond-Eureka mine (Ruby Hill mine), Ruby Hill, Eureka District, Eureka Co., Nevada, USAi
Regional Level Types
Richmond-Eureka mine (Ruby Hill mine)Mine
Ruby HillHill
Eureka DistrictMining District
Eureka Co.County
NevadaState
USACountry

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Latitude & Longitude (WGS84):
39° 31' 33'' North , 115° 59' 3'' West
Latitude & Longitude (decimal):
Locality type:
Nearest Settlements:
PlacePopulationDistance
Eureka610 (2011)2.5km


Alteration: Zones of silicification, jasperoid development, and limestone decalcification (decarbonization) guided ore formation.

Tectonics: Central Nevada Fold Belt

Commodity: Commodity Info: Mercury is retorted from process metal sludge. Ore Materials: gold, electrum Gangue Materials: quartz, limonite, hematite, pyrite, cinnabar, barite, various sulfide minerals

Deposit: Archimedes is a Carlin-style sediment-hosted gold deposit in carbonate rocks. The ore is a mixture of jasperoid and decalcified limestone exhibiting strong structural controls. Micron-size gold is associated with oxidized pyrite sites and is strongly fracture controlled. Deeper portions of the east Archimedes resource are sulfidic, and root-zones include retrograde-altered base metal skarn and marble hosts. The mineralized area closely adjoins a Cretaceous porphyry intrusive and may be genetically linked to it, as both base metal-related adularia and the intrusive yield similar radiometric ages. Some evidence suggests the presence of a younger cross-cutting Au-As-Hg system superimposed on the earlier base-metal system and associated with Oligocene magmatism. The West Archimedes deposit is about 780 m long, plunging gently S60?E and covered by 15 to 150 m of partially cemented calcareous alluvium. The deposit is subtabular to ovate in cross section, branching locally at structural intersections. The orebody has a central elongated lens of higher grade jasperoid ore enclosed by a more tabular envelope of lower grade decalcified limestone ore.

Development: The initial discovery sample was collected in 1991 by a geologist working under contract to Homestake from a pit north of the old Holly Extension mine dump. The first hole was drilled in the orebody in 1992, and an economic deposit was indicated by mid-1993. The Archimedes orebody was discovered by rock-chip sampling and subsequent geochemical soil anomaly and drilling. Stripping of the Archimedes deposit began in early 1997, and the first gold was poured on November 6,1997. By year?s end, the mine had reached expected production of 3,500 tons per day, of which about 2,600 tons of lower-grade ore is heap leached, while 900 tons of higher-grade material is sent to the mill. The stripping ratio is 7-to-1 and anticipated production is between 105,000 and 110,000 troy ounces of gold annually. Exploration in 1998 continued in the immediate area to identify other shallow oxide deposits as well as a deep drilling program designed to further define a zone of high grade sulfide mineralization discovered 1,500 feet below the West Archimedes open pit. By 2005, Barrick reported that thecurrent project will be an open-pit, heap leach operation exploiting the East Archimedes deposit, a deeper continuation of the ore mined previously at Ruby Hill. Permitting has been secured and the two-year, approximately $75-million construction phase is underway. The project is expected to enter production in early 2007 and has reserves of 1.0 million ounces at December 31, 2005.

Geology: The primary host rock of the Archimedes deposit is thin to thick bedded cherty limestone of the early Ordovician Goodwin Limestone of the Pogonip Group. minor hosts are micritic to shaley limestone of the early Ordovician Ninemile Formation also of the Pogonip Group, and early Cretaceous quartz porphyry. Archimedes satellite deposits are hosted by fine- to coarse early to middle Ordovician limestone and chert of the Antelope Valley Limestone, also of the Pogonip Group. The West Archimedes deposit is a more stratigraphically controlled offshoot of the East Archimedes deposit, a steeply-plunging, oxidized, gold-bearing jasperoid breccia adjoining the quartz-feldspar porphyry intrusive.

Regions containing this locality

North America PlateTectonic Plate

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Standard Detailed Strunz Dana Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded from this region.


Mineral List

Mineral list contains entries from the region specified including sub-localities

37 valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Rock list contains entries from the region specified including sub-localities

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Alphabetical List Tree Diagram

Detailed Mineral List:

'Albite-Anorthite Series'
Reference: Hastings, M. H. (2008). Relationship of base-metal skarn mineralization to Carlin-type gold mineralization at the Archimedes gold deposit, Eureka, Nevada. Masters thesis University of Nevada, Reno.
'Andradite-Grossular Series'
Reference: Hastings, M. H. (2008). Relationship of base-metal skarn mineralization to Carlin-type gold mineralization at the Archimedes gold deposit, Eureka, Nevada. Masters thesis University of Nevada, Reno.
Anglesite
Formula: PbSO4
Reference: Rocks & Minerals, Nov. 1999
'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
Reference: Hastings, M. H. (2008). Relationship of base-metal skarn mineralization to Carlin-type gold mineralization at the Archimedes gold deposit, Eureka, Nevada. Masters thesis University of Nevada, Reno.
Aragonite
Formula: CaCO3
Reference: NBMG Spec. Pub. 31 Minerals of Nevada
Arsenopyrite
Formula: FeAsS
Reference: Hastings, M. H. (2008). Relationship of base-metal skarn mineralization to Carlin-type gold mineralization at the Archimedes gold deposit, Eureka, Nevada. Masters thesis University of Nevada, Reno.
Baryte
Formula: BaSO4
Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Calcite
Formula: CaCO3
Reference: NBMG Spec. Pub. 31 Minerals of Nevada; Hastings, M. H. (2008). Relationship of base-metal skarn mineralization to Carlin-type gold mineralization at the Archimedes gold deposit, Eureka, Nevada. Masters thesis University of Nevada, Reno.
Cerussite
Formula: PbCO3
Reference: Rocks & Minerals, Nov. 1999
Chalcopyrite
Formula: CuFeS2
Reference: Hastings, M. H. (2008). Relationship of base-metal skarn mineralization to Carlin-type gold mineralization at the Archimedes gold deposit, Eureka, Nevada. Masters thesis University of Nevada, Reno.
'Chlorite Group'
Reference: Hastings, M. H. (2008). Relationship of base-metal skarn mineralization to Carlin-type gold mineralization at the Archimedes gold deposit, Eureka, Nevada. Masters thesis University of Nevada, Reno.
Cinnabar
Formula: HgS
Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Copper
Formula: Cu
Reference: Hastings, M. H. (2008). Relationship of base-metal skarn mineralization to Carlin-type gold mineralization at the Archimedes gold deposit, Eureka, Nevada. Masters thesis University of Nevada, Reno.
Covellite
Formula: CuS
Reference: Hastings, M. H. (2008). Relationship of base-metal skarn mineralization to Carlin-type gold mineralization at the Archimedes gold deposit, Eureka, Nevada. Masters thesis University of Nevada, Reno.
Digenite
Formula: Cu9S5
Reference: Hastings, M. H. (2008). Relationship of base-metal skarn mineralization to Carlin-type gold mineralization at the Archimedes gold deposit, Eureka, Nevada. Masters thesis University of Nevada, Reno.
'Electrum'
Formula: (Au, Ag)
Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Reference: Hastings, M. H. (2008). Relationship of base-metal skarn mineralization to Carlin-type gold mineralization at the Archimedes gold deposit, Eureka, Nevada. Masters thesis University of Nevada, Reno.
Galena
Formula: PbS
Reference: Rocks & Minerals, Nov. 1999
Gold
Formula: Au
Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Hawleyite
Formula: CdS
Reference: Rocks & Minerals, Nov. 1999
Hematite
Formula: Fe2O3
Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; Hastings, M. H. (2008). Relationship of base-metal skarn mineralization to Carlin-type gold mineralization at the Archimedes gold deposit, Eureka, Nevada. Masters thesis University of Nevada, Reno.
Hemimorphite
Formula: Zn4Si2O7(OH)2 · H2O
Reference: Rocks & Minerals, Nov. 1999
Jarosite
Formula: KFe3+ 3(SO4)2(OH)6
Reference: Hastings, M. H. (2008). Relationship of base-metal skarn mineralization to Carlin-type gold mineralization at the Archimedes gold deposit, Eureka, Nevada. Masters thesis University of Nevada, Reno.
Kaolinite
Formula: Al2(Si2O5)(OH)4
Reference: Hastings, M. H. (2008). Relationship of base-metal skarn mineralization to Carlin-type gold mineralization at the Archimedes gold deposit, Eureka, Nevada. Masters thesis University of Nevada, Reno.
'K Feldspar'
Reference: Hastings, M. H. (2008). Relationship of base-metal skarn mineralization to Carlin-type gold mineralization at the Archimedes gold deposit, Eureka, Nevada. Masters thesis University of Nevada, Reno.
'K Feldspar var: Adularia'
Formula: KAlSi3O8
Reference: Hastings, M. H. (2008). Relationship of base-metal skarn mineralization to Carlin-type gold mineralization at the Archimedes gold deposit, Eureka, Nevada. Masters thesis University of Nevada, Reno.
Leadhillite
Formula: Pb4(CO3)2(SO4)(OH)2
Reference: Rocks & Minerals, Nov. 1999
'Limonite'
Formula: (Fe,O,OH,H2O)
Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Marcasite
Formula: FeS2
Massicot
Formula: PbO
Reference: NBMG Spec. Pub. 31 Minerals of Nevada
Mimetite
Formula: Pb5(AsO4)3Cl
Reference: NBMG Spec. Pub. 31 Minerals of Nevada
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Hastings, M. H. (2008). Relationship of base-metal skarn mineralization to Carlin-type gold mineralization at the Archimedes gold deposit, Eureka, Nevada. Masters thesis University of Nevada, Reno.
Muscovite var: Illite
Formula: K0.65Al2.0[Al0.65Si3.35O10](OH)2
Reference: Hastings, M. H. (2008). Relationship of base-metal skarn mineralization to Carlin-type gold mineralization at the Archimedes gold deposit, Eureka, Nevada. Masters thesis University of Nevada, Reno.
Muscovite var: Sericite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Hastings, M. H. (2008). Relationship of base-metal skarn mineralization to Carlin-type gold mineralization at the Archimedes gold deposit, Eureka, Nevada. Masters thesis University of Nevada, Reno.
Orpiment
Formula: As2S3
Reference: Hastings, M. H. (2008). Relationship of base-metal skarn mineralization to Carlin-type gold mineralization at the Archimedes gold deposit, Eureka, Nevada. Masters thesis University of Nevada, Reno.
Plumbojarosite
Formula: Pb0.5Fe3+3(SO4)2(OH)6
Reference: NBMG Spec. Pub. 31 Minerals of Nevada
Pyrite
Formula: FeS2
Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; Hastings, M. H. (2008). Relationship of base-metal skarn mineralization to Carlin-type gold mineralization at the Archimedes gold deposit, Eureka, Nevada. Masters thesis University of Nevada, Reno.
'Pyroxene Group'
Reference: Hastings, M. H. (2008). Relationship of base-metal skarn mineralization to Carlin-type gold mineralization at the Archimedes gold deposit, Eureka, Nevada. Masters thesis University of Nevada, Reno.
Quartz
Formula: SiO2
Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; Hastings, M. H. (2008). Relationship of base-metal skarn mineralization to Carlin-type gold mineralization at the Archimedes gold deposit, Eureka, Nevada. Masters thesis University of Nevada, Reno.
Quartz var: Chalcedony
Formula: SiO2
Reference: Hastings, M. H. (2008). Relationship of base-metal skarn mineralization to Carlin-type gold mineralization at the Archimedes gold deposit, Eureka, Nevada. Masters thesis University of Nevada, Reno.
Quartz var: Jasper
Reference: Hastings, M. H. (2008). Relationship of base-metal skarn mineralization to Carlin-type gold mineralization at the Archimedes gold deposit, Eureka, Nevada. Masters thesis University of Nevada, Reno.
Realgar
Formula: As4S4
Reference: Hastings, M. H. (2008). Relationship of base-metal skarn mineralization to Carlin-type gold mineralization at the Archimedes gold deposit, Eureka, Nevada. Masters thesis University of Nevada, Reno.
Rutile
Formula: TiO2
Reference: Hastings, M. H. (2008). Relationship of base-metal skarn mineralization to Carlin-type gold mineralization at the Archimedes gold deposit, Eureka, Nevada. Masters thesis University of Nevada, Reno.
'Scapolite'
Reference: Hastings, M. H. (2008). Relationship of base-metal skarn mineralization to Carlin-type gold mineralization at the Archimedes gold deposit, Eureka, Nevada. Masters thesis University of Nevada, Reno.
Siderite
Formula: FeCO3
Reference: Hastings, M. H. (2008). Relationship of base-metal skarn mineralization to Carlin-type gold mineralization at the Archimedes gold deposit, Eureka, Nevada. Masters thesis University of Nevada, Reno.
Sphalerite
Formula: ZnS
Reference: Rocks & Minerals, Nov. 1999; Peter G. Vikre (1998) Intrusion-related, polymetallic carbonate replacement deposits in the Eureka district, Eureka County, Nevada. Nevada Bureau of Mines and Geology Bulletin 110
Stilpnomelane
Formula: (K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Reference: Hastings, M. H. (2008). Relationship of base-metal skarn mineralization to Carlin-type gold mineralization at the Archimedes gold deposit, Eureka, Nevada. Masters thesis University of Nevada, Reno.
Tennantite
Formula: Cu6[Cu4(Fe,Zn)2]As4S13
Reference: Hastings, M. H. (2008). Relationship of base-metal skarn mineralization to Carlin-type gold mineralization at the Archimedes gold deposit, Eureka, Nevada. Masters thesis University of Nevada, Reno.
Tetrahedrite
Formula: Cu6[Cu4(Fe,Zn)2]Sb4S13
Reference: Hastings, M. H. (2008). Relationship of base-metal skarn mineralization to Carlin-type gold mineralization at the Archimedes gold deposit, Eureka, Nevada. Masters thesis University of Nevada, Reno.
'Wolframite'
Formula: (Fe2+)WO4 to (Mn2+)WO4
Reference: NBMG Spec Pub 31 Minerals of Nevada
Wollastonite
Formula: CaSiO3
Reference: Hastings, M. H. (2008). Relationship of base-metal skarn mineralization to Carlin-type gold mineralization at the Archimedes gold deposit, Eureka, Nevada. Masters thesis University of Nevada, Reno.
Wulfenite
Formula: Pb(MoO4)
Reference: Rocks & Minerals, Nov. 1999

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Copper1.AA.05Cu
'Electrum'1.AA.05(Au, Ag)
Gold1.AA.05Au
Group 2 - Sulphides and Sulfosalts
Arsenopyrite2.EB.20FeAsS
Chalcopyrite2.CB.10aCuFeS2
Cinnabar2.CD.15aHgS
Covellite2.CA.05aCuS
Digenite2.BA.10Cu9S5
Galena2.CD.10PbS
Hawleyite2.CB.05aCdS
Marcasite2.EB.10aFeS2
Orpiment2.FA.30As2S3
Pyrite2.EB.05aFeS2
Realgar2.FA.15aAs4S4
Sphalerite2.CB.05aZnS
Tennantite2.GB.05Cu6[Cu4(Fe,Zn)2]As4S13
Tetrahedrite2.GB.05Cu6[Cu4(Fe,Zn)2]Sb4S13
Group 4 - Oxides and Hydroxides
Hematite4.CB.05Fe2O3
Massicot4.AC.25PbO
Quartz4.DA.05SiO2
var: Chalcedony4.DA.05SiO2
var: Jasper4.DA.05SiO2
Rutile4.DB.05TiO2
Group 5 - Nitrates and Carbonates
Aragonite5.AB.15CaCO3
Calcite5.AB.05CaCO3
Cerussite5.AB.15PbCO3
Leadhillite5.BF.40Pb4(CO3)2(SO4)(OH)2
Siderite5.AB.05FeCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Anglesite7.AD.35PbSO4
Baryte7.AD.35BaSO4
Jarosite7.BC.10KFe3+ 3(SO4)2(OH)6
Plumbojarosite7.BC.10Pb0.5Fe3+3(SO4)2(OH)6
Wulfenite7.GA.05Pb(MoO4)
Group 8 - Phosphates, Arsenates and Vanadates
Mimetite8.BN.05Pb5(AsO4)3Cl
Group 9 - Silicates
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Hemimorphite9.BD.10Zn4Si2O7(OH)2 · H2O
Kaolinite9.ED.05Al2(Si2O5)(OH)4
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
var: Illite9.EC.15K0.65Al2.0[Al0.65Si3.35O10](OH)2
var: Sericite9.EC.15KAl2(AlSi3O10)(OH)2
Stilpnomelane9.EG.40(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Wollastonite9.DG.05CaSiO3
Unclassified Minerals, Rocks, etc.
'Albite-Anorthite Series'-
'Andradite-Grossular Series'-
'Apatite'-Ca5(PO4)3(Cl/F/OH)
'Chlorite Group'-
'K Feldspar'-
'var: Adularia'-KAlSi3O8
'Limonite'-(Fe,O,OH,H2O)
'Pyroxene Group'-
'Scapolite'-
'Wolframite'-(Fe2+)WO4 to (Mn2+)WO4

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Copper1.1.1.3Cu
Gold1.1.1.1Au
Group 2 - SULFIDES
AmBnXp, with (m+n):p = 2:1
Digenite2.4.7.3Cu9S5
AmXp, with m:p = 1:1
Cinnabar2.8.14.1HgS
Covellite2.8.12.1CuS
Galena2.8.1.1PbS
Hawleyite2.8.2.6CdS
Realgar2.8.21.1As4S4
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 2:3
Orpiment2.11.1.1As2S3
AmBnXp, with (m+n):p = 1:2
Arsenopyrite2.12.4.1FeAsS
Marcasite2.12.2.1FeS2
Pyrite2.12.1.1FeS2
Group 3 - SULFOSALTS
3 <ø < 4
Tennantite3.3.6.2Cu6[Cu4(Fe,Zn)2]As4S13
Tetrahedrite3.3.6.1Cu6[Cu4(Fe,Zn)2]Sb4S13
Group 4 - SIMPLE OXIDES
AX
Massicot4.2.7.1PbO
A2X3
Hematite4.3.1.2Fe2O3
AX2
Rutile4.4.1.1TiO2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Cerussite14.1.3.4PbCO3
Siderite14.1.1.3FeCO3
Group 17 - COMPOUND CARBONATES
Miscellaneous
Leadhillite17.1.2.1Pb4(CO3)2(SO4)(OH)2
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Anglesite28.3.1.3PbSO4
Baryte28.3.1.1BaSO4
Group 30 - ANHYDROUS SULFATES CONTAINING HYDROXYL OR HALOGEN
(AB)2(XO4)Zq
Jarosite30.2.5.1KFe3+ 3(SO4)2(OH)6
Plumbojarosite30.2.5.6Pb0.5Fe3+3(SO4)2(OH)6
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A5(XO4)3Zq
Mimetite41.8.4.2Pb5(AsO4)3Cl
Group 48 - ANHYDROUS MOLYBDATES AND TUNGSTATES
AXO4
Wulfenite48.1.3.1Pb(MoO4)
Group 56 - SOROSILICATES Si2O7 Groups, With Additional O, OH, F and H2O
Si2O7 Groups and O, OH, F, and H2O with cations in [4] coordination
Hemimorphite56.1.2.1Zn4Si2O7(OH)2 · H2O
Group 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Epidote58.2.1a.7{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=3
Wollastonite65.2.1.1cCaSiO3
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
var: Illite71.2.2d.2K0.65Al2.0[Al0.65Si3.35O10](OH)2
Group 74 - PHYLLOSILICATES Modulated Layers
Modulated Layers with joined islands
Stilpnomelane74.1.1.1(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
'Albite-Anorthite Series'-
'Andradite-Grossular Series'-
'Apatite'-Ca5(PO4)3(Cl/F/OH)
Aragonite-CaCO3
'Chlorite Group'-
'Electrum'-(Au, Ag)
'K Feldspar'-
'var: Adularia'-KAlSi3O8
Kaolinite-Al2(Si2O5)(OH)4
'Limonite'-(Fe,O,OH,H2O)
Muscovite
var: Sericite
-KAl2(AlSi3O10)(OH)2
'Pyroxene Group'-
Quartz
var: Chalcedony
-SiO2
var: Jasper-SiO2
'Scapolite'-
'Wolframite'-(Fe2+)WO4 to (Mn2+)WO4

List of minerals for each chemical element

HHydrogen
H HemimorphiteZn4Si2O7(OH)2 · H2O
H LeadhillitePb4(CO3)2(SO4)(OH)2
H PlumbojarositePb0.5Fe33+(SO4)2(OH)6
H Limonite(Fe,O,OH,H2O)
H KaoliniteAl2(Si2O5)(OH)4
H Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
H ApatiteCa5(PO4)3(Cl/F/OH)
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H MuscoviteKAl2(AlSi3O10)(OH)2
H JarositeKFe3+ 3(SO4)2(OH)6
H Muscovite (var: Illite)K0.65Al2.0[Al0.65Si3.35O10](OH)2
H Stilpnomelane(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
CCarbon
C CerussitePbCO3
C LeadhillitePb4(CO3)2(SO4)(OH)2
C AragoniteCaCO3
C CalciteCaCO3
C SideriteFeCO3
OOxygen
O AnglesitePbSO4
O CerussitePbCO3
O HemimorphiteZn4Si2O7(OH)2 · H2O
O LeadhillitePb4(CO3)2(SO4)(OH)2
O WulfenitePb(MoO4)
O PlumbojarositePb0.5Fe33+(SO4)2(OH)6
O MimetitePb5(AsO4)3Cl
O AragoniteCaCO3
O CalciteCaCO3
O MassicotPbO
O Wolframite(Fe2+)WO4 to (Mn2+)WO4
O QuartzSiO2
O Limonite(Fe,O,OH,H2O)
O HematiteFe2O3
O BaryteBaSO4
O KaoliniteAl2(Si2O5)(OH)4
O Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
O ApatiteCa5(PO4)3(Cl/F/OH)
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O RutileTiO2
O MuscoviteKAl2(AlSi3O10)(OH)2
O JarositeKFe3+ 3(SO4)2(OH)6
O Quartz (var: Chalcedony)SiO2
O SideriteFeCO3
O Muscovite (var: Illite)K0.65Al2.0[Al0.65Si3.35O10](OH)2
O Stilpnomelane(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
O K Feldspar (var: Adularia)KAlSi3O8
O WollastoniteCaSiO3
FFluorine
F ApatiteCa5(PO4)3(Cl/F/OH)
NaSodium
Na Stilpnomelane(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
MgMagnesium
Mg Stilpnomelane(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
AlAluminium
Al KaoliniteAl2(Si2O5)(OH)4
Al Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al Muscovite (var: Illite)K0.65Al2.0[Al0.65Si3.35O10](OH)2
Al Stilpnomelane(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Al K Feldspar (var: Adularia)KAlSi3O8
SiSilicon
Si HemimorphiteZn4Si2O7(OH)2 · H2O
Si QuartzSiO2
Si KaoliniteAl2(Si2O5)(OH)4
Si Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si Quartz (var: Chalcedony)SiO2
Si Muscovite (var: Illite)K0.65Al2.0[Al0.65Si3.35O10](OH)2
Si Stilpnomelane(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Si K Feldspar (var: Adularia)KAlSi3O8
Si WollastoniteCaSiO3
PPhosphorus
P ApatiteCa5(PO4)3(Cl/F/OH)
SSulfur
S AnglesitePbSO4
S GalenaPbS
S HawleyiteCdS
S LeadhillitePb4(CO3)2(SO4)(OH)2
S SphaleriteZnS
S PlumbojarositePb0.5Fe33+(SO4)2(OH)6
S PyriteFeS2
S CinnabarHgS
S BaryteBaSO4
S MarcasiteFeS2
S OrpimentAs2S3
S RealgarAs4S4
S JarositeKFe3+ 3(SO4)2(OH)6
S ArsenopyriteFeAsS
S CovelliteCuS
S ChalcopyriteCuFeS2
S TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13
S TennantiteCu6[Cu4(Fe,Zn)2]As4S13
S DigeniteCu9S5
ClChlorine
Cl MimetitePb5(AsO4)3Cl
Cl ApatiteCa5(PO4)3(Cl/F/OH)
KPotassium
K Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
K MuscoviteKAl2(AlSi3O10)(OH)2
K JarositeKFe3+ 3(SO4)2(OH)6
K Muscovite (var: Illite)K0.65Al2.0[Al0.65Si3.35O10](OH)2
K Stilpnomelane(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
K K Feldspar (var: Adularia)KAlSi3O8
CaCalcium
Ca AragoniteCaCO3
Ca CalciteCaCO3
Ca ApatiteCa5(PO4)3(Cl/F/OH)
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ca Stilpnomelane(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Ca WollastoniteCaSiO3
TiTitanium
Ti RutileTiO2
MnManganese
Mn Wolframite(Fe2+)WO4 to (Mn2+)WO4
FeIron
Fe PlumbojarositePb0.5Fe33+(SO4)2(OH)6
Fe Wolframite(Fe2+)WO4 to (Mn2+)WO4
Fe Limonite(Fe,O,OH,H2O)
Fe HematiteFe2O3
Fe PyriteFeS2
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe MarcasiteFeS2
Fe JarositeKFe3+ 3(SO4)2(OH)6
Fe ArsenopyriteFeAsS
Fe SideriteFeCO3
Fe ChalcopyriteCuFeS2
Fe Stilpnomelane(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Fe TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13
CuCopper
Cu CopperCu
Cu CovelliteCuS
Cu ChalcopyriteCuFeS2
Cu TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13
Cu TennantiteCu6[Cu4(Fe,Zn)2]As4S13
Cu DigeniteCu9S5
ZnZinc
Zn HemimorphiteZn4Si2O7(OH)2 · H2O
Zn SphaleriteZnS
Zn TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13
AsArsenic
As MimetitePb5(AsO4)3Cl
As OrpimentAs2S3
As RealgarAs4S4
As ArsenopyriteFeAsS
As TennantiteCu6[Cu4(Fe,Zn)2]As4S13
MoMolybdenum
Mo WulfenitePb(MoO4)
AgSilver
Ag Electrum(Au, Ag)
CdCadmium
Cd HawleyiteCdS
SbAntimony
Sb TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13
BaBarium
Ba BaryteBaSO4
WTungsten
W Wolframite(Fe2+)WO4 to (Mn2+)WO4
AuGold
Au GoldAu
Au Electrum(Au, Ag)
HgMercury
Hg CinnabarHgS
PbLead
Pb AnglesitePbSO4
Pb CerussitePbCO3
Pb GalenaPbS
Pb LeadhillitePb4(CO3)2(SO4)(OH)2
Pb WulfenitePb(MoO4)
Pb PlumbojarositePb0.5Fe33+(SO4)2(OH)6
Pb MimetitePb5(AsO4)3Cl
Pb MassicotPbO

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Quaternary - Miocene
0 - 23.03 Ma



ID: 3185380
Cenozoic sedimentary rocks

Age: Cenozoic (0 - 23.03 Ma)

Lithology: Sedimentary rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Pleistocene - Pliocene
0.0117 - 5.333 Ma



ID: 2955516
Older alluvium and alluvial fan deposits

Age: Cenozoic (0.0117 - 5.333 Ma)

Description: Unit consists mostly of older alluvium and alluvial fans. It also includes various stream deposits, gravel, fanglomerates, and older gravels. It is not very consistent in description from county to county. This is used in all counties except Clark.

Comments: Original map source: Crafford, A.E.J., 2007, Geologic Map of Nevada: U.S. Geological Survey Data Series 249, 1 CD-ROM, 46 p., 1 plate; Scale 1:250,000.

Lithology: Major:{coarse alluvium,fine alluvium}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Dilles, P.A., Wright, W.A., Monteleone, S.E., Russell, K.D., Marlowe, K.E., Wood, R.A., and Margolis, J., (1996), The geology of the West Archimedes deposit: a new discovery in the Eureka mining district, Eureka County, Nevada, in Coyner, A.R., and Fahey, P.L., eds., Geology and Ore Deposits of the American Cordillera: Geological Society of Nevada Symposium Proceedings, 1995, Reno/Sparks, Nevada, v. 1, p. 159-171.
Russell, K., (1996), West Archimedes Gold Deposit, in Green, S.M., and Struhsacker, E., eds., Geology and Ore Deposits of the American Cordillera: Geological Society of Nevada Field Trip Guidebook Compendium, 1995, Reno/Sparks, NV, p. 316-319.
Sediment-hosted Gold Deposits of the Eureka (Ruby Hill Mine) and Gold Bar Districts, East-Central Nevada, Geological Society of Nevada Special Publication No., 27, (1998) Spring Field Trip Guidebook.
Mining Engineering, Dec., (1994), Society for Mining, Metallurgy, and Exploration, Littleton, Co, vol. 46, p. 1320.
Final Environmental Impact Statement for the Ruby Hill Project of Homestake Mining Company, January (1997).
Long, K.R., DeYoung, J.H., Jr., and Ludington, S.D., (1998), Significant deposits of gold, silver, copper, lead, and zinc in the United States: U.S. Geological Survey Open-File Report 90-206A, 33 p.; 98-206B. one 3.5 inch diskette.
Hastings, M. H. (2008). Relationship of base-metal skarn mineralization to Carlin-type gold mineralization at the Archimedes gold deposit, Eureka, Nevada. Masters thesis University of Nevada, Reno.

USGS MRDS Record:10310484

Localities in this Region
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