Roberts mine, Varyville Mining District, Humboldt County, Nevada, USAi
| Regional Level Types | |
|---|---|
| Roberts mine | Mine |
| Varyville Mining District | Mining District |
| Humboldt County | County |
| Nevada | State |
| USA | Country |
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Latitude & Longitude (WGS84):
41° 33' 50'' North , 118° 48' 28'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Alteration: Silicification, Chloritization
Deposit: Copper mineralization associated with diorite dike which is in a fault zone. Country rock also diorite. Wide-spread copper oxides.; model name could also be: kuroko massive sulfide. Owned in 1960's by f.w. Roberts; explored by several surface cuts and two shallow underground workings. The USBM developed the property by diamond-drilling 7 holes in the shear zone adjacent to the fault. The property was probably discovered about the 1870's. Plats of the patented claims are dated july 10, 1883. In 1948, the wisby brothers built a road to the deposit, hand-sorted the ore, and shipped it in nov. 1948 (46 tons at 2.83 % cu 0.005oz au, 1.875 oz ag. A second shipment of 4.2 tons hand-sorted ore was made july 27, 1949 (7.5 % cu, 0.01 oz au, 3.3 oz ag. Property consists of 4 claims, patented in 1883 (ne plus ultra, chancery, matchbox, and vulcan claims.) and one unpatented claim(the cove meadow) ; info.src : 1 pub lit; 2 unpub rept; 3 field observ discovery year: 1870's
Deposit type: Polymetallic veins
Development: Hand-sorted ore shipped in 1948 and 1949
Geology: Shear zone ranges from 3 to 35 ft thick and several thousands of feet long; schistose property consists of a 4 claims, patented in 1883 (ne plus ultra, chancery, matchbox, and vulcan claims.) and one unpatented claim(the cove meadow)
Rock formation(s): Happy Creek Volcanic Series
Ore(s): Shear Zone; Parallel Fractures; Brecciation
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
5 valid minerals.
Rock Types Recorded
Note: data is currently VERY limited. Please bear with us while we work towards adding this information!
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Alphabetical List Tree DiagramDetailed Mineral List:
| ⓘ Chrysocolla Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| ⓘ Copper Formula: Cu |
| ⓘ Cuprite Formula: Cu2O |
| ⓘ 'Limonite' |
| ⓘ Magnetite Formula: Fe2+Fe3+2O4 |
| ⓘ Malachite Formula: Cu2(CO3)(OH)2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Copper | 1.AA.05 | Cu |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Cuprite | 4.AA.10 | Cu2O |
| ⓘ | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
| Group 9 - Silicates | |||
| ⓘ | Chrysocolla | 9.ED.20 | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Unclassified | |||
| ⓘ | 'Limonite' | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| H | ⓘ Malachite | Cu2(CO3)(OH)2 |
| C | Carbon | |
| C | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | Oxygen | |
| O | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| O | ⓘ Cuprite | Cu2O |
| O | ⓘ Magnetite | Fe2+Fe23+O4 |
| O | ⓘ Malachite | Cu2(CO3)(OH)2 |
| Al | Aluminium | |
| Al | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Si | Silicon | |
| Si | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Fe | Iron | |
| Fe | ⓘ Magnetite | Fe2+Fe23+O4 |
| Cu | Copper | |
| Cu | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Cu | ⓘ Cuprite | Cu2O |
| Cu | ⓘ Copper | Cu |
| Cu | ⓘ Malachite | Cu2(CO3)(OH)2 |
Other Databases
| Link to USGS MRDS: | 10045037 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Havallah BasinBasin
- Northern Basin and RangeWide Rift
- Shoofly-Olds Ferry DomainDomain
- Southeast Oregon–Northern California BasinsBasin
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