Old Democrat mine, Chief Mining District, Lincoln County, Nevada, USAi
| Regional Level Types | |
|---|---|
| Old Democrat mine | Mine |
| Chief Mining District | Mining District |
| Lincoln County | County |
| Nevada | State |
| USA | Country |
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Latitude & Longitude (WGS84):
37° 41' 37'' North , 114° 31' 26'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Other/historical names associated with this locality:
NBMG Sample Site 1443, Part of Comet Coalition Mines, Co, In 1949.
Sec 18 T3S R67E
Structure: N18w Fault Zone At 400 Ft From Portal.
Alteration: Intense Silicification
Commodity: Background radioactivity= 0.01 mr/hr; high= 0.03 mr/hr.
Deposit: At portal, limestone is altered to (or replaced by) gossany Fe and Mn oxides and silica. 2 or 3 gossany beds averaging 2-4 ft thick are exposed at portal. Replaced beds are dark grey to black and characterized by silicic Fe-mn boxworks, pockets of Fe-mn oxides and vugs of clear vitreous quartz. Portions of the altered rock are very strongly silicified. Replaced beds are darker in color than the original host which is a dark grey finely crystalline limestone displaying girvanella algal fossil casts. Sample 1443 from the dump consists of black siliceous Fe-mn rich replacement ore (gossan) which is quite heavy. The ore shows psilomelane on surfaces and contains finely crystalline galena, sphalerite and minor pyrite. Bright yellow oxides are present on some surfaces of samples. The gossan contains vugs filled with late calcite and quartz and shows some boxwork structures.
Deposit type: Polymetallic replacement
Development: Incline was driven As an exploration prospect by international smelting and refining co. Nerco was doing assessment work in the area in 1983.
Geology: Muddy brown micaceous siltstones and shales overlie the limestone locally. These rocks show some Fe-mn veining and bleaching effects. Limestone striking n-s, dip 8-15e.
Rock formation(s): Combined Metals Member Of Pioche Shale
Ore(s): Fractures; Gouge Zones
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
11 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:
| ⓘ Arseniosiderite Formula: Ca2Fe3+3(AsO4)3O2 · 3H2O |
| ⓘ Arsenopyrite Formula: FeAsS |
| ⓘ Beudantite Formula: PbFe3+3(AsO4)(SO4)(OH)6 |
| ⓘ Galena Formula: PbS |
| ⓘ Goethite Formula: Fe3+O(OH) |
| ⓘ Lepidocrocite Formula: Fe3+O(OH) |
| ⓘ Manganite Formula: Mn3+O(OH) |
| ⓘ 'Psilomelane' |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ Pyrolusite Formula: Mn4+O2 |
| ⓘ Scorodite Formula: Fe3+AsO4 · 2H2O |
| ⓘ Sphalerite Formula: ZnS |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Sphalerite | 2.CB.05a | ZnS |
| ⓘ | Galena | 2.CD.10 | PbS |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| ⓘ | Arsenopyrite | 2.EB.20 | FeAsS |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Goethite | 4.00. | Fe3+O(OH) |
| ⓘ | Pyrolusite | 4.DB.05 | Mn4+O2 |
| ⓘ | Manganite | 4.FD.15 | Mn3+O(OH) |
| ⓘ | Lepidocrocite | 4.FE.15 | Fe3+O(OH) |
| Group 8 - Phosphates, Arsenates and Vanadates | |||
| ⓘ | Beudantite | 8.BL.05 | PbFe3+3(AsO4)(SO4)(OH)6 |
| ⓘ | Scorodite | 8.CD.10 | Fe3+AsO4 · 2H2O |
| ⓘ | Arseniosiderite | 8.DH.30 | Ca2Fe3+3(AsO4)3O2 · 3H2O |
| Unclassified | |||
| ⓘ | 'Psilomelane' | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Arseniosiderite | Ca2Fe33+(AsO4)3O2 · 3H2O |
| H | ⓘ Beudantite | PbFe33+(AsO4)(SO4)(OH)6 |
| H | ⓘ Goethite | Fe3+O(OH) |
| H | ⓘ Lepidocrocite | Fe3+O(OH) |
| H | ⓘ Manganite | Mn3+O(OH) |
| H | ⓘ Scorodite | Fe3+AsO4 · 2H2O |
| O | Oxygen | |
| O | ⓘ Arseniosiderite | Ca2Fe33+(AsO4)3O2 · 3H2O |
| O | ⓘ Beudantite | PbFe33+(AsO4)(SO4)(OH)6 |
| O | ⓘ Goethite | Fe3+O(OH) |
| O | ⓘ Lepidocrocite | Fe3+O(OH) |
| O | ⓘ Manganite | Mn3+O(OH) |
| O | ⓘ Pyrolusite | Mn4+O2 |
| O | ⓘ Scorodite | Fe3+AsO4 · 2H2O |
| S | Sulfur | |
| S | ⓘ Arsenopyrite | FeAsS |
| S | ⓘ Beudantite | PbFe33+(AsO4)(SO4)(OH)6 |
| S | ⓘ Galena | PbS |
| S | ⓘ Pyrite | FeS2 |
| S | ⓘ Sphalerite | ZnS |
| Ca | Calcium | |
| Ca | ⓘ Arseniosiderite | Ca2Fe33+(AsO4)3O2 · 3H2O |
| Mn | Manganese | |
| Mn | ⓘ Manganite | Mn3+O(OH) |
| Mn | ⓘ Pyrolusite | Mn4+O2 |
| Fe | Iron | |
| Fe | ⓘ Arsenopyrite | FeAsS |
| Fe | ⓘ Arseniosiderite | Ca2Fe33+(AsO4)3O2 · 3H2O |
| Fe | ⓘ Beudantite | PbFe33+(AsO4)(SO4)(OH)6 |
| Fe | ⓘ Goethite | Fe3+O(OH) |
| Fe | ⓘ Lepidocrocite | Fe3+O(OH) |
| Fe | ⓘ Pyrite | FeS2 |
| Fe | ⓘ Scorodite | Fe3+AsO4 · 2H2O |
| Zn | Zinc | |
| Zn | ⓘ Sphalerite | ZnS |
| As | Arsenic | |
| As | ⓘ Arsenopyrite | FeAsS |
| As | ⓘ Arseniosiderite | Ca2Fe33+(AsO4)3O2 · 3H2O |
| As | ⓘ Beudantite | PbFe33+(AsO4)(SO4)(OH)6 |
| As | ⓘ Scorodite | Fe3+AsO4 · 2H2O |
| Pb | Lead | |
| Pb | ⓘ Beudantite | PbFe33+(AsO4)(SO4)(OH)6 |
| Pb | ⓘ Galena | PbS |
Other Databases
| Link to USGS MRDS: | 10037356 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Antler Foreland BasinBasin
- Basin and Range BasinsBasin
- Mojave DomainDomain
- Northern Basin and RangeWide Rift
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