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Las Animas Placer District, Sierra County, New Mexico, USAi
| Regional Level Types | |
|---|---|
| Las Animas Placer District | Mining District |
| Sierra County | County |
| New Mexico | State |
| USA | Country |
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Latitude & Longitude (WGS84):
32° 57' 5'' North , 107° 30' 7'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Other/historical names associated with this locality:
Luxemburg Placers: Occurrences, Grayback Gulch, Hunkidori Gulch, Greenhorn Gulch, Slapjack Hill, Jones Hill, Gold Dust Placers: Occurrences, Gold Run Gulch, Little Gold Run Gulch: Other Occurrences, Dutch Gulch, Wicks Gulch, Rattlesnake Gulch, Bonanza Gulch
Structure: Fault With About 2,000 Ft Displacement Quartz Monzonite Porphyry And Mineralized Veins Occur 2 Mi East And Upstream From Placer Sites. A Caliche Layer Separates Gold-Bearing Gravels From Barren Gravels.
Alteration: Oxidation Of Auriferous Pyrite To Pseudomorphs Of Limonite Which Retain Gold Gives The Black Sand Concentrates A Commercial Value For Smelter Treatment.
Tectonics: Basin And Range
Deposit type: Placer Au-PGE
Rock formation(s): Santa Fe
Ore(s): Caliche Horizon Usually Separates Upper Part Of Fan Containing Andesite, Latite, Monzonite, And Gold Fragments From Lower Barren Part Of Fan Containing Rhyolite Fragments.
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
6 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:
| ⓘ 'Limonite' |
| ⓘ Magnetite Formula: Fe2+Fe3+2O4 |
| ⓘ Native Gold Formula: Au |
| ⓘ Native Osmium Formula: (Os,Ir,Ru) |
| ⓘ Native Osmium var. Iridosmine Formula: (Os,Ir) |
| ⓘ Native Silver Formula: Ag |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ Sklodowskite Formula: Mg(UO2)2(SiO3OH)2 · 6H2O References: |
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 |
| ⓘ | Native Osmium | 1.AF.05 | (Os,Ir,Ru) |
| ⓘ | var. Iridosmine | 1.AF.05 | (Os,Ir) |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
| Group 9 - Silicates | |||
| ⓘ | Sklodowskite | 9.AK.10 | Mg(UO2)2(SiO3OH)2 · 6H2O |
| Unclassified | |||
| ⓘ | 'Limonite' | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Sklodowskite | Mg(UO2)2(SiO3OH)2 · 6H2O |
| O | Oxygen | |
| O | ⓘ Magnetite | Fe2+Fe23+O4 |
| O | ⓘ Sklodowskite | Mg(UO2)2(SiO3OH)2 · 6H2O |
| Mg | Magnesium | |
| Mg | ⓘ Sklodowskite | Mg(UO2)2(SiO3OH)2 · 6H2O |
| Si | Silicon | |
| Si | ⓘ Sklodowskite | Mg(UO2)2(SiO3OH)2 · 6H2O |
| S | Sulfur | |
| S | ⓘ Pyrite | FeS2 |
| Fe | Iron | |
| Fe | ⓘ Magnetite | Fe2+Fe23+O4 |
| Fe | ⓘ Pyrite | FeS2 |
| Ru | Ruthenium | |
| Ru | ⓘ Native Osmium | (Os,Ir,Ru) |
| Ag | Silver | |
| Ag | ⓘ Native Silver | Ag |
| Os | Osmium | |
| Os | ⓘ Native Osmium | (Os,Ir,Ru) |
| Os | ⓘ Native Osmium var. Iridosmine | (Os,Ir) |
| Ir | Iridium | |
| Ir | ⓘ Native Osmium | (Os,Ir,Ru) |
| Ir | ⓘ Native Osmium var. Iridosmine | (Os,Ir) |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
| U | Uranium | |
| U | ⓘ Sklodowskite | Mg(UO2)2(SiO3OH)2 · 6H2O |
Other Databases
| Link to USGS MRDS: | 10038244 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Basin and Range BasinsBasin
- Mazatzal DomainDomain
- Southern Basin and RangeWide Rift
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References
Lindgren, Waldemar, Graton, L.C., Gordon, C.H. (1910) The ore deposits of New Mexico. Professional Paper 68. US Geological Survey doi:10.3133/pp68 pp.272-276
Las Animas Placer District, Sierra County, New Mexico, USA