Reed Mine (California Mine; Royal Mine; Soda Springs Mine), Knoxville area, Knoxville Mining District, Coast Ranges, Yolo County, California, USAi
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Latitude & Longitude (WGS84):
38° 51' 55'' North , 122° 22' 14'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Guinda | 254 (2011) | 15.8km |
| Hidden Valley Lake | 5,579 (2011) | 17.5km |
| Lower Lake | 1,294 (2011) | 21.3km |
| Clearlake | 15,182 (2017) | 24.4km |
| Middletown | 1,323 (2011) | 24.6km |
A former Hg mine located in secs. 23, 25 & 26, T12N, R5W, MDM, 5.0 km (3.1 miles) NNW of Knoxville (Napa County), at the northern tip of the Knoxville District, on private land. This property covers an area a little over 1 mile long and several hundred yards wide. Discovered in 1870. First produced in 1871. Production years included: 1873-1880, 1914-1917, 1931-1932, 1939-1948. Owned by the Bradley Mining Co. MRDS database accuracy for this location is 10 meters.
Mineralization is Pliocene in age and is hosted in rocks of the Franciscan Complex (Late Jurassic-Late Cretaceous serpentinite). The ore body strikes NW and dips SW at a width of 30.48 meters and a length of 1,609.3 meters. Controls for ore emplacement included altered serpentine and a fault zone. The mineralized zone lies on a NW-trending fault that is the contact between serpentine on the SW side and sandstone and shale of the Great Valley sequence (Knoxville) on the NE side. Alteration is local and involves silica carbonate alteration of serpentine. Local rocks include ultramafic rocks, chiefly Mesozoic, unit 3 (Coast Ranges and Western Klamath Mountains).
Local structures include a serpentine - sediment contact.
Workings include surface and underground openings with a length of 1,828.8 meters and an overall depth of 106.68 meters.
Production data are found in: U.S. Bureau of Mines file data.
Analytical data results: Assays to 5.4 pounds/ton Hg (DMEA report).
Production statistics: Year 1962: Accuracy: estimated: ^10-25 pounds/ton (553 grams/metric ton) Hg. NOTE: Metric equivalent in grams is discrepant relative to the product weight in pounds.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ 'Aragotite' Formula: (C,H) |
| ⓘ Calcite Formula: CaCO3 |
| ⓘ Cinnabar Formula: HgS Description: Occurs as veinlets and disseminations in silica-carbonate rock near gouge of the fault zone. |
| ⓘ Dolomite Formula: CaMg(CO3)2 |
| ⓘ Idrialite Formula: C22H14 |
| ⓘ Marcasite Formula: FeS2 References: |
| ⓘ Metacinnabar Formula: HgS Description: Occurs as massive and crystalline material. Abundant in the early days of mining here (1870-1880) as the principal ore mineral. References: |
| ⓘ 'Petroleum' Description: Occurs as a dark, heavy oil. |
| ⓘ Pyrite Formula: FeS2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| 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 5 - Nitrates and Carbonates | |||
| ⓘ | Calcite | 5.AB.05 | CaCO3 |
| ⓘ | Dolomite | 5.AB.10 | CaMg(CO3)2 |
| Group 10 - Organic Compounds | |||
| ⓘ | Idrialite | 10.BA.20 | C22H14 |
| Unclassified | |||
| ⓘ | 'Aragotite' | - | (C,H) |
| ⓘ | 'Petroleum' | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Aragotite | (C,H) |
| H | ⓘ Idrialite | C22H14 |
| C | Carbon | |
| C | ⓘ Aragotite | (C,H) |
| C | ⓘ Calcite | CaCO3 |
| C | ⓘ Dolomite | CaMg(CO3)2 |
| C | ⓘ Idrialite | C22H14 |
| O | Oxygen | |
| O | ⓘ Calcite | CaCO3 |
| O | ⓘ Dolomite | CaMg(CO3)2 |
| Mg | Magnesium | |
| Mg | ⓘ Dolomite | CaMg(CO3)2 |
| S | Sulfur | |
| S | ⓘ Cinnabar | HgS |
| S | ⓘ Marcasite | FeS2 |
| S | ⓘ Metacinnabar | HgS |
| S | ⓘ Pyrite | FeS2 |
| Ca | Calcium | |
| Ca | ⓘ Calcite | CaCO3 |
| Ca | ⓘ Dolomite | CaMg(CO3)2 |
| Fe | Iron | |
| Fe | ⓘ Marcasite | FeS2 |
| Fe | ⓘ Pyrite | FeS2 |
| Hg | Mercury | |
| Hg | ⓘ Cinnabar | HgS |
| Hg | ⓘ Metacinnabar | HgS |
Other Databases
| Link to USGS MRDS: | 10103813 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
- Coast MountainsMountain Range
North America PlateTectonic Plate
- California Coast RangesAccretionary Complex
- Franciscan DomainDomain
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References
(n.d.) Minerals Availability System (MAS), U.S. Bureau of Mines.file ID #0061130019
