Little Gem prospect (Cracker Jack prospect), Bullion Mining District, Lander County, Nevada, USAi
| Regional Level Types | |
|---|---|
| Little Gem prospect (Cracker Jack prospect) | Prospect |
| Bullion Mining District | Mining District |
| Lander County | County |
| Nevada | State |
| USA | Country |
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Latitude & Longitude (WGS84):
40° 19' 0'' North , 116° 41' 59'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Crescent Valley | 392 (2011) | 15.2km |
| Battle Mountain | 3,635 (2011) | 41.2km |
Sec 7 T28N R47E
Structure: Deposit In Upper Plate Of Roberts Mtn Thrust High Angle Basin & Range Period Faults, Normal Faults
Alteration: Country Rock Argillized Outwards From Stock
Deposit: Ore occurs in a fault-fissure vein the mine comprises one patented and three unpatented claims. A 50 ton flotation mill was constructed in 1937 but soon closed down due to metallurgical difficulties. Workings consist of a 435 foot deep inclined shaft and 1,500 feet of subsidiary tunnels. In 1908 18 carloads of ore yielded about $30 ton. ; info.src : 1 pub lit
Development: One patented and three unpatented claims: a 50-ton flotation mill was constructed in 1937 but soon closed down due to metallurgical difficulties
Geology: The ore occurs in a fault fissure vein composed largely of quartz & crushed country rock. The vein averages 4 feet in width, strikes E- W with a flat dip to the south. Most of production of several thousand tons has been from the oxidized zone. The sulphide zone appears 75 feet below the surface contains arsenopyrite, sphalerite, chalcopyrite, galena, and pyrite. The host rock is strongly sheeted parallel to the lode and argillized and sericitized near the lode. The orebody strikes an average of west and dips about 30s. The vein is from 1 to 6 feet wide and is a zone of closely spaced parallel sheets of quartz and sulphides. Since it was formed the vein has been crushed & shattered by movement parallel to the walls. It is crossed by several normal faults which do not appreciably offset the orebody (emmons, 1910).
Rock formation(s): Valmy Formation;Valmy Formation
Ore(s): Hydrothermal Channelways, Faults, Fissures, Breccias
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
9 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:
| ⓘ Bornite Formula: Cu5FeS4 |
| ⓘ Calcite Formula: CaCO3 |
| ⓘ Chalcopyrite Formula: CuFeS2 |
| ⓘ Chlorargyrite Formula: AgCl |
| ⓘ Galena Formula: PbS |
| ⓘ 'Limonite' |
| ⓘ Malachite Formula: Cu2(CO3)(OH)2 |
| ⓘ Native Gold Formula: Au |
| ⓘ Quartz Formula: SiO2 |
| ⓘ Turquoise Formula: CuAl6(PO4)4(OH)8 · 4H2O |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Bornite | 2.BA.15 | Cu5FeS4 |
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | Galena | 2.CD.10 | PbS |
| Group 3 - Halides | |||
| ⓘ | Chlorargyrite | 3.AA.15 | AgCl |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Calcite | 5.AB.05 | CaCO3 |
| ⓘ | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
| Group 8 - Phosphates, Arsenates and Vanadates | |||
| ⓘ | Turquoise | 8.DD.15 | CuAl6(PO4)4(OH)8 · 4H2O |
| Unclassified | |||
| ⓘ | 'Limonite' | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Malachite | Cu2(CO3)(OH)2 |
| H | ⓘ Turquoise | CuAl6(PO4)4(OH)8 · 4H2O |
| C | Carbon | |
| C | ⓘ Calcite | CaCO3 |
| C | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | Oxygen | |
| O | ⓘ Calcite | CaCO3 |
| O | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Turquoise | CuAl6(PO4)4(OH)8 · 4H2O |
| Al | Aluminium | |
| Al | ⓘ Turquoise | CuAl6(PO4)4(OH)8 · 4H2O |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| P | Phosphorus | |
| P | ⓘ Turquoise | CuAl6(PO4)4(OH)8 · 4H2O |
| S | Sulfur | |
| S | ⓘ Bornite | Cu5FeS4 |
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Galena | PbS |
| Cl | Chlorine | |
| Cl | ⓘ Chlorargyrite | AgCl |
| Ca | Calcium | |
| Ca | ⓘ Calcite | CaCO3 |
| Fe | Iron | |
| Fe | ⓘ Bornite | Cu5FeS4 |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Cu | Copper | |
| Cu | ⓘ Bornite | Cu5FeS4 |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| Cu | ⓘ Malachite | Cu2(CO3)(OH)2 |
| Cu | ⓘ Turquoise | CuAl6(PO4)4(OH)8 · 4H2O |
| Ag | Silver | |
| Ag | ⓘ Chlorargyrite | AgCl |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
| Pb | Lead | |
| Pb | ⓘ Galena | PbS |
Other Databases
| Link to USGS MRDS: | 10044891 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Basin and Range BasinsBasin
- Mojave DomainDomain
- Northern Basin and RangeWide Rift
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Little Gem prospect, Bullion Mining District, Lander County, Nevada, USA