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Alum mine, Alum District, Esmeralda Co., Nevada, USAi
Regional Level Types
Alum mineMine
Alum DistrictMining District
Esmeralda Co.County

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Latitude & Longitude (WGS84): 37° 54' 27'' North , 117° 39' 58'' West
Latitude & Longitude (decimal): 37.90752,-117.66618
GeoHash:G#: 9qsrdky57
Locality type:Mine
Köppen climate type:BWk : Cold desert climate
Nearest Settlements:
Silver Peak107 (2011)17.2km
Tonopah2,478 (2011)42.1km
Goldfield268 (2011)43.8km
Dyer259 (2011)44.1km

Sec 28 T1N R39E. 11 miles north of Silver Peak.

Regions containing this locality

North America PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

7 valid minerals.

Detailed Mineral List:

Formula: KAl(SO4)2 · 12H2O
Reference: NBMG Spec. Pub. 31 Minerals of Nevada; Uwe Kolitsch (SXRD-analysis; confirmed ID); Nevada Bureau of Mines & Geology (1983), "A Mineral Inventory of the Esmeralda-Stateline Resource Area, Las Vegas District, Nevada," NBMG Open File Report 83-11
Formula: HgS
Reference: NBMG Spec. Pub. 31 Minerals of Nevada
Formula: CaSO4 · 2H2O
Reference: NBMG Spec. Pub. 31 Minerals of Nevada; Nevada Bureau of Mines & Geology (1983), "A Mineral Inventory of the Esmeralda-Stateline Resource Area, Las Vegas District, Nevada," NBMG Open File Report 83-11
Kalinite ?
Formula: KAl(SO4)2 · 11H2O
Reference: NBMG Spec. Pub. 31 Minerals of Nevada
Formula: MgAl2(SO4)4 · 22H2O
Reference: NBMG Spec. Pub. 31 Minerals of Nevada
Formula: K2Ca2Mg(SO4)4 · 2H2O
Reference: NBMG Spec. Pub. 31 Minerals of Nevada
Formula: S8
Reference: NBMG Spec. Pub. 31 Minerals of Nevada; Nevada Bureau of Mines & Geology (1983), "A Mineral Inventory of the Esmeralda-Stateline Resource Area, Las Vegas District, Nevada," NBMG Open File Report 83-11

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Group 2 - Sulphides and Sulfosalts
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Alum-(K)7.CC.20KAl(SO4)2 · 12H2O
Gypsum7.CD.40CaSO4 · 2H2O
Kalinite ?7.CC.15KAl(SO4)2 · 11H2O
Pickeringite7.CB.85MgAl2(SO4)4 · 22H2O
Polyhalite7.CC.65K2Ca2Mg(SO4)4 · 2H2O

List of minerals arranged by Dana 8th Edition classification

Semi-metals and non-metals
Group 2 - SULFIDES
AmXp, with m:p = 1:1
AmBn(XO4)p·xH2O, with (m+n):p < 3:2 and > 1:1
Polyhalite29.4.5.1K2Ca2Mg(SO4)4 · 2H2O
Alum-(K) · 12H2O
Kalinite ? · 11H2O
Gypsum29.6.3.1CaSO4 · 2H2O
Pickeringite29.7.3.1MgAl2(SO4)4 · 22H2O

List of minerals for each chemical element

H PolyhaliteK2Ca2Mg(SO4)4 · 2H2O
H GypsumCaSO4 · 2H2O
H PickeringiteMgAl2(SO4)4 · 22H2O
H Alum-(K)KAl(SO4)2 · 12H2O
H KaliniteKAl(SO4)2 · 11H2O
O PolyhaliteK2Ca2Mg(SO4)4 · 2H2O
O GypsumCaSO4 · 2H2O
O PickeringiteMgAl2(SO4)4 · 22H2O
O Alum-(K)KAl(SO4)2 · 12H2O
O KaliniteKAl(SO4)2 · 11H2O
Mg PolyhaliteK2Ca2Mg(SO4)4 · 2H2O
Mg PickeringiteMgAl2(SO4)4 · 22H2O
Al PickeringiteMgAl2(SO4)4 · 22H2O
Al Alum-(K)KAl(SO4)2 · 12H2O
Al KaliniteKAl(SO4)2 · 11H2O
S PolyhaliteK2Ca2Mg(SO4)4 · 2H2O
S CinnabarHgS
S SulphurS8
S GypsumCaSO4 · 2H2O
S PickeringiteMgAl2(SO4)4 · 22H2O
S Alum-(K)KAl(SO4)2 · 12H2O
S KaliniteKAl(SO4)2 · 11H2O
K PolyhaliteK2Ca2Mg(SO4)4 · 2H2O
K Alum-(K)KAl(SO4)2 · 12H2O
K KaliniteKAl(SO4)2 · 11H2O
Ca PolyhaliteK2Ca2Mg(SO4)4 · 2H2O
Ca GypsumCaSO4 · 2H2O
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

2.588 - 23.03 Ma

ID: 3186305
Cenozoic volcanic rocks

Age: Neogene (2.588 - 23.03 Ma)

Stratigraphic Name: Columbia River Basalt

Comments: Columbia Plateau

Lithology: Flood basalt(s); mafic volcanic rocks; basalt

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]

Pliocene - Miocene
2.588 - 23.03 Ma

ID: 3006363
Younger tuffaceous sedimentary rocks

Age: Neogene (2.588 - 23.03 Ma)

Stratigraphic Name: Horse Camp Formation; Esmeralda Formation; Belted Range Tuff; Timber Mountain Tuff; Paintbrush Tuff; Crater Flat Tuff; Muddy Creek Formation; Siebert Tuff

Description: Tuffaceous and other young Tertiary sedimentary rocks. Most of these rocks are sedimentary with a strong volcanic component - a few are tuffaceous with a strong sedimentary component. This unit includes rocks originally mapped as the High Rock sequence in Washoe County; the Horse Camp Formation in northern Nye County; the Esmeralda Formation in Mineral and Esmeralda Counties; older lake beds in Lincoln County; the Belted Range Tuff; the Indian Trail Formation (now abandoned); Timber Mountain, Paintbrush, and Crater Flat Tuffs; Wahmonie and Salyer Formations in southern Nye County; the Siebert Tuff in Esmeralda County; the Muddy Creek Formation in Clark County; and the Thousand Creek and Virgin Valley “beds” in Humboldt County; and other unnamed units. It corresponds to units Ts3 and Tts from the 1978 State map. It is present in all counties.

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:{sedimentary,volcanic}

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, used under Creative Commons Attribution 4.0 License

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