Chaney Winship-Doak Mine (Winship-Donovan Mine; Chaney deposit; Chaney lease), Tesla, Livermore Mining District (Tesla District), Alameda County, California, USAi
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Latitude & Longitude (WGS84):
37° 36' 15'' North , 121° 35' 26'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Livermore | 88,126 (2017) | 17.8km |
| Mountain House | 9,675 (2011) | 20.3km |
| Tracy | 87,075 (2017) | 20.9km |
| Pleasanton | 79,510 (2017) | 25.8km |
| Sunol | 913 (2011) | 26.2km |
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 |
|---|---|---|
| Livermore Valley Lithophiles | Livermore, California | 18km |
| Santa Clara Valley Gem & Mineral Society | San Jose, California | 40km |
| Mineral & Gem Society of Castro Valley | Hayward, California | 44km |
| East Bay Mineral and Lapidary Club | Hayward, California | 45km |
| Stockton Lapidary & Mineral Club | Stockton, California | 47km |
A former Mn occurrence/mine located in the NE¼ sec. 12, T4S, R3E, MDM, 4.1 km (2.5 miles) SSE of Tesla, along the E canyon wall of Corral Hollow, on private land (private lease). Discovered in 1942. Owned by Frank J. R. Rodriguez, California (1974). Operated by O.E. Chaney, California
(1974). MRDS database stated accuracy for this location is 1,000 meters.
Mineralization is hosted in Late Cretaceous chert. The ore body strikes N and dips 35E with a depth-to-bottom of 10.67 meters. A bed of Mn oxide occurs in a white chert. It ranges from 1 to 5 feet, with an average of 2.5 feet in thickness. Oxide ore grades downward into rhodochrosite-neotocite ore. Some places the ore is nearly pure, coarse-grained carbonate. The carbonate ore probably contains at least 35% Mn. At least 2 thin beds of high-grade rhodochrosite are exposed in the workings. These range from 6 inches to 1 foot in thickness. The ore is a banded mixture of rhodochrosite and neotocite in most places. Local rocks include rocks of the Franciscan melange.
Workings include surface and underground openings comprised of an inclined shaft 35 feet deep. 75 feet below the shaft collar a tunnel was said to be 215 feet long, and is said to be connected to the shaft by a complicated series of workings.
It was reported that 200 tons of ore was shipped from this mine during WWI.
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
2 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:
| ⓘ Neotocite Formula: (Mn,Fe)SiO3 · H2O (?) |
| ⓘ Rhodochrosite Formula: MnCO3 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 5 - Nitrates and Carbonates | |||
|---|---|---|---|
| ⓘ | Rhodochrosite | 5.AB.05 | MnCO3 |
| Group 9 - Silicates | |||
| ⓘ | Neotocite | 9.ED.20 | (Mn,Fe)SiO3 · H2O (?) |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Neotocite | (Mn,Fe)SiO3 · H2O (?) |
| C | Carbon | |
| C | ⓘ Rhodochrosite | MnCO3 |
| O | Oxygen | |
| O | ⓘ Neotocite | (Mn,Fe)SiO3 · H2O (?) |
| O | ⓘ Rhodochrosite | MnCO3 |
| Si | Silicon | |
| Si | ⓘ Neotocite | (Mn,Fe)SiO3 · H2O (?) |
| Mn | Manganese | |
| Mn | ⓘ Neotocite | (Mn,Fe)SiO3 · H2O (?) |
| Mn | ⓘ Rhodochrosite | MnCO3 |
| Fe | Iron | |
| Fe | ⓘ Neotocite | (Mn,Fe)SiO3 · H2O (?) |
Other Databases
| Link to USGS MRDS: | 10027966 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
- Coast MountainsMountain Range
North America PlateTectonic Plate
- California Coast RangesAccretionary Complex
- Franciscan DomainDomain
USA
- California
- Diablo RangeMountain Range
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