Dexter mine (Tuscarora mine), Tuscarora Mining District, Elko County, Nevada, USAi
| Regional Level Types | |
|---|---|
| Dexter mine (Tuscarora mine) | Mine |
| Tuscarora Mining District | Mining District |
| Elko County | County |
| Nevada | State |
| USA | Country |
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Latitude & Longitude (WGS84):
41° 18' 43'' North , 116° 13' 24'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Elko | 20,279 (2017) | 65.8km |
Deposit: Old Ag mine (dexter) has been removed by the open pit (tusca- rora). Operations stopped march 1990. See tuscarora mine operations seq #0320070968
Geology: Gold mineralization occurs within high-grade vein fillings, blanket-like quartz stockwork bodies, and placer deposits within unconsolidated stream gravels. Data compiled from USBM files and company annual reports.
Structure: N.E. Striking normal faults, dipping NW
Alteration: Potassic alteration of bedded andesite
Commodity: Ore materials: native gold gangue materials: gangue: quartz, adularia, dickite, chlorite, titanium minerals
Deposit: Deposits are stockworks along fractures that trend eastward and dip north in adularized andesite. Zone contains many closely-spaced veinlets of quartz and adularia. Free gold is deposited in drusy cavities in the veinlets.
Deposit type: Epithermal vein, Comstock
Development: Large, low-grade gold deposit, discovered after the silver mines had been developed. It was worked until 1898, when the influx of water became too great
Geology: Geol.com: the deposits are stockworks along fractures that trend eastward and dip northward in adularized beaded andesite. The fracture zone is 1,400 ft long, 200 ft. Wide and was mined to a 300' depth. Zone contains many closely spaced veinlets of quartz and adularia. Free gold is deposited in drusy cavities in the veinlets and also replacing bedded andesite. Silver content so dispersed that very little secondary enrichment occurred
Ores(s): Fractures that trend eastward and dip northward in adularized beaded andesite. Shattered zones along contacts.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
7 valid minerals.
Rock Types Recorded
Note: data is currently VERY limited. Please bear with us while we work towards adding this information!
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
| ⓘ Acanthite Formula: Ag2S |
| ⓘ Argentojarosite Formula: AgFe3+3(SO4)2(OH)6 |
| ⓘ 'Chlorite Group' |
| ⓘ Dickite Formula: Al2(Si2O5)(OH)4 |
| ⓘ 'K Feldspar' |
| ⓘ 'K Feldspar var. Adularia' Formula: KAlSi3O8 |
| ⓘ Native Gold Formula: Au |
| ⓘ Native Silver Formula: Ag |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
| ⓘ | Native Silver | 1.AA.05 | Ag |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Acanthite | 2.BA.35 | Ag2S |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
| ⓘ | Argentojarosite | 7.BC.10 | AgFe3+3(SO4)2(OH)6 |
| Group 9 - Silicates | |||
| ⓘ | Dickite | 9.ED.05 | Al2(Si2O5)(OH)4 |
| Unclassified | |||
| ⓘ | 'K Feldspar var. Adularia' | - | KAlSi3O8 |
| ⓘ | 'Chlorite Group' | - | |
| ⓘ | 'K Feldspar' | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Argentojarosite | AgFe33+(SO4)2(OH)6 |
| H | ⓘ Dickite | Al2(Si2O5)(OH)4 |
| O | Oxygen | |
| O | ⓘ K Feldspar var. Adularia | KAlSi3O8 |
| O | ⓘ Argentojarosite | AgFe33+(SO4)2(OH)6 |
| O | ⓘ Dickite | Al2(Si2O5)(OH)4 |
| O | ⓘ Quartz | SiO2 |
| Al | Aluminium | |
| Al | ⓘ K Feldspar var. Adularia | KAlSi3O8 |
| Al | ⓘ Dickite | Al2(Si2O5)(OH)4 |
| Si | Silicon | |
| Si | ⓘ K Feldspar var. Adularia | KAlSi3O8 |
| Si | ⓘ Dickite | Al2(Si2O5)(OH)4 |
| Si | ⓘ Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Acanthite | Ag2S |
| S | ⓘ Argentojarosite | AgFe33+(SO4)2(OH)6 |
| S | ⓘ Pyrite | FeS2 |
| K | Potassium | |
| K | ⓘ K Feldspar var. Adularia | KAlSi3O8 |
| Fe | Iron | |
| Fe | ⓘ Argentojarosite | AgFe33+(SO4)2(OH)6 |
| Fe | ⓘ Pyrite | FeS2 |
| Ag | Silver | |
| Ag | ⓘ Acanthite | Ag2S |
| Ag | ⓘ Argentojarosite | AgFe33+(SO4)2(OH)6 |
| Ag | ⓘ Native Silver | Ag |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
Other Databases
| Link to USGS MRDS: | 10310536 |
|---|---|
| Link to USGS MRDS: | 10310536 |
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Antler Foreland BasinBasin
- Basin and Range BasinsBasin
- Copper–Bull Run–Elko–Indian Wells BasinBasin
- Mojave DomainDomain
- Northern Basin and RangeWide Rift
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