Mag Deposit, Humboldt County, Nevada, USAi
| Regional Level Types | |
|---|---|
| Mag Deposit | Mine |
| Humboldt County | County |
| Nevada | State |
| USA | Country |
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Latitude & Longitude (WGS84):
41° 8' 19'' North , 117° 15' 8'' West
Latitude & Longitude (decimal):
Locality type:
KΓΆppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Golconda | 214 (2011) | 28.6km |
| Winnemucca | 7,887 (2017) | 44.5km |
| Paradise Valley | 109 (2011) | 45.9km |
| Battle Mountain | 3,635 (2011) | 61.3km |
Structure: Two Orientations Of Extensional Faulting Are Recognized. The Dominant Trend Strikes N-S To N30w, Dips 40-65 East, And Mimics The Strike Of The Orebody. The Second Strikes N30-60e, Dips 50-65 Se, And Offsets Quaternary Alluvium.
Alteration: Hypogene Decalcification, Leaching, Silicification, Kaolinization Are Spatially Associated With Ore. Supergene Weathering Of Pyrite To A Depth Of 200 Ft. Calcite Veining Common Only In Massive, Unmineralized Limestone. Jasperoids Formed Coeval With Au Deposition, But Botryoidal, Chalcedonic Silica Is Younger Than Au Deposition.
Commodity: Au correlates strongly with hg, tl, and as. Au correlates weakly with ba, zn, and f. Au does not correlate with co, cu, mo, ni, pb.
Deposit: Deposit thickens from 200 ft. In north-northwest to 400 ft. In south-southeast.
Deposit type: Carbonate-hosted Au-Ag
Development: The deposit was concealed by alluvium. In 1971, a soil sampling survey detected elevated hg over mag, but magnetic and vlf-em surveys gave unclear results. Two holes were drilled near mag in 1972 As stepouts along strike from the pinson a orebody. One of these holes intersected minor Au mineralization. Additional drilling in the 1970's was completed for claim assessments. In 1978, one of these holes intersected significant low grade au, but was not considered adequate for immediate follow-up drilling. In may, 1984, stepout drilling discovered the mag deposit along the pinson trend at the intersection with n-n W striking carbonate rocks. ; econ.com: mill uses carbon-in-pulp process at a rate of 1500 tons per day. Mill recoveries of 88% in 1989; recoveries will decline As carbonaceous and sulfide-bearing ore is encountered with depth.
Rock formation(s): Comus Formation
Ore(s): Ne And Nw Striking Extensional Faults Are Structural Controls. Calcareous Argillite And Shale Of The Comus Formation Are The Stratigraphic Controls.
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
15 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 Baryte Formula: BaSO4 Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
| β Bournonite Formula: PbCuSbS3 Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
| β Chalcopyrite Formula: CuFeS2 Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
| β Cinnabar Formula: HgS Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
| β Copper Formula: Cu Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
| β Covellite Formula: CuS Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
| β Famatinite Formula: Cu3SbS4 Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
| β Galena Formula: PbS Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
| β Geocronite Formula: Pb14Sb6S23 Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
| β Marcasite Formula: FeS2 Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
| β Pyrite Formula: FeS2 Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
| β Quartz Formula: SiO2 Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
| β Realgar Formula: As4S4 Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
| β Sphalerite Formula: ZnS Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
| β Stibnite Formula: Sb2S3 Reference: U.S. Geological Survey (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| β | Copper | 1.AA.05 | Cu |
| Group 2 - Sulphides and Sulfosalts | |||
| β | Bournonite | 2.GA.50 | PbCuSbS3 |
| β | Chalcopyrite | 2.CB.10a | CuFeS2 |
| β | Cinnabar | 2.CD.15a | HgS |
| β | Covellite | 2.CA.05a | CuS |
| β | Famatinite | 2.KA.10 | Cu3SbS4 |
| β | Galena | 2.CD.10 | PbS |
| β | Geocronite | 2.JB.30a | Pb14Sb6S23 |
| β | Marcasite | 2.EB.10a | FeS2 |
| β | Pyrite | 2.EB.05a | FeS2 |
| β | Realgar | 2.FA.15a | As4S4 |
| β | Sphalerite | 2.CB.05a | ZnS |
| β | Stibnite | 2.DB.05 | Sb2S3 |
| Group 4 - Oxides and Hydroxides | |||
| β | Quartz | 4.DA.05 | SiO2 |
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
| β | Baryte | 7.AD.35 | BaSO4 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | β Baryte | BaSO4 |
| O | β Quartz | SiO2 |
| Si | Silicon | |
| Si | β Quartz | SiO2 |
| S | Sulfur | |
| S | β Baryte | BaSO4 |
| S | β Bournonite | PbCuSbS3 |
| S | β Chalcopyrite | CuFeS2 |
| S | β Cinnabar | HgS |
| S | β Covellite | CuS |
| S | β Famatinite | Cu3SbS4 |
| S | β Galena | PbS |
| S | β Geocronite | Pb14Sb6S23 |
| S | β Marcasite | FeS2 |
| S | β Pyrite | FeS2 |
| S | β Realgar | As4S4 |
| S | β Sphalerite | ZnS |
| S | β Stibnite | Sb2S3 |
| Fe | Iron | |
| Fe | β Chalcopyrite | CuFeS2 |
| Fe | β Marcasite | FeS2 |
| Fe | β Pyrite | FeS2 |
| Cu | Copper | |
| Cu | β Bournonite | PbCuSbS3 |
| Cu | β Chalcopyrite | CuFeS2 |
| Cu | β Copper | Cu |
| Cu | β Covellite | CuS |
| Cu | β Famatinite | Cu3SbS4 |
| Zn | Zinc | |
| Zn | β Sphalerite | ZnS |
| As | Arsenic | |
| As | β Realgar | As4S4 |
| Sb | Antimony | |
| Sb | β Bournonite | PbCuSbS3 |
| Sb | β Famatinite | Cu3SbS4 |
| Sb | β Geocronite | Pb14Sb6S23 |
| Sb | β Stibnite | Sb2S3 |
| Ba | Barium | |
| Ba | β Baryte | BaSO4 |
| Hg | Mercury | |
| Hg | β Cinnabar | HgS |
| Pb | Lead | |
| Pb | β Bournonite | PbCuSbS3 |
| Pb | β Galena | PbS |
| Pb | β Geocronite | Pb14Sb6S23 |
References
Sort by
Year (asc) Year (desc) Author (A-Z) Author (Z-A)Foster, J.M., and Kretschmer, E.L., (1991), Geology of the Mag Deposit, Pinson Mine, Humboldt County, Nevada, in Raines, G.L., Et Al, Eds., Geology and Ore Deposits of the Great Basin, the Geological Society of Nevada, Reno, P. 845-856
Other Databases
| Link to USGS MRDS: | 10055089 |
|---|
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