Corona Mines (Vallejo Mines), Twin Peaks, Calistoga, Napa County, California, USAi
| Regional Level Types | |
|---|---|
| Corona Mines (Vallejo Mines) | Group of Mines |
| Twin Peaks | Group of Peaks |
| Calistoga | - not defined - |
| Napa County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
38° 40' 13'' North , 122° 32' 27'' West
Latitude & Longitude (decimal):
Type:
Group of Mines
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Calistoga | 5,330 (2017) | 10.7km |
| Middletown | 1,323 (2011) | 11.2km |
| Angwin | 3,051 (2011) | 13.2km |
| Hidden Valley Lake | 5,579 (2011) | 15.4km |
| Deer Park | 1,267 (2011) | 16.5km |
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
Local clubs are the best way to get access to collecting localities
| Club | Location | Distance |
|---|---|---|
| Santa Rosa Mineral And Gem Society, Inc. | Santa Rosa, California | 30km |
Mindat Locality ID:
83652
Long-form identifier:
mindat:1:2:83652:3
GUID (UUID V4):
effb97fc-c3c1-4f7d-9b8d-ff9ab59f4c8a
A former Hg mine complex located in secs. 32 & 33, T9N, R6W, MDM, 2.5 km (8,200 feet) NNW of Twin Peaks and about 6½ miles NNE of Calistoga. Discovered 1895. Production periods included: 1896-1905, 1911, 1916, and 1940-1944.
Mineralization is Hg deposits consisting of veins and veinlets of cinnabar with minor amounts of metacinnabar and native mercury occurring in Franciscan sandstone, shale of the Great Valley sequence, and serpentine deposits associated with fault structures and the borders of serpentine masses. The ore body strikes N65W, dips 45SW and is 22.86 meters wide. Pyrite is always a common accessory mineral.
Local structures include local thrusts and shearing of serpentine.
Workings include underground openings including a central adit and totaled 3,048 meters in length at 213.36 meters deep with a total length of 30.48 meters and an overall width of 15.24 meters.
Production data are found in: U.S. Bureau of Mines data. Production was more than 10 pounds Hg per ton (4,518 g/mt).
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:
| ⓘ Cinnabar Formula: HgS |
| ⓘ Coquimbite Formula: AlFe3(SO4)6(H2O)12 · 6H2O |
| ⓘ Dolomite Formula: CaMg(CO3)2 |
| ⓘ 'Limonite' |
| ⓘ Marcasite Formula: FeS2 |
| ⓘ Melanterite Formula: Fe2+(H2O)6SO4 · H2O |
| ⓘ Mercury Formula: Hg |
| ⓘ Metacinnabar Formula: HgS |
| ⓘ Opal Formula: SiO2 · nH2O |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ Römerite Formula: Fe2+Fe3+2(SO4)4 · 14H2O Colour: Light brown Description: Occurs as tiny crystals. |
| ⓘ Rozenite Formula: FeSO4 · 4H2O Colour: Pale blue-green Description: Occurs as a coating on black chert and silicified shale fragments. |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Mercury | 1.AD.05 | Hg |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Metacinnabar | 2.CB.05a | HgS |
| ⓘ | Cinnabar | 2.CD.15a | HgS |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| ⓘ | Marcasite | 2.EB.10a | FeS2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Opal | 4.DA.10 | SiO2 · nH2O |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Dolomite | 5.AB.10 | CaMg(CO3)2 |
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
| ⓘ | Rozenite | 7.CB.15 | FeSO4 · 4H2O |
| ⓘ | Melanterite | 7.CB.35 | Fe2+(H2O)6SO4 · H2O |
| ⓘ | Coquimbite | 7.CB.55 | AlFe3(SO4)6(H2O)12 · 6H2O |
| ⓘ | Römerite | 7.CB.75 | Fe2+Fe3+2(SO4)4 · 14H2O |
| Unclassified | |||
| ⓘ | 'Limonite' | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Coquimbite | AlFe3(SO4)6(H2O)12 · 6H2O |
| H | ⓘ Melanterite | Fe2+(H2O)6SO4 · H2O |
| H | ⓘ Opal | SiO2 · nH2O |
| H | ⓘ Römerite | Fe2+Fe23+(SO4)4 · 14H2O |
| H | ⓘ Rozenite | FeSO4 · 4H2O |
| C | Carbon | |
| C | ⓘ Dolomite | CaMg(CO3)2 |
| O | Oxygen | |
| O | ⓘ Coquimbite | AlFe3(SO4)6(H2O)12 · 6H2O |
| O | ⓘ Dolomite | CaMg(CO3)2 |
| O | ⓘ Melanterite | Fe2+(H2O)6SO4 · H2O |
| O | ⓘ Opal | SiO2 · nH2O |
| O | ⓘ Römerite | Fe2+Fe23+(SO4)4 · 14H2O |
| O | ⓘ Rozenite | FeSO4 · 4H2O |
| Mg | Magnesium | |
| Mg | ⓘ Dolomite | CaMg(CO3)2 |
| Al | Aluminium | |
| Al | ⓘ Coquimbite | AlFe3(SO4)6(H2O)12 · 6H2O |
| Si | Silicon | |
| Si | ⓘ Opal | SiO2 · nH2O |
| S | Sulfur | |
| S | ⓘ Cinnabar | HgS |
| S | ⓘ Coquimbite | AlFe3(SO4)6(H2O)12 · 6H2O |
| S | ⓘ Marcasite | FeS2 |
| S | ⓘ Melanterite | Fe2+(H2O)6SO4 · H2O |
| S | ⓘ Metacinnabar | HgS |
| S | ⓘ Pyrite | FeS2 |
| S | ⓘ Römerite | Fe2+Fe23+(SO4)4 · 14H2O |
| S | ⓘ Rozenite | FeSO4 · 4H2O |
| Ca | Calcium | |
| Ca | ⓘ Dolomite | CaMg(CO3)2 |
| Fe | Iron | |
| Fe | ⓘ Coquimbite | AlFe3(SO4)6(H2O)12 · 6H2O |
| Fe | ⓘ Marcasite | FeS2 |
| Fe | ⓘ Melanterite | Fe2+(H2O)6SO4 · H2O |
| Fe | ⓘ Pyrite | FeS2 |
| Fe | ⓘ Römerite | Fe2+Fe23+(SO4)4 · 14H2O |
| Fe | ⓘ Rozenite | FeSO4 · 4H2O |
| Hg | Mercury | |
| Hg | ⓘ Cinnabar | HgS |
| Hg | ⓘ Mercury | Hg |
| Hg | ⓘ Metacinnabar | HgS |
Other Databases
| Link to USGS MRDS: | 10040790 |
|---|
Other Regions, Features and Areas containing this locality
North America
- Coast MountainsMountain Range
North America PlateTectonic Plate
- Franciscan DomainDomain
USA
- California
- Mayacamas MountainsMountain Range
- Napa County
- Calistoga Mining District (Silverado Mining District)Mining District
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References
