NBMG Sample Site 2611, Potosi Mining District, Osgood Mountains, Humboldt County, Nevada, USAi
Regional Level Types | |
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NBMG Sample Site 2611 | Occurrence |
Potosi Mining District | Mining District |
Osgood Mountains | Mountain Range |
Humboldt County | County |
Nevada | State |
USA | Country |
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Latitude & Longitude (WGS84):
41° 11' 39'' North , 117° 15' 20'' West
Latitude & Longitude (decimal):
Type:
KΓΆppen climate type:
Nearest Settlements:
Place | Population | Distance |
---|---|---|
Golconda | 214 (2011) | 33.2km |
Paradise Valley | 109 (2011) | 40.6km |
Winnemucca | 7,887 (2017) | 47.1km |
Mindat Locality ID:
429987
Long-form identifier:
mindat:1:2:429987:8
GUID (UUID V4):
08ae779f-6da9-4ce3-95f6-81fde863b6fd
Structure: Reg.Struct: Getchell Fault System Fault Along Range-Front; Ne-Trending Offset Fault
Alteration: Silicification, Bleaching
Deposit: Largest of the 3 tactite ore zones is the eastern one, a continuation of the riley tactite. The middle and western zones are thinner tactite bands formed in limestone units which lie down-section (west) of the riley limestone. The middle orebody was discovered underground and does not crop out at the surface. The western orebody was mined from the surface. The limestones dip 40-50e and the granodiorite contact is generally conformable to the strike and dip of the sediments. Pre-intrusive folding of the limestone into gentle, asymmetrical folds has resulted in a "scalloped" contact configuration, and the richest ore has formed where synclinal troughs intersect the contact forming embayments shaped like cone segments. To the east, down dip, the contact steepens and passes into hornfels which lies below the limestone, limiting the extent of the tactite to the east. One of the earliest tungsten properties developed in the area was riley. Getchell mine inc.'s underground mining, here at riley extension began in 1951; open pit on west orebody later. 3 tactite bodies. The eastern most of which is the northward continuation of the riley mine orebody. Riley and riley extension mines comprise the largest single tactite deposit in the district. Recent exploration (geologic mapping and drilling) defines areas containing approximately 186,000 tons of tungsten ore in the riley extension area. ; info.src : 1 pub lit; 2 unpub rept; 3 field observ
Deposit type: W skarn
Development: Recent work defines 186,000 tons ore in this area
Geology: 3 tactite zones; the east vein extends along the granodiorite contact for about 1600 ft, mined on both riley and riley extension properties. The main orebody was a tabular mass of tactite mined for approx. 800 ft. Down dip, averaging 10 ft. Thick. Preble formation limestone lenses in hornfels; most important is the 200-ft thick riley limestone, thin-bedded, with shaley partings.
Rock formation(s): Osgood Mtns Stock
Preble Formation;Preble Formation;Riley Limestone
Ore(s): 3 Tactite Zones Near Granodiorite Contact Pre-Stock, Ne-Trending Structure May Have Influenced Emplacement And Guided Mineralizing Fluids Of Reactive Limestones
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:
β Chalcopyrite Formula: CuFeS2 |
β Galena Formula: PbS |
β 'Garnet Group' Formula: X3Z2(SiO4)3 |
β Pyrite Formula: FeS2 |
β 'Pyroxene Group' Formula: ADSi2O6 |
β Pyrrhotite Formula: Fe1-xS |
β Scheelite Formula: Ca(WO4) |
β Sphalerite Formula: ZnS |
β Wollastonite Formula: Ca3(Si3O9) |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 2 - Sulphides and Sulfosalts | |||
---|---|---|---|
β | Sphalerite | 2.CB.05a | ZnS |
β | Chalcopyrite | 2.CB.10a | CuFeS2 |
β | Pyrrhotite | 2.CC.10 | Fe1-xS |
β | Galena | 2.CD.10 | PbS |
β | Pyrite | 2.EB.05a | FeS2 |
Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
β | Scheelite | 7.GA.05 | Ca(WO4) |
Group 9 - Silicates | |||
β | Wollastonite | 9.DG.05 | Ca3(Si3O9) |
Unclassified | |||
β | 'Pyroxene Group' | - | ADSi2O6 |
β | 'Garnet Group' | - | X3Z2(SiO4)3 |
List of minerals for each chemical element
O | Oxygen | |
---|---|---|
O | β Scheelite | Ca(WO4) |
O | β Wollastonite | Ca3(Si3O9) |
O | β Pyroxene Group | ADSi2O6 |
O | β Garnet Group | X3Z2(SiO4)3 |
Si | Silicon | |
Si | β Wollastonite | Ca3(Si3O9) |
Si | β Pyroxene Group | ADSi2O6 |
Si | β Garnet Group | X3Z2(SiO4)3 |
S | Sulfur | |
S | β Chalcopyrite | CuFeS2 |
S | β Galena | PbS |
S | β Pyrite | FeS2 |
S | β Pyrrhotite | Fe1-xS |
S | β Sphalerite | ZnS |
Ca | Calcium | |
Ca | β Scheelite | Ca(WO4) |
Ca | β Wollastonite | Ca3(Si3O9) |
Fe | Iron | |
Fe | β Chalcopyrite | CuFeS2 |
Fe | β Pyrite | FeS2 |
Fe | β Pyrrhotite | Fe1-xS |
Cu | Copper | |
Cu | β Chalcopyrite | CuFeS2 |
Zn | Zinc | |
Zn | β Sphalerite | ZnS |
W | Tungsten | |
W | β Scheelite | Ca(WO4) |
Pb | Lead | |
Pb | β Galena | PbS |
Other Databases
Link to USGS MRDS: | 10104002 |
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Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Basin and Range BasinsBasin
- Mojave DomainDomain
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