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Rain Mine, Carlin District, Elko Co., Nevada, USA

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Latitude & Longitude (WGS84): 40° 36' 47'' North , 116° 0' 39'' West
Latitude & Longitude (decimal): 40.61322,-116.01097
GeoHash:G#: 9rjx017mh
Locality type:Mine
Köppen climate type:BSk : Cold semi-arid (steppe) climate


Gnome orebody, B. J. Hill orebody, Snow Peak orebody, Northwest Extension orebody, Northwest Rain orebody, Saddle orebody, Tess orebody

Coordinates are to main Rain Mine area; the satellitic deposits extend for about two miles to the northwest and a mile and a half to the southeast for the main Rain pit along the Rain fault.

Structure: Three major fault zones controlled gold mineralization in the Rain subdistrict. The Rain fault zone is a N60?W-trending structural corridor that defines the Rain ?horst? and includes the Rain fault, the Dike fault, and the SB fault. The N30?Etrending Northeast fault zone truncated the Rain fault zone southeast of the Rain open pit. The Rain Fault strikes N50-70W, dips 70 degrees SW, and is a reverse fault southeast part of the Carlin Trend

Alteration: Silicification, baritization, argillization, leaching, oxidation. Silicification generally is restricted to major hydrothermal conduits and to the ore zone. There is an envelope of silicification slightly smaller than the mineralized zone. Hydrothermal barite forms an envelope constrained within the silicification envelope. Alunite, jarosite, and barite veins are prominent along northeast and northwest striking fractures both within the Rain Fault and peripheral to gold mineralization. Specular hematite and manganese oxides cover fracture surfaces. In some areas, sedimentary rocks are slightly calcareous and show liesegang banding.

Commodity: Ore Materials: gold Gangue Materials: barite, calcite, jarosite, hematite, silica, alunite, kaolinite, cinnabar, wavellite, dussertite, Mn oxides

Deposit: The main Rain orebody is a WNW-elongate zone, subparallel to and in the hanging wall of a N50-70W- striking high angle reverse fault, the Rain Fault. Rain satellitic deposits Rain NW, Tess, and Saddle extend for about two miles to the northwest along the Rain fault BJ Hill orebody extends about a mile a to the southeast of the main Rain pit along the Rain fault. The Gnome, SMZ, and South Peak orebodies are within about a mile to the south of the main Rain orebody. Gold ore in the Rain subdistrict developed along the unconformity between the Mississippian Webb Formation and the underlying Devonian Devils Gate Limestone. Hydrothermal breccia developed in thin-bedded to laminated mudstone of the middle to lower Webb Formation and collapse breccia in medium- to thick-bedded limestone of the upper Devils Gate Limestone that served as channelways for gold-bearing hydrothermal solutions. These breccias were exposed at the Rain open-pit deposit and extend underground for more than 3 miles (5 km) northwest of the open pit. Pipe-like breccia bodies, some containing higher-grade gold mineralization, developed within the Devils Gate Limestone below the collapse breccia zones. Sandstone of the Devonian Oxyoke Canyon Formation also hosts weak gold mineralization 1,400 feet (430 m) below the Rain open-pit deposit.

Deposit type: Sediment-hosted Au

Ore(s): The Rain Fault served as a conduit for mineralizing hydrothermal fluids. The basal Webb Formation immediately above the unconformable contact with Devils Gate Limestone served as a stratigraphic control.

Select Mineral List Type

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

32 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

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Alunite
Formula: KAl3(SO4)2(OH)6
Reference: NBMG Spec. Pub. 31 Minerals of Nevada; U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Anatase
Formula: TiO2
Reference: NBMG Spec. Pub. 31 Minerals of Nevada
'commodity:Arsenic'
Formula: As
Reference:  
Arseniosiderite
Formula: Ca2Fe3+3(AsO4)3O2 · 3H2O
Reference: NBMG Spec. Pub. 31 Minerals of Nevada
Arsenopyrite
Formula: FeAsS
Reference: NBMG Spec. Pub. 31 Minerals of Nevada
Baryte
Formula: BaSO4
Reference: NBMG Bull 106 Geology and Mineral Resources of Elko County, Nevada; 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; U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Cinnabar
Formula: HgS
Reference: NBMG Spec. Pub. 31 Minerals of Nevada; U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Crandallite
Formula: CaAl3(PO4)(PO3OH)(OH)6
Reference: NBMG Spec. Pub. 31 Minerals of Nevada
Dussertite
Formula: BaFe3+3(AsO4)(AsO3OH)(OH)6
Reference: NBMG Spec. Pub. 31 Minerals of Nevada; U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Faustite
Formula: (Zn,Cu)Al6(PO4)4(OH)8 · 4H2O
Reference: NBMG Spec. Pub. 31 Minerals of Nevada
Goethite
Formula: α-Fe3+O(OH)
Reference: NBMG Spec. Pub. 31 Minerals of Nevada
Gold
Formula: Au
Gold
Formula: Au
Reference: NBMG Bull 106 Geology and Mineral Resources of Elko County, Nevada; U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
'commodity:Gold'
Formula: Au
Reference:  
Gypsum
Formula: CaSO4 · 2H2O
Reference: NBMG Spec. Pub. 31 Minerals of Nevada
'Halloysite'
Formula: Al2(Si2O5)(OH)4
Reference: NBMG Spec. Pub. 31 Minerals of Nevada
Hematite
Formula: Fe2O3
Reference: NBMG Bull 106 Geology and Mineral Resources of Elko County, Nevada; U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Jarosite
Formula: KFe3+ 3(SO4)2(OH)6
Reference: NBMG Bull 106 Geology and Mineral Resources of Elko County, Nevada; U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Kaolinite
Formula: Al2(Si2O5)(OH)4
Reference: NBMG Spec. Pub. 31 Minerals of Nevada; U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Leucophosphite
Formula: KFe3+2(PO4)2(OH) · 2H2O
Reference: NBMG Spec. Pub. 31 Minerals of Nevada
'Limestone'
Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Lipscombite
Formula: Fe2+Fe3+2(PO4)2(OH)2
Reference: NBMG Spec. Pub. 31 Minerals of Nevada
Mansfieldite
Formula: AlAsO4 · 2H2O
Reference: NBMG Spec. Pub. 31 Minerals of Nevada
'commodity:Mercury'
Formula: Hg
Reference:  
Metavariscite
Formula: AlPO4 · 2H2O
Reference: NBMG Spec. Pub. 31 Minerals of Nevada
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: NBMG Spec. Pub. 31 Minerals of Nevada
Muscovite var: Illite
Formula: K0.65Al2.0[Al0.65Si3.35O10](OH)2
Reference: NBMG Spec. Pub. 31 Minerals of Nevada
Orpiment
Formula: As2S3
Reference: NBMG Spec. Pub. 31 Minerals of Nevada
Planerite
Formula: Al6(PO4)2(HPO4)2(OH)8 · 4 H2O
Reference: NBMG Spec. Pub. 31 Minerals of Nevada
Pyrite
Formula: FeS2
Reference: NBMG Spec. Pub. 31 Minerals of Nevada
Quartz
Formula: SiO2
Reference: NBMG Bull 106 Geology and Mineral Resources of Elko County, Nevada
Realgar
Formula: As4S4
Reference: NBMG Spec. Pub. 31 Minerals of Nevada
'Sandstone'
Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Scorodite
Formula: Fe3+AsO4 · 2H2O
Reference: NBMG Spec. Pub. 31 Minerals of Nevada
'Shale'
Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
'Silica'
Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
'Siltstone'
Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Sphalerite
Formula: ZnS
Reference: NBMG Spec. Pub. 31 Minerals of Nevada
Sulphur
Formula: S8
Reference: NBMG Spec. Pub. 31 Minerals of Nevada
Turquoise
Formula: Cu(Al,Fe3+)6(PO4)4(OH)8 · 4H2O
Reference: NBMG Spec Pub 31 Minerals of Nevada
Variscite
Formula: AlPO4 · 2H2O
Reference: NBMG Spec. Pub. 31 Minerals of Nevada
'Wad'
Reference: NBMG Bull 106 Geology and Mineral Resources of Elko County, Nevada
Wavellite
Formula: Al3(PO4)2(OH,F)3 · 5H2O
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
'Gold'1.AA.05Au
Sulphur1.CC.05S8
Group 2 - Sulphides and Sulfosalts
'Arsenopyrite'2.EB.20FeAsS
'Cinnabar'2.CD.15aHgS
Orpiment2.FA.30As2S3
Pyrite2.EB.05aFeS2
Realgar2.FA.15aAs4S4
Sphalerite2.CB.05aZnS
Group 4 - Oxides and Hydroxides
'Anatase'4.DD.05TiO2
'Goethite'4.00.α-Fe3+O(OH)
'Hematite'4.CB.05Fe2O3
Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
'Calcite'5.AB.05CaCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
'Alunite'7.BC.10KAl3(SO4)2(OH)6
'Baryte'7.AD.35BaSO4
'Gypsum'7.CD.40CaSO4 · 2H2O
Jarosite7.BC.10KFe3+ 3(SO4)2(OH)6
Group 8 - Phosphates, Arsenates and Vanadates
'Arseniosiderite'8.DH.30Ca2Fe3+3(AsO4)3O2 · 3H2O
'Crandallite'8.BL.10CaAl3(PO4)(PO3OH)(OH)6
'Dussertite'8.BL.10BaFe3+3(AsO4)(AsO3OH)(OH)6
'Faustite'8.DD.15(Zn,Cu)Al6(PO4)4(OH)8 · 4H2O
Leucophosphite8.DH.10KFe3+2(PO4)2(OH) · 2H2O
Lipscombite8.BB.90Fe2+Fe3+2(PO4)2(OH)2
Mansfieldite8.CD.10AlAsO4 · 2H2O
Metavariscite8.CD.05AlPO4 · 2H2O
Planerite8.DD.15Al6(PO4)2(HPO4)2(OH)8 · 4 H2O
Scorodite8.CD.10Fe3+AsO4 · 2H2O
Turquoise8.DD.15Cu(Al,Fe3+)6(PO4)4(OH)8 · 4H2O
Variscite8.CD.10AlPO4 · 2H2O
Wavellite8.DC.50Al3(PO4)2(OH,F)3 · 5H2O
Group 9 - Silicates
'Halloysite'9.ED.10Al2(Si2O5)(OH)4
Kaolinite9.ED.05Al2(Si2O5)(OH)4
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
var: Illite9.EC.15K0.65Al2.0[Al0.65Si3.35O10](OH)2
Unclassified Minerals, Rocks, etc.
Limestone-
Sandstone-
Shale-
Silica-
Siltstone-
Wad-

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Gold1.1.1.1Au
Semi-metals and non-metals
Sulphur1.3.5.1S8
Group 2 - SULFIDES
AmXp, with m:p = 1:1
Cinnabar2.8.14.1HgS
Realgar2.8.21.1As4S4
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 2:3
Orpiment2.11.1.1As2S3
AmBnXp, with (m+n):p = 1:2
Arsenopyrite2.12.4.1FeAsS
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
A2X3
Hematite4.3.1.2Fe2O3
AX2
Anatase4.4.4.1TiO2
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Goethite6.1.1.2α-Fe3+O(OH)
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Baryte28.3.1.1BaSO4
Group 29 - HYDRATED ACID AND NORMAL SULFATES
AXO4·xH2O
Gypsum29.6.3.1CaSO4 · 2H2O
Group 30 - ANHYDROUS SULFATES CONTAINING HYDROXYL OR HALOGEN
(AB)2(XO4)Zq
Alunite30.2.4.1KAl3(SO4)2(OH)6
Jarosite30.2.5.1KFe3+ 3(SO4)2(OH)6
Group 40 - HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
(AB)5(XO4)2·xH2O
Mansfieldite40.4.1.4AlAsO4 · 2H2O
Metavariscite40.4.3.1AlPO4 · 2H2O
Scorodite40.4.1.3Fe3+AsO4 · 2H2O
Variscite40.4.1.1AlPO4 · 2H2O
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
(AB)2(XO4)Zq
Dussertite41.5.10.1BaFe3+3(AsO4)(AsO3OH)(OH)6
(AB)3(XO4)2Zq
Lipscombite41.10.2.1Fe2+Fe3+2(PO4)2(OH)2
Group 42 - HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
(AB)2(XO4)Zq·xH2O
Crandallite42.7.3.1CaAl3(PO4)(PO3OH)(OH)6
(AB)5(XO4)3Zq·xH2O
Arseniosiderite42.8.4.3Ca2Fe3+3(AsO4)3O2 · 3H2O
(AB)7(XO4)4Zq·xH2O
Faustite42.9.3.3(Zn,Cu)Al6(PO4)4(OH)8 · 4H2O
Planerite42.9.3.6Al6(PO4)2(HPO4)2(OH)8 · 4 H2O
Turquoise42.9.3.1Cu(Al,Fe3+)6(PO4)4(OH)8 · 4H2O
A3(XO4)2Zq·xH2O
Wavellite42.10.2.1Al3(PO4)2(OH,F)3 · 5H2O
(AB)3(XO4)2Zq·xH2O
Leucophosphite42.11.6.1KFe3+2(PO4)2(OH) · 2H2O
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 1:1 layers
'Halloysite'71.1.1.4Al2(Si2O5)(OH)4
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 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Rocks, etc.
Kaolinite-Al2(Si2O5)(OH)4
'Limestone'-
'Sandstone'-
'Shale'-
'Silica'-
'Siltstone'-
'Wad'-

List of minerals for each chemical element

HHydrogen
H AluniteKAl3(SO4)2(OH)6
H ArseniosideriteCa2Fe33+(AsO4)3O2 · 3H2O
H CrandalliteCaAl3(PO4)(PO3OH)(OH)6
H DussertiteBaFe33+(AsO4)(AsO3OH)(OH)6
H Faustite(Zn,Cu)Al6(PO4)4(OH)8 · 4H2O
H Goethiteα-Fe3+O(OH)
H GypsumCaSO4 · 2H2O
H HalloysiteAl2(Si2O5)(OH)4
H Muscovite (var: Illite)K0.65Al2.0[Al0.65Si3.35O10](OH)2
H JarositeKFe3+ 3(SO4)2(OH)6
H KaoliniteAl2(Si2O5)(OH)4
H LeucophosphiteKFe23+(PO4)2(OH) · 2H2O
H LipscombiteFe2+Fe23+(PO4)2(OH)2
H MansfielditeAlAsO4 · 2H2O
H MetavarisciteAlPO4 · 2H2O
H MuscoviteKAl2(AlSi3O10)(OH)2
H PlaneriteAl6(PO4)2(HPO4)2(OH)8 · 4 H2O
H ScoroditeFe3+AsO4 · 2H2O
H TurquoiseCu(Al,Fe3+)6(PO4)4(OH)8 · 4H2O
H VarisciteAlPO4 · 2H2O
H WavelliteAl3(PO4)2(OH,F)3 · 5H2O
CCarbon
C CalciteCaCO3
OOxygen
O AluniteKAl3(SO4)2(OH)6
O AnataseTiO2
O ArseniosideriteCa2Fe33+(AsO4)3O2 · 3H2O
O BaryteBaSO4
O CalciteCaCO3
O CrandalliteCaAl3(PO4)(PO3OH)(OH)6
O DussertiteBaFe33+(AsO4)(AsO3OH)(OH)6
O Faustite(Zn,Cu)Al6(PO4)4(OH)8 · 4H2O
O Goethiteα-Fe3+O(OH)
O GypsumCaSO4 · 2H2O
O HalloysiteAl2(Si2O5)(OH)4
O HematiteFe2O3
O Muscovite (var: Illite)K0.65Al2.0[Al0.65Si3.35O10](OH)2
O JarositeKFe3+ 3(SO4)2(OH)6
O KaoliniteAl2(Si2O5)(OH)4
O LeucophosphiteKFe23+(PO4)2(OH) · 2H2O
O LipscombiteFe2+Fe23+(PO4)2(OH)2
O MansfielditeAlAsO4 · 2H2O
O MetavarisciteAlPO4 · 2H2O
O MuscoviteKAl2(AlSi3O10)(OH)2
O PlaneriteAl6(PO4)2(HPO4)2(OH)8 · 4 H2O
O QuartzSiO2
O ScoroditeFe3+AsO4 · 2H2O
O TurquoiseCu(Al,Fe3+)6(PO4)4(OH)8 · 4H2O
O VarisciteAlPO4 · 2H2O
O WavelliteAl3(PO4)2(OH,F)3 · 5H2O
AlAluminium
Al AluniteKAl3(SO4)2(OH)6
Al CrandalliteCaAl3(PO4)(PO3OH)(OH)6
Al Faustite(Zn,Cu)Al6(PO4)4(OH)8 · 4H2O
Al HalloysiteAl2(Si2O5)(OH)4
Al Muscovite (var: Illite)K0.65Al2.0[Al0.65Si3.35O10](OH)2
Al KaoliniteAl2(Si2O5)(OH)4
Al MansfielditeAlAsO4 · 2H2O
Al MetavarisciteAlPO4 · 2H2O
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al PlaneriteAl6(PO4)2(HPO4)2(OH)8 · 4 H2O
Al TurquoiseCu(Al,Fe3+)6(PO4)4(OH)8 · 4H2O
Al VarisciteAlPO4 · 2H2O
Al WavelliteAl3(PO4)2(OH,F)3 · 5H2O
SiSilicon
Si HalloysiteAl2(Si2O5)(OH)4
Si Muscovite (var: Illite)K0.65Al2.0[Al0.65Si3.35O10](OH)2
Si KaoliniteAl2(Si2O5)(OH)4
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si QuartzSiO2
PPhosphorus
P CrandalliteCaAl3(PO4)(PO3OH)(OH)6
P Faustite(Zn,Cu)Al6(PO4)4(OH)8 · 4H2O
P LeucophosphiteKFe23+(PO4)2(OH) · 2H2O
P LipscombiteFe2+Fe23+(PO4)2(OH)2
P MetavarisciteAlPO4 · 2H2O
P PlaneriteAl6(PO4)2(HPO4)2(OH)8 · 4 H2O
P TurquoiseCu(Al,Fe3+)6(PO4)4(OH)8 · 4H2O
P VarisciteAlPO4 · 2H2O
P WavelliteAl3(PO4)2(OH,F)3 · 5H2O
SSulfur
S AluniteKAl3(SO4)2(OH)6
S ArsenopyriteFeAsS
S BaryteBaSO4
S CinnabarHgS
S GypsumCaSO4 · 2H2O
S JarositeKFe3+ 3(SO4)2(OH)6
S OrpimentAs2S3
S PyriteFeS2
S RealgarAs4S4
S SphaleriteZnS
S SulphurS8
KPotassium
K AluniteKAl3(SO4)2(OH)6
K Muscovite (var: Illite)K0.65Al2.0[Al0.65Si3.35O10](OH)2
K JarositeKFe3+ 3(SO4)2(OH)6
K LeucophosphiteKFe23+(PO4)2(OH) · 2H2O
K MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Ca ArseniosideriteCa2Fe33+(AsO4)3O2 · 3H2O
Ca CalciteCaCO3
Ca CrandalliteCaAl3(PO4)(PO3OH)(OH)6
Ca GypsumCaSO4 · 2H2O
TiTitanium
Ti AnataseTiO2
FeIron
Fe ArseniosideriteCa2Fe33+(AsO4)3O2 · 3H2O
Fe ArsenopyriteFeAsS
Fe DussertiteBaFe33+(AsO4)(AsO3OH)(OH)6
Fe Goethiteα-Fe3+O(OH)
Fe HematiteFe2O3
Fe JarositeKFe3+ 3(SO4)2(OH)6
Fe LeucophosphiteKFe23+(PO4)2(OH) · 2H2O
Fe LipscombiteFe2+Fe23+(PO4)2(OH)2
Fe PyriteFeS2
Fe ScoroditeFe3+AsO4 · 2H2O
Fe TurquoiseCu(Al,Fe3+)6(PO4)4(OH)8 · 4H2O
CuCopper
Cu TurquoiseCu(Al,Fe3+)6(PO4)4(OH)8 · 4H2O
ZnZinc
Zn Faustite(Zn,Cu)Al6(PO4)4(OH)8 · 4H2O
Zn SphaleriteZnS
AsArsenic
As ArseniosideriteCa2Fe33+(AsO4)3O2 · 3H2O
As ArsenopyriteFeAsS
As DussertiteBaFe33+(AsO4)(AsO3OH)(OH)6
As MansfielditeAlAsO4 · 2H2O
As OrpimentAs2S3
As RealgarAs4S4
As ScoroditeFe3+AsO4 · 2H2O
BaBarium
Ba BaryteBaSO4
Ba DussertiteBaFe33+(AsO4)(AsO3OH)(OH)6
AuGold
Au GoldAu
HgMercury
Hg CinnabarHgS

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]

Early Mississippian - Devonian
346.7 - 419.2 Ma



ID: 2748546
Slope Assemblage - Shale, graywacke, siltstone, chert, conglomerate, and limestone

Age: Paleozoic (346.7 - 419.2 Ma)

Stratigraphic Name: Slaven Chert; Waterpipe Canyon Formation; Webb Formation; Woodruff Formation

Description: Carbonaceous shale, black chert and argillite, graywacke, chert-pebble conglomerate, and detrital limestone are the primary lithologies described from all of the rocks assigned to this unit, representing a mixed slope and basinal facies. On other maps these rocks have been included in a variety of units including the foreland basin and Devonian siliceous and transitional rocks. Mapping and new biostratigraphic data gathered in the last 30 years have shown that many of these rocks mapped only as Devonian also contain Early Mississippian fossils, thus making it difficult to distinguish them from known lithologically similar Lower Mississippian rocks. Although this unit is everywhere structurally bounded by faults, a stratigraphic link to older Slope assemblage rocks is possible. These rocks are imbricated with units DCs, IPMcl, OCc, Ocq, DSt, Dc, and MDcl. Whether there is a definable continuous Early Mississippian through Devonian sequence within this unit is unknown, but is suggested in the Carlin-Piñon Range (Smith and Ketner, 1978). The Slaven Chert first described in the Shoshone Range (Gilluly and Gates, 1965) is black chert with carbonaceous shale beds 4–10 feet thick, limy brown-weathering sandstone as much as four ft thick with coarse fragments of chert, shale, greenstone, limestone, graywacke, feldspathic siltstone, and brown-weathering limestone 2–20 ft thick, and contains Late Devonian radiolarians (Boundy-Sanders, Sandberg, and others, 1999). The Mississippian Waterpipe Canyon Formation is a similar formation with basal medium-grained graywacke with interlayered black, carbonaceous shale; chert-pebble conglomerate; and bedded chert grading upward into sandstone layers with black, well-rounded quartz and a black, pyritic, phosphate- and barite-bearing, argillaceous matrix interlayered with black, platy, quartz siltstone and fine-grained graywacke interbeds. It contains Early Mississippian radiolarians (Peters, Armstrong, and others, 2003). In the HD Range in northeastern Elko County, an undated, light-gray weathering, brittle, black shale, structurally underlies the other thrust sheets and was referred to as the Chainman Shale by Riva (1970), but is included here in unit MDst. In the Windermere Hills a fissile black argillite with sporadic interbeds of quartz-chert arenite is poorly exposed with variable dips suggesting a complex structure (Oversby, 1972). In the Cockalorum Wash quadrangle along the Eureka-Nye County boundary, a pale yellow-brown, organic-detrital limestone contains quartz and chert grains locally interbedded with and succeeded upward by light-colored siliceous mudstone, claystone, and siltstone. The basal limestone contains mixed Mississippian and Devonian faunas; a thin chert from a higher zone has Osagean radiolarians (Hose, 1983). In the northern Adobe Range, this unit is recognized as dark siliceous rocks consisting of shale, argillite, and bedded chert. They are faulted and folded with sparse collections of Kinderhookian and Famennian radiolarians and conodonts (Ketner and Ross, 1990). The Webb Formation in the Carlin-Piñon Range is a gray siliceous mudstone with black to gray, tan-weathering, dense limestone in lenses near the top (Smith and Ketner, 1978). The argillite of Lee Canyon is a black siliceous argillite with a little black chert and very little conglomerate and sandstone near the top (Smith and Ketner, 1978). In the Sulphur Spring Range, the Bruffey sequence (Carlisle and Nelson, 1990) is a black chert pebble to boulder conglomerate and well-bedded gritty limestone, chert and limestone conglomerate, gray limy shale, and minor sandstone. Smith and Ketner (1978) describe the same rocks as gray limestone, sandy limestone, chert, and chert-pebble conglomerate. The Woodruff Formation from the same area is described by Carlisle and Nelson (1990) as a gray fissile shale, dolomitic siltstone, and black and brown bedded chert. Smith and Ketner (1978) describe the Woodruff as dark gray to black siliceous mudstone and chert, with lesser amounts of shale, siltstone, dolomitic siltstone, dolomite, and limestone. In the Shoshone Range, pale-red to pale-brown weathering, platy, silty dolomite interbedded with black chert in the basal 50 ft of rocks referred to as the Pilot Shale by both Gilluly and Gates (1965) and Wrucke (1974) is included here. In the southern Independence Range, this unit consists of fine-grained limestone, bedded chert, shale, conglomerate, and prominent ledges of limy sandstone with Famennian and Frasnian (Late Devonian) conodonts (Ketner, 1998). In Welches Canyon northwest of Carlin, this unit is gray to black limestone, fine grained, and thin to thick bedded with common sand- and silt-size clasts of quartz and chert grains. It also contains pebbles and cobbles of chert, and interlayered chert and siliceous shale as much as 50 feet thick (Evans, 1974). In the Snake Mountains, the unit is dark carbonaceous limestone apparently overlain by a light-gray, siliceous platy siltstone. Other outcrops that belong with unit MDst, but are not mapped separately on a regional scale from Slope or Basin assemblage units DCs and DOts include the Pinecone sequence in the Toquima Range (Coles and Snyder, 1985), and gold-bearing chert (Theodore, T., oral commun., 2006) mapped informally as the “Rodeo Creek Formation” (Peters, 1997b) in the Carlin area.

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.

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

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Singer, D. A., Nevada Bureau of Mines Open-File Report 96-2, Ch 11

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