Ralston Divide Mining District, Placer County, California, USAi
| Regional Level Types | |
|---|---|
| Ralston Divide Mining District | Mining District |
| Placer County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
39° North , 120° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~76km
Type:
Köppen climate type:
Location: This is a placer-gold district in southeastern Placer County, 25 miles east of Forest Hill. It is an extensive region that includes the Ralston Ridge, Long Canyon, and Nevada Point Ridge areas. It is just south of the Duncan Peak district.
Geology: The deposits are along a west- and southwest-trending Tertiary gravel channel known as the Long Canyon channel, the eastward continuation of the main Michigan Bluff-Forest Hill channel. The gravels are interbedded with rhyolite tuffs and contain granitic boulders. The main Long Canyon channel is fairly broad and flat and covers large areas, but it is generally of low grade. The gold usually is fine. Bedrock is slate and quartz-bearing schist of the Blue Canyon Formation (Carboniferous), with granodiorite to the east. The gravels are capped by andesite and rhyolite.
Workings Information: Mining was done by hydraulicking and drifting.
Mines: Blacksmith Flat, Clydesdale, Goggins, Granite, Ralston, Russian Ravine, Zuver.
Geology: The deposits are along a west- and southwest-trending Tertiary gravel channel known as the Long Canyon channel, the eastward continuation of the main Michigan Bluff-Forest Hill channel. The gravels are interbedded with rhyolite tuffs and contain granitic boulders. The main Long Canyon channel is fairly broad and flat and covers large areas, but it is generally of low grade. The gold usually is fine. Bedrock is slate and quartz-bearing schist of the Blue Canyon Formation (Carboniferous), with granodiorite to the east. The gravels are capped by andesite and rhyolite.
Workings Information: Mining was done by hydraulicking and drifting.
Mines: Blacksmith Flat, Clydesdale, Goggins, Granite, Ralston, Russian Ravine, Zuver.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded from this region.Mineral List
Mineral list contains entries from the region specified including sub-localities9 valid minerals.
Detailed Mineral List:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Hematite | 4.CB.05 | Fe2O3 |
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| ⓘ | var. Rutilated Quartz | 4.DA.05 | SiO2 |
| ⓘ | var. Smoky Quartz | 4.DA.05 | SiO2 |
| ⓘ | Rutile | 4.DB.05 | TiO2 |
| ⓘ | Brookite | 4.DD.10 | TiO2 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Dolomite | 5.AB.10 | CaMg(CO3)2 |
| Group 9 - Silicates | |||
| ⓘ | Schorl | 9.CK.05 | NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH) |
| ⓘ | Muscovite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
| Unclassified | |||
| ⓘ | 'K Feldspar var. Adularia' | - | KAlSi3O8 |
| ⓘ | 'Hornblende Root Name Group' | - | ◻Ca2(C2+4C3+)(AlSi7O22)W2 |
| ⓘ | 'K Feldspar' | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| H | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| B | Boron | |
| B | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| C | Carbon | |
| C | ⓘ Dolomite | CaMg(CO3)2 |
| O | Oxygen | |
| O | ⓘ K Feldspar var. Adularia | KAlSi3O8 |
| O | ⓘ Brookite | TiO2 |
| O | ⓘ Dolomite | CaMg(CO3)2 |
| O | ⓘ Hematite | Fe2O3 |
| O | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Quartz var. Rutilated Quartz | SiO2 |
| O | ⓘ Rutile | TiO2 |
| O | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| O | ⓘ Quartz var. Smoky Quartz | SiO2 |
| O | ⓘ Hornblende Root Name Group | ◻Ca2(C42+C3+)(AlSi7O22)W2 |
| Na | Sodium | |
| Na | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| Mg | Magnesium | |
| Mg | ⓘ Dolomite | CaMg(CO3)2 |
| Al | Aluminium | |
| Al | ⓘ K Feldspar var. Adularia | KAlSi3O8 |
| Al | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Al | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| Al | ⓘ Hornblende Root Name Group | ◻Ca2(C42+C3+)(AlSi7O22)W2 |
| Si | Silicon | |
| Si | ⓘ K Feldspar var. Adularia | KAlSi3O8 |
| Si | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Si | ⓘ Quartz | SiO2 |
| Si | ⓘ Quartz var. Rutilated Quartz | SiO2 |
| Si | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| Si | ⓘ Quartz var. Smoky Quartz | SiO2 |
| Si | ⓘ Hornblende Root Name Group | ◻Ca2(C42+C3+)(AlSi7O22)W2 |
| S | Sulfur | |
| S | ⓘ Pyrite | FeS2 |
| K | Potassium | |
| K | ⓘ K Feldspar var. Adularia | KAlSi3O8 |
| K | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Ca | Calcium | |
| Ca | ⓘ Dolomite | CaMg(CO3)2 |
| Ca | ⓘ Hornblende Root Name Group | ◻Ca2(C42+C3+)(AlSi7O22)W2 |
| Ti | Titanium | |
| Ti | ⓘ Brookite | TiO2 |
| Ti | ⓘ Rutile | TiO2 |
| Fe | Iron | |
| Fe | ⓘ Hematite | Fe2O3 |
| Fe | ⓘ Pyrite | FeS2 |
| Fe | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
Localities in this Region
- California
- California
- Placer County
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Calaveras-Baker DomainDomain
- Sierra Nevada BatholithVolcanic Arc
USA
- Sierra NevadaMountain Range
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References
Devil Peak, Ralston Divide Mining District, Placer County, California, USA