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Mayday Mine, Anvil Mountain, Silverton, Animas District, San Juan Co., Colorado, USA

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Latitude & Longitude (WGS84): 37° 50' 4'' North , 107° 40' 41'' West
Latitude & Longitude (decimal): 37.83444,-107.67806
GeoHash:G#: 9werjxx1x
Locality type:Mine
Köppen climate type:Dfc : Subarctic climate


A former W-Zn-Pb mine located 2.6 km (8,500 feet) E of Anvil Mountain (coordinates of record) (base of NE slope, along Cement Creek), and 2.8 km (9,100 feet) NNW of Silverton.

Mineralization is a vein deposit.

Regions containing this locality

Rocky Mountains, North America

Mountain Range - 2,059 mineral species & varietal names listed

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


10 valid minerals.

Detailed Mineral List:

Anglesite
Formula: PbSO4
Reference: Mark R. Stanton (2000) The Role of Weathering in Trace Metal Distributions in Subsurface Samples from the Mayday Mine Dump nearSilverton, Colorado. Proceedings from the Fifth International Conference on Acid Rock Drainage published by the Society for Mining, Metallurgy, and Exploration Inc., Littleton, Colorado. pp1501-1509
Cerussite
Formula: PbCO3
Reference: Mark R. Stanton (2000) The Role of Weathering in Trace Metal Distributions in Subsurface Samples from the Mayday Mine Dump nearSilverton, Colorado. Proceedings from the Fifth International Conference on Acid Rock Drainage published by the Society for Mining, Metallurgy, and Exploration Inc., Littleton, Colorado. pp1501-1509
Galena
Formula: PbS
Reference: Mark R. Stanton (2000) The Role of Weathering in Trace Metal Distributions in Subsurface Samples from the Mayday Mine Dump nearSilverton, Colorado. Proceedings from the Fifth International Conference on Acid Rock Drainage published by the Society for Mining, Metallurgy, and Exploration Inc., Littleton, Colorado. pp1501-1509
Gypsum
Formula: CaSO4 · 2H2O
Reference: Mark R. Stanton (2000) The Role of Weathering in Trace Metal Distributions in Subsurface Samples from the Mayday Mine Dump nearSilverton, Colorado. Proceedings from the Fifth International Conference on Acid Rock Drainage published by the Society for Mining, Metallurgy, and Exploration Inc., Littleton, Colorado. pp1501-1509
Hübnerite
Formula: MnWO4
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Jarosite
Formula: KFe3+ 3(SO4)2(OH)6
Reference: Mark R. Stanton (2000) The Role of Weathering in Trace Metal Distributions in Subsurface Samples from the Mayday Mine Dump nearSilverton, Colorado. Proceedings from the Fifth International Conference on Acid Rock Drainage published by the Society for Mining, Metallurgy, and Exploration Inc., Littleton, Colorado. pp1501-1509
'Limonite'
Formula: (Fe,O,OH,H2O)
Reference: Mark R. Stanton (2000) The Role of Weathering in Trace Metal Distributions in Subsurface Samples from the Mayday Mine Dump nearSilverton, Colorado. Proceedings from the Fifth International Conference on Acid Rock Drainage published by the Society for Mining, Metallurgy, and Exploration Inc., Littleton, Colorado. pp1501-1509
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Mark R. Stanton (2000) The Role of Weathering in Trace Metal Distributions in Subsurface Samples from the Mayday Mine Dump nearSilverton, Colorado. Proceedings from the Fifth International Conference on Acid Rock Drainage published by the Society for Mining, Metallurgy, and Exploration Inc., Littleton, Colorado. pp1501-1509
Plumbojarosite
Formula: Pb0.5Fe3+3(SO4)2(OH)6
Reference: Mark R. Stanton (2000) The Role of Weathering in Trace Metal Distributions in Subsurface Samples from the Mayday Mine Dump nearSilverton, Colorado. Proceedings from the Fifth International Conference on Acid Rock Drainage published by the Society for Mining, Metallurgy, and Exploration Inc., Littleton, Colorado. pp1501-1509
Quartz
Formula: SiO2
Reference: Mark R. Stanton (2000) The Role of Weathering in Trace Metal Distributions in Subsurface Samples from the Mayday Mine Dump nearSilverton, Colorado. Proceedings from the Fifth International Conference on Acid Rock Drainage published by the Society for Mining, Metallurgy, and Exploration Inc., Littleton, Colorado. pp1501-1509
Sphalerite
Formula: ZnS
Reference: Mark R. Stanton (2000) The Role of Weathering in Trace Metal Distributions in Subsurface Samples from the Mayday Mine Dump nearSilverton, Colorado. Proceedings from the Fifth International Conference on Acid Rock Drainage published by the Society for Mining, Metallurgy, and Exploration Inc., Littleton, Colorado. pp1501-1509
'Wad'
Reference: Mark R. Stanton (2000) The Role of Weathering in Trace Metal Distributions in Subsurface Samples from the Mayday Mine Dump nearSilverton, Colorado. Proceedings from the Fifth International Conference on Acid Rock Drainage published by the Society for Mining, Metallurgy, and Exploration Inc., Littleton, Colorado. pp1501-1509

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
'Galena'2.CD.10PbS
'Sphalerite'2.CB.05aZnS
Group 4 - Oxides and Hydroxides
'Hübnerite'4.DB.30MnWO4
'Quartz'4.DA.05SiO2
Group 5 - Nitrates and Carbonates
'Cerussite'5.AB.15PbCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
'Anglesite'7.AD.35PbSO4
'Gypsum'7.CD.40CaSO4 · 2H2O
'Jarosite'7.BC.10KFe3+ 3(SO4)2(OH)6
'Plumbojarosite'7.BC.10Pb0.5Fe3+3(SO4)2(OH)6
Group 9 - Silicates
'Muscovite'9.EC.15KAl2(AlSi3O10)(OH)2
Unclassified Minerals, Rocks, etc.
'Limonite'-(Fe,O,OH,H2O)
'Wad'-

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
Sphalerite2.8.2.1ZnS
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Cerussite14.1.3.4PbCO3
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Anglesite28.3.1.3PbSO4
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
Jarosite30.2.5.1KFe3+ 3(SO4)2(OH)6
Plumbojarosite30.2.5.6Pb0.5Fe3+3(SO4)2(OH)6
Group 48 - ANHYDROUS MOLYBDATES AND TUNGSTATES
AXO4
Hübnerite48.1.1.1MnWO4
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Rocks, etc.
'Limonite'-(Fe,O,OH,H2O)
'Wad'-

List of minerals for each chemical element

HHydrogen
H GypsumCaSO4 · 2H2O
H JarositeKFe3+ 3(SO4)2(OH)6
H Limonite(Fe,O,OH,H2O)
H MuscoviteKAl2(AlSi3O10)(OH)2
H PlumbojarositePb0.5Fe33+(SO4)2(OH)6
CCarbon
C CerussitePbCO3
OOxygen
O AnglesitePbSO4
O CerussitePbCO3
O GypsumCaSO4 · 2H2O
O HübneriteMnWO4
O JarositeKFe3+ 3(SO4)2(OH)6
O Limonite(Fe,O,OH,H2O)
O MuscoviteKAl2(AlSi3O10)(OH)2
O PlumbojarositePb0.5Fe33+(SO4)2(OH)6
O QuartzSiO2
AlAluminium
Al MuscoviteKAl2(AlSi3O10)(OH)2
SiSilicon
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si QuartzSiO2
SSulfur
S AnglesitePbSO4
S GalenaPbS
S GypsumCaSO4 · 2H2O
S JarositeKFe3+ 3(SO4)2(OH)6
S PlumbojarositePb0.5Fe33+(SO4)2(OH)6
S SphaleriteZnS
KPotassium
K JarositeKFe3+ 3(SO4)2(OH)6
K MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Ca GypsumCaSO4 · 2H2O
MnManganese
Mn HübneriteMnWO4
FeIron
Fe JarositeKFe3+ 3(SO4)2(OH)6
Fe Limonite(Fe,O,OH,H2O)
Fe PlumbojarositePb0.5Fe33+(SO4)2(OH)6
ZnZinc
Zn SphaleriteZnS
WTungsten
W HübneriteMnWO4
PbLead
Pb AnglesitePbSO4
Pb CerussitePbCO3
Pb GalenaPbS
Pb PlumbojarositePb0.5Fe33+(SO4)2(OH)6

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

Miocene - Eocene
5.333 - 56 Ma



ID: 3190650
Cenozoic volcanic rocks

Age: Cenozoic (5.333 - 56 Ma)

Stratigraphic Name: San Juan Mountains

Comments: Southern Rocky Mountains

Lithology: Intermediate-felsic volcanic 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]

Oligocene
23.03 - 33.9 Ma



ID: 2813930
Intra-ash flow andesitic lavas

Age: Oligocene (23.03 - 33.9 Ma)

Comments: Original map source: Green, G.N., 1992, The Digital Geologic Map of Colorado in ARC/INFO Format: U.S. Geological Survey Open-File Report 92-0507, 9 p., scale 1:500,000.

Lithology: Major:{andesite}

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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Year (asc) Year (desc) Author (A-Z) Author (Z-A)
USBM MIN. EXAM. FILE
CONSV. DIV. COMP. DATE, 9,65.


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